Previously developed land (brownfield): can you build houses outside a settlement?

 

Previously developed land (PDL), often called brownfield land, has always been important in planning. The August 2026 National Planning Policy Framework has made it particularly interesting for land outside settlements because policy S5(1)(d) expressly supports the redevelopment of previously developed land, including residential and mixed-use redevelopment.

That can create genuine development opportunities on sites such as commercial yards, depots, former industrial land, some equestrian establishments and parts of former military sites. But the phrase previously developed land has a specific planning definition. A brown-looking site is not necessarily PDL, and owning a PDL building does not turn every field or paddock around it into brownfield land.

This page explains what S5(1)(d) does, what counts as PDL, where the opportunity may lie, and the traps that can still stop a housing proposal.

 

The short answer: S5(1)(d) creates a real opportunity

 

For land outside a settlement, policy S5 is deliberately more selective than the policy for development within settlements. But one of the listed forms of development which is acceptable in principle is the redevelopment of previously developed land, including a material change of use to residential or mixed use including residential.

This matters because the PDL route in S5(1)(d) does not depend on the council failing the five year housing land supply test or scoring below 75% in the Housing Delivery Test. Those housing-shortfall tests are relevant to the separate unmet-need route in S5(1)(j).

Where S5(1)(d) genuinely applies, the proposal starts from the favourable S5 national decision-making position: it should be approved unless the benefits would be substantially outweighed by the adverse effects when assessed against the relevant national decision-making policies.

 

S5(1)(c) and S5(1)(d) are different routes

The paragraph immediately before the PDL limb deals with the reuse, extension, alteration or replacement of an existing building. Where that route is used for a replacement building, S5(1)(c) says the replacement should be for the same use and should not be disproportionately larger than the building it replaces.

That condition should not simply be imported into S5(1)(d). The next limb is a separate route for the redevelopment of previously developed land, and it expressly includes a material change of use to residential or mixed use including residential. Reading the same-use restriction across from (c) into (d) would cut across that express wording. Footnote 25 also attaches to S5(1)(c), not S5(1)(d): it says the existing building for the purposes of (c) is to be assessed as the property existing on the date the August 2026 Framework was published. S5(1)(d) has no equivalent footnote imposing a same-use, existing-building or publication-date size test.

That does not mean any proposal can avoid S5(1)(c) merely by calling itself redevelopment. The threshold question for (d) is whether the relevant land is genuinely previously developed land. A replacement proposal on land which does not satisfy the PDL definition may still have to stand or fall under the building route in (c). Where genuine PDL exists, however, (d) is an independent route and should be analysed on its own wording.

That is powerful, but it is not an automatic planning permission. The statutory starting point in section 38(6) of the Planning and Compulsory Purchase Act 2004 still applies, and the site still has to survive the relevant design, landscape, highway, flood-risk, heritage, ecology and other planning tests.

 

What counts as previously developed land?

 

The NPPF uses previously developed land and brownfield land as equivalent planning terms. The definition is more precise than the everyday meaning of “brownfield”.

The exact glossary wording matters here, particularly the words “is or was”, the reference to curtilage, and the exclusions which follow. The August 2026 NPPF defines previously developed land as follows:

Previously developed land: Land which has been lawfully developed and is or was occupied by a permanent structure and any fixed surface infrastructure associated with it, including the curtilage of the developed land (although it should not be assumed that the whole of the curtilage should be developed). It also includes land comprising large areas of fixed surface infrastructure such as large areas of hardstanding which have been lawfully developed. Previously developed land excludes: land that is or was last occupied by agricultural or forestry buildings; land that has been developed but where provision for restoration has been made through development management procedures (including development related to minerals extraction, waste disposal by landfill and renewable and low carbon energy development, where provision for restoration exists); land in built-up areas such as residential gardens, parks, recreation grounds and allotments; and land that was previously developed but where the remains of the permanent structure or fixed surface structure have blended into the landscape.

The words “is or was” mean that a permanent structure does not necessarily have to remain on the land today for the land to qualify. But that is subject to the later exclusion where the remains of the permanent structure or fixed surface structure have blended into the landscape. Likewise, curtilage is expressly included in the definition, but the same sentence immediately warns that it should not be assumed that the whole curtilage should be developed.

There is another useful curtilage point. In Dartford Borough Council v SSCLG [2017] EWCA Civ 141, the Court of Appeal held that the exclusion for “land in built-up areas such as private residential gardens…” did not exclude every residential garden regardless of location. The examples follow and qualify the words “land in built-up areas”. A residential curtilage outside a built-up area is therefore not excluded merely because it is a garden, although it must still satisfy the rest of the PDL definition and that does not mean the whole curtilage should be developed.

Depending on their planning history and physical condition, examples can include:

• former industrial and commercial premises;
• builders’ yards, depots, workshops and vehicle-storage sites;
• petrol stations and substantial lawful car parks or hardstanding;
• some former military bases, depots, barracks, hangars, runways and other defence sites;
• lawful equestrian establishments with permanent buildings and fixed infrastructure, where the planning use and history support PDL status; and
• other land with permanent lawful structures or large areas of lawfully developed fixed surface infrastructure.

The definition also contains express exclusions. These include land that is or was last occupied by agricultural or forestry buildings; certain minerals and landfill sites where restoration has been secured; specified land in built-up areas such as residential gardens, parks, recreation grounds and allotments; and land where the remains of previous development have blended into the landscape.

For the broader distinction between brownfield, greenfield, Green Belt and grey belt, see our guide to grey belt, Green Belt, greenfield and brownfield land.

 

Previously developed does not mean the whole ownership is brownfield

 

This is one of the biggest traps. The fact that part of a holding is PDL does not automatically make every adjoining field, paddock, garden or area of open land previously developed.

The NPPF definition can include curtilage, but it expressly warns that it should not be assumed that the whole curtilage should be developed. The physical and functional relationship with the permanent development matters, as does the planning history.

A stable block and surfaced yard might therefore have a credible PDL case while eight acres of grazing paddocks behind them do not. Likewise, the hangars, workshops and runway of a former airfield may be PDL without every hectare of grassed operational or training land becoming brownfield.

Planning Geek tip: draw the PDL argument on a plan. Identify the buildings, fixed infrastructure, hardstanding and any claimed curtilage separately from adjoining undeveloped land. A vague claim that “the whole site is brownfield” is much easier to attack than a properly evidenced PDL boundary.

The courts have reinforced this point. R (Lee Valley Regional Park Authority) v Broxbourne Borough Council [2015] EWHC 185 (Admin) confirms that some PDL within an application site does not make the whole site PDL. More recently, R (on the application of Ribble Valley Borough Council) v Secretary of State for Housing, Communities and Local Government and Majid Hussain [2025] EWHC 2363 (Admin) concerned an equestrian site and resulted in the permission being quashed after the Inspector treated the whole site as PDL without properly analysing the developed and undeveloped parts.

 

Are equestrian yards and stables previously developed land?

 

Potentially, yes – but not automatically. Equestrian use is not the same thing as agricultural use simply because horses are present. The planning use of the land and buildings matters. Our guide to whether land is agricultural or equestrian explains that distinction.

A lawful commercial livery yard, riding establishment or other non-agricultural equestrian planning unit may contain permanent stables, tack rooms, stores, offices, surfaced yards and other fixed infrastructure capable of supporting a PDL argument. That can make S5(1)(d) particularly interesting where the site lies outside a settlement.

But do not assume every paddock is PDL merely because it is used with the stables. Grazing land normally remains open land unless there is some separate basis for treating it as previously developed. The exact lawful use also matters: keeping horses for recreation, commercial livery, breeding or agricultural grazing can produce different planning facts.

 

 

Example: a livery yard outside a village

A lawful livery yard contains two permanent stable blocks, a tack room, office and substantial surfaced yard, with six acres of paddocks behind. The developed yard may provide a strong S5(1)(d) opportunity for residential redevelopment. The six acres of grass do not become PDL simply because they are in the same ownership. A sensible first feasibility plan would therefore test housing on the genuinely developed part before trying to spread the scheme into the paddocks.

 

What about former military bases and defence sites?

 

Former military sites can be very interesting candidates for S5(1)(d). Barracks, workshops, depots, hangars, stores, bunkers, roads, runways and large areas of hardstanding can all create substantial areas of developed land.

But “former military base” is not itself a planning category which makes every part of the site PDL. You still need to establish that the relevant development was lawful and identify what remains on the ground. Open training land, grassed parts of an airfield, woodland or peripheral undeveloped areas may not share the PDL status of the developed core.

There can also be unusually important site-specific issues: contamination, unexploded ordnance, access, ecology, heritage, noise from continuing defence activity and the cost of removing or adapting infrastructure. Those matters can affect both the planning balance and viability even where the principle of redevelopment receives strong policy support.

 

Are agricultural barns previously developed land?

 

Usually no for the PDL route. The NPPF definition expressly excludes land that is or was last occupied by agricultural or forestry buildings. A permanent agricultural barn therefore does not become brownfield merely because it is large, old or built of concrete and steel.

That does not mean an agricultural owner has no development opportunity. A qualifying agricultural building may have a completely different route through Class Q, which can permit a change from an agricultural building to dwellinghouses subject to its conditions and limitations. Class R can provide a route from qualifying agricultural buildings to specified flexible commercial uses. Full planning permission may also be supported through another S5 category, including relevant building-reuse or rural-development policies.

There is a further nuance on mixed farm sites. The agricultural-building exclusion should not be turned into the opposite blanket assumption that nothing anywhere on a farm can ever be PDL. A holding may contain separate lawful commercial uses, workshops, yards or fixed infrastructure with a different planning history. Equally, a concrete yard does not become PDL automatically merely because it is hard. Establish what was lawfully developed, for what purpose, and which planning unit it belongs to.

 

Can an agricultural barn become a stronger PDL opportunity after Class Q, Class R or farm diversification?

 

Potentially, yes – and there is High Court authority supporting the importance of a lawful change of use. The NPPF exclusion is framed around land that is or was last occupied by agricultural or forestry buildings. In R (Lee Valley Regional Park Authority) v Broxbourne Borough Council [2015] EWHC 185 (Admin), Ouseley J held, under the then NPPF definition, that a building which had lawfully changed from agricultural use to a non-agricultural or mixed use was no longer an agricultural building for this purpose. He used the straightforward example of a barn lawfully converted to a dwelling: it was once an agricultural building, but after the lawful conversion it is a dwellinghouse rather than an agricultural building.

That reasoning is highly relevant to the August 2026 wording, which now expressly refers to land that is or was last occupied by agricultural or forestry buildings. It gives real support to the proposition that a qualifying agricultural building which is lawfully changed to, and genuinely implements, a residential or other non-agricultural use can have a materially different later PDL status from an untouched agricultural barn. Broxbourne also makes an important distinction: merely ceasing agricultural use is not enough, and an unlawful change of use which could still be enforced against does not achieve the same result.

This does not mean that obtaining a prior approval or planning permission on paper automatically creates a brownfield housing site. The change relied upon should be lawfully implemented. Nor does Class Q or Class R give a separate right to demolish the building and replace it with new houses. Any later redevelopment would normally need its own planning permission and would have to be assessed on its own merits.

 

 

Route 1: Class Q first, then test a better redevelopment

A qualifying barn may obtain Class Q prior approval for conversion to dwellinghouses. Even before implementation, a Class Q scheme which has a real prospect of being carried out can be important as a fallback position when a later full planning application proposes a better designed alternative. In Mansell v Tonbridge and Malling Borough Council [2017] EWCA Civ 1314, the Court of Appeal confirmed that a “real prospect” need not be probable or likely: a genuine possibility can suffice. There is no universal rule requiring a granted fallback permission, a firm alternative design or an express statement that the landowner will implement the fallback; the question is fact-sensitive and involves planning judgment.

For example, a large barn might have a lawful Class Q fallback for several dwellings, while a full planning application proposes demolition and a more coherent group of new homes with better outlook, landscaping, access and appearance. The Class Q scheme does not create an automatic entitlement to the replacement scheme, but the realistic fallback can be a material consideration in the planning balance.

If the Class Q change is lawfully implemented, the position becomes materially stronger. The building is then in residential use rather than remaining an agricultural building. The reasoning in Broxbourne [2015] EWHC 185 (Admin) supports treating that lawful change of use as significant when applying the agricultural-building exclusion. A subsequent application can therefore test whether the developed residential land now qualifies as PDL and, if so, whether redevelopment under S5(1)(d) is justified, potentially with a different layout or number of dwellings where the genuinely developed land can properly accommodate them. That still does not make the whole farm, planning unit or application site PDL: the PDL boundary and any adjoining non-PDL land must be assessed separately.

Important: there is no rule saying that five Class Q dwellings automatically justify five replacement houses, or seven, or any other number. The extent of the PDL, the lawful residential curtilage, design, landscape, access, drainage, ecology and all other planning impacts still determine what can appropriately be built.

 

 

Route 2: Class R to a genuine commercial use

Class R can allow a qualifying agricultural building and land within its curtilage to move to specified flexible commercial uses, subject to the Class R limitations, conditions and any required prior approval.

If that non-agricultural use is lawfully implemented, a later PDL argument may be materially stronger because the building is no longer simply an agricultural building. The reasoning in Broxbourne supports the importance of a lawful replacement non-agricultural use when asking whether the agricultural-building exclusion still applies. The evidence of implementation and the actual planning unit will matter. Merely securing the Class R route on paper and never carrying out the change should not be treated as though the building’s lawful use has already changed. Nor should a lawful change to one building be used to label unrelated fields or paddocks as PDL.

 

 

Route 3: farm diversification through full planning permission

The same strategic question can arise where full planning permission is granted for genuine farm diversification – for example workshops, offices, tourism, storage, leisure or another non-agricultural use. Once such a permission is lawfully implemented, the later status of the developed land needs to be assessed by reference to what is actually there and its lawful planning use, rather than assuming the agricultural-building exclusion continues forever.

This can make the first application surprisingly important. On some holdings the best long-term route may not be to jump immediately to a speculative housing application. Establishing a lawful and viable non-agricultural use, or securing and implementing a Class Q residential conversion, may materially alter the fallback position and the way a later redevelopment proposal is assessed.

Planning Geek view: this is an area where sequencing matters. Before using Class Q, Class R, a diversification application or a full residential application, consider what each route does to the planning unit, lawful use, curtilage, fallback position and future PDL argument. The quickest permission today is not always the route that creates the strongest development position tomorrow.

 

Other rural PDL that may be worth investigating

 

S5(1)(d) is not limited to picturesque conversions. Some of the more promising opportunities may be visually ordinary sites which planning policy has historically treated as countryside development:

• former haulage and transport yards;
• builders’ merchants and contractors’ yards;
• vehicle repair, storage and scrapyard sites;
• former petrol filling stations;
• small industrial estates, workshops and depots;
• commercial caravan or container-storage land with substantial lawful fixed infrastructure;
• former utility and infrastructure compounds; and
• redundant institutional or defence premises.

The crucial questions are whether the land is genuinely PDL, whether the proposed redevelopment is confined to or properly related to that developed land, and whether the site can accommodate the new use without unacceptable harm.

 

Can you build more than the existing footprint?

 

This is one of the most commercially interesting features of S5(1)(d). The PDL redevelopment limb does not itself contain the same sort of express “same use”, “not materially larger” or existing-building size restriction found in some neighbouring policy routes.

That does not create an unlimited right to replace a small shed with an estate, and it does not allow the PDL policy to be used as a passport for spreading built development onto adjoining non-PDL land. The extent of the PDL remains fundamental, and scale, density, landscape impact, access, infrastructure, design and the relationship with neighbouring development all feed into the S5 balance and other national policies.

This distinction is reinforced very clearly by Ribble Valley Borough Council v SSHCLG and Hussain [2025] EWHC 2363 (Admin). At paragraph 91 the court rejected an argument which confused the partial or complete redevelopment of PDL with the redevelopment of an application site which happened to be only partly PDL. Where a proposal extends onto non-PDL parts of a mixed site, the planning-policy position and effects on those parts must be assessed separately.

So the correct question is not necessarily “how many square metres were there before?”. It can instead be: what scale and form of redevelopment makes an appropriate and efficient use of the land which genuinely comprises this previously developed site? That approach is reinforced by policy L3(2)(b), which says that outside settlements development footprints should make the best use of a site’s development potential, taking into account the policies in the Framework.

That distinction may be valuable on larger yards, depots, military sites and equestrian establishments where the historic built form is low density but the developed area is considerably larger than the building footprints.

 

Do you need a poor Housing Delivery Test or no five year supply?

 

No – not to use S5(1)(d). This is an important distinction.

Failure to demonstrate the required five year housing land supply, or a Housing Delivery Test result below 75%, can provide evidence of unmet housing need for the separate S5(1)(j) route. S5(1)(d) is a PDL redevelopment route in its own right.

A housing shortfall can still add weight to the benefits of a residential scheme, but an applicant should not accidentally present a strong PDL case as though it only works while the council is failing its housing numbers.

 

What about isolated homes in the countryside?

 

PDL status does not make the separate policy on isolated homes in the countryside disappear. Where a residential proposal would create genuinely isolated homes, the specific national policy for isolated housing still needs to be considered.

This is why location remains important even though S5(1)(d) does not itself require a housing-land-supply shortfall. A former yard physically associated with a group of houses can present a different planning case from an identical yard standing alone in open countryside with no nearby development.

Do not confuse “outside the settlement boundary” with “isolated”. They are different planning questions. Our guide to settlement boundaries explains the new August 2026 settlement definition and why a site outside a settlement can still be close to a group of houses.

 

Does S5(1)(d) apply to Green Belt land?

 

Do not use S5(1)(d) as a shortcut around Green Belt policy. S5(5) expressly says that S5 does not apply to development proposals in the Green Belt or on land designated as Local Green Space. Those sites use the separate national policy routes identified in S5(5).

Previously developed land can nevertheless be highly important in the Green Belt. Under GB7(1)(e), redevelopment of previously developed land – including a material change of use to residential or mixed use including residential – is not inappropriate Green Belt development where it would not cause substantial harm to the openness of the Green Belt. PDL can also qualify as grey belt, but not automatically. Under the August 2026 glossary, PDL and other Green Belt land must, “in either case”, not strongly contribute to any of Green Belt purposes (a), (b) or (d) in GB2. This is separate from the GB7(1)(e) PDL route: a Green Belt PDL site which does not satisfy the grey-belt definition can still be not inappropriate under GB7(1)(e) if its redevelopment would not cause substantial harm to openness. Depending on the proposal, the Golden Rules and other Green Belt requirements may also apply.

The first question should therefore be: is the site Green Belt? If yes, move to GB6, GB7 and where relevant GB8 rather than applying the ordinary outside-settlement S5(1)(d) route. Where a Green Belt proposal is not inappropriate through GB7, S5(5) then applies a favourable balance: it should be approved unless the benefits are substantially outweighed by adverse effects when assessed against the national decision-making policies, applying S5(2).

 

What if the Local Plan says no housing outside the settlement boundary?

 

The development plan remains the statutory starting point. S5 does not delete an adopted local policy.

However, the August 2026 NPPF also contains an important implementation rule in Annex A. Where an existing development-plan policy, or part of it, is materially inconsistent with a current national decision-making policy, Annex A can require very limited weight to be given to that inconsistent part, subject to the Framework’s exception for plans examined and adopted against the August 2026 Framework.

That could become particularly important where an older countryside policy applies a blanket presumption against residential redevelopment outside settlement boundaries while S5 now expressly identifies redevelopment of PDL as acceptable in principle.

The argument is not “the Local Plan is old, so ignore it”. The proper exercise is to identify the exact local policy, identify the precise inconsistency with S5, and then apply the current decision-making balance.

 

How do you prove that a site is PDL?

 

For a valuable site, do not leave PDL status as an unsupported assertion. Useful evidence can include:

• the planning history and old permissions;
• lawful development certificates and evidence of established lawful uses;
• historic and current aerial photography;
• Ordnance Survey and historic mapping;
• business rates, licensing or other records showing the site’s use;
• dated photographs and building records;
• a measured site survey showing buildings, hardstanding and fixed infrastructure;
• evidence defining the planning unit and any genuine curtilage; and
• evidence explaining when and how former structures were removed if the site is now partly cleared.

If the underlying use or development was never authorised and lawfulness is uncertain, it may be sensible to resolve that first. Our guide to Certificates of Lawfulness and the ten-year rule explains one route for proving an existing lawful use or development.

 

Worked examples: where S5(1)(d) may create an opportunity

 

 

Example 1: a commercial equestrian yard outside a settlement

The site contains lawful permanent stables, an office, tack rooms and extensive hardstanding. It is not in the Green Belt and sits near a small group of existing houses.

Opportunity: establish the PDL boundary and test residential redevelopment of the developed yard under S5(1)(d). The nearby houses may also be relevant when considering whether the proposal would create isolated homes.

Trap: do not include the surrounding grazing paddocks in the PDL claim without a proper basis.

 

 

Example 2: a former military depot

The developed core contains stores, workshops, internal roads and large areas of hardstanding, but much of the wider holding is open land.

Opportunity: the developed core may offer a substantial PDL redevelopment opportunity and may be capable of a different scale of development from the footprint of the old buildings.

Trap: separate the genuinely developed area from open training land and investigate contamination, ecology, heritage and access before assuming the site is straightforward.

 

 

Example 3: a redundant agricultural barn

The only development is a barn last used for agriculture with an ordinary agricultural yard.

S5(1)(d): do not assume this is PDL; the NPPF expressly excludes land last occupied by agricultural or forestry buildings.

Alternative: check Class Q, the separate S5 building routes and the full planning position.

 

 

Example 4: a builders’ yard just outside a village

A lawful yard has workshops, storage buildings and extensive hardstanding. The Local Plan has a broad policy resisting housing outside the settlement boundary.

Opportunity: S5(1)(d) can make the principle of PDL redevelopment much stronger than it would have been under the old national policy structure. Test whether the blanket local restraint is materially inconsistent with current S5 and therefore affected by Annex A.

Trap: design, highways, landscape and neighbour impacts still need a good answer.

 

 

Example 5: a demolished rural industrial site that is now overgrown

Buildings were removed years ago and vegetation has reclaimed the site.

Question: have the remains of the permanent structure or fixed surface structure blended into the landscape? If so, the NPPF exclusion may mean the site has ceased to qualify as PDL. Historic development alone is not always enough.

 

Does being on a Brownfield Land Register give planning permission?

 

No. A council’s Brownfield Land Register is related to PDL but is not the same question. The register identifies qualifying previously developed sites which the authority considers appropriate for residential development under the brownfield register regime.

The register has two parts. Part 1 identifies qualifying brownfield sites considered suitable for residential development; entry in Part 1 does not by itself grant planning permission. A site entered in Part 2 can receive Permission in Principle for the housing-led development specified through the statutory register process, with technical details consent still required before development can proceed as a full planning permission. Land can also satisfy the NPPF definition of PDL without appearing on the register at all.

For an S5(1)(d) application, the important issue is whether the site meets the NPPF PDL definition and whether the proposed redevelopment is acceptable under the development plan and current national decision-making policies.

 

Lochailort: Part 1 of the Brownfield Register does not force allocation

 

Lochailort Kentford Limited v West Suffolk Council & Anor [2026] EWHC 1870 (Admin) is a useful warning against reading too much into Part 1 of a Brownfield Land Register.

The case concerned a 15.92 hectare promoted site at Kentford. A smaller 3.83 hectare area containing existing buildings and their curtilages had been entered in Part 1 of West Suffolk's register, with an estimated yield of 76 to 193 dwellings. The owner argued that this showed the council regarded the wider promoted site as suitable for housing and was inconsistent with the decision not to allocate it in the Local Plan.

The High Court rejected the challenge. Part 1 entry meant that the particular registered land satisfied the statutory brownfield-register criteria, but it did not amount to an allocation of the wider site and did not undermine the council's separate comparative judgment about which sites should be allocated through the Local Plan. The court also stressed that only part of the promoted site was on the register.

The distinction is important: Part 1 status is evidence that the registered land has passed the Brownfield Land Register tests, but it is not planning permission and it does not compel a council to allocate the land in its Local Plan. Part 2 is different because entry there grants permission in principle for the specified housing-led development.

 

A practical PDL opportunity check

 

If you own or are considering buying a rural yard, depot, equestrian establishment, former military site or other developed land outside a settlement, work through these questions before valuing it as a housing site:

• Is the development lawful? If not, can lawfulness be proved?
• What exactly is PDL? Draw the buildings, hardstanding, infrastructure and claimed curtilage on a plan.
• Is any part excluded? Agricultural/forestry buildings, restored minerals or landfill land and development that has blended into the landscape need particular care.
• Is the site within or outside a settlement? Check the current NPPF definition as well as the development-plan boundary.
• Is it Green Belt or Local Green Space? If so, use the separate policy route.
• Would the homes be isolated? Look at the relationship to existing settlements and groups of houses.
• What does the development plan say? Check allocations, employment protection, countryside policies and the policies map.
• Does Annex A affect an older restrictive policy? Age alone is not enough; identify a material inconsistency with current national policy.
• What scale can the site absorb? Do not start with a target number of houses and force them onto the site.
• What harms need solving? Access, landscape, flooding, contamination, ecology, heritage, amenity, drainage and infrastructure can still determine the outcome.

 

Every site is different

 

The opportunities described on this page are not a one-rule-fits-all route to housing in the countryside. Small differences in planning history, lawful use, implementation, curtilage, Green Belt status, access, landscape character, ecology or the relationship with nearby houses can completely change the answer. A Class Q, Class R or diversification route that is valuable on one farm may be unnecessary, unavailable or even strategically unhelpful on another.

In particular, do not carry out works or changes of use simply to try to create a future PDL argument without first understanding the consequences. Implementation can affect existing permissions, permitted development rights, the planning unit, valuation, tax and the evidence needed for a later application.

 

 

Frequently asked questions about previously developed land

 

 

Q1: Is previously developed land the same as brownfield land?

For NPPF planning policy, yes. Brownfield land refers to previously developed land as defined in the Framework. The everyday description of a site as “brownfield” is not enough; it must satisfy the planning definition.

 

Q2: Can I build houses on PDL outside a settlement?

Potentially. S5(1)(d) expressly supports redevelopment of previously developed land outside settlements, including residential and mixed-use redevelopment. It is a strong in-principle route, not an automatic permission.

 

Q3: Does the council need to have a poor Housing Delivery Test result?

No. The S5(1)(d) PDL route does not depend on HDT or five year housing land supply. Those matters can create a separate unmet-housing-need route under S5(1)(j).

 

Q4: Are stables brownfield land?

They can be, depending on the lawful planning use, permanence of the structures and site history. A non-agricultural equestrian yard may have a strong PDL case. Agricultural use and grazing need separate analysis.

 

Q5: Are agricultural barns brownfield?

The NPPF definition expressly excludes land that is or was last occupied by agricultural or forestry buildings. That means a normal agricultural barn should not simply be treated as PDL. Check Class Q, Class R, farm diversification and the other planning routes instead.

 

Q6: Does getting Class Q make an agricultural barn PDL?

Not automatically. An unimplemented Class Q prior approval can be important as a realistic fallback, but the agricultural building has not necessarily changed its lawful use merely because the prior approval exists. If the Class Q residential use is lawfully implemented, the later PDL analysis may be materially stronger because the building is no longer simply last occupied as an agricultural building. Any subsequent demolition and redevelopment would still need its own planning permission.

 

Q7: Could Class R or farm diversification help create a later PDL opportunity?

Potentially. If a qualifying agricultural building lawfully changes to, and genuinely implements, a non-agricultural commercial or diversification use, the later PDL assessment may be different. This is highly site-specific: the actual lawful use, planning unit, curtilage, extent of development and evidence of implementation all matter.

 

Q8: Can I use Class Q and then apply for more or different houses?

You can make a later full planning application, and a realistic Class Q scheme may be relevant as a fallback. But Class Q does not give an automatic right to demolish the barn, rebuild detached houses or increase the number of dwellings. A later scheme must be justified under the development plan and current national policy, including any S5(1)(d) PDL argument that genuinely applies.

 

Q9: Is a former military base previously developed land?

Often substantial parts can be, particularly permanent buildings, roads, runways and hardstanding. But the whole ownership is not automatically PDL: open training land, grassed areas and land where development has disappeared into the landscape may be different.

 

Q10: Can new housing be larger than the buildings it replaces?

S5(1)(d) does not itself contain an express replacement-footprint or “not materially larger” cap. The appropriate scale still depends on the extent of the PDL and the planning impacts of the proposal.

 

Q11: Does PDL status override Green Belt?

No. Green Belt has a separate policy route. PDL can be highly relevant to Green Belt and grey-belt policy, but S5(1)(d) should not be treated as a shortcut around those rules.

 

Q12: Can a paddock become PDL because it belongs to a stable yard?

Not merely because it is in the same ownership or planning unit. The PDL definition may include genuine curtilage, but it expressly says the whole curtilage should not automatically be developed. Open paddocks normally need a separate basis before they can be claimed as PDL.

 

Relevant policy and legislation

 

For a live case, use the current Framework and the actual development plan for the site. The most relevant primary sources are:

• National Planning Policy Framework, August 2026 – particularly S5 on development outside settlements, the policy on isolated homes, Annex A and the glossary definition of previously developed land;
• National Planning Policy Framework on GOV.UK – the Government publication page for the current Framework;
• Planning and Compulsory Purchase Act 2004, section 38 – the statutory development-plan framework and section 38(6) decision-making rule;
• Town and Country Planning (Brownfield Land Register) Regulations 2017 – the statutory regime for Part 1 and Part 2 brownfield land registers;
• GPDO 2015, Schedule 2 Part 3 Class Q – the permitted development right for qualifying agricultural buildings to change to dwellinghouses;
• GPDO 2015, Schedule 2 Part 3 Class R – the permitted development right for qualifying agricultural buildings to move to specified flexible commercial uses;
• R (Lee Valley Regional Park Authority) v Broxbourne Borough Council [2015] EWHC 185 (Admin) – important on mixed PDL/non-PDL sites and on lawful changes away from agricultural use;
• R (Ribble Valley Borough Council) v SSHCLG and Hussain [2025] EWHC 2363 (Admin) – an equestrian-site authority on identifying the PDL boundary and mixed sites;
• Dartford Borough Council v SSCLG [2017] EWCA Civ 141 – relevant to curtilage and the built-up-area residential-garden exclusion; and
• Mansell v Tonbridge and Malling Borough Council [2017] EWCA Civ 1314 – the Court of Appeal authority on a realistic fallback position;
• Town and Country Planning (Permission in Principle) Order 2017 – the development order which provides for Permission in Principle through the register regime.

Other Planning Policy Sections

 

Previously Developed Land Page Updated: 29th August 2026