Passivhaus and planning: standards, NPPF and Building Regulations

 

Passivhaus is a voluntary building-performance standard designed around very low energy demand, excellent airtightness, controlled ventilation and occupant comfort. It is used throughout the UK, but it is not itself a planning permission, a use class or a substitute for Building Regulations.

That distinction matters. A Passivhaus proposal can be a strong part of a sustainability case, and in some circumstances the NPPF gives substantial weight to high levels of sustainability. But a low-energy house still has to be acceptable in its location, design, landscape, heritage, access, ecology and every other relevant planning respect.

This page concentrates on Passivhaus planning in England, because the NPPF and English Building Regulations do not apply in the same way in Scotland, Wales or Northern Ireland. The Passivhaus technical standard itself is international.

 

What does Passivhaus actually require?

 

Passivhaus is a performance standard rather than a prescribed construction system. A certified building is modelled using the Passivhaus Planning Package, normally called PHPP, and its construction is checked against the certification criteria.

For a Passivhaus Classic building, the familiar headline criteria include:

• space heating demand of no more than 15 kWh/m² per year, or a peak heating load of no more than 10 W/m²
• airtightness of no more than 0.6 air changes per hour at 50 Pa
• limits on overall primary renewable energy demand
• thermal comfort and overheating criteria

Those figures explain why simply adding a heat pump and solar panels does not make a building Passivhaus. The standard starts with reducing the amount of energy the building needs.

 

Passivhaus, EnerPHit and other standards compared

 

Standard	What it is	Useful headline
Passivhaus Classic	Certified very-low-energy new-build standard	Heating demand ≤15 kWh/m².a or heat load ≤10 W/m²; airtightness ≤0.6 ACH at 50 Pa
EnerPHit	Passivhaus Institute retrofit standard for buildings where full Passivhaus is impractical	For the UK’s cool-temperate climate, heating demand is typically ≤25 kWh/m².a and airtightness ≤1.0 ACH at 50 Pa
AECB CarbonLite New Build	UK low-energy standard using Passivhaus methodology and PHPP	Common headline target of 40 kWh/m².a space-heating demand
Future Homes Standard	English Building Regulations standard	Statutory compliance route, not Passivhaus certification
BREEAM UK New Construction: Residential	Holistic residential sustainability assessment, formerly the Home Quality Mark	Covers wider environmental, social and economic quality rather than one Passivhaus-style energy threshold

These are therefore not five grades on one scale. Passivhaus and EnerPHit concentrate strongly on building physics and verified performance. BREEAM Residential is much broader. The Future Homes Standard is a legal Building Regulations regime rather than a voluntary certification scheme.

 

Passivhaus is not the Future Homes Standard

 

The Government published the final Future Homes and Buildings Standards package in March 2026. The Building Regulations amendments come into force on 24th March 2027, subject to transitional provisions. For ordinary non-higher-risk work, projects notified before that date can remain under the previous regime if the relevant building work is commenced before 24th March 2028.

The new standard requires low-carbon heating, high levels of energy efficiency and a new requirement for on-site renewable electricity generation in new dwellings and buildings containing dwellings.

At present, SAP 10.3 is the sole approved methodology for demonstrating domestic compliance. The Government delayed the Home Energy Model so that it could complete further assurance work; HEM is expected to become available alongside SAP later.

A certified Passivhaus must still separately comply with Building Regulations. Conversely, complying with the Future Homes Standard does not make a dwelling Passivhaus.

 

Can a local plan require Passivhaus?

 

This is where planning law becomes more complicated than the technical standard.

Policy PM13 of the August 2026 NPPF allows development plans to set energy-efficiency standards which go beyond current or proposed Building Regulations, but only where there is a clear and robustly costed rationale showing that the requirement will not adversely affect development viability and deliverability.

PM13 then says such standards should be expressed as a percentage uplift of the dwelling’s Target Emissions Rate, calculated using a specified version of SAP or another approved calculation methodology.

That means an authority can have a strong policy ambition for very-low-energy housing, and Passivhaus evidence may help demonstrate what can be achieved, but a simple local-plan rule saying every new home must obtain Passivhaus certification does not sit neatly with the way PM13 says mandatory energy-efficiency standards should be framed.

Always read the adopted local plan as well as national policy. Existing policies have their own wording and legal history, and transitional arrangements can matter.

 

Does Passivhaus help a planning application?

 

Yes, potentially – but the amount of weight depends on the actual planning case.

Policy CC2 of the 2026 NPPF expects relevant development proposals to use design approaches which conserve energy and resources. Policy DP3(5) says substantial weight should be given to outstanding or innovative designs which promote high levels of sustainability, or help raise design standards more generally, provided they are consistent with the overall form and layout of their surroundings.

A genuinely ambitious certified Passivhaus can therefore contribute useful sustainability evidence. It may also show that energy performance has shaped orientation, form, glazing, fabric and services from the beginning rather than being bolted on after the architecture was finished.

But DP3(5) does not say every Passivhaus receives substantial weight merely because it is Passivhaus. The policy still requires an outstanding or innovative design and the relationship with the form and layout of the surroundings remains important.

 

Passivhaus is not a shortcut to an isolated country house

 

This is particularly important for the so-called “Grand Designs” route. An isolated house relying on HO11(1)(e) must be truly outstanding architecture which helps raise rural design standards, significantly enhances its immediate setting and is sensitive to the defining characteristics of the local area.

Passivhaus performance can strengthen the sustainability case, but it does not replace those architectural and landscape tests. Our guide to outstanding and innovative design explains why DP3 and HO11 are separate planning arguments.

 

Passivhaus and existing or historic buildings

 

For existing buildings, EnerPHit provides a retrofit route where full Passivhaus performance would be unrealistic. Planning still needs to consider the consequences of the physical work: external insulation, replacement windows, roof alterations, plant, solar panels and changes to historic fabric may need planning permission or listed building consent.

The 2026 NPPF is positive about genuine energy improvements. CC2 gives substantial weight to the benefits of improving the energy efficiency of existing buildings where development is required, while heritage policy recognises energy-efficiency and low-carbon heating measures as potential public benefits. That does not remove the duty to assess harm to a listed building or conservation area.

 

When is Passivhaus unhelpful in planning?

 

The standard becomes unhelpful when it is treated as though it answers a different planning question. Common examples are:

• arguing that very low energy use makes an otherwise unacceptable location sustainable
• assuming Passivhaus certification automatically demonstrates outstanding architectural design
• using a PHPP result as a substitute for the SAP or other approved calculation required by a planning policy or Building Regulations
• designing solely around energy performance without responding to landscape, heritage or local character
• promising Passivhaus at application stage without showing how certification will be secured and verified

A planning application is stronger when Passivhaus is one coherent part of the design case, not the entire case.

 

If planning permission says the building must be Passivhaus

 

If a planning condition or legal obligation expressly secures a particular certification or performance standard, read its exact wording before changing the specification. The planning permission may require evidence at a particular design or construction stage rather than simply an intention to build efficiently.

Conditions must still satisfy the normal planning-condition tests, including necessity, precision and enforceability. Where Passivhaus is offered voluntarily as a material benefit, applicants should also be careful that later value engineering does not quietly remove the very benefit relied upon to secure permission.

 

Relevant standards, policy and guidance

 

• Passivhaus Trust – UK guidance, certification information and case studies
• AECB CarbonLite New Build Standard
• BREEAM UK New Construction: Residential – successor to Home Quality Mark
• National Planning Policy Framework, August 2026 – particularly PM13, CC2 and DP3
• Future Homes and Buildings Standards: Building Circular 01/2026
• Standard Assessment Procedure – current SAP and HEM position

 

Other Housing Sections

 

 

Passivhaus Planning Page Updated: 2nd September 2026