Ridge and furrow: planning, archaeology and heritage

 

Those long, regular humps running across an old pasture are not always just uneven ground. Ridge and furrow can be the surviving earthworks of centuries of cultivation, sometimes preserving the shape of medieval open fields and the way land was farmed long before modern field boundaries appeared.

For planning purposes, the important point is that ridge and furrow is not automatically a designated heritage asset and it does not carry a blanket ban on development. Its significance has to be assessed. A well-preserved medieval system with strong landscape or archaeological associations may be an important non-designated heritage asset, while exceptional examples can form part of a scheduled monument.

If ridge and furrow survives on a development site, deal with it early. The August 2026 National Planning Policy Framework expects archaeological significance and potential effects to be understood before the decision is made, with preservation in situ where feasible.

 

What is ridge and furrow?

 

Ridge and furrow is a pattern of parallel banks and hollows created by repeated ploughing. The banks are the ridges and the lower channels between them are the furrows. Over time, repeated cultivation moved soil towards the centre of each strip and produced the corrugated surface that can still be visible today.

The Forestry Commission’s 2026 guidance explains that ridge and furrow can preserve evidence of agricultural activity from prehistoric to post-medieval periods. The form can help with dating:

• Prehistoric cord rig normally has narrow ridges, often around 1 to 1.5 metres wide, and is rare
• Medieval ridge and furrow often has a curved or reversed S or C shape when viewed from above, with ridges sometimes much wider
• Post-medieval examples are usually straighter and narrower, including earthworks associated with horse and later steam ploughing

Do not assume that every corrugated field is medieval. Modern drainage, cultivation, former beds, water-meadow features and more recent ploughing can create patterns that look similar. Dating and significance are evidence-based questions.

 

Why can ridge and furrow matter to a planning application?

 

Ridge and furrow can be both an archaeological feature and part of the wider historic landscape. It may show how a medieval settlement organised its open fields, preserve former furlongs and headlands, or survive alongside hollow ways, deserted settlement earthworks, field boundaries or other archaeology.

Historic England’s Worcestershire research found that surviving ridge and furrow had been lost through agricultural change, equestrian uses, farm diversification, waste management, housing and road development. That does not make every surviving example nationally important, but it does explain why condition, rarity and survival increasingly matter.

The 2026 Forestry Commission guidance gives a useful set of factors for assessing importance: legal status, form, date, survival and condition, rarity, association with other heritage features, setting, historic landscape character and sense of place. Although that guidance is written for forestry proposals rather than ordinary planning applications, those factors are helpful when considering heritage significance.

 

Is ridge and furrow a heritage asset?

 

Sometimes. The NPPF defines a heritage asset as a building, monument, site, place, area or landscape identified as having a degree of significance meriting consideration in planning decisions because of its heritage interest. Ridge and furrow can fall within that definition where the evidence justifies it.

In practice there are three broad possibilities:

• The earthworks are of limited significance and are not identified as a heritage asset
• The earthworks are a non-designated heritage asset, often because of archaeological or historic landscape interest
• The ridge and furrow forms part of, or is associated with, a nationally important archaeological site that is scheduled or is considered to have equivalent significance

Designation therefore matters, but absence from the National Heritage List does not mean the earthworks are irrelevant. Equally, the presence of ridge and furrow does not turn the whole field into a protected monument by default.

 

The August 2026 NPPF tests

 

The current NPPF changed the structure and numbering of national heritage policy. For ridge and furrow planning, three policies are particularly important.

HE5: Assessing effects on heritage assets requires proposals affecting heritage assets to be accompanied by a proportionate assessment of significance, including any contribution made by setting. The relevant Historic Environment Record should be used and, where a proposal involves or may involve a heritage asset with archaeological interest, an appropriate desk-based assessment and, where necessary, a field evaluation should be undertaken.

HE7: Decisions on non-designated heritage assets says proposals with a positive effect should be supported. Where a proposal would harm significance, that harm should be weighed against the benefits using a balanced judgement, having regard to the scale of harm or loss and the significance of the asset. Where substantial harm or total loss is proposed, support should only be given where the harm or loss is outweighed by the benefits. A non-designated archaeological asset considered to be of equivalent significance to a scheduled monument is instead treated under the policies for designated heritage assets.

HE10: Loss or removal of heritage assets says heritage assets with archaeological interest should be preserved in situ where feasible. Where preservation or management on site is not possible, appropriate provision should be made for investigation, understanding, recording, dissemination and archiving by suitably qualified people or organisations.

This is why a condition to record the earthworks is not automatically the answer. First the decision-maker needs enough information to understand significance and decide whether the proposed loss is acceptable at all. Our wider guide to heritage significance and harm explains how that planning balance works.

 

How do you find out whether ridge and furrow is present?

 

A walk across the site is useful, but it is only one part of the evidence. Ridge and furrow can be much easier to recognise from above or in low-angle light. Useful sources include:

• The local Historic Environment Record (HER)
• Historic England’s Aerial Photo Explorer and other historic aerial photographs
• LiDAR data, which can reveal subtle earthworks even where vegetation makes them hard to see on the ground
• Historic maps and enclosure evidence
• The National Heritage List for England where scheduled archaeology may be involved
• The Forestry Commission’s Land Information Search, which now includes a Ridge and Furrow Areas constraint layer

The Forestry Commission guidance notes that modern LiDAR can provide a permanent record of less important earthworks in some forestry cases. For a planning application, however, the scope of any survey should be agreed in light of the development proposed and the local archaeological advice.

Our main archaeology and planning page explains HER searches, desk-based assessments, geophysics and trial trenching in more detail.

 

What development can harm ridge and furrow?

 

The obvious impact is levelling the site for buildings or roads, but earthworks can be damaged by much smaller interventions. Potential effects include:

• Cut and fill, regrading or soil stripping
• Foundations, roads, hardstanding and service trenches
• Drainage works and attenuation features
• Intensive landscaping or bund construction
• Repeated trafficking by heavy machinery
• Changes in land management that flatten or erode surviving earthworks

Where the earthworks are significant, the best solution may be to use them as a design constraint rather than treating them as an obstacle to be removed. Open space, landscaping or lower-impact parts of a scheme can sometimes be arranged to preserve the strongest surviving areas.

Remember that setting can matter as well. A development might leave the physical ridges untouched but still change the ability to understand them as part of a historic settlement or field system. That will depend on the particular asset and evidence, not on a standard buffer distance. See our guide to the setting of a heritage asset.

 

Does farming or forestry need planning permission because of ridge and furrow?

 

Not simply because ridge and furrow exists. Agricultural cultivation is not automatically brought into planning control by the presence of earthworks, and forestry has its own regulatory system. The important distinction is between the planning status of the proposed works and the heritage significance of the land affected.

For forestry, the government’s dedicated Ridge and furrow guidance for forestry in England applies to woodland creation and management, felling, restocking, agroforestry, forest roads and quarries. It encourages important earthworks to be identified, assessed and protected, and says important medieval ridge and furrow in grassland may be unsuitable for woodland creation.

Where a proposal relies on agricultural or forestry permitted development rights, do not assume the heritage issue disappears. The particular GPDO class, any prior-approval requirement, environmental assessment rules and separate heritage controls still need to be checked.

For the wider planning rules affecting rural land and buildings, see the Agriculture & Equestrian hub.

 

What if the ridge and furrow is scheduled?

 

Some important sites containing ridge and furrow are legally protected as Scheduled Monuments, often because the field system forms part of a wider archaeological complex. Historic England’s list entries include examples where medieval ridge and furrow survives with deserted settlements or earlier archaeology.

If the works would affect a scheduled monument, planning permission is not the only issue. Works caught by the Ancient Monuments and Archaeological Areas Act 1979 can require Scheduled Monument Consent. That is a separate consent regime and should be checked before any ground disturbance takes place.

 

What should an applicant do?

 

If visible or mapped ridge and furrow falls within a development site, a sensible sequence is:

1. Check the HER, National Heritage List, local plan and council constraint mapping
2. Walk the site and obtain good photographs, including views that show the earthwork pattern
3. Review aerial photography and LiDAR where available
4. Ask the council’s archaeological adviser whether the earthworks are already recorded and how they are regarded locally
5. Commission a proportionate heritage or archaeological assessment where the evidence justifies it
6. Use the assessment to influence layout before the design is fixed
7. Where loss is proposed, explain why it is necessary and how the NPPF HE7 or designated-asset balance is satisfied
8. Where recording or investigation is required, agree a suitable Written Scheme of Investigation and archive arrangements

For a scheme affecting several heritage interests, it may be more efficient to cover ridge and furrow within a wider Heritage Impact Assessment rather than commissioning disconnected reports.

 

Common misunderstandings

 

“Ridge and furrow is protected, so you cannot build on it.”
Too simple. Some examples are highly significant, but significance and planning weight vary. The correct response depends on evidence, designation, condition, rarity, associations and the harm caused by the proposal.

“It is not scheduled, so it does not matter.”
Wrong. Non-designated archaeology can still be a heritage asset and a material planning consideration under HE7.

“If we record it before construction, loss is automatically acceptable.”
No. HE10 makes clear that the ability to record evidence is not itself a decisive reason to approve loss. Significance and the planning balance come first.

“Ridge and furrow means the site is medieval.”
Not necessarily. Prehistoric cord rig and post-medieval cultivation systems also exist, while some modern landforms can mimic ridge and furrow.

 

Key sources and further reading

 

• Forestry Commission: Ridge and furrow guidance for forestry in England – published February 2026 and updated June 2026
• Historic England: Introductions to Heritage Assets – Field Systems
• Historic England: A Resource Assessment of Ridge and Furrow – Challenges for Conservation in Landscapes of Change
• National Planning Policy Framework, August 2026 – particularly HE5, HE7 and HE10
• Planning Practice Guidance: Historic environment – general guidance on significance, archaeological interest and decision-making; check its older NPPF references against the August 2026 Framework
• Ancient Monuments and Archaeological Areas Act 1979 – relevant where ridge and furrow forms part of a scheduled monument

Conservation, Heritage & Protected Sites

 

Ridge and Furrow Planning Page Published: 24th August 2026