Finding the local plan policies that apply to your site
Section 38(6) makes the development plan the starting point for every decision, so the first job on any site is assembling it accurately. Here is the order to work in and what weight each document carries.
To find local plan policies for a site you need three things in order: the name and date of the adopted development plan, the policies map entry for your red line, and any neighbourhood plan covering the area. Section 38(6) of the Planning and Compulsory Purchase Act 2004 requires applications to be determined in accordance with the development plan unless material considerations indicate otherwise, so that list is the backbone of every planning statement you will write. Supplementary documents, design codes and emerging plans matter too, and they matter differently.
What the development plan actually consists of
The development plan for a site in England is rarely one document. It usually comprises the adopted local plan or core strategy, any site allocations or development management policies document adopted separately, the minerals and waste local plan produced by the county or unitary authority, any made neighbourhood plan, and in London the spatial development strategy. Older unitary development plan policies that were formally saved when a newer plan was adopted also remain part of it until replaced.
Get the full list before you read anything. A statement that quotes a 2019 core strategy policy replaced by a 2024 allocations document looks careless, and an officer will say so in the report.
The authority's planning policy pages normally carry an adopted plan index with dates. Where the authority was reorganised, for example into a new unitary council, the plans of the predecessor districts often continue to apply to their former areas until a single plan is adopted. Check that specifically, because it catches out people working across a county boundary.
Reading the policies map for your red line
The policies map is the spatial half of the plan. Most authorities publish an interactive version, and the layers that matter to a small residential site are the settlement or development boundary, any site allocation, Green Belt, conservation area, local green space, employment land designations, flood zones and any local landscape designation.
Two habits save time. Zoom to the actual boundary of your site rather than the postcode centroid, because a red line that crosses a settlement boundary changes the policy test for the part outside it. And screenshot each layer with the site outlined, dated, for the statement appendix.
The national planning data platform brings some of these datasets together in one place, and it is the quickest way to confirm whether a designation exists at all. Local plan designations remain the authority's own data, so use the platform for the check and the authority's map for the citation. There is a related walkthrough on finding conservation area boundaries in the national dataset and another on checking Article 4 directions in the national dataset, which matters because an Article 4 direction can remove the permitted development right you were relying on.
Green Belt is worth its own check, since the boundary is drawn on the policies map rather than derived from a national dataset. The walkthrough on finding the Green Belt boundary for a site covers how to do it defensibly.
Neighbourhood plans carry full statutory weight
A made neighbourhood plan is part of the development plan. Its policies can be more specific than the local plan and, on design, housing mix, local green space and settlement boundaries, they are often the policies that decide small applications.
Find out whether one exists for the parish, whether it has been made or is still in preparation, and when it was made. A neighbourhood plan that is more than a few years old may have housing policies affected by the authority's current supply position, and a plan still at consultation stage is a material consideration rather than part of the plan.
Do not skip the neighbourhood plan because the site is in a town. Many urban forums have made plans covering frontages, shopfronts, tall buildings and basements.
Supplementary documents, design codes and standards
Supplementary planning documents sit outside the development plan and cannot introduce new policy, though they are material considerations and officers apply them closely. The ones that bite on residential schemes are householder design guides, residential design standards covering separation distances and garden sizes, parking standards, and any affordable housing or planning obligations document.
| Document | Part of the development plan | Typical weight |
|---|---|---|
| Adopted local plan | Yes | Determinative under section 38(6) |
| Made neighbourhood plan | Yes | Determinative under section 38(6) |
| Saved older plan policies | Yes, until replaced | As adopted |
| Supplementary planning document | No | Material, often applied strictly |
| Design code adopted as SPD | No | Material |
| Emerging local plan | No | Depends on stage and objections |
Check the adoption date of each supplementary document and whether it postdates the plan policy it supplements. A parking standards document from 2011 attached to a plan adopted in 2023 is still applied in many areas, and it is fair to point out where it conflicts with current national policy on sustainable transport.
How much weight an emerging plan carries
The Framework sets out the approach to emerging policy. Weight depends on the stage the plan has reached, the extent of unresolved objections to the relevant policies, and the degree of consistency with national policy. A plan that has been submitted for examination with no objection to the policy you are relying on carries meaningful weight. A regulation 18 consultation draft carries very little.
This cuts both ways. If the emerging plan proposes to allocate your site, say so and explain the stage. If it proposes to designate it as local green space, you need to deal with that rather than hope the officer misses it.
The Levelling-up and Regeneration Act 2023 provides for National Development Management Policies, which would sit alongside local plans and take precedence in the event of conflict. As at September 2026 the plan making reforms in that Act are being brought in by stages, so check the commencement position and the current status of any published National Development Management Policies before relying on them in a statement.
An illustrative worked check
Take a single plot behind a house in a village, promoted for one dwelling. The check produced: a 2021 adopted local plan with a housing policy and a design policy, a 2016 site allocations document with saved settlement boundary policies, a neighbourhood plan made in 2019 with a policy on backland development, a householder design guide from 2014 setting a 21 metre window to window separation, and the site half inside the settlement boundary.
That last fact reframed the whole application. The rear half of the plot sat in open countryside policy terms, so the dwelling was repositioned forward and the garden extended into the outer section. The design guide separation figure then set the depth of the plan. Neither point came from the national datasets.
Putting the list in the planning statement
Write the policy section as a table of the policies you rely on, in this order: development plan policies by document and number, then neighbourhood plan policies, then supplementary documents, then national policy, then emerging policy with its stage. Quote the operative wording of each policy rather than paraphrasing it, and keep the quotation short.
Then do the harder part. Take each policy and state how the proposal complies, or where it does not, why the balance still favours permission. An officer reading a planning statement wants to see the policies that count against the scheme addressed, because their absence is the first thing a committee member notices.
Cite the National Planning Policy Framework by edition. It was re-issued on 17 August 2026 with policy coded chapters replacing the older paragraph numbers, so check the current published text on gov.uk rather than copying a paragraph number from an older report.
Site constraints follow from the same exercise. If the policies map or the national flood data puts any part of the site in Flood Zone 2 or 3, a flood risk assessment becomes part of the pack, and the sequential approach applies within the site layout as well as across the district.
This is general guidance rather than legal advice. Check the position with your local planning authority or a qualified professional before relying on it.
Enter your postcode on PlanScope to see the designations picked up for your site and which reports they point to.
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Frequently asked questions
Is a supplementary planning document part of the development plan?
No. Supplementary planning documents sit outside the development plan and cannot introduce new policy, though they are material considerations and officers apply them closely. Householder design guides, parking standards and planning obligations documents fall into this category. Check the adoption date, because an older document attached to a newer plan can conflict with current national policy.
Does a neighbourhood plan override the local plan?
Neither overrides the other automatically. Both form part of the development plan, and section 38(6) requires the application to be determined in accordance with the plan as a whole. Where two policies conflict, the more recently adopted policy usually prevails on the point of conflict, and the decision maker resolves it in the planning balance.
How much weight does an emerging local plan carry?
It depends on the stage the plan has reached, the extent of unresolved objections to the relevant policies, and how consistent those policies are with national policy. A submitted plan with no objection to the policy in question carries meaningful weight. An early consultation draft carries very little, and should be described accurately in the statement.
What if my site straddles a settlement boundary?
Each part is assessed under the policy that applies to it, so the portion outside the boundary is treated as open countryside in policy terms. This commonly changes the layout, pushing built form into the inner section and garden or landscaping into the outer part. Zoom to the actual site boundary on the policies map rather than the postcode centroid.
Do old unitary development plan policies still apply?
Where they were formally saved when a newer plan was adopted, yes, until they are replaced. The authority's policy pages normally list which policies remain in force. After local government reorganisation, predecessor district plans often continue to apply to their former areas until a single plan is adopted for the new authority.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.