Site allocations: what an allocation does and does not grant

A site allocation in an adopted local plan establishes that the principle of development has been tested through examination and found sound. It does not grant planning permission, it does not fix the number of units, and it does not switch off any statutory constraint that applies to the land. What it does give you is the benefit of section 38(6) of the Planning and Compulsory Purchase Act 2004: the application must be determined in accordance with the development plan unless material considerations indicate otherwise, and the allocation is part of that plan.

That is worth a great deal on the principle and very little on the detail. Almost every refusal on an allocated site turns on the site-specific requirements in the policy, on access, or on a constraint the allocation never claimed to resolve.

Where allocations sit in the development plan

Allocations appear either in the local plan itself or in a separate site allocations document, sometimes supplemented by a neighbourhood plan that allocates smaller sites. All of those form part of the statutory development plan for the area.

Read the allocation as a policy rather than as a label on a map. It will usually have a reference, a stated use or mix of uses, an indicative capacity, a boundary on the policies map and a list of requirements. The supporting text explains the reasoning, and while it is not the policy, an inspector will read it.

Check the plan's adoption date and its end date. An allocation in a plan that has passed its horizon, or that was adopted against an earlier version of national policy, still forms part of the development plan, though the weight given to individual policies may be affected where they are out of date.

Why an allocation is not a permission

Permission comes from a planning application, or from permission in principle where the authority has entered a site on a brownfield register or granted it on application under the Housing and Planning Act 2016 route. Those are separate mechanisms with their own procedures, and permission in principle deals only with use, location and the amount of development, with everything else left to technical details consent.

An allocation tells you the council accepts the site should come forward. Your Planning Statement still has to demonstrate that this scheme, on this layout, with these access arrangements, complies with the rest of the plan.

Two arguments disappear once a site is allocated, which is the real practical gain. Prematurity falls away, because the plan has made the decision. And a settlement boundary or countryside protection policy no longer applies to land the plan has taken out of it.

Site-specific requirements and how they bind

The requirements listed in an allocation policy are the part that costs money. They commonly include a specified vehicular access, a highway improvement, land safeguarded for a school or health facility, retention of a hedgerow or tree belt, a green buffer to an adjoining settlement, a masterplan or design code, affordable housing at a stated proportion, and a requirement that the site is brought forward as a whole rather than in parcels.

They bind as policy. Failing one is a conflict with the development plan, which you then have to justify under section 38(6), and the council will normally secure the deliverable ones through conditions and a section 106 agreement. Where a requirement is expressed in the supporting text rather than the policy, say so, because the weight differs.

A whole-site delivery requirement is the one that most often derails a scheme, because it gives the council a reason to resist an application from one landowner on part of an allocation. Deal with it by showing how your parcel works with, and does not prejudice, the delivery of the rest: an indicative masterplan for the whole allocation, access that serves the remainder, and drainage and open space sized for the full site.

Capacity figures and whether they are ceilings

Most allocations state an indicative capacity, and most are drafted as approximate or minimum figures. National policy pushes toward making efficient use of land, so a higher number is arguable where the layout, amenity, parking and character tests are met.

Where you exceed an indicative figure, the affordable housing position changes with it. An Affordable Housing Statement has to work from the actual unit count and tenure mix, and where the increased number is what makes the scheme viable, a Viability Assessment prepared to the RICS approach is the document the council's consultant will interrogate.

Departing from the allocation boundary

Boundaries on a policies map were often drawn from a promoter's red line submitted years earlier, and they rarely match the site you can assemble. Development that extends beyond the boundary is assessed against whatever policy applies to the land outside it, which is usually a countryside or settlement boundary policy, and the allocation gives no cover there.

Where you need land outside the boundary, treat it as two cases in one application: the allocated part supported by the policy, and the additional part justified on its own merits. Officers respond better to that structure than to a red line that quietly crosses the line on the policies map.

Developing part of the allocation is generally easier than extending beyond it. Leaving part undeveloped is different again: if the untouched land is a requirement of the policy, such as a buffer or open space, that is compliance rather than under-delivery.

An allocation also does nothing about designations that sit on the land. A listed building, Flood Zone 3, a Tree Preservation Order, an area of ancient woodland or a protected species population all still bite, and habitats obligations apply at application stage even where the plan was screened. Sites in catchments affected by recreational pressure on European sites are the clearest example, as European sites, recreational pressure and greenspace explains.

Weight for allocations in an emerging plan

Weight for an emerging allocation depends on the stage the plan has reached, the extent of unresolved objections to the relevant policy, and how far the policy is consistent with national policy. The National Planning Policy Framework sets out that test, and the August 2026 edition reorganised the Framework around policy codes, so cite the current code and edition rather than a paragraph number from an older copy.

In practice, an allocation that has survived examination and is awaiting adoption carries real weight, while a site proposed in a draft plan at Regulation 18 stage carries little. Unresolved objections to your specific site matter more than objections to the plan generally.

Use the evidence base either way. The site selection assessment, the strategic transport modelling, the plan viability study and the infrastructure delivery plan were prepared by the council and are public, and quoting the council's own conclusions about a site is more effective than commissioning your own.

Enter your postcode on PlanScope to see which supporting documents an application on an allocated site is likely to need, and draft them against the allocation policy requirements.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.