Site allocations: what an allocation actually gives you

An allocation in an adopted local plan establishes the principle that your site should be developed. It grants no permission at all. You still make a planning application, you still assemble the evidence base, and the council can still refuse you if the scheme fails the site-specific requirements the allocation attaches. Understanding that gap is the difference between a budget that holds and one that doubles.

Developers buy allocated land at a premium on the assumption that consent is a formality. It is not. What the allocation does is shift the argument from whether to how, and it fixes a set of obligations that are much harder to negotiate away than they would be on an unallocated site.

What an allocation does and does not grant

Section 38(6) of the Planning and Compulsory Purchase Act 2004 requires determination in accordance with the development plan unless material considerations indicate otherwise. An allocation is part of that plan. So the starting point for your application is that housing, or employment floorspace, or whatever the plan allocates the site for, is acceptable in principle in that location.

That is a real advantage. It removes the countryside protection argument, the settlement boundary argument and usually the loss-of-use argument. It does not remove the need for permission under section 70 of the Town and Country Planning Act 1990, and it does not pre-determine layout, access, density, mix, drainage or any technical matter.

Allocations also carry different weight depending on plan status. A site in an adopted plan carries full weight. A site in a submission draft awaiting examination carries limited weight, and an inspector may recommend its deletion. Buying on the strength of a draft allocation is a commercial judgement, not a planning certainty.

Reading the site-specific policy requirements

The allocation itself is usually two things: an entry in a schedule with a site reference, an area and an indicative capacity, and a short policy with a list of requirements. The list is where the money goes.

Read it as a procurement brief. A typical set of site specific policy requirements will name the access arrangement, the quantum of open space, a landscape buffer, a flood or drainage condition, an archaeological evaluation, a school contribution and the affordable housing percentage. Each line implies a report, a specialist, a programme and a cost.

Go further and read the plan's evidence base for that site: the strategic housing land availability assessment entry, the sustainability appraisal, the transport modelling and any site assessment proforma. Those documents explain why each requirement exists. If the requirement for a 20 metre landscape buffer came from a landscape sensitivity study, you argue with the study, not with the policy.

And check the policies map. Allocation boundaries drawn at plan scale often include land the promoter never controlled, or exclude a strip needed for visibility splays.

Infrastructure and phasing conditions in the allocation

Larger allocations frequently tie development to infrastructure delivery. The policy may say that no more than a stated number of dwellings shall be occupied before a junction improvement is complete, or that a primary school site must be transferred before a given phase.

These become Grampian conditions or obligations under section 106. The cost is only part of the problem. The timing is worse, because a highway improvement delivered under a section 278 agreement with the local highway authority sits outside your control and outside your programme. Build the lead time into the cash flow before you commit.

Where contributions are involved, you need to know what the council already collects and what it has spent. Authorities publish an annual infrastructure funding statement, and reading the one for your area tells you which projects are funded and which are still waiting. Our note on infrastructure funding statements and where the money went sets out how to read them. The same applies to section 106 monitoring fees, which are now a standard line in draft heads of terms.

Masterplan and design code requirements

Many allocations above roughly 100 units require an agreed masterplan or a design code before a reserved matters or full application is determined. Some require the masterplan to be adopted as a supplementary planning document, which brings its own consultation timetable.

This is the item that most often surprises a first-time promoter of an allocated site. A design code is a document of real length, prepared with the design team, tested with the council's urban design officer and sometimes with a design review panel. It takes months. If the allocation requires it, the application cannot be validated without it, and no amount of goodwill shortens the process.

Where the allocation sits across more than one ownership, the masterplan requirement also forces co-operation with parties who may have different timescales and different land values. Deal with that at the option stage.

Departing from the allocated capacity

Indicative capacity is indicative. The plan usually says "approximately" or "at least", and the two words behave very differently.

"At least 150 dwellings" is a floor. Coming in at 120 invites a refusal for under-using an allocated site, particularly where the council is struggling on supply. Our explainer on housing land supply and what it changes for applicants covers how that pressure plays out in decisions.

"Approximately 150 dwellings" gives room in both directions. Going materially above it is possible where the design justifies the density and the infrastructure requirements still work. You will need a clear design rationale, a daylight and amenity assessment that holds up, and a transport case that reflects the higher trip generation.

Where part of the site is constrained

Allocated sites are rarely clean. A corner in Flood Zone 3, a protected tree group, a gas main easement or a buried heritage asset reduces the developable area while the capacity figure stays where the plan put it.

The honest response is to show the constraint mapping early and explain how the capacity is still met on the remaining land, or why it cannot be. Surface water is the constraint that most often moves a layout, and checking it properly at the outset is worth the day it takes. Our guide to checking surface water and critical drainage areas locally explains where the data sits.

If a neighbourhood plan covers the site as well, its policies form part of the development plan and may add design or phasing requirements the local plan allocation does not mention. Check whether a neighbourhood plan covers your site before you fix the layout.

An illustrative example

Take an illustrative case: a 4.2 hectare allocation for approximately 110 dwellings, with a policy requirement for a single vehicular access from the classified road, a 15 metre landscape buffer to the north and retention of a hedgerow. Site investigation finds a shallow aquifer under the north-east third and the hedgerow holds a protected species record. The developable area drops to about 3.1 hectares. At 35 dwellings per hectare the scheme reaches roughly 108 units, so the capacity still works. Change the access requirement, though, and the internal road layout loses enough land to put the figure below 95. This example is illustrative only and the numbers are not from a real site.

Using the allocation in a planning statement

Structure the policy section of your Planning Statement around the allocation policy, taking each requirement as a sub-heading and answering it with the document that discharges it. Officers assess allocated sites against that list, and a statement that mirrors the list is far quicker to recommend.

Say plainly where a requirement is met in full, where it is met in a different way, and where it cannot be met. The third category is the one that needs the most work: a reasoned case, usually with evidence that the requirement was based on an assumption the site survey has disproved.

Cross-reference rather than repeat. The planning statement should point to the transport assessment, the drainage strategy and the ecology reports, not summarise them at length.

Enter your postcode on PlanScope to see which of the 66 reports an allocated site is likely to need before you commit to a programme.

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