Local plan allocations as constraint and opportunity
Allocation policies come with requirement schedules that are development plan policy in their own right. Here is how to read them before you buy or draw anything.
A site allocation in a local plan settles the principle of development and almost nothing else. The policy that allocates it usually comes with a list of site specific requirements, and those requirements are development plan policy in exactly the same way that a general design policy is. An applicant who treats the allocation as permission in waiting and ignores the schedule attached to it will get a refusal, and it will be a refusal that is hard to appeal because the conflict is with the plan itself.
Read the allocation policy, the site schedule and the evidence base behind them before you draw anything. All three are public, and together they tell you what the authority expects the site to deliver.
What an allocation commits you to
The allocation does three things. It establishes that the plan supports development of the stated type on that land. It normally states an indicative capacity or floorspace. And it attaches requirements that have to be met for a scheme to accord with the plan.
Those requirements are not guidance. Section 38(6) of the Planning and Compulsory Purchase Act 2004 requires determination in accordance with the development plan unless material considerations indicate otherwise, and the allocation policy is part of that plan.
What the allocation does not do is guarantee permission, fix the capacity as a minimum or a maximum, or remove the need for the scheme to satisfy every other policy. A scheme on an allocated site still has to pass design, amenity, highway, heritage and environmental tests, and allocations are refused on those grounds regularly.
Site specific requirements written into policy
The requirements vary by plan, but the recurring ones are predictable enough to price at acquisition stage.
- A specified access point, often with a highway improvement attached.
- Affordable housing at a stated proportion and tenure mix.
- Land reserved for a school, a health facility or public open space.
- Green infrastructure, buffer planting or a defined landscape edge.
- Retention of specified trees, hedgerows or heritage features.
- Mitigation for a known constraint such as flood risk, contamination or noise.
- A requirement for a masterplan or design code to be approved before or alongside the first application.
- Phasing tied to delivery of infrastructure.
Take the masterplan requirement seriously. Where the policy says a masterplan covering the whole allocation is required, an application for part of it without one is vulnerable, particularly where the land is in more than one ownership.
Masterplans, design codes and what they actually control
A design code adopted as a supplementary document carries weight as a material consideration. One adopted as part of the plan carries more. Establish which you are dealing with, because the answer changes how much room there is to depart from it.
Codes typically fix street hierarchy, block structure, frontage types, storey heights, materials palettes and parking approach. The practical effect is that the design freedom sits at the plot level rather than at the layout level, which suits some developers and frustrates others.
Where the allocation spans several ownerships, the masterplan is also the document that allocates the burden. Who builds the spine road, who provides the attenuation, who transfers the school site. Get that settled through a collaboration agreement before the application, because trying to resolve it through parallel applications is slow and expensive.
Infrastructure phasing and the conditions that follow
Phasing requirements usually turn into conditions or obligations tied to occupation triggers. No more than a stated number of dwellings occupied before the access is complete. No occupation of a later phase before the open space is transferred.
Negotiate the triggers hard, because they drive cash flow far more than the headline contribution figures do. A trigger set at the fiftieth occupation on a scheme that will deliver forty units a year is very different from one set at the hundredth.
Where the allocation sits in a catchment with a wider environmental constraint, phasing can stall entirely regardless of what the plan says. Nutrient and water constraints are the clearest example, and the arithmetic involved is set out in water neutrality and how a scheme proves it.
Departing from an allocation
Three departures come up repeatedly, and they carry different levels of risk.
Changing the use is the hardest. An application for housing on an employment allocation conflicts with the plan's strategy, attracts departure publicity and usually needs evidence that the allocated use is undeliverable.
Exceeding the indicative capacity is the easiest, provided the scheme performs on design, amenity and infrastructure. Indicative figures are exactly that, and plans generally say so.
Bringing forward part of an allocation ahead of the masterplan sits in between. It can work where the part is self-contained and does not prejudice the rest, and it fails where it takes the easy land and leaves the constrained land undeliverable.
In each case, address the conflict directly in the planning statement rather than hoping the officer will not notice. Name the policy, state the extent of the departure and set out the considerations relied on.
Evidence an allocated site still needs
The allocation was tested at a strategic level. The evidence behind it, the sustainability appraisal, the habitats assessment, the transport modelling and the plan-wide viability testing, was prepared to support the plan rather than to support your application.
So the site still needs its own surveys: ecology and a biodiversity baseline, arboriculture, ground investigation, drainage, transport, heritage and archaeology where relevant. The plan evidence is useful context and occasionally a useful shortcut, but it is not a substitute.
Viability is the one people most often get wrong. Plan-wide viability testing at examination establishes that the policy requirements are deliverable across the plan area in general. It does not establish that they are deliverable on your site, and it does not prevent you making a site specific case. If you intend to, the viability assessment needs to be prepared to the recognised professional standard and reviewed by a suitably qualified author, because the authority will appoint its own reviewer.
Reading the site schedule
Most plans carry a schedule or appendix listing every allocation with its policy reference, area, indicative capacity and requirements. It is usually the most useful page in the document and the least read.
Work through it in this order.
- Find the policy reference and read the policy in full, including any cross-references.
- Note the site area against the actual title boundary, because they often differ.
- List every requirement as a separate line, with a cost and an owner.
- Check the plan's delivery trajectory for when the site was assumed to come forward.
- Read the examination inspector's report for anything said about this allocation.
- Check whether any of the requirements have been superseded by a later document.
That last step matters more as a plan ages. Where the plan is old enough that its policies are out of step with national policy, the weight attaching to the requirements can reduce, though the allocation's support for the principle usually survives. You can check the wider document set against the 66 report types by category once the requirement list is built.
Enter your postcode on PlanScope to see which reports an allocated site is likely to need.
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.
Frequently asked questions
Does an allocation guarantee planning permission?
No. It establishes that the plan supports development of the stated type on that land, and it normally states an indicative capacity. The scheme still has to satisfy the site specific requirements in the allocation policy and every other policy in the plan. Allocated sites are refused on design, amenity, highway and environmental grounds regularly.
Are site specific requirements binding?
They are development plan policy, so section 38(6) of the Planning and Compulsory Purchase Act 2004 applies to them in the same way as to any other policy. A scheme that ignores them conflicts with the plan, which makes both the refusal and the appeal harder to argue against than a conflict with general guidance would be.
Can I exceed the indicative capacity in an allocation?
Often, yes. Indicative figures are exactly that, and most plans say so. The argument turns on whether the scheme still performs on design, amenity, parking and infrastructure at the higher number. It is the least risky of the common departures from an allocation, and considerably easier than changing the allocated use.
Do I still need surveys on an allocated site?
Yes. The evidence behind the allocation was prepared at a strategic level to support the plan, not your application. Ecology and a biodiversity baseline, arboriculture, ground investigation, drainage, transport, heritage and archaeology all still need site specific work. Plan evidence is context and occasionally a shortcut, never a substitute.
Does plan-wide viability testing settle my site's viability?
No. Testing at examination establishes that the policy requirements are deliverable across the plan area in general. It does not establish deliverability on a particular site and does not prevent a site specific case. Any such case needs to be prepared to the recognised professional standard, because the authority will appoint its own reviewer.
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.