Rural exception sites and the obligation that secures them

A rural exception site is a small site outside the normal pattern of development, released for affordable housing to meet a local need that has been evidenced at parish level, with occupancy tied down in perpetuity by a section 106 agreement. The policy is in the National Planning Policy Framework, and the current edition, published on 17 August 2026, is organised by policy codes rather than paragraph numbers, so check the wording of the relevant policy before you quote it.

The planning principle is straightforward. The agreement is where the work is, and where most of these schemes fail.

What an exception site is, and where policy allows one

The starting point is that the site would not otherwise be released for housing. It sits outside a settlement boundary, or is not allocated, and there is no general presumption in its favour. What justifies it is a demonstrated local affordable need that cannot be met within the settlement pattern.

Local plans usually add criteria: adjoining or well related to an existing settlement, proportionate in scale to that settlement, acceptable in landscape terms, accessible to at least a basic range of services. In a National Landscape or a National Park the landscape test carries more weight, and in the Green Belt an exception site is still inappropriate development unless very special circumstances are shown, which is a point applicants underestimate.

Read your authority's development plan policy first. Some authorities set a maximum number of dwellings, some define the distance from the settlement edge, and some have a separate community led housing policy with different criteria.

The local needs evidence

This is the foundation, and thin evidence is the most common reason for refusal. What holds up:

• a parish or neighbourhood level housing needs survey, recently carried out, with a stated methodology and response rate
• data from the local authority's housing register filtered to households with a connection to the parish
• evidence that the need is for the tenures and sizes proposed, not simply for "affordable housing" in the abstract
• an explanation of why the need cannot be met by existing stock, turnover of existing affordable homes in the parish, or sites within the settlement boundary
• where a rural housing enabler or the council's housing team has been involved, their written view

Match the schedule of accommodation to the survey. A survey showing demand for six two bedroom homes for rent does not support a scheme of eight three bedroom shared ownership houses, and an Affordable Housing Statement that glosses over the mismatch invites the housing officer to object.

Date the evidence. A needs survey more than about three years old will be questioned, and on a site that has been through a refusal and a redesign the survey often needs refreshing before resubmission.

Local connection criteria and the cascade

Occupancy is restricted to households with a connection to the area, defined in the agreement. Criteria in common use include current residence in the parish for a stated continuous period, employment in the parish, a close family connection to someone resident there, and former residency.

The cascade is what makes the restriction workable. If no qualifying household comes forward within a defined period, eligibility widens to adjoining parishes, then to a larger area, then to the district, each stage with a stated marketing period. Without a cascade the homes sit empty and the registered provider will not take them on.

Two competing pressures shape the drafting. The parish wants the tightest possible restriction, because that is the point of the scheme. The provider and its lender want enough flexibility that the homes can always be let or sold, because empty homes are unfunded debt. A workable agreement usually holds the first tier tight, keeps the marketing periods short, and makes the cascade automatic rather than dependent on the council's discretion.

In areas designated as rural under the relevant housing legislation, statutory rights to acquire can be disapplied, which affects whether homes can be lost from the stock later. Ask the housing team whether the parish is within a designated area, because it changes what the provider can accept.

How much market housing is allowed

National policy allows some market housing on an exception site where it helps to deliver the affordable homes. That is a means to an end, and the test is how much is needed rather than how much the landowner would like.

Councils generally require an open book appraisal. The Viability Assessment needs to show the scheme's costs, the value of the affordable units to a registered provider, any grant, and the residual position, with land taken in at exception site value rather than at open market residential value. That last point causes most of the arguments. A landowner expecting the value of an allocated housing site has misunderstood the policy, and an appraisal built on that expectation will be rejected.

Councils usually expect a suitably qualified author for viability work, and professional review is strongly advised. Where the appraisal is finely balanced, a review mechanism can bridge the gap, and the structures set out in viability review mechanisms transfer to a small rural scheme with the timings compressed.

The obligation that secures occupancy

The section 106 agreement is the scheme. It will typically cover the affordable tenure and mix, the local connection criteria and the cascade, a restriction on occupation to qualifying households in perpetuity, nomination arrangements with the council, restrictions on staircasing or disposal for shared ownership units, a prohibition on the affordable units being disposed of other than to another registered provider, and phasing tying the market units to delivery of the affordable ones.

Three clauses deserve attention before you sign.

The mortgagee exclusion clause, which allows a lender in possession to dispose free of the restrictions after a marketing period. Providers and lenders require some form of it. A clause drafted too widely can take homes out of the affordable stock permanently, and the negotiation is about the length of the marketing period and the order in which alternative buyers are approached.

The phasing clause, which stops the market units being built and sold while the affordable homes wait for funding. Tie occupation of the market units to practical completion of the affordable ones.

And indexation of any contributions, which behaves the same way here as on larger schemes, a point covered in deferred contributions and indexation.

Working with a registered provider or a community land trust

Find the partner before the application, not after. A registered provider brings a valuation for the affordable units, access to grant, management capacity and a view on whether your local connection drafting is fundable. A community land trust brings local legitimacy and a long term steward for the homes, and usually needs more support on funding and compliance.

Ask any prospective partner four questions early. Will you take these tenures at this size and in this location. What do you need the agreement to say. Are you applying for grant, and on what programme. And who manages the homes in year fifteen.

Why these schemes stall

Illustrative example of the pattern. A parish survey identifies a need for eight affordable homes. A landowner offers a paddock adjoining the village. The scheme comes forward as eight affordable and four market houses, with the appraisal showing the market units are needed. Then the registered provider withdraws because the connection criteria are too tight, the landowner will not accept exception site land value, and the application sits undetermined for a year before being refused on landscape grounds because the layout was never adjusted to the sloping field.

Each of those is avoidable. Agree the land value basis in writing before design fees are spent. Settle the connection criteria and cascade with the housing team and the provider before submission. Test the landscape case with an honest visual assessment at the layout stage. Establish whether biodiversity net gain can be delivered on site, since a greenfield exception site has a real baseline and the units have to come from somewhere. And check nutrient neutrality and drainage constraints at the outset, because either can add a cost the cross-subsidy cannot carry.

The schemes that get built are the ones where the agreement was drafted in parallel with the design, rather than after permission was resolved.

To see which reports a rural site is likely to need, enter the postcode on PlanScope and answer the guided questions.

This is general guidance rather than 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.