Vacant building credit and how councils apply it

The vacant building credit reduces the affordable housing contribution on a site where a vacant building is brought back into use or demolished for redevelopment. National planning guidance sets it out: the developer should be offered a financial credit equivalent to the existing gross floorspace of the relevant vacant buildings, to be set against the affordable housing requirement for the scheme. It is guidance, not statute, and the two words that decide most cases are "vacant" and "abandoned".

Where the credit comes from and what it says

The credit was introduced by a written ministerial statement in November 2014 and now sits in the Planning Practice Guidance on planning obligations. Its purpose is to remove a disincentive to bringing empty buildings back into use, on the reasoning that redevelopment of a vacant building generates no additional need for affordable housing in respect of the floorspace already there.

The policy survived a challenge. In R (West Berkshire District Council) v Secretary of State for Communities and Local Government (2016) the Court of Appeal upheld the ministerial statement as a lawful expression of national policy, while confirming that it is a material consideration to be weighed rather than a rule that displaces the development plan.

That distinction is the whole of the practical argument. Under section 38(6) of the Planning and Compulsory Purchase Act 2004 the adopted plan comes first, and guidance is a consideration that may indicate otherwise.

The vacancy and abandonment tests

The guidance excludes buildings that have been abandoned. It does not define abandonment, so the ordinary planning meaning applies, and that comes from a line of cases including Trustees of the Castell-y-Mynach Estate v Secretary of State for Wales (1985). Four factors are weighed:

• the physical condition of the building
• the length of the period of non-use
• whether there has been any intervening use
• evidence of the owner's intention

None of these is decisive on its own. A structurally sound warehouse empty for three years while the owner marketed it for letting is vacant. A roofless building open to the weather for 15 years with no marketing and no maintenance is abandoned, and it earns no credit.

Some councils also treat deliberate vacancy as disqualifying, on the basis that a landlord who empties a building to claim the credit should not benefit. The guidance does not say that in terms, and it is a live argument in many places.

Calculating the credit

The mechanism is proportional, not a cash deduction. You express the existing vacant floorspace as a proportion of the proposed floorspace, and reduce the affordable housing requirement by that proportion.

Here is an illustrative worked example, for method only. A site has a vacant 1,000 square metre office. The proposal is 4,000 square metres of residential floorspace. The local plan requires 30 per cent affordable housing. The credit is 1,000 divided by 4,000, so 25 per cent of the scheme is credited. The affordable housing requirement applies to the remaining 3,000 square metres, giving an effective requirement of 30 per cent of 3,000 rather than of 4,000.

Three points about the method. Use gross internal or gross external floorspace consistently across both figures and say which. The credit applies to floorspace, so a scheme that increases footprint but not floorspace behaves differently from one that goes up. And where the affordable housing policy is expressed in units rather than floorspace, the translation between the two is itself a negotiation, and it is worth agreeing the basis at pre-application stage.

Evidence a council will require

Expect to prove vacancy rather than assert it. The usual pack includes marketing evidence covering the relevant period with the agent's particulars and the asking terms, business rates records showing the empty rate position, utility records, dated photographs inside and out, and a statement of the building's condition.

Where the building was occupied by the applicant's own business until recently, the council will look closely at the sequence. Where it was let, copies of the lease and the surrender or expiry documentation matter.

Set the evidence out in the Affordable Housing Statement rather than burying it in a viability appendix, because affordable housing officers and viability consultants are usually different people reading different documents.

Where local policy resists the credit

A good number of authorities have adopted local plan policies that disapply or restrict the credit, typically by requiring a minimum period of continuous vacancy, by excluding buildings vacated within a set period before the application, or by declining to apply it to buildings in active use at any point in the preceding years.

Whether that is lawful depends on whether the policy was found sound at examination and how it is worded. A policy that has been through examination and adoption carries the statutory weight of the development plan, and national guidance does not automatically override it.

The practical approach is to check three documents before you assume a credit: the adopted local plan policy on affordable housing, any affordable housing or planning obligations supplementary planning document, and the authority's published committee reports on recent schemes where the credit was raised. Reading comparable determinations is a research task in itself, and the council's own planning register is the place to do it.

How the credit interacts with viability evidence

The credit and a viability case are separate arguments that are often run together, and confusing them weakens both.

The credit is a policy entitlement applied to the affordable housing requirement before viability is considered. A Viability Assessment then tests whether the residual requirement can be delivered while leaving a competitive return, applying the standard approach in national guidance and, in practice, the RICS professional statement on financial viability in planning.

Run them in that order and the arithmetic is clean. Run them together and you invite the council to argue that the credit has been double-counted, which is the single most common objection to a credit claim. Viability assessments are normally expected to be published, and they are scrutinised, so the sequence needs to be legible on the page.

What appeal experience indicates

Appeal decisions are not binding precedent, and they are indicative of how inspectors have approached the issue. Two patterns recur in the reported decisions.

Where the building is plainly vacant and the local plan is silent, the credit is generally applied without much difficulty. Where the local plan contains an adopted policy limiting the credit, inspectors have tended to give that policy the weight section 38(6) requires.

The lesson for a developer is that the argument is usually won or lost on the development plan, not on the national guidance. Citing national policy accurately matters here, and the move to policy codes in the National Planning Policy Framework published on 17 August 2026 means older citations need checking, as our note on citing the NPPF after the move to policy codes explains. Keep an eye on the planning law timeline for changes to the obligations regime.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it.

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