Employment land release: the evidence councils expect

Applications to release designated employment land succeed on marketing evidence and fail on design arguments. The employment land release evidence councils expect is narrow and specific: how long the site was marketed, at what price, through whom, to what audience, and what the enquiries showed. Everything else in the application is secondary, because the policy question is whether there is a reasonable prospect of the site being used for employment purposes.

That framing is worth accepting early. An applicant who arrives with a well designed residential scheme and 11 weeks of marketing will lose to an applicant with an ordinary scheme and two years of it.

Policy protection for employment land

Local plans protect employment sites in two ways. Designated employment areas carry policies resisting the loss of employment floorspace, usually with criteria that have to be met before release. Individual allocations carry their own wording.

National policy pushes in the other direction in one respect. Planning policies should avoid the long term protection of sites allocated for employment use where there is no reasonable prospect of a site being used for that purpose, and applications for alternative uses should be treated on their merits having regard to market signals. Check the wording in the current Framework published on 17 August 2026.

So the argument is rarely about whether the site can ever be released. It is about whether the evidence shows there is no reasonable prospect, and the local policy criteria are the checklist against which that is judged.

Read those criteria first and structure the whole submission around them. Most policies list three or four requirements, and an application that answers each in turn in the Planning Statement is far harder to refuse than one that makes a general case.

Marketing evidence and its duration

Duration is the first thing an officer checks, and local policy or a supplementary document usually specifies it. Twelve months is common, 18 or 24 months appears in tighter authorities, and some policies require continuous marketing rather than a total across broken periods.

Quality matters as much as length. The evidence should cover:

1. The agent instructed, their specialism in the relevant sector, and the date of instruction.
2. The asking rent or price, with the basis on which it was set and any reductions made during the period, with dates.
3. The channels used: property portals, sector publications, direct approaches to occupiers and agents, and a board on site.
4. The particulars issued, showing how the property was described and whether subdivision or refurbishment was offered.
5. A log of every enquiry and viewing, with the outcome and the reason given.
6. Any offers received and why they did not proceed.

The enquiry log is the document that persuades. Fourteen enquiries, nine viewings and three offers withdrawn on condition grounds tells a story. A statement that there was limited interest does not.

Marketing at an unrealistic price is the classic failure. An authority will obtain its own view, and a price materially above comparable evidence will be treated as marketing designed to fail.

Valuation and viability evidence

Where the argument is that continued employment use is not viable, the appraisal has to be capable of interrogation.

Provide the existing use value, the cost of bringing the building to a lettable standard, the achievable rent from comparable evidence, the yield applied, and the resulting value against the cost. Comparable transactions should be recent, local and close in type and size, with each one identified.

Where refurbishment is the issue, a condition survey supports the cost figures, and a Structural Survey is the document that carries it. Costs asserted without a survey are usually discounted.

A Viability Assessment prepared to the recognised professional standards will be reviewed by a consultant acting for the authority, so build it to be read by someone looking for optimism. Councils expect a suitably qualified author, and professional review before submission is strongly advised.

Employment land review findings

Authorities commission evidence about employment land supply and need, and that evidence is public. It is also frequently the most useful document in the applicant's case.

Look for the study's conclusions on the quality of the site in question, on the overall supply position against need, and on whether any site is identified as poor quality or suitable for release. Where the authority's own evidence describes the site as low quality, constrained or of limited market attraction, quote it.

Check the date. A study from an earlier plan period may have been superseded, and an authority defending a refusal will say so. Where the study is out of date and the position has worsened, say that too, with the evidence.

Where the loss of floorspace is significant in local terms, an Economic Impact Assessment quantifying the jobs lost and any jobs created by the proposal gives the officer something to weigh, and an Employment Land Assessment sets the site in the context of the wider supply.

Alternative uses and mixed schemes

A mixed scheme retaining some employment floorspace is easier to approve than a wholesale loss, and it changes the policy test from release to intensification.

Ground floor workspace under residential is the common formula. It works where the units are lettable in practice, which means adequate floor to ceiling height, separate servicing, a loading arrangement, acoustic separation from the homes above, and a size that matches local demand. Small units let more readily than one large one in most locations.

It fails where the workspace is a token. Three 30 m2 units with no servicing behind a residential lobby will sit empty, and officers have seen enough of those to recognise them. Where the re-provision is offered, expect a condition or an obligation securing its delivery, marketing and occupation, and expect the authority to resist a later application to convert it.

Conversion routes under permitted development interact with all of this. The prior approval route for commercial to residential has been amended more than once, including changes to floorspace limits and vacancy requirements, so check the current text of the Order. Authorities in employment areas have responded with directions removing those rights, which is why a search for local directions belongs at the start of any appraisal.

Where these applications come unstuck

Four patterns repeat, and none of them is about the merits of the replacement scheme.

The marketing period falls short of the policy requirement, or runs in broken blocks where the policy asks for a continuous period. The asking price sits above comparable evidence, so the authority treats the exercise as marketing designed to produce no interest. The viability appraisal contains costs with no survey behind them and rents with no comparables. And the application relies on a general assertion that industrial demand has fallen, without the authority's own evidence base to support it.

Each of those is fixable before submission and expensive to fix afterwards, because the marketing period cannot be run retrospectively. An applicant who discovers at week six of determination that the policy required 24 months has lost a year.

Start the marketing before the design work, not alongside it.

Structuring the submission

Lead with the policy criteria, answer each one, and put the evidence in appendices that are individually referenced.

A workable order is the policy test, the marketing evidence with the enquiry log, the viability position, the authority's own employment land evidence, the economic effects, the re-provision offered, and then the scheme itself. Design comes last, because it is the least relevant to the decision.

Offer the section 106 heads of terms early where re-provision or an employment and training commitment is proposed. Those negotiations take longer than the determination period, and the review mechanisms that sometimes attach are discussed in our note on overage clauses and review mechanisms in a section 106. Where the site also carries an affordable housing requirement, the interaction with the small sites threshold is set out in our piece on affordable housing and the small sites national threshold.

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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