Estate regeneration viability and existing resident costs

Estate regeneration viability fails on cost heads that a greenfield appraisal never encounters. Decant and temporary accommodation, leaseholder buyback at market value, statutory compensation to displaced residents, and a build programme stretched across phases because people are still living in the buildings you need to demolish. None of that appears in a standard residual appraisal template, and an assessment that omits it will be challenged by the council's own adviser within a fortnight.

The other difference is political. These appraisals get read by residents, by ward councillors and sometimes by the press, so the presentation has to survive an audience that is not primarily interested in benchmark land value.

Cost heads a greenfield appraisal never sees

Start by listing them explicitly rather than burying them in a contingency line. On a typical estate scheme the additions are decant and temporary accommodation, removal costs, home loss and disturbance payments, leaseholder acquisition, shared equity or shared ownership offers for returning leaseholders, resident liaison and independent advice, phased demolition with occupied neighbours, asbestos and other abnormal demolition costs, temporary services and site infrastructure, and the cost of holding empty homes during the decant period.

Void loss deserves its own line. A landlord stops letting homes years before demolition so the decant can proceed, and that lost rental income is a real cost of the scheme even though it never appears as a construction item.

Then there is the cost of time. Estate schemes run on longer programmes than their unit numbers suggest, because each phase depends on the one before it releasing homes. Finance costs compound accordingly, and a programme that slips a year on phase one slips a year on every subsequent phase.

Decant, temporary accommodation and phasing

The decant strategy is the appraisal. Where residents can move directly from an existing block into a completed new one, the scheme needs very little temporary accommodation and the cost falls away. Where the first phase has nowhere to build on, residents move twice and the cost roughly doubles.

So the phasing plan and the appraisal have to be developed together. Look for a site within the estate that can be developed first without displacing anyone, even if it produces fewer units than the optimum, because a single-move decant strategy usually beats a denser layout that needs a double move.

Temporary decant into private rented accommodation is the expensive option and it also generates the most resident opposition. Where there is no alternative, model it at realistic local rents for the full period rather than at an assumed average, and include the cost of two removals per household.

Land that sits empty between phases is an opportunity worth taking, and meanwhile use and temporary permissions can bring in some income and reduce the blight that empty blocks create.

Leaseholder buyback and equity arrangements

Leaseholders who bought under the right to buy are usually the largest single cost variable. Acquisition is at market value, and market value on an estate scheduled for regeneration is itself contested, because the announcement of the scheme affects values in both directions.

Where acquisition is by agreement, the price is negotiated. Where a compulsory purchase order is used, the compensation code applies and value is assessed disregarding the effect of the scheme itself. Model both, because the negotiated route usually costs more per unit but avoids the delay and the inquiry costs of the compulsory route.

Returning leaseholders are commonly offered shared equity in a new home, which lets a household with insufficient equity to buy outright stay on the estate. That offer has a cost to the scheme equal to the retained equity, and it also creates a long-term interest that has to be managed. Set out the offer and its assumed take-up rate in the appraisal, and test the sensitivity, because take-up is hard to predict and the cost moves with it.

Statutory compensation and disturbance

Displacement triggers statutory entitlements under the Land Compensation Act 1973. Home loss payments are due to residential occupiers displaced from a dwelling they have occupied for the qualifying period, and disturbance payments cover the reasonable costs of moving.

The amounts and the qualifying conditions are set by regulations and are revised, so take the current figures from the regulations rather than from a previous scheme's appraisal. Basic and occupier loss payments apply to other interests, with their own rules.

These are statutory entitlements rather than negotiable contributions, so they belong in the cost plan as a firm line. What varies is the number of qualifying households, which depends on the tenure profile at the point of displacement, and that profile changes during the years a scheme takes to come forward.

Replacement floorspace obligations

Most councils with estates have a policy position on replacement. In London, the London Plan sets an expectation of no net loss of affordable housing floorspace where existing affordable homes are demolished, measured by floorspace rather than by unit count, with replacement at equivalent rent levels.

Floorspace measurement matters. Older estate flats are often generously sized by current standards, so replacing 100 flats with 100 flats can still lose floorspace, and a scheme that meets the unit test can fail the floorspace test. Check which test the relevant policy uses before fixing the mix.

The Affordable Housing Statement has to set out the existing tenure and floorspace, the proposed equivalent, and how existing residents' rents are protected on return. Where the replacement is at a different rent level from the original, expect that to be the central issue at committee rather than the overall unit numbers.

Ballots, consultation and programme risk

Where public funding is involved, resident ballots may be a condition of that funding, and a ballot is a programme risk that cannot be mitigated by design. It also shapes the offer, because the landlord's commitments to residents have to be settled before the vote and then honoured afterwards.

Build the consultation into the timetable rather than running it alongside the application. A Statement of Community Involvement for an estate scheme is a substantial document covering years of engagement, the resident offer, how objections were addressed and what changed as a result.

The honest position is that a proportion of residents will oppose the scheme whatever the offer, and an appraisal that assumes full cooperation on decant timing is optimistic. Model a slower decant as a sensitivity.

Presenting the appraisal so it can be tested

National guidance starts from a presumption that viability evidence is made publicly available. On an estate scheme that is not a formality, because the audience includes the people being displaced.

Write it accordingly. State the benchmark land value and how it was derived, list the estate-specific cost heads separately rather than inside a contingency, show the phasing assumptions and the decant strategy they depend on, and give the sensitivity analysis for the variables that actually move the answer, which are usually leaseholder take-up, decant duration and sales values.

A Viability Assessment that hides the resident costs inside a single abnormals line invites the criticism that the numbers were built backwards from a desired outcome. Setting them out openly is both more defensible and, in practice, more persuasive.

Where the assessment supports a lower affordable housing contribution than policy requires, expect a review mechanism. Negotiate the trigger points and the sharing arrangement at the same time as the headline offer, because a review with an unrealistic trigger is worse for both sides than no review at all.

This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. Viability assessment is work councils expect a suitably qualified author to carry out, and professional review is strongly advised. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.

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