Ground rents, service charges and the value input
Ground rent income has largely gone from new long leases, and service charges quietly reduce the sales values an appraisal rests on. Both sit on the value side and both are easy to get wrong.
The ground rent value assumption used to be worth real money in a flatted development appraisal, and on new long residential leases it is now worth almost nothing. The Leasehold Reform (Ground Rent) Act 2022 restricts ground rents on most new long residential leases to a peppercorn, which removes a capitalised income line that appraisals written before it routinely carried. Service charges work the other way: they never appeared as income to the developer, and they quietly reduce the sales values the whole appraisal rests on.
Both inputs sit on the value side of a residual calculation, and both are easy to get wrong in a direction that favours whoever prepared it.
How income assumptions reach the appraisal
A residual appraisal builds gross development value from the units, and on a flatted scheme the value of a unit is the price a buyer pays for a lease with particular terms. Lease length, ground rent, service charge level and any restrictions all affect that price.
Three income-related lines historically appeared. The capitalised value of the ground rent stream, sold as an investment to a freehold investor. Any commercial element capitalised on a yield. And in a build to rent scheme, the whole asset valued on capitalised net operating income rather than on unit sales.
Only the first of those has been removed by reform. The others remain, and they behave differently from unit sales in ways that affect the affordable housing conclusion.
The ground rent position
For new long residential leases granted after the 2022 Act took effect, the permitted rent is a peppercorn, with limited exceptions. The practical consequence for appraisal work is that a ground rent capitalisation line in a current scheme is wrong unless the scheme falls into one of those exceptions and the report explains which.
Two follow-on points matter in viability discussions.
Appraisals prepared for an earlier scheme on the same site may carry the old line, and a benchmark land value derived from a transaction that assumed ground rent income reflects a value that can no longer be realised. Where transaction evidence predates the reform, adjust for it and say so.
Further leasehold reform has been enacted and is being brought into force in stages, covering lease extensions, service charge transparency and the sale of new leasehold houses. Check which provisions are in force at the date of your appraisal rather than assuming the position has settled, and state the date you checked.
Service charges and what they do to value
A high service charge reduces what a buyer will pay. Lenders test affordability including the charge, and a flat with a charge that looks out of line for its area sells more slowly and for less.
The drivers on a modern scheme are familiar: lifts, communal plant, concierge or on-site management, podium landscaping, car park ventilation, sprinkler and fire system maintenance, and the reserve fund contribution. Add an estate charge for adopted-in-name-only roads and drainage and the figure climbs further.
Designing the charge down is a real option and it belongs in the appraisal discussion rather than in the sales strategy alone. A single core serving more units, a simpler landscape specification, fewer mechanical systems and a drainage design that an undertaker will adopt all reduce the running cost. Those choices affect the layout, which means they have to be made early.
In an appraisal, the service charge shows up indirectly, through the sales values you adopt. A report that uses values from a comparable scheme with a materially lower charge, without adjustment, has overstated gross development value. State the assumed charge per square foot or per unit, state the comparable's charge, and show the adjustment.
Management, sinking funds and the long view
Reserve fund contributions are a legitimate part of the charge and their absence is a warning sign rather than a selling point. A scheme with no sinking fund will face a large demand when the lifts need replacing, and valuers increasingly look for it.
Where the scheme includes affordable housing, the registered provider will scrutinise the service charge carefully, because it has to be recoverable from residents on limited incomes and its own appraisal depends on it. A charge the provider considers unaffordable reduces what it will pay for the units, which flows straight back into gross development value and into the viability conclusion.
That link is worth stating explicitly in the Viability Assessment. An appraisal showing a policy compliant affordable offer as unviable, on sales values that assume a service charge the affordable provider has already said it will not accept, is internally inconsistent.
Investment sale against unit sales
Build to rent and block sales are appraised differently, and the difference is more than presentational.
| Unit sales | Investment sale | |
|---|---|---|
| Value derived from | Individual capital values | Capitalised net operating income |
| Ground rent | Peppercorn on new leases | Not applicable |
| Service charge | Reduces capital value | Appears as a cost in the net operating income |
| Sales period | Phased absorption over months | Single transaction on completion |
| Risk profile | Market exposure during sales | Yield and letting risk |
On a build to rent appraisal the gross-to-net ratio, the operating cost assumption and the yield do the work that sales values and absorption do on a for-sale scheme. The affordable housing conclusion can differ substantially between the two models on the same site, which is why authorities ask for the tenure to be fixed rather than left open.
If the scheme could go either way, present both and say which the applicant intends to pursue. A viability case built on the less generous model with no commitment to that tenure invites a review mechanism, and our note on affordable housing review mechanisms sets out how those are drafted.
Evidencing the assumptions
Every value-side assumption needs a source on the face of the appraisal.
- Sales values: comparable transactions with addresses, dates, areas and the service charge applying to each.
- Service charge: a managing agent's budget or a draft schedule by heading, not a round figure per square foot.
- Reserve fund: the contribution rate and the basis for it.
- Affordable values: the registered provider's offer or a stated bid assumption with the tenure mix it covers.
- Investment assumptions, where relevant: yield evidence, gross-to-net ratio and the operating cost build-up.
Viability assessments are expected to be published, so write them for a reader who disagrees with you. An Affordable Housing Statement that reconciles line by line with the appraisal is harder to attack than one that summarises it.
Viability work is a report type where councils expect a suitably qualified author, normally a chartered surveyor, and professional review is strongly advised. Where the position is contested, the arguments resurface at appeal, as our piece on when an inspector reopens viability describes.
This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it, and confirm which leasehold reform provisions are in force at the date you prepare the appraisal.
PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. For specialist technical reports, qualified professional input may be required.
Frequently asked questions
Can a viability appraisal still include ground rent income?
Only in the limited cases that fall outside the restriction. The Leasehold Reform (Ground Rent) Act 2022 limits the rent on most new long residential leases to a peppercorn, so a capitalised ground rent line in a current appraisal needs explaining by reference to a specific exception. Older appraisals and older transaction evidence may still carry the assumption.
How does a service charge affect gross development value?
Indirectly but materially. Lenders test affordability including the charge, and a flat with a charge out of line for its area sells more slowly and for less. If the comparable evidence used to set sales values comes from a scheme with a lower charge, the appraisal needs an adjustment and should show it rather than ignoring it.
Should a scheme include a reserve fund contribution?
Yes, and its absence is a weakness rather than a selling point. Without a sinking fund, residents face a large demand when lifts, roofs or plant need replacing. Valuers look for the contribution, and a registered provider taking affordable units will examine both the charge and the reserve before committing to a price.
Why does build to rent produce a different viability answer?
Because the value is capitalised net operating income rather than the sum of unit sales. The gross-to-net ratio, the operating cost assumption and the yield replace sales values and absorption rates. The affordable housing conclusion on the same site can differ substantially between the two models, which is why authorities ask for the tenure to be fixed.
What evidence should support the service charge assumption?
A managing agent's budget or a draft schedule broken down by heading, rather than a round figure per square foot. Include the reserve fund contribution rate and its basis. Where affordable units are involved, the registered provider's view on recoverability should be recorded, because an unaffordable charge reduces what the provider will pay.
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.