Discount market sale as an affordable housing product
Discount market sale is a market home sold below open market value with the discount preserved on resale. The drafting is what decides whether it still works in 2050.
Discount market sale is an affordable home ownership product: a market house sold at a fixed percentage below its open market value, with the discount preserved on every subsequent sale by a restriction binding the land. It sits inside the national definition of affordable housing, which is why it can count towards an affordable housing requirement, and it is the product developers reach for when a registered provider will not take the units.
The national glossary definition sets the shape. A discount of at least 20 per cent below local market value. Eligibility determined with regard to local incomes and local house prices. And provisions in place to keep the housing at a discount for future eligible households. Check the exact wording in the current edition of the Framework, because the glossary has been revised more than once.
Where the product sits in the affordable definition
Affordable housing in national policy covers homes for rent that meet defined conditions, and routes to home ownership including shared ownership, discounted market sale and equity loan products. Discount market sale is the simplest of the ownership routes to understand and the hardest to get right on paper.
Simple, because the buyer owns the freehold or a long lease outright and pays no rent on a retained share. Hard, because everything depends on drafting that will still work when the third owner sells to the fourth in 2050 and the original parties are long gone.
First Homes is a distinct discounted market sale product introduced through a written ministerial statement in 2021, with a minimum discount, regional price caps and income eligibility caps set nationally. Those figures have been revisited since. Take them from current guidance rather than from a section 106 precedent you used two years ago.
How the discount is set and maintained
The discount is a percentage off open market value, and the two words doing the work are "open market".
The obligation has to define open market value as the value of the property with vacant possession, disregarding the affordable housing restrictions themselves. Without that disregard you get a circular valuation: the restricted value is lower, the discount is applied to the lower figure, and the effective discount shrinks with every transaction until it disappears.
The valuation mechanism should name who values, on what basis, at whose cost, and what happens on a disagreement. A RICS registered valuer instructed by the seller, with the authority entitled to require a second valuation and a referral to an independent valuer appointed by the president of the relevant professional body, is the usual structure.
Maintenance is done twice over. The obligation binds the land under section 106 of the Town and Country Planning Act 1990. And a restriction is entered on the title at the Land Registry so that no disposal can be registered without a certificate of compliance. The second is what actually stops a non-compliant sale, because conveyancers read the title.
Eligibility and local connection
Eligibility criteria typically combine three things: a first time buyer or housing need test, an income cap, and a local connection.
Local connection is usually expressed as a cascade. Residence or employment in the parish, then the district, then the county, then anywhere. Each tier gets a defined marketing period before the next opens.
The cascade needs a floor. If no eligible buyer comes forward after the whole cascade has run, the obligation should allow a sale to any buyer at the discounted price with the restriction intact, or, in some drafting, a release on defined terms. A cascade with no end leaves a house standing empty and an owner who cannot sell.
Verification is the operational question that gets ignored at drafting stage. Somebody has to check incomes and connections, issue the certificate and keep the register. Councils increasingly charge a monitoring fee for it. Ask what the process is and how long it takes before you agree the marketing periods, because a 12 week cascade with a six week verification step inside it is a 12 week cascade on paper and longer in practice.
Mortgageability and what lenders require
This is where discount market sale schemes fail, and it fails late, after units are built.
A lender will not advance on a property it cannot realise. The obligation therefore needs mortgagee protection provisions, and they need to be in the form lenders actually accept.
The workable structure: the lender may sell in possession after using reasonable endeavours for a defined period to find an eligible buyer at the discounted price, and if none is found the property may be sold on the open market free of the restrictions, with any surplus above the debt dealt with as the agreement provides.
| Drafting point | Why lenders care |
|---|---|
| Defined marketing period on repossession | Certainty about how long realisation takes |
| Release of restriction after that period | Ability to sell into the open market |
| No requirement for lender consent from the authority | Removes a discretionary block on sale |
| Restriction wording matching the obligation | Conveyancers must be able to read across |
| Named mechanism for the compliance certificate | Avoids a sale stalling at registration |
Test the drafting with a lender or a specialist conveyancer before the agreement is completed, not when the first plot goes to legal completion. Rewriting an agreement after the event means a deed of variation and the agreement of everyone with an interest in the land.
Resale, and why staircasing does not apply
Discount market sale has no staircasing. The buyer owns the whole property and there is no retained share to buy out, which is a real advantage over shared ownership for a buyer who wants a clean position.
What replaces staircasing risk is discount erosion risk. It comes from three places: a valuation basis that does not disregard the restriction, a mechanism allowing the owner to buy out the restriction for a payment, and a drafting failure that lets the percentage be recalculated rather than fixed.
Fix the percentage in the agreement and apply it to an unrestricted valuation at each sale. That way a 30 per cent discount is still a 30 per cent discount in 2060.
Where a buy out is allowed, the payment usually goes to the authority as a commuted sum for affordable housing elsewhere. That is a policy choice for the authority rather than a drafting default, and developers should not assume it is available.
Viability and the valuation consequence
For an appraisal, a discount market sale unit sells at a discount to market but carries close to full build cost, so the margin on those plots is thin. The comparison that matters is with a transfer to a registered provider, where the price is lower still but the risk transfers with it.
Discount market sale keeps the sales risk with the developer. Units are sold individually to individual buyers, through the eligibility process, at whatever pace the cascade allows. That is a cash flow question as much as a value question, and it belongs in the appraisal alongside the benchmark land value assessment rather than being treated as a like for like substitute for a bulk transfer.
Drafting a clause that works on resale
The checks worth making before an agreement is signed.
- Open market value is defined and expressly disregards the affordable restrictions.
- The discount is a fixed percentage stated in the agreement, not a formula recalculated at each sale.
- The eligibility cascade has defined periods and an express endpoint.
- Mortgagee protection provisions are present and in a form a lender will accept.
- A Land Registry restriction is required, with the wording set out in a schedule.
- The certificate of compliance process names who issues it and within what period.
- Monitoring fees and administration responsibilities are stated.
- The obligation binds successors in title and is expressed to run with the land.
Number two is the one most often missed, and it is the one that quietly turns an affordable home into a market one over three transactions.
Where the scheme's affordable provision is being set out for submission, the affordable housing statement is the document that explains the tenure mix, the products and how each will be secured, and it should describe the discount market sale mechanism rather than simply naming the product.
This is general guidance, not 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.
Frequently asked questions
What discount does a discount market sale home have to carry?
The national glossary definition requires a discount of at least 20 per cent below local market value, with eligibility determined by reference to local incomes and house prices and provisions keeping the discount for future eligible households. Individual authorities often require more through their own policies, so check the adopted local plan as well.
How should open market value be defined in the agreement?
As the value with vacant possession, expressly disregarding the affordable housing restrictions. Without that disregard the valuation becomes circular: each sale applies the discount to an already restricted figure, and the effective discount shrinks with every transaction until the home is effectively a market one.
Why do lenders refuse to lend on these units?
Because they cannot realise their security if the restriction blocks a sale. The agreement needs mortgagee protection provisions in a form lenders accept: a defined marketing period in possession, then a release allowing an open market sale. Test the drafting with a lender or specialist conveyancer before the agreement is completed.
Does discount market sale involve staircasing?
No. The buyer owns the whole property, so there is no retained share to buy out, which is one advantage over shared ownership. The equivalent risk is discount erosion, caused by a valuation basis that fails to disregard the restriction, a buy out mechanism, or a percentage recalculated rather than fixed.
What happens if no eligible buyer comes forward?
The eligibility cascade should have a defined endpoint. Once each tier of local connection has had its marketing period, the agreement should allow a sale to any buyer at the discounted price with the restriction intact, or a release on stated terms. A cascade with no endpoint leaves an owner unable to sell.
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.