Residential Development Finance

What is residential development finance?

Residential development finance is short-term funding for building or converting homes for sale or letting, advanced in stages against certified build costs and repaid from unit sales or a refinance onto term mortgages when the homes are complete. The facility is capped by the finished scheme's gross development value and by its total cost, with interest rolled up rather than paid monthly, and it runs for the build period plus a sales or letting period. Lending to a company or investor is unregulated business finance; a development the borrower will live in is regulated self-build lending under the Financial Conduct Authority's MCOB rules and uses a different product.

England added 208,600 net new dwellings in 2024 to 2025, of which 190,600 were new builds, 17,710 came from changes of use and 3,850 from conversions between houses and flats, against a government target of 1.5 million homes this Parliament (MHCLG accredited official statistics).

Residential development finance rates

Residential development finance is priced through interest and fees. Interest is charged on the drawn balance and rolled up or retained. The fees are an arrangement fee on the facility, an exit fee on the loan or the GDV, monitoring surveyor fees for each drawdown, and the lender's valuation and legal fees. The property development finance hub sets out the full cost structure.

As at 1 October 2026, the lowest development finance rate we were seeing was 0.45% a month, for the strongest schemes. Riskier schemes price above that, because pricing rises with leverage, scheme risk and the developer's experience. Every rate is subject to status and lender criteria and can change.

If you have a site, a planning consent or an appraisal, get in touch. We run both caps against the scheme and check the exit it supports before any lender is approached.

Residential development finance criteria

The figures below are what we see on the cases we arrange, as at 1 October 2026. They describe our experience across the lenders we use and are not a rule for the whole market. Each lender sets its own criteria, and the terms on any scheme depend on the scheme, the borrower and the lender's own assessment.

Scheme types and how each is funded

Residential development finance covers every route to a new home, and the lender's questions change with the route.

Ground up housing development finance

New-build houses on a cleared or greenfield site, from a single plot to a multi-unit scheme, attract the full residential ceilings: up to 75% LTGDV and 90% LTC on the cases we arrange. Lenders underwrite the planning consent and its conditions, a tendered or fixed-price build contract, the programme, the contingency, the developer's and contractor's track record, the warranty provider's registration of the plots and the sales evidence for the finished houses. Drawdowns follow the build from groundworks through superstructure to completion, and groundworks abnormals (services, ground conditions, drainage) are the main cost risk on ground-up schemes. Our ground up development finance page covers the staging in detail.

Apartment and flat development finance

Blocks of flats add three layers to the housing underwrite. The first is the title structure: leasehold units off a freehold, with the lease terms and ground rent reviewed for the exit lender (ground rent is a peppercorn on most new long residential leases granted since 30 June 2022). The second is the building's height and fire-safety position: a block at least 18 metres high or with at least seven storeys, with at least two residential units, is a higher-risk building under the Building Safety Act 2022, and building control approval from the Building Safety Regulator, needed before construction starts (the stage still often called the gateway approval), sits on the critical path. The third is how concentrated the exit market is. A block sold unit by unit to investors is an investor-led block, which the buy to let mortgage guide explains lenders manage by capping their exposure per development. Sales, buy to let refinances and whole-block retention are all common exits, and the mix is decided at appraisal.

Conversion and permitted development finance

Converting offices, shops, agricultural buildings, pubs and larger houses into homes, under full planning or under permitted development rights with prior approval, is a residential scheme with no groundworks, a faster programme and an existing structure whose condition is the unknown. On the cases we arrange, conversions are funded on the same residential ceilings. Lenders want a structural survey, the prior approval decision and its conditions (space standards, natural light, contamination, flood risk), and they look closely at the cost plan's allowance for what the strip-out reveals. Change of use delivered 17,710 homes in England in 2024 to 2025 (MHCLG); the warranty and certification position at exit is on investing in new builds and conversions.

HMO and co-living development finance

Creating a House in Multiple Occupation from a single dwelling, or building a purpose-designed shared-living scheme, is funded up to 75% LTGDV on the cases we arrange. The exit is underwritten on the HMO valuation route, the licensing position and the planning use (C4 for an HMO of up to six residents, sui generis for seven or more, and a planning application for a change to C4 in Article 4 areas). The GDV is the finished HMO's value on the basis the exit lender's valuer will use (comparable, hybrid or income-led), so the refinance route is chosen before the build. The exit is covered in our HMO mortgages guide and the multi-unit version on MUFB mortgages.

Develop-to-let and build to rent

A scheme built to be kept and let exits by refinance rather than sale: onto individual buy to let mortgages unit by unit, onto a multi-unit or portfolio facility for the block, or, at institutional scale, onto build to rent investment lending against stabilised rent. The refinance lender sizes its loan on rental coverage and loan-to-value rather than on cost, so the develop-to-let exit is tested at appraisal by running the finished units through the buy to let stress test. Step 3 below works the arithmetic, and the build to rent structure is on build to rent development finance.

Small sites and SME developer finance

Single plots, infill sites, garden plots and schemes of a handful of units are funded on the same ceilings as larger schemes, by lenders whose minimum loan and appetite suit the scale; on the cases we arrange, development facilities start from around £50,000. Small-site lenders weigh the developer's own involvement, a fixed-price contract with a credible builder and the simplicity of the exit. Profit on cost thresholds apply at any size, and a small scheme with a thin margin fails the same test a large one does.

First-time developer finance

First-time developers are funded through stretched senior facilities, which lend to the residential ceilings at a higher price without a track record, and through joint venture structures in which the funder replaces the equity for a profit share. In place of experience, lenders look for a strong contractor, a project manager or monitoring arrangement, a clean consent and a simple exit. Development finance for first-time developers covers this in full, including private-investor deposits.

Self-build and custom build

A home the borrower will live in is regulated lending with a different product set: self-build mortgages with staged advances. See self-build mortgage lenders and, for a future home needing structural work, renovation mortgages. Timber frame, SIPs and modular systems are covered on our non standard construction mortgages page.

The documents we ask for first depend on the scheme: the consented drawings and the build tender for housing; the unit schedule, the height and the intended sales mix for flats; the prior approval or planning decision and the structural survey for a conversion; the licensing and planning position for an HMO; the rental appraisal for a scheme you intend to keep; and the appraisal and the contractor's credentials for a first scheme. For a home you will live in, tell us at the outset.

How residential development finance is arranged

1. We appraise the scheme against both caps, define and test the exit (sales, buy to let refinance or retention) and obtain indicative terms from matching lenders.
2. The lender instructs a development valuation (site value, GDV on a sales or investment basis, and a cost review) and the monitoring surveyor's initial report. Its solicitors review title, planning conditions, affordable housing and levy obligations and the warranty provider's registration, and the security documents are completed.
3. The land or purchase advance is released, then build costs are drawn in arrears against the monitoring surveyor's monthly certificates, with interest rolled up.
4. At practical completion the warranty is certified and sales complete against the agreed release prices, or the units are refinanced onto term mortgages, or a development exit loan takes over where sales run beyond the term.

Sales, releases and the develop-to-let exit

Three mechanisms decide whether a residential scheme is funded, built and exited on the numbers in the appraisal: the two caps, the sales release and the refinance test. The developer can run each of them before instructing anyone.

Step 1. The two caps on a housing scheme

An illustrative eight-unit scheme: eight houses at £250,000 each (£2,000,000 GDV) against £1,600,000 of total cost.

Illustrative arithmetic on hypothetical figures, using the residential ceilings we see on the cases we arrange (75% LTGDV, 90% LTC). Not an offer of finance.

The cost cap binds, so the developer funds 10% of cost plus any costs the lender excludes, and the facility must hold the rolled-up interest and fees inside the £1,440,000. At these ceilings the cost cap binds whenever the profit on cost is above 20%, because 90% of cost is then less than 75% of GDV. If the value cap bound instead, the scheme's profit would be thin, which is why the two caps and the profit-on-cost test are three views of the same risk.

Step 2. How units are released from the facility

As houses sell, the lender releases its charge on each unit against a minimum release price: an agreed share of each sale's proceeds, set so that the facility is repaid before the last units complete. The release basis varies from lender to lender, so it is agreed in the facility terms. Because early sales go to the lender first, the developer's profit is largely locked in the final units. Off-plan reservations and exchanges during the build strengthen the case at credit stage, and lenders may reduce leverage where the appraisal assumes a faster sales rate than local evidence supports.

Step 3. The develop-to-let test

Where units are to be kept and let, the exit is a buy to let refinance, and the refinance lender sizes its loan on rent and loan-to-value rather than on cost. Take one of the eight houses, let at an illustrative £1,100 a month and refinanced on a two-year fixed product stressed at 5.5%, the two-year stress we see on the cases we arrange, with a 125% interest coverage ratio and a 75% loan-to-value ceiling.

Illustrative only. The rent is hypothetical, and each refinance lender applies its own stress rate and coverage ratio. The buy to let mortgage guide sets out the mechanics.

Here the loan-to-value cap binds rather than the rent, so the refinance is value-led; on a lower-value, higher-yield scheme the rent would bind instead. A higher-rate personal borrower assessed at 145% coverage would support £165,517 (£13,200 ÷ 1.45 ÷ 0.055), below the £180,000 facility per unit, so that refinance would not clear the facility. The test tells the developer, before the build, whether keeping the units is financeable and on which structure. Either way, the exit facility must repay the development facility including rolled-up interest, which is why the develop-to-let appraisal is run on the facility figure rather than the build cost.

Step 4. What sits inside the cost plan

Residential cost plans carry items that surface late if they are not appraised early: affordable housing contributions and Section 106 obligations, the Community Infrastructure Levy where the council charges it, warranty registration and inspection fees, the energy specification required by current Building Regulations and the forthcoming Future Homes Standard, and, for flats in a higher-risk building, building control approval from the Building Safety Regulator under the Building Safety Act. Lenders test the contingency against these, and the monitoring surveyor reports on them monthly.

Step 5. The tenancy regime behind the letting exit

Since 1 May 2026 every new tenancy in England runs as an assured periodic tenancy under the Renters' Rights Act (gov.uk overview for landlords). The refinance lender underwrites rental sustainability and management on that basis, and the exit appraisal should assume periodic tenancies rather than fixed terms.

What decides the case

The site and the consent are fixed. The developer controls the exit mix (sell, keep or both), the sales evidence and reservations, the contingency inside the cost plan, and the choice of a lender whose appetite matches the scheme's scale and the developer's experience. Run both caps, the release maths and the refinance test before the valuation is instructed, so the lender can assess the scheme against its full limits.

Related reading: the property development finance hub covers tiers, drawdown and the calculator; the buy to let mortgage guide covers the refinance; commercial property development finance covers the commercial equivalent.