What Is Development Finance? UK Property Developer Guide (2026)
Development finance is a specialist lending product used to fund the construction or substantial conversion of property in the UK. Unlike a bridging loan — which releases funds in full on day one — development finance is drawn down in tranches as the build progresses, with each drawdown triggered by a Quantity Surveyor's (QS) inspection confirming the work has been completed.
It is the primary funding product for UK property developers building new homes, converting commercial buildings to residential, refurbishing existing properties at scale, and undertaking mixed-use developments.
This guide explains how development finance works, who uses it, what it costs, how to qualify, and how it differs from the alternatives.
TL;DR — Development Finance in 60 Seconds
- What it is: a staged loan to fund property construction or conversion
- Who uses it: experienced and first-time developers, from single houses to large schemes
- Typical loan size: £150,000 to £25m+
- How funds are released: in drawdowns tied to build progress, monitored by a QS
- Interest charged on: drawn balance only — not the full facility
- Typical term: 12–24 months (longer for larger schemes)
- Key metric: GDV (Gross Development Value) — the projected end value of the completed scheme
- Exit: sale of units, refinance onto investment mortgages, or development exit finance
How Development Finance Differs from Bridging
Both are short-term property-backed loans, but they serve different purposes and are structured differently.
| Feature | Bridging Finance | Development Finance |
|---|---|---|
| Purpose | Acquire or hold property | Fund construction/conversion |
| Funds released | In full on day one | In staged drawdowns |
| Interest charged on | Full loan balance | Drawn funds only |
| Monitoring | None (typically) | Quarterly/monthly QS inspections |
| LTV assessment | Current market value | LTC and LTGDV |
| Typical term | 1–12 months | 12–24 months |
| Exit | Sale or refinance | Sale or hold with investment mortgage |
The practical implication of staged drawdowns: if you have a £1m facility but have only drawn £400,000 so far, you only pay interest on £400,000. This makes development finance significantly cheaper than a bridging loan of equivalent size when used correctly.
What Development Finance Is Used For
Development finance is used across a wide range of project types:
New build residential — the most common use case. Ground-up construction of houses, flats, or apartment blocks. The lender funds the construction costs after the developer has acquired the land (separately or with a land bridge).
Permitted development conversions — converting commercial buildings (offices, retail, industrial) to residential under Permitted Development Rights. A fast-growing sector following relaxed PD rules.
Refurbishment and renovation — heavy refurbishment projects that are too large or complex for a simple bridging loan. Typically defined as structural works, change of use, or significant building works.
Change of use — converting a building from one use class to another where full planning permission is required.
Mixed-use development — schemes that combine residential and commercial space. More complex underwriting but available from specialist lenders.
HMO and MUFB conversion — converting large houses into Houses in Multiple Occupation, or multi-unit freehold blocks.
Key Metrics: GDV, LTC, and LTGDV
Lenders assess development finance applications using three core metrics:
GDV (Gross Development Value)
The projected market value of the completed development. For a residential scheme of 10 flats, GDV is the sum of the anticipated sale prices of all 10 units. For a commercial-to-residential conversion, it's the market value of the converted building.
GDV is assessed by the lender's RICS valuer as part of the development appraisal. It is the single most important number in any development finance application. See GDV Explained for more detail.
LTC (Loan to Cost)
The loan amount as a percentage of total project costs (land + construction + fees + interest). Most lenders cap at 70–75% LTC. This means for every £100 of total costs, the lender contributes up to £70–75.
If your total project costs are £800,000 and the lender offers 75% LTC, the maximum loan is £600,000 — meaning you need to contribute at least £200,000 of equity.
LTGDV (Loan to Gross Development Value)
The loan amount as a percentage of GDV. Most lenders cap at 60–65% LTGDV. This is a separate constraint from LTC — lenders apply both and take the lower result.
If GDV is £1.2m and the LTGDV limit is 65%, the maximum loan is £780,000 — regardless of what the LTC calculation says.
See LTV vs LTC Explained for a detailed walkthrough of how these ratios are applied in practice.
How Much Can You Borrow?
A worked example:
Scheme: 4 detached houses, South East England Land cost: £300,000 (purchased separately) Construction costs: £450,000 Professional fees and contingency: £50,000 Total project cost: £800,000 GDV: £1,400,000
Lender caps: 75% LTC / 65% LTGDV
- 75% LTC: £800,000 × 75% = £600,000 maximum
- 65% LTGDV: £1,400,000 × 65% = £910,000 maximum
- Binding constraint: £600,000 (LTC)
The developer needs to contribute £200,000 equity (the gap between total costs and the loan). The equity can come from the land (if owned outright), cash, or mezzanine finance.
Who Qualifies?
Experienced Developers
Lenders prefer developers with a track record of completing projects. Two or more completed development projects typically unlocks:
- Higher LTCs (up to 80%)
- LTGDV lending (rather than LTC-only)
- Faster decisions
- Lower rates
First-Time Developers
Development finance is available to first-time developers, but expect more conservative terms:
- Lower maximum LTCs (60–65%)
- More detailed due diligence on the build cost and schedule
- Potentially a requirement for an experienced project manager or main contractor
- Stronger emphasis on the exit strategy and pre-sales (if applicable)
The Project Matters More Than the Developer
For smaller schemes (1–4 units) with a credible contractor, strong GDV, and a clear exit, first-time developers can access mainstream development finance. The quality of the appraisal and the strength of the professional team around you matter as much as your track record.
The Application Process
- Initial appraisal — prepare a development appraisal with land cost, build costs, GDV, fees, and projected profit
- Broker approach — a development finance broker will identify the best lenders for your project type, size, and experience level
- Indicative terms — lenders issue indicative terms (Heads of Terms) showing rates, fees, and loan structure
- Due diligence — the lender instructs a RICS valuer to assess GDV and an independent QS to review the build cost schedule
- Credit approval — the lender's credit committee approves the deal
- Legal work — solicitors on both sides draw up the facility agreement and charge documentation
- First drawdown — initial funds released (typically covering the site purchase or first phase of construction)
- Ongoing drawdowns — subsequent tranches released after each QS inspection confirms works complete
Total time from application to first drawdown: typically 6–12 weeks for a straightforward scheme.
Costs of Development Finance
Compared to bridging, development finance has additional cost components due to the staged nature of the loan:
| Cost | Typical Range |
|---|---|
| Monthly interest rate | 0.75%–1.1% on drawn balance |
| Arrangement fee | 1.5%–2.5% of facility |
| Exit fee | 1%–2% (on some lenders; not all) |
| QS monitoring fee | £1,500–£5,000+ |
| Valuation/development appraisal | £1,500–£5,000 |
| Legal fees (yours + lender's) | £4,000–£10,000 |
Interest is only charged on drawn funds, which materially reduces the effective cost compared to a bridge of the same size. A £1m development facility drawn over 18 months will cost significantly less in interest than a £1m bridge drawn in full from day one.
Exit Routes from Development Finance
The most common exits:
Sale of completed units — for residential schemes, selling each unit on completion. The development loan is repaid as sales complete.
Development exit finance — for developers who need time to sell but want to move off development rates. A lower-rate bridge product that replaces the development loan once the scheme is near or at practical completion.
Refinance onto investment mortgages — for developers building to let. Once the scheme is complete and tenanted, refinance onto individual BTL or HMO mortgages at standard investment rates.
Commercial mortgage — for mixed-use or commercial schemes held as investments.
Frequently Asked Questions
Can I borrow the land cost as well as the construction costs? Some development lenders will fund land purchase alongside construction — this is called a "land and build" or "single close" facility. More commonly, land is acquired with a short-term bridging loan and the development loan is drawn for construction only. Owning the land free of charge significantly improves your LTC position.
What if my build costs overrun? Most lenders require a contingency (typically 10–15% of build costs) built into the appraisal. If costs overrun beyond this, you'll need to fund the excess yourself or negotiate an increased facility with the lender. Lenders will not advance beyond their agreed limits automatically.
What is a QS and why do they matter? A Quantity Surveyor (QS) is an independent construction cost consultant appointed by the lender to monitor the project. They inspect the site before each drawdown, confirm the work claimed has been completed to the required standard, and certify the drawdown amount. The QS protects both the lender and, indirectly, the developer — cost overruns and specification changes are flagged early.
Do I need planning permission before applying? Full planning permission (or confirmed PD rights) is usually required before a development lender will commit. Lenders will not typically fund speculative pre-planning development. Some lenders will consider a facility conditional on planning being granted, but this is less common and expensive.
Can I use development finance for a property I already own? Yes — if you own land or a property free of charge (or with equity), you can use it as part of the development finance structure. The equity in the existing asset may form part or all of your required contribution.
Next Steps
For a detailed walkthrough of how the drawdown process works in practice, see How Development Finance Works: Drawdowns, QS & Interest.
For a comparison of the key metrics, see LTV vs LTC Explained and GDV — Gross Development Value.
To discuss your specific project, get in touch with our team. We'll review your appraisal and tell you honestly what's fundable, at what terms, and which lenders are most likely to back your scheme.