What Is Development Finance?
Development finance is a specialist short-term loan used to fund the construction of new buildings or the major conversion of existing ones. Unlike a standard mortgage (which funds the purchase of a finished property), development finance funds the process of creating value through construction.
The loan is advanced in stages as building work progresses, rather than as a single lump sum. This protects both the lender and the developer: funds flow only when verifiable construction milestones have been reached.
Development finance sits on top of (or alongside) the land purchase. The lender advances a proportion of the land value on day one, then releases further funds throughout the build. At the end of the project, the loan is repaid either by selling the completed units or by refinancing onto long-term investment mortgages.
| Feature | Development Finance | Standard Mortgage |
|---|---|---|
| What it funds | Construction of new or converted property | Purchase of completed property |
| How funds are released | In staged tranches as works progress | Single advance at completion |
| Term | 9–24 months | 5–30 years |
| Interest | Rolled up, paid at end of project | Monthly payments throughout |
| Primary security | The site and completed development (GDV) | The finished property |
| Assessment focus | Project viability, GDV, developer experience | Borrower income and credit score |
| Who it is for | Developers, builders, SPV companies | Owner-occupiers, investors |
Who uses development finance
Property developers building new homes, landlords converting commercial buildings to residential, investors carrying out large-scale HMO conversions, and housing associations building affordable units all use development finance. The minimum practical loan size is around £100,000; large schemes can run to £50 million+.
How It Works
Development finance works on two primary metrics. The first is LTGDV, the loan as a percentage of the completed development's total market value (the GDV). Lenders typically advance up to 65–70% LTGDV, meaning for every £1 million of completed value, they will lend up to £650,000–£700,000 in total.
The second metric is LTC, the loan as a percentage of total project costs. This typically caps at 70–85%, ensuring the developer contributes meaningful equity to the scheme.
Lenders also require a minimum profit on GDV of 20–25%. If the scheme's profit margin is too thin, most lenders will not proceed: insufficient margin means insufficient buffer against cost overruns or a weaker sales market.
- 01
Developer submits a development appraisal
The appraisal is a financial model showing land cost, build cost, professional fees, finance costs, sales costs, and the projected GDV. It demonstrates the scheme is viable and profitable.
- 02
Lender reviews and issues indicative terms
Based on the appraisal, the lender provides heads of terms: the day one advance, total facility, LTGDV, rate, arrangement fee, and any conditions. No commitment on either side at this stage.
- 03
RICS valuation and build cost review
The lender instructs an independent RICS surveyor to assess the site value, review the build cost schedule, and provide a GDV opinion on the completed development.
- 04
Monitoring surveyor appointed
The lender appoints a monitoring surveyor: an independent construction professional who will oversee the build on the lender's behalf throughout the project.
- 05
Legal completion: day one advance released
The facility agreement is signed and the first charge registered. The day one advance is drawn, covering the land purchase price or, if already owned, a proportion of the land value.
- 06
Construction begins: staged drawdowns
As building work reaches agreed milestones, the developer requests each tranche. The monitoring surveyor inspects and certifies. The lender releases the funds within a few working days.
- 07
Practical completion and exit
Construction finishes. The monitoring surveyor issues a practical completion certificate. Units are sold or refinanced to repay the development loan in full.
Tranches & Monitoring Surveyors
A tranche is a scheduled release of loan funds tied to a specific construction milestone. A typical residential development might have five to eight tranches: foundations, ground floor slab, wall plate, roof structure, first-fix, second-fix, and practical completion.
Before each tranche is released, the monitoring surveyor visits the site, reviews progress against the schedule of works, and issues a drawdown certificate to the lender. Only after this certificate is received will the lender transfer the next portion of funds.
The monitoring surveyor is appointed by the lender but paid by the developer, typically £1,000–£3,000 per residential unit across all visits. Their role is to protect the lender's money, not the developer's interests. However, their sign-off is what unlocks further funds, so maintaining a good working relationship and communicating proactively is important.
Cash flow timing
There is typically a 5–10 working day gap between a drawdown request and receipt of funds, once the monitoring surveyor visit is arranged and the certificate issued. Experienced developers plan their contractor payments around this cycle, not around the date they submit the request.
Rates & Costs
Development finance rates are charged monthly on the outstanding drawn balance, not on the full facility. A developer who has drawn £300,000 of a £1 million facility pays interest only on the £300,000 actually drawn. Interest is rolled up during the build and repaid on exit; there are no monthly payments during construction.
| Borrower profile | Monthly rate | Max LTGDV |
|---|---|---|
| Experienced developer, clean credit | 0.33–0.55% | Up to 70% |
| Experienced developer, adverse credit | 0.55–0.75% | 60–65% |
| First-time developer, clean credit | 0.55–0.75% | Up to 65% |
| First-time developer, adverse credit | 0.75–1.0% | 55–60% |
In addition to the monthly rate, budget for the following costs:
- Arrangement fee: 1.5–2% of gross loan, usually deducted at drawdown
- RICS valuation: lender-instructed, borrower's cost; typically £1,500–£5,000+ depending on scheme size
- Monitoring surveyor: £1,000–£3,000 per residential unit (all visits combined)
- Legal fees: both parties instruct solicitors; typically £5,000–£15,000 each for a residential scheme
- Exit fee: 0–1% of gross loan on some facilities
Interest on drawn balance
Because interest accrues only on funds actually drawn, total interest cost is significantly lower than the headline rate × full facility × term would suggest. A £1 million facility drawn progressively over 12 months will accrue roughly 50–60% of the total interest compared with a bridging loan of the same amount outstanding for the full term.
Real-World Use Cases
Development finance is used wherever construction creates value. Five of the most common applications:
- 01
Ground-up residential development
A developer acquires a plot with full planning permission for 8 detached houses. Development finance covers the land purchase (day one advance) and the full build cost (progressive tranches). On completion, the houses are sold individually and the loan repaid from proceeds.
- 02
Commercial-to-residential conversion
An investor acquires a vacant office building under permitted development (prior approval) to convert to 12 flats. Development finance funds the acquisition and the conversion costs. Exit: sell the completed flats or refinance to investment mortgages.
- 03
Barn conversion
A landowner has obtained planning permission to convert an agricultural barn into four residential dwellings. Development finance releases equity from the land and funds the conversion works. Exit: sell the completed homes.
- 04
Brownfield regeneration
A developer acquires a former industrial site with full planning for 25 units of mixed-tenure housing. Development finance covers the purchase, demolition, remediation, and full construction programme over 20 months.
- 05
First-time developer: small scheme
An architect buys a plot with planning for two semi-detached houses as their first development. With a strong professional team, a reputable main contractor, and a lower LTGDV of 60%, specialist lenders will consider first-time developers on appropriately sized schemes.
Key Risks
Development finance is a powerful tool but carries real risks. Understanding them before committing is essential.
| Risk | What it means | How to mitigate |
|---|---|---|
| Cost overruns | Build costs exceed the schedule: tranche facility is exhausted before completion | Build in 10–15% contingency. Use a fixed-price contract where possible. |
| Programme slippage | Build takes longer than planned: bridge expires; penalty rates apply | Add 20–25% buffer to build timeline when calculating loan term. |
| GDV shortfall | Completed units sell for less than the appraised GDV: proceeds insufficient to repay the loan | Stress-test GDV at 10–15% below RICS opinion. Ensure sales comparables are genuinely comparable. |
| Planning complications | Pre-commencement conditions take longer to discharge than expected, delaying start | Discharge all planning conditions before drawdown. Build condition period into programme. |
| Contractor failure | Main contractor enters administration during the build | Vet contractor thoroughly. Consider contractor insolvency insurance. Retain a shortlist of replacement contractors. |
| Personal guarantee called | If project fails, director PG exposes personal assets to the lender | Ensure the scheme is stress-tested before signing. Understand your maximum liability exposure. |
Personal guarantees
Almost all development finance facilities require a personal guarantee from the borrowing entity's directors. If the project fails and the SPV cannot repay, the lender can pursue the guarantors personally for the outstanding balance. The guarantee is not capped at the director's equity contribution; it typically covers the full outstanding loan.
FAQs
How big does my scheme need to be?
Minimum practical loan sizes are typically £100,000–£150,000. The specialist lender market covers everything from single-unit conversions to large multi-phase urban regeneration projects. First-time developers are best advised to start with smaller schemes (1–4 units) where lender appetite is greatest and the learning curve most manageable.
Do I need full planning permission?
Full planning permission is strongly preferred by most development lenders and commands the best LTVs. Some lenders will consider schemes with outline planning permission at a lower LTGDV. Lending against a site with no planning at all is treated as land finance (a different product) rather than development finance.
Can I get development finance as a first-time developer?
Yes, though your options are narrower and LTVs lower. Most lenders expect a strong professional team (an experienced architect, structural engineer, and main contractor) to compensate for the developer's own lack of track record. Appointing an independent project monitoring service (such as Gleeds or Rider Levett Bucknall) can significantly strengthen a first-time developer's application.
What is the difference between the gross loan and what I receive?
The gross loan is the total facility, including rolled-up interest and fees. The net loan is what you actually receive: the gross loan less the arrangement fee and any interest retained upfront. For example, a £1 million gross facility at 2% arrangement fee with £60,000 of retained interest gives a net advance of £940,000. Always model on the net figure.