The distinction between bridging finance and development finance is primarily one of project complexity and risk. Bridging finance covers situations where funds are needed quickly for a property acquisition or for relatively light refurbishment works — and where the property can be offered as security in its current state (the lender is confident the existing bricks-and-mortar provide sufficient security for the loan). Development finance covers more complex projects — new build ground-up construction; conversion of commercial buildings to residential apartments; or heavy refurbishment where the property is uninhabitable during the works and cannot be used as security in its current state without a significant haircut. Development lenders are comfortable underwriting against the GDV because their analysis of comparable sales, planning consents, and construction cost estimates gives them confidence in the completed value.
The staged drawdown structure of a development loan is one of its most distinctive features. Rather than advancing the full loan on day one, development lenders release funds in tranches as the project reaches agreed milestones — typically tied to site acquisition (initial draw), groundworks and foundations, superstructure frame, watertight/roofed, first fix (electrics and plumbing), second fix, and practical completion. Before each drawdown, the lender's monitoring surveyor (also called a development monitor) inspects the site, verifies that the works have been completed to the required standard and specification, and confirms the percentage of project costs incurred. Only after the monitoring surveyor sign-off does the lender release the next tranche. This mechanism protects the lender — and the borrower — from over-drawing on a project that has stalled or where cost overruns have emerged.
Development finance mechanics, GDV, LTC, drawdown, rolled-up interest, mezzanine and development exit facility
The complete framework for property development finance for landlords and residential developers:
- Development loan vs bridging loan, GDV, LTC and loan sizing: DEVELOPMENT LOAN vs BRIDGING LOAN: (a) BRIDGING LOAN (regulated or unregulated): short-term loan (typically 1-24 months); immediate full drawdown on day one; interest can be rolled up or serviced monthly; used for: property acquisition; purchase at auction; light to moderate refurbishment (new kitchen; bathrooms; decoration; minor structural works); property that can be used as security in current state; loan sized against existing OMV (Open Market Value) — typically 70-75% LTV; exit: refinance to BTL mortgage or sale. (b) DEVELOPMENT LOAN: specialist lending for new builds; conversions; heavy refurbishment; uninhabitable properties; the property CANNOT be offered as security in its current state without a substantial reduction; loan sized against GDV (Gross Development Value) — typically 60-70% of GDV AND no more than 65-90% of total project costs (LTC); staged drawdown (not full advance on day one); monitoring surveyor required; duration: typically 12-36 months; exit: development exit bridge; BTL refinance; sale of completed units. GROSS DEVELOPMENT VALUE (GDV): the GDV is the cornerstone of development finance underwriting — it represents the estimated open market value of the completed development (all units; all floors; all uses) at the time the development will be completed. The GDV is assessed by a RICS-registered valuer (development valuer) based on: comparable recent sales in the area (comparable evidence); planning consents obtained (the consented scheme drives the GDV); current market conditions; risk adjustment (typical 5-15% discount for planning and market risk). LOAN-TO-COST (LTC): development lenders underwrite against both the GDV AND the total project costs. Total project costs include: land purchase price (or existing site value); planning and professional fees (architect; structural engineer; quantity surveyor; planning consultant; legal); construction costs (including contingency — typically 10-15% of build costs); finance costs (rolled-up interest; monitoring surveyor; lender arrangement fee; broker fee); sales and marketing costs; VAT (recoverable on qualifying residential conversions — zero-rated new build; partially recoverable on mixed conversions). LTC: development lenders typically advance between 65% and 90% of total project costs — the higher LTC (85-90%) is achieved by adding mezzanine finance on top of the senior debt. The senior lender typically advances 65-75% of total costs; mezzanine finance (if used) bridges the gap to 80-90% of costs. DEVELOPMENT APPRAISAL: before approaching any lender, the developer must prepare a development appraisal (usually in a Argus Developer or Excel model) showing: GDV; total costs; loan amount; interest; fees; profit; developer profit margin (typically 15-20% on GDV or 20-25% on cost is the minimum lenders expect to see in the residual analysis). Lenders will not advance development finance where the projected profit margin is insufficient to absorb cost overruns and market movements.
- Staged drawdown, rolled-up interest, mezzanine finance, development exit facility and lender landscape: STAGED DRAWDOWN FACILITY: a development loan is drawn in tranches (typically 5-8 tranches over the project duration) — not as a single advance. The typical drawdown sequence: (a) INITIAL DRAW: at loan start — covers the land/site acquisition cost (or refinances existing site ownership); the initial advance is typically the largest single tranche; (b) CONSTRUCTION TRANCHES: released as works reach agreed milestones (foundations; frame; watertight; first fix; second fix; practical completion); each tranche requires a monitoring surveyor inspection and report; (c) DRAWDOWN MECHANICS: the borrower submits a drawdown request with supporting documentation (QS cost plan; site photographs; subcontractor invoices; monitoring surveyor report); the lender's monitoring surveyor verifies the claimed completion percentage; the lender releases the tranche (typically 3-5 working days from a clean monitoring surveyor report). The staged drawdown reduces interest roll-up on undrawn funds — the borrower only pays rolled-up interest on amounts actually drawn (not on the full facility from day one). ROLLED-UP INTEREST: development finance typically uses rolled-up (also called 'retained' or 'capitalised') interest — the borrower does not make monthly interest payments during the construction period; instead, interest accrues daily on the drawn balance and is added to the loan balance; the rolled-up interest is repaid when the loan is repaid at practical completion (from sale proceeds or exit finance). Example: development loan £1,500,000; interest rate 0.8% per month; 18-month development period; approximate total rolled-up interest = £216,000 (indicative — actual depends on drawdown profile). The gross loan facility is usually structured to include an interest reserve (the lender holds back a portion of the facility to cover the rolled-up interest — so the borrower does not need to service interest from their own funds during construction). MEZZANINE FINANCE: where the senior development lender's maximum advance (typically 65-75% of costs or 60-65% of GDV) is insufficient to cover the project with a reasonable equity contribution, a mezzanine lender can provide additional funding — the 'mezzanine tranche' sits ABOVE the senior debt (in terms of the project stack) but BELOW the developer's equity. The mezzanine lender takes a second charge on the development site (behind the senior lender's first charge). Mezzanine rates: typically 15-25% per annum (charged on drawn mezzanine balance, also rolled up); the high rate reflects the higher risk (second charge; behind senior lender in any enforcement). The combined LTC with senior + mezzanine finance can reach 80-90% of total project costs — reducing the developer's equity contribution significantly. DEVELOPMENT EXIT FACILITY: when the development reaches practical completion (building regulations completion certificate issued; building structurally complete) but units have not yet been sold or refinanced, a development exit bridge can refinance the development loan onto lower-cost facilities — the completed units now have a definable market value (GDV is no longer an estimate — the units are built and can be sold or rented). Development exit rates: typically 0.5-0.9% per month (significantly lower than construction-phase development finance rates); the exit bridge is typically 6-18 months; exit by sale (individual unit sales or en-bloc sale) or refinance to BTL mortgage (if retaining units as rental portfolio). DEVELOPMENT FINANCE LENDER LANDSCAPE: specialist development finance lenders (not high-street banks): Maslow Capital; United Trust Bank; Octane Capital; Blend Finance; Hope Capital; Assetz Capital; Hampshire Trust Bank; Shawbrook Bank; Aldermore Bank; Together Money; LendInvest; Allica Bank. Specialist broker required: development finance requires specialist brokers (not standard mortgage brokers) with experience in development appraisals and lender relationships — typical broker fee 1-2% of loan facility
Frequently asked questions
What is the difference between development finance and a bridging loan?+
Bridging finance is for short-term acquisitions or light refurbishment where the property can be offered as security in its current state — the lender lends against the existing Open Market Value (OMV; typically 70-75% LTV). Development finance is for new builds, conversions, or heavy refurbishment where the property cannot be used as security at its current value — the lender underwrites against the Gross Development Value (GDV; the estimated completed value) and releases funds in staged tranches as works progress, monitored by a development monitor surveyor.
What is Gross Development Value (GDV) and why does it matter?+
GDV is the estimated open market value of the completed development — the total value of all units when built out and sold or let. It is the cornerstone of development finance underwriting. Development lenders typically advance 60-70% of GDV and/or 65-90% of total project costs (LTC). A robust GDV estimate (by a RICS development valuer, based on comparable sales and planning consents) is essential for any development finance application.
What is mezzanine finance in property development?+
Mezzanine finance is additional lending that sits above the senior development lender's maximum advance — typically bridging the gap from the senior lender's 65-75% of costs to 80-90% of total costs. The mezzanine lender takes a second charge on the development site. Mezzanine rates are typically 15-25% per annum (rolled up, like senior development finance). Mezzanine finance reduces the developer's required equity contribution — useful for developers who want to maximise their capital efficiency across multiple projects.
What is a development exit facility?+
A development exit facility refinances the development loan onto lower-cost finance once the construction is complete — the completed units now have a definable market value (no longer an estimate). Development exit rates are typically 0.5-0.9% per month (vs higher construction-phase rates). The exit bridge is typically 6-18 months — giving time to sell individual units, complete an en-bloc sale, or refinance completed units to a BTL mortgage for retention in the portfolio.
- Bridging loan — short-term finance for property acquisition and light refurbishment →
- New build buy-to-let — mortgage availability and developer incentives →
- Commercial-to-residential conversion — permitted development and finance →
- Section 106 planning obligations — affordable housing and CIL →
- VAT on residential conversion — zero-rating and 5% reduced rate →
- Capital allowances — development project expenditure and plant deductions →