Commercial Bridging Loans

A development bridging loan is a short-term loan secured against property, used to fund a development project from initial site acquisition through construction and on to a planned exit. It differs from what a bridging loan is in its standard form, which typically finances the purchase or refinance of a property in its current condition rather than the value a project will create once work completes.

These loans are most commonly used for smaller-scale schemes: converting a single property into flats, building a handful of new units, carrying out a change-of-use conversion, or funding heavy structural refurbishment that a standard bridging lender would not support. Loan terms typically run from 6 to 24 months, with the exact structure, lump sum or staged, depending on the lender and the scale of the build.

Regulated vs unregulated development bridging

Most development bridging loans are unregulated because they are secured against property that is not, and will not become, your main residence. If any part of the security is or will be your home, the loan falls under regulation by the Financial Conduct Authority, which changes both the lender panel available to you and the consumer protections that apply. This is a classification of the product rather than a reflection of its quality, and a specialist broker should confirm the correct status for your specific project before you apply.

No. Development finance and development bridging are related but distinct products, and confusing the two is one of the most common mistakes developers make when researching funding. The clearest difference is how funds are released.

How payout structure differs

Traditional development finance releases money in staged tranches throughout the build, tied to a quantity surveyor's certification of work completed at each phase. A development bridging loan more often provides a single lump sum upfront, though a growing number of specialist lenders now blend the two, releasing bridging finance in stages against a monitoring surveyor's sign-off to combine speed with cost control.

Speed, flexibility and typical use case

Development bridging is usually faster to arrange and comes with fewer conditions, making it well suited to smaller projects, first-time developers, or schemes where speed matters more than borrowing the absolute maximum. Traditional development finance suits larger, multi-unit schemes where the longer arrangement time and more detailed cost scrutiny are justified by the scale of the facility.

Once you understand how development bridging is priced and released, comparing lender offers becomes far more straightforward.

Loan-to-cost, loan-to-GDV and standard LTV explained

Loan-to-value (LTV) measures the loan against the current market value of the site or property, exactly as it would for a standard mortgage. Loan-to-cost (LTC) measures the loan against your total project costs, including the purchase price, build costs and professional fees. Loan-to-gross development value (LTGDV) measures the loan against the projected value of the finished scheme. Most lenders cap borrowing at the lower of the LTGDV and LTC figures, and on smaller projects the LTGDV cap is usually the binding constraint, so a realistic end-value appraisal before you apply matters more than almost any other input.

Staged drawdowns and the monitoring surveyor's role

Where a lender blends bridging speed with development-style controls, funds are released in stages tied to construction milestones rather than as a single payment. A monitoring surveyor, appointed and paid for by you but acting on the lender's behalf, inspects the site at each stage, typically every four to six weeks during active building work, to confirm progress before the next tranche is released. Budget for a gap between spending and drawdown, since you generally need working capital to bridge each inspection cycle.

Roll-up vs serviced interest

Most borrowers choose to roll up interest, meaning it accrues and is added to the loan balance rather than paid monthly, then settled in full at redemption. This eases cash flow during the build but means the total cost grows the longer the project runs. Some lenders offer serviced interest instead, where you make monthly payments throughout the term, which is usually cheaper overall but requires reliable cash flow while funds are tied up in the build.

Development bridging loans are flexible enough to fund a wide range of property projects, from a single conversion to a multi-unit new build. The most common uses include the following.

• Site acquisition ahead of planning permission: secure land or a property at a lower price before consent is granted, though loan-to-value ratios are typically lower to reflect the added risk of an unconsented site.
• Construction and heavy refurbishment: fund structural conversions, change-of-use projects and small-scale new builds, including work that a standard refurbishment bridging loan would not stretch to cover.
• Bridging to a longer-term exit: if a development finance facility is due to expire before units are sold or let, a short-term development bridge can cover the gap and prevent a default on the original facility.
• Auction purchases with development potential: auction buyers who need to complete within 28 days often use development bridging to secure a property fast, with build costs then drawn down in stages.

Loan sizes across the specialist development bridging market range from around £75,000 for a single conversion up to several million pounds for larger schemes, with most lenders considering bigger projects on a case-by-case basis. Maximum borrowing is typically capped at 70% to 75% of gross development value (GDV), or a higher percentage on a loan-to-cost basis, whichever gives the lower figure. These are indicative, lender-dependent ranges rather than guarantees, and they move as market conditions and individual lender appetite change.

Worked example

Take a small development with a GDV of £600,000. You purchase the site for £220,000 and budget £180,000 for build costs, giving total project costs of £400,000. A lender offering 72% LTGDV would provide up to £432,000, while an 80% LTC lender would allow up to £320,000. The lower of the two, £320,000, sets your maximum facility, meaning you would need to fund roughly £80,000 of the project cost yourself, before fees.

The overall cost of a bridging loan for development depends on the loan size, the LTGDV ratio, your experience as a developer and how complex the project is. We don't quote a specific interest rate here because lender pricing varies significantly and changes with market conditions; your advisor should provide a personalised, up-to-date quote based on your project.

Interest is charged monthly and is usually either rolled up into the loan and repaid at redemption, or serviced through regular monthly payments during the build. Rolled-up interest is more common because it avoids monthly outgoings while your capital is tied up in construction, but it compounds, so the total cost rises the longer the project takes.

Fees to budget for

Beyond interest, expect an arrangement fee, a valuation fee, legal fees for both your solicitor and the lender's, monitoring surveyor charges at each drawdown stage, and sometimes an exit fee on redemption, though this is increasingly waived in a competitive market.

Development bridging lenders assess a project as much on its viability and your exit strategy as on your personal credit history, which makes the product more accessible to first-time developers than traditional development finance tends to be. Experienced developers with a strong track record generally access the widest lender panel and most competitive terms, but a credible first project with realistic costings and a strong exit plan can still be funded.

You'll typically need to provide the following.

• Schedule of works: an itemised breakdown of the build costs and timeline.
• Planning status: evidence of full planning permission, or a credible pathway to it if you're applying pre-consent.
• Contractor quotes: costings from your builder or contractor supporting the schedule of works.
• Exit strategy evidence: a mortgage agreement in principle, estate agent appraisal, or comparable sales evidence.
• Proof of funds for any shortfall: evidence you can cover the gap between the facility and total project cost.
• ID and proof of address: standard identity verification for all applicants.

Adverse credit isn't automatically a barrier. Some lenders will look past historic credit issues where the project stacks up and the exit is credible, though expect a smaller lender panel and higher leverage requirements from you. If your project is a smaller residential purchase rather than a full development, using a bridging loan to buy a house may be a simpler, more cost-effective route.

Development bridging is a short-term facility, so lenders assess your exit strategy, how you plan to repay, as closely as any other part of your application. The most common exit routes are the sale of completed units, refinancing onto a commercial mortgage or buy-to-let mortgage, or refinancing onto a longer-term development finance facility if the project or sales period is taking longer than planned.

Lenders want evidence that your chosen exit is realistic and achievable within the loan term, not just a stated intention. This typically means an estate agent appraisal or comparable sales evidence if you plan to sell, or a mortgage agreement in principle if you plan to refinance. If you're weighing up letting completed units against refinancing onto a standard mortgage once the project completes, our guide to bridging loan vs mortgage explains the trade-offs in more detail.

Development bridging can be the right tool for the right project, but it carries risks that are important to weigh up before you commit.

• Cost overruns: property development rarely goes exactly to budget, and unexpected costs erode the margin between your total spend and the eventual sale or refinance value.
• Compounding roll-up interest: if your build or sale runs later than planned, rolled-up interest continues to accrue on the outstanding balance, increasing the total amount you owe at exit.
• A failed exit strategy: if completed units don't sell or a refinance falls through within the loan term, you may need to extend at a higher cost, or the lender may apply default rates.

Risk warning: a development bridging loan is a loan secured against property. If it is not repaid or refinanced by the end of the agreed term, your property is at risk of repossession. We strongly recommend seeking independent financial and legal advice before committing to any development bridging facility. MoneyHelper (moneyhelper.org.uk, 0800 138 7777) offers free, independent guidance if you want a second opinion.

Development bridging criteria, LTGDV and LTC bands, and appetite for first-time developers vary significantly from lender to lender, far more than with a standard mortgage. A lender that declines your project outright might be a strong fit for a different applicant with an almost identical scheme, simply because of how that lender weighs experience, location or project type.

Working with a broker gives you access to a whole-of-market comparison rather than a single lender's fixed criteria or one broker's own limited panel. Rather than approaching lenders one at a time and hoping for a fit, an advisor matches your project against criteria across the specialist market and structures your application around the lenders most likely to say yes on workable terms. You can then access expert advice with no pressure to proceed while you weigh up development bridging against traditional development finance or another funding route.