Commercial Conversion Funding Guide for UK Projects

By Your Financial Assurance’s FCA-authorised property finance advisers

A vacant office above shops, a former pub, a tired retail unit or an industrial building with planning potential can look like a straightforward conversion opportunity. The funding rarely is. A commercial conversion funding guide needs to start with the point lenders care about most: how the project will be completed and how their loan will be repaid.

The purchase price is only one part of the capital requirement. You may need to fund acquisition, stamp duty, professional fees, planning conditions, works, contingencies, interest and the gap before a sale or refinance completes. Getting the finance structure right before exchange can protect your deposit, programme and eventual profit.

Start with the property, planning and exit

Before discussing rates, establish whether the proposal is a light refurbishment, a material change of use, a permitted development scheme or a full conversion requiring planning consent. Lenders will assess these very differently. Replacing kitchens and bathrooms in a building already configured as flats is not the same risk as converting offices into eight new residential units.

For a commercial-to-residential conversion, an underwriter will usually want the purchase contract, planning position, drawings, schedule of works, build costings and evidence of the intended exit. If permitted development rights are being used, the prior approval position matters. If full planning is required, expect appetite and leverage to be more cautious until consent is in place.

Your exit strategy should be specific. A sale exit needs realistic comparable evidence, a marketing period and room for a lower-than-expected valuation. A refinance exit needs a likely end value, rental evidence where relevant, and a lender that will accept the finished property, borrower structure and income profile. Saying that the property will be worth more after the works is not an exit strategy on its own.

Choosing commercial conversion funding

The most suitable facility depends on the condition of the asset, scale of works and certainty of planning. In practice, conversion funding usually falls into one of three routes.

Bridging finance for purchase and light works

A bridging loan can suit a property that cannot yet be mortgaged conventionally because it is vacant, lacks a kitchen or bathroom, has commercial use, needs repair, or requires a quick completion. It is short-term finance, commonly arranged for 1 to 24 months, and can be particularly useful where a seller requires certainty or a purchase must complete quickly.

For smaller or lighter schemes, a bridge may fund the purchase and sometimes a proportion of the refurbishment costs. Some lenders assess the initial loan against the day-one value, while others will take account of the expected value after works, subject to their criteria and evidence. Bridging is expensive compared with long-term mortgage finance, so the term should be no longer than the project and exit genuinely require.

Interest can be retained, rolled up or serviced. Retained interest is deducted from the facility at the outset to cover the agreed term. Rolled-up interest accrues and is repaid at redemption. Serviced interest is paid monthly, which may reduce the total debt but requires proven affordability or income. These are not interchangeable choices: they affect the net funds available on day one and the amount needed to clear the loan at exit.

Development finance for heavier conversion work

Where a scheme involves structural alterations, multiple new units, significant construction expenditure or a longer programme, development finance is often more appropriate. This is generally structured around the gross development value, or GDV, meaning the estimated value of the completed scheme.

A development lender may advance against the land or purchase price initially, then release build funds through staged drawdowns. Before each drawdown, a monitoring surveyor or quantity surveyor normally checks that the works claimed have been completed and that the remaining budget is adequate. This gives the lender control, but it also means a developer must plan cash flow carefully. You cannot assume the full build budget will arrive at completion.

Day-one LTV refers to the percentage advanced against the property’s value at the start. GDV-based lending considers the completed value as well, but it does not mean the lender will simply provide a high percentage of projected profit. Maximum leverage is constrained by day-one security, build costs, borrower experience, contingency, planning risk and the strength of the exit.

Development exit or refinance after practical completion

Once construction is complete, development exit finance can repay the development facility while units are sold or refinanced. It can relieve pressure where sales take longer than expected and prevent a rushed disposal. However, it adds another layer of borrowing costs and requires a clear route to redemption.

For retained units, a buy-to-let, HMO, commercial mortgage or specialist refinance may be more appropriate. The finished configuration matters. A lender may view a single dwelling, a block of flats, an HMO and mixed-use property through entirely different criteria, even if they began as the same building.

What lenders will want to see

A well-presented proposal gives the lender fewer reasons to pause. The essentials are a clear purchase price and valuation rationale, planning documents, a detailed schedule of works, contractor quotes, project timetable, CVs or experience evidence, and an explanation of the exit.

For larger schemes, include a development appraisal showing total costs, finance costs, contingency, GDV and profit. A sensible contingency is not a sign of weak planning. It is evidence that you understand conversion work can expose defects, utility issues, fire-safety requirements and planning conditions after completion.

Borrower structure also matters. Many investors acquire through an SPV limited company, while others use an established trading company or personal ownership. Lenders will check directors, beneficial owners, credit history, available deposit and any intercompany arrangements. Adverse credit or complex income does not always prevent funding, but it needs to be explained early rather than discovered during underwriting.

The numbers that can derail a viable-looking deal

A conversion can appear profitable until finance costs, tax, professional fees and a slower exit are included. Work from a full sources-and-uses schedule, not a headline loan percentage. Your sources are deposit, loan, investor equity and any cash contribution. Your uses include purchase, tax, legal fees, valuation, broker fees, works, contingency, interest and sales or refinance costs.

LTV means loan-to-value: the loan divided by the relevant property value. On a £500,000 purchase, a 70% day-one LTV equates to £350,000 before any deductions for interest or fees. That does not mean £350,000 lands in your solicitor’s client account. Retained interest, lender fees and legal costs can reduce net proceeds, so establish the actual cash available to complete.

If you are raising funds against an existing home or investment property, a second charge mortgage may be worth considering. It sits behind the existing first charge rather than replacing it. This can preserve a low fixed first-charge rate and avoid early repayment charges, or ERCs, on a remortgage. The trade-off is that it creates an additional secured debt and the first-charge lender may need to consent to the second charge. Affordability must support both payments.

Where commercial conversion cases commonly stall

In our experience arranging specialist property finance, the most common problem is not that a borrower has chosen the wrong loan product. It is that the stated project is less developed than the funding request suggests. Underwriters routinely query whether planning is implementable, whether build costs include VAT and professional fees, whether a contractor is properly appointed, and whether the proposed refinance works for the finished unit type.

Valuation is another pressure point. A borrower may have strong local comparables, but the valuer may take a more cautious view of commercial demand, residential end values or the impact of an unusual layout. If the deal only works at the highest projected GDV or with no delay, it is fragile. Build in headroom before you commit.

Timing also matters. Bridging can complete in as little as 5 to 10 days in the right circumstances, but valuation, legal title issues, planning checks and company documentation can extend the process. Do not exchange on a short contractual deadline assuming finance is guaranteed. Structure the facility, instruct solicitors promptly and disclose complications at the outset.

Getting the structure right before exchange

Your Financial Assurance compares specialist lenders and structures commercial conversion cases around the security, works and exit rather than forcing them into a standard mortgage application. With whole-of-market access to more than 90 lenders and 11,000-plus products, the practical work is matching the scheme to a lender whose appetite fits its current stage, then managing valuation, legals, drawdowns and lender queries through to completion.

Before offering on a commercial conversion, prepare a short funding pack and test the exit against a conservative valuation and realistic timescale. The right finance should give the project enough room to be completed properly, not simply get it over the line on purchase day.

Lending is subject to status, valuation and lender criteria. Unregulated bridging, buy-to-let and most development finance are not regulated by the Financial Conduct Authority.