Construction Industry Finance: A Complete Guide to Getting a Commercial Mortgage as a Contractor

If you work in construction and you’re looking to buy premises, whether that’s a yard, a workshop, a warehouse for materials, or an office to run your business from, you’ll quickly discover that lenders don’t treat contractors the same way they treat salaried applicants.

Your income might come from several sites at once, through a mix of contracts, subcontracted work and retained clients. Some months look excellent on paper. Others, after CIS deductions and materials costs, look thinner than the work you actually did. None of this makes you a bad borrowing risk, but it does mean the mortgage process asks different questions of you than it would of someone with a single payslip.

This guide walks through how commercial mortgages actually work for people in the construction trade: what lenders want to see, how your business structure affects what you can borrow, and the practical steps that tend to make an application go more smoothly.

What Counts as a Commercial Mortgage in This Context

A commercial mortgage is simply a loan secured against a non-residential property, or a mixed-use property where the primary purpose is business. For a contractor, that might mean a builder’s yard with storage, a small industrial unit for joinery or fabrication work, an office suite, or premises that combine a trade counter with storage space at the back.

It’s a different product from a residential mortgage, and it’s also distinct from a buy-to-let mortgage, because the property is being bought to trade from rather than to let out or live in. Lenders assess these applications on the strength of the business and the property together.

The property needs to be fit for the intended use, and the business needs to demonstrate it can service the debt over the life of the loan. That second part is where construction businesses often need to work a bit harder to present their case clearly.

Why Contractors Get Assessed Differently

Most commercial mortgage underwriting starts from an assumption of relatively stable, forecastable income. A contractor’s income rarely looks like that on the surface. You might have a mix of:

• Fixed-term contracts with main contractors or developers
• Ongoing subcontracted work that varies by season or region
• Retentions held back until snagging is signed off, sometimes for months
• Payments that arrive in irregular batches rather than a monthly rhythm

None of this is unusual within the trade, but a lender reading your accounts for the first time doesn’t automatically know that. They need to see the pattern behind the numbers, not just the numbers themselves. This is where two or three years of accounts, ideally prepared by an accountant familiar with construction, make a real difference.

A lender can look past a quiet quarter if the wider trend across several years shows consistent turnover and a sensible level of retained profit. It also helps to think about the application from the underwriter’s point of view. They’re not judging whether you’re good at your trade.

They’re judging whether the business, as a financial entity, can comfortably make the repayments even if a contract falls through or a client pays late. Anything that helps them see that clearly speeds the process up.

How CIS Affects Your Income Assessment

If you operate under the Construction Industry Scheme, either as a subcontractor having tax deducted at source or as a contractor making those deductions for others, this shapes how your income appears on paper and how a lender needs to interpret it.

Gross payments before deduction and net payments after deduction can look quite different month to month, and a lender unfamiliar with how the scheme works might misread a net figure as your actual earning capacity when it isn’t.

Getting CIS tax deductions explained clearly to your accountant, and having your accounts presented in a way that separates gross turnover from CIS deductions and other reductions, avoids confusion at the underwriting stage. It’s a small piece of preparation that saves a lot of back-and-forth later.

Where a broker is involved, flagging early on that your income runs through CIS is worth doing before an application goes in, rather than explaining it after a lender has already queried the figures.

Sole Trader, Partnership or Limited Company: Does It Matter?

Your business structure affects both what documentation a lender will ask for and, in some cases, which lenders will consider your application at all.

Sole traders and partnerships are usually assessed on personal tax returns (SA302s) and business bank statements alongside any accounts prepared. Because there’s no legal separation between the individual and the business, lenders will often look at personal financial history, including personal credit conduct, as part of the picture.

Limited companies are assessed primarily on company accounts, though most lenders will still want personal guarantees from directors, particularly for newer or smaller companies. This means your own financial history still matters even though the borrowing sits with the company.

A director’s personal credit record and the company’s trading history both come into play, and this is one of the areas where business credit scores genuinely influence the outcome, since a company with a thin or patchy credit file can raise questions even when turnover looks healthy.

Neither structure is inherently easier to get approved. What matters more is whether the accounts, however they’re organised, tell a clear and consistent story about the business’s ability to pay.

Documentation Lenders Typically Ask For

The exact list varies between lenders, but most commercial mortgage applications from contractors will need some combination of:

• Two to three years of accounts or tax returns
• Recent business bank statements, usually six to twelve months
• A schedule of current contracts or a pipeline of confirmed work
• Details of existing business debt, including any equipment finance or vehicle leases
• Proof of deposit funds and their source
• A valuation of the property being purchased

Where the business employs subcontractors or takes people on for larger contracts, some lenders will also want reassurance that basic employment compliance is in order. Getting right to work compliance checks documented properly across your workforce isn’t something most lenders ask about directly, but if it comes up during due diligence on a larger commercial deal, having it sorted already avoids an unnecessary delay right at the point you’re trying to move quickly on a property.

Deposit Requirements and What Affects the Rate

Commercial mortgage deposits are generally higher than residential ones. Where a residential purchase might need 5 to 10 per cent down, commercial lenders more commonly ask for somewhere between 20 and 40 per cent, depending on the property type, the lender’s own risk appetite and how established the business is.

A newer contracting business buying its first premises should expect to sit towards the higher end of that range, while an established company with several years of consistent trading may find lenders willing to work with a smaller deposit.

Interest rates for commercial mortgages are set on a case-by-case basis and vary between lenders, so there’s no single figure that applies across the market. What tends to influence the rate offered includes the loan-to-value ratio, the strength and consistency of trading history, the type of property and its resale liquidity if the lender ever needed to repossess, and the perceived risk of the sector.

Rates can be fixed or variable, and each carries a different kind of exposure: a fixed rate gives certainty over repayments but usually comes with early repayment charges if you want to move lenders later, while a variable rate can move with the base rate in either direction. Which suits you better depends on how much certainty you need against how much flexibility you want to keep.

Working With a Broker Versus Going Direct

Some contractors go straight to their business bank for a commercial mortgage, and for straightforward cases with an existing strong banking relationship, that can work perfectly well. A broker becomes more useful where your income is less conventional, where you’ve had a lender decline you and want to understand why before trying elsewhere, or where you simply don’t have the time to approach several lenders separately while running live sites.

A good commercial mortgage broker who understands construction will already know which lenders are comfortable with CIS income, which ones look favourably on limited companies with a short trading history, and which ones are more flexible on deposit size for certain property types. That knowledge can save weeks compared with approaching lenders cold.

Part of finding a broker worth using is asking around within the trade: building a professional network among other contractors and site managers often surfaces recommendations for brokers and lenders who have actually delivered for people in similar circumstances, rather than relying purely on online reviews.

Common Reasons Applications Get Declined or Delayed

A decline rarely comes down to one single issue, but a few patterns show up repeatedly in construction-related applications:

Inconsistent or unexplained gaps in trading history. A year with a big drop in turnover, without context, reads as risk rather than as the normal ebb and flow of contract work.

Weak personal or business credit history. Missed payments, high existing debt utilisation or a thin credit file can all raise flags, and this is another point in the process where business credit scores come into play, this time on the decline side rather than the assessment side, since a poor score can outweigh otherwise reasonable trading figures.

Insufficient deposit relative to the lender’s risk appetite for the sector. Some lenders are simply more cautious about construction as an industry than others, and a deposit that would be adequate with one lender may not clear the bar with another.

Property issues. Planning restrictions, unusual construction types, or a valuation that comes in below the agreed purchase price can all stall or sink an application regardless of how strong the borrower’s finances are.

Where an application is declined, it’s worth asking the lender or broker for the specific reason rather than assuming it was purely about affordability. Sometimes the fix is straightforward, such as increasing the deposit or waiting until the next set of accounts shows a fuller trading year.

Presenting Yourself as a Credible Borrower

Beyond the numbers, lenders and brokers do form an impression of how seriously a business is run, and small things contribute to that impression more than people often expect. Trade credentials are one example: for a business built around skilled tradespeople, holding the right qualifications signals a level of professionalism that goes beyond the accounts.

A contractor who can point to a properly held Carpenter CSCS Card or equivalent trade certification for key staff is demonstrating that the business takes standards seriously, which, while not a lending criterion in itself, can support the broader narrative during underwriting, particularly where a lender is weighing up a borderline case.

Similarly, clear management information, a tidy set of accounts, and evidence of forward contracts all help. None of these replace the fundamentals of affordability, but they reduce the friction and the questions an underwriter has to raise before they can say yes.

Getting Ready to Apply

If you’re planning to apply for a commercial mortgage in the next six to twelve months, the most useful thing you can do now is get your accounts and management information in order well ahead of time, rather than pulling them together once you’ve found a property.

Speak to your accountant about how your CIS income is presented, check your business and personal credit files for anything that needs correcting, and start putting together a clear picture of your contract pipeline. A contractor who walks into a lender meeting with organised, explainable figures is in a stronger position than one with a similar business but a messier paper trail, even where the underlying trading is just as sound.

Published by uk.crecso.com