Warehouse term loans and investment mortgages explained

A commercial investment mortgage is a long-term loan secured on an income-producing property that you let to a tenant. For an investor buying a warehouse, an industrial unit or a distribution shed to hold and rent out, it is the core piece of funding, the term loan that sits behind the asset for years and is repaid from the rental income the building produces. We arrange commercial investment mortgages across the UK, and as an introducer rather than a lender we take your case to the market and compare what each lender will offer.

This guide explains how a commercial investment mortgage works, how it differs from an owner-occupier commercial mortgage, how much you can borrow against the rent, what rates and terms to expect, and how to refinance when the deal ends. We also answer the questions investors ask most often, including how lenders treat older borrowers and just how difficult the whole process really is. The aim is to give you a clear picture before you commit, because a commercial mortgage of this kind is a long relationship and getting the structure right at the start saves money over its life. A small difference in rate or term, compounded over decades, adds up to a meaningful sum.

What is a commercial investment mortgage?

A commercial investment mortgage is a long-term loan used to buy or refinance a commercial property that is let to a tenant and held for rental income rather than occupied by the borrower's own business. The defining feature is the source of repayment: the rent the tenant pays is what services the loan. The lender is therefore lending against the income stream as much as against the bricks, and the quality of that income shapes everything from the rate to the maximum loan.

This is the key line that separates an investment mortgage from an owner-occupier commercial mortgage. With an owner-occupier loan, the business that runs from the building also repays the debt, so the lender looks at trading profit. With an investment mortgage, a third-party tenant occupies the warehouse or industrial unit and the investor is the landlord, so the lender looks at the lease, the rent and the tenant's strength. The same building can be financed either way depending on who occupies it.

A commercial investment mortgage can fund a single warehouse or a portfolio of industrial units, and it can be used to buy a new asset or to refinance one you already own. The structure is broadly the same in each case: a long-term loan, secured by a first charge over the property, with the rent doing the heavy lifting on repayment. Investors hold these assets to earn an income and to gain from any rise in value over time, and the mortgage is the lever that lets a relatively modest deposit control a much larger asset.

Warehouse and industrial assets suit investment lending well. Leases tend to run for solid terms, the buildings are simple to value, and demand for logistics and distribution space has kept rental income resilient. That combination gives a lender confidence, which generally translates into a competitive rate for a well-let unit. It is one reason a commercial mortgage on an industrial investment is often easier to place than the same loan on a more specialist building.

How is an investment mortgage different from an owner-occupier loan?

The distinction turns entirely on who occupies the property and where the repayment comes from. An owner-occupier buys a unit to trade from, and the lender underwrites the business behind the building, reviewing accounts and profit to be sure the trade can cover the loan. An investor buys a unit to let, and the lender underwrites the rental income instead, reviewing the lease, the rent and the covenant strength of the tenant.

That changes what a lender wants to see. On an owner-occupier deal the conversation is about turnover, margins and trading history. On an investment deal the conversation is about the length of the lease, whether rent reviews step the income up over time, and how likely the tenant is to keep paying. A long lease to a strong tenant on a modern warehouse is close to ideal, because the income is both durable and predictable.

It also changes the maximum loan and the deposit. Owner-occupier lending often reaches a higher loan to value because the lender takes comfort from the business occupying its own premises. Investment lending tends to sit a little lower, with a larger deposit expected, because the lender is one step removed from the property's use and relies on the tenant continuing to pay rent. The deposit on an investment deal is therefore usually the bigger commitment.

There is also a middle ground worth knowing about. A semi-commercial property, such as an industrial unit with an attached office or living space, can sit between the two and is financed on its own type of commercial mortgage. Where you sit on this spectrum shapes which lenders will look at the case, and we match the deal to the lenders most comfortable with that profile rather than sending it everywhere and hoping.

How much can you borrow against the rent?

Two numbers set the borrowing limit on a commercial investment mortgage: the loan to value and the rental cover. Loan to value, or LTV, is the loan as a percentage of the property's value, and investment lending commonly sits up to around seventy percent, which means a deposit of about thirty percent. The valuation a lender uses is its own surveyor's figure, not the price you agree, and a cautious valuation will pull the maximum loan down and push the deposit up.

Rental cover is usually the tighter test and is measured by the debt service cover ratio, often written as DSCR. This compares the rental income to the loan repayment, and lenders typically want the rent to cover the repayment by a comfortable margin, frequently around 125 percent or more, so that the income still covers the loan if a rate rises or a void appears. Where the rent is strong relative to the price, rental cover is easy and loan to value becomes the binding limit. Where the rent is thin, cover bites first and the loan is capped below the loan to value ceiling.

A lender runs both calculations and lends to the lower result. We model the loan to value and the rental cover before approaching the market, so the investor knows the realistic maximum and the deposit required before any offer is on the table. Getting the valuation and the rent right is the heart of the whole exercise.

What do you need to qualify and what should you watch?

Beyond the property itself, a lender assesses the borrower behind the deal. It will review your experience as a landlord, your wider financial position and any existing portfolio, and it will run credit checks on the borrowing entity, whether that is you personally or a company set up to hold the asset. A clean track record makes the case straightforward; a thin one does not rule out a commercial mortgage, but it narrows the field of lenders and may sharpen the rate or lower the loan to value on offer.

The single biggest risk on an investment mortgage is the income drying up. If a tenant leaves and the warehouse sits empty, there is no rent to cover the repayment, so the investor has to fund the loan from their own resources until a new lease is signed. Lenders price and size loans with that void risk in mind, which is exactly why the rental cover is set with a margin above the repayment rather than at break-even. A spread of tenants across a portfolio, or a single very strong covenant on a long lease, both reduce that exposure.

Interest rate risk is the other watch point. If you take a variable rate or come to the end of a fixed period, the repayment can rise, and a higher rate eats into the cover the rent provides. Building in headroom, choosing the right balance of fixed and variable, and planning the refinance ahead of time are how investors keep the loan comfortable through the cycle. We flag these risks openly at the outset rather than after the deal is done.

What rates and terms apply to a commercial investment mortgage?

Pricing on a commercial investment mortgage reflects the risk the lender takes, so the rate moves with the loan to value, the lease length and the strength of the tenant. A well-let warehouse on a long lease to a solid tenant attracts a keener rate than a unit with a short lease or a weaker covenant. Investment rates are typically a touch higher than owner-occupier rates, because the lender depends on a third-party tenant rather than the borrower's own trade.

You usually choose between a fixed rate and a variable rate. A fixed rate locks the interest rate for a set period and gives certainty over the repayment, which suits an investor who wants the cash flow nailed down. A variable rate tracks an underlying base rate and can be cheaper at the outset but moves with the market. Alongside the rate there is an arrangement fee, a valuation fee and legal costs, and we always weigh the total cost rather than the rate alone, because a low rate paired with a heavy fee is not always the cheaper deal.

Terms on a commercial mortgage of this kind are long, frequently fifteen to twenty-five years, which keeps the monthly repayment manageable against the rent. The longer the term, the lower each repayment, though more interest is paid over the life of the loan. Many investors take a long term for cash flow and then overpay or refinance when it suits, keeping flexibility while the rent covers the loan comfortably. A handful of lenders will stretch the term further still where the lease supports it, which can help an investor focused on income today.

Should you choose capital and interest or interest only?

There are two ways to structure the repayment, and the choice shapes both your monthly cost and what you owe at the end. A capital and interest loan, sometimes called repayment, pays down a slice of the debt with every payment, so the balance falls steadily and the loan is cleared by the end of the term. The monthly cost is higher, but you build equity in the property and owe nothing when the term finishes.

An interest-only loan pays just the interest each month, leaving the full balance outstanding at the end. The monthly repayment is lower, which lifts the rental cover and frees up cash, but the original loan still has to be repaid at the end, usually by selling the property or moving to a new facility. Many investors prefer interest only because it maximises the income the asset throws off while they hold it.

Some lenders offer a blend, interest only for an early period then switching to capital and interest, or part of the loan on each basis. The right choice depends on whether your priority is monthly income now or a cleared loan later. We talk this through against your plans for the asset before we approach a lender, because it affects which lenders will even quote.

How do you refinance or remortgage a warehouse investment?

Most investors do not hold the same loan for its full term. When a fixed rate period ends, when the value has risen, or when a better deal appears, you refinance, replacing the existing loan with a new one. A remortgage onto a new lender, or a new product with the same lender, can lower the rate, release equity that has built up, or move an interest-only loan onto a repayment basis to start cutting the balance.

Refinancing an investment property turns on the same two numbers as the original loan: the current valuation and the current rental income. If the warehouse has risen in value or the rent has stepped up at a review, the rental cover improves and you may be able to borrow more or secure a sharper rate. If values have softened, the new loan to value may be tighter, so timing the remortgage around the lease and the market matters.

We watch the calendar for investors, because the weeks before a fixed rate expires are the moment to act, not after the loan has dropped onto a lender's standard variable rate. Approaching the whole market at that point, with up-to-date figures on the rent and the valuation, is the surest way to keep the cost of finance down across the years you hold the asset.