Commercial Investment Mortgages: How to Finance Office, Retail & Mixed-Use Property

Are you a buy to let property owner, thinking about diversifying beyond the traditional buy-to-let? Property investors can turn their attention to commercial property such as offices, retail units, and mixed-use buildings as part of their broader portfolio strategy.

It’s a different world to residential lending. But with the right guidance, it doesn’t have to be a complicated one.

Here’s what you need to know.

What is a commercial investment mortgage?

A commercial investment mortgage is a loan secured against a property that isn’t used as a private residence to then be let out to businesses. Unlike residential mortgages, commercial lending is assessed differently: lenders will look closely at the income the property generates, the strength of any tenants in place, the lease terms, and the experience of the borrower, sitting outside of the FCA’s MCOB framework.

Every case is different. There’s no one-size-fits-all approach criteria.

Bridging loans can be commonly used for these transitioning periods. For more information regarding bridging finance, click here.

What is a commercial owner-occupied mortgage?

An owner-occupier commercial mortgage is a commercial mortgage used by business owners to purchase, or refinance property that their own company will operate from. Unlike investment properties, underwriting often focuses on your business’s trading performance and cash flow: instead of rental yields, lenders will consider your company’s net profits, EBITDA, and turnover to ensure the business can cover the monthly mortgage payments. Many lenders will apply a Debt Service Coverage Ratio (DSCR) to evaluate your business income.

So, Office, Retail & Mixed-Use: Are They Treated the Same?

Not quite. Each property type comes with its own lending considerations.

Office properties: Lenders will want to understand occupancy levels, lease lengths, and the quality of tenants in place. A well-let office with a long lease will always be viewed more favourably than a vacant one, possibly due to working patterns having shifted.

Retail units are assessed on similar grounds: location, tenant strength, and lease terms all matter. High street units can still attract lender interest, particularly where rental income is demonstrably stable.

Mixed-use properties (part commercial, part residential, for example) are popular choices for investors looking to diversify income from a singular asset. These are typically financed using semi-commercial mortgage products, designed specifically for this type of property. Lenders assess both the commercial and residential income streams, and the ratio between the two can affect the options available to you. In addition, where any part of the property is occupied by the borrower as their main residence, the mortgage may fall within FCA regulation as a regulated mortgage contract, another distinction that affects both product selection and advice obligations.

It’s important to talk to a specialist to understand your options.

How are these mortgages assessed?

The key things lenders consider include:

Loan to Value (LTV): Commercial lenders typically work to lower LTVs than on residential property. The actual amount available will depend on the property, its income, and the overall risk profile of the application.

Rental income coverage: Lenders assess whether the rent covers the mortgage repayments by a sufficient margin, typically applied at a stressed interest rate rather than the headline rate being offered. For limited company borrowers, most lenders require rental income to cover at least 125% of the mortgage payment. For personal name borrowers, this typically rises to 140-145%. These figures vary by lender and are not regulatory minimums: individual lender criteria should always be confirmed directly.

Tenant and lease quality: A property with a strong, established tenant on a long lease is a very different proposition to one that is vacant or let on a short-term arrangement. Lease length and tenant covenant strength carry real weight in how lenders price risk.

The borrower’s experience: Lenders will also consider your background as a property investor. First-time commercial investors may find their options more limited, though some lenders will consider applications on individual merits.

Ready to Explore Your Options?

Commercial property finance is a more specialist area, and the right structure for any investment will depend on your broader portfolio objectives.

At The Buy to Let Broker, our team are experts in working with investors and specialist lenders across commercial and semi-commercial lending. We’ll take the time to understand the situation and work to identify the most suitable options available.

Thinking about a commercial investment mortgage case? Speak to one of our specialists today.