Commercial mortgage vs buy-to-let
Where does a buy-to-let mortgage end and a commercial one begin? Here is the line, and how to tell which your property needs.
Updated August 2026 · 5 min read · By Housn Capital
Where the line falls
A buy-to-let mortgage is designed for straightforward residential lettings — a house or flat let to tenants. A commercial mortgage covers business property and more complex investment. The two overlap at the edges, and plenty of property investors find themselves drifting from one into the other as their portfolio grows.
When it becomes commercial
Larger HMOs
Houses in multiple occupation, especially bigger ones, often sit outside standard buy-to-let and into commercial or specialist lending.
Mixed-use property
A shop with a flat above is semi-commercial, not buy-to-let.
Portfolio lending
Holding many properties, often through a company, can be handled on a commercial or portfolio basis.
Business premises
Anything let to a business, such as a shop or office, is commercial by nature.
Why the distinction matters
The category changes which lenders will look at the deal and how they assess it. A standard buy-to-let is a well-trodden, competitive market. Commercial and specialist lending is more bespoke — judged case by case on the property, the income and the borrower. Knowing which side your property falls on saves you knocking on the wrong doors.
Work out which you need
If your property sits in the grey area between buy-to-let and commercial, a specialist can place it correctly. Housn Capital introduces you to a broker who can tell you which route fits and match you to the right lender. Tell us about the property to get matched.
Frequently asked questions
Buy-to-let covers standard residential lettings — a house or flat let to tenants. A commercial mortgage covers business property and more complex investment. Larger HMOs, mixed-use and portfolios often cross into commercial.
Next step
Thinking about commercial for a project?
Tell us a little about your deal and we’ll introduce you to a specialist broker who can talk through the options.
Housn Capital Limited. Not FCA regulated. B2B non-regulated lending only. Company No. 16418877. General information, not financial advice.