The choice between an owner-occupier commercial mortgage and an investment commercial mortgage is not just a product decision, it reflects how the property will be used and who will occupy it. These two product types are underwritten differently, priced differently, and attract different lender appetite. We’d get the classification right before you approach a lender. That’s the call that sets your rate and your lender.
The Core Distinction
Owner-occupier: your business occupies the property and trades from it. When your business trades from the building it buys, the lender underwrites your accounts, turnover, profit and cash flow, because that income services the debt.
Commercial investment: the borrower lets the property to third-party tenants. Rental income is what services the debt. The lender underwrites the income stream and the property.
The same building can support either type depending on use. When a logistics firm occupies the warehouse it owns, that’s owner-occupier; let the same warehouse to a tenant through an investor landlord and it’s commercial investment.
How Underwriting Differs
| Owner-Occupier | Commercial Investment | |
|---|---|---|
| Primary income assessed | Business trading income (P&L, turnover) | Passing rent or ERV |
| Affordability metric | DSCR on business income | DSCR on rental income |
| Typical DSCR minimum | around 1.25x | around 1.25-1.35x |
| Typical max LTV | 65-75% | 65-70% |
| Trading history required | Yes, typically 2+ years | Less critical, property income is primary |
| Personal accounts assessed | Yes, directors’ income often reviewed | Sometimes, as a backstop |
| Occupancy requirement | Business must occupy (often 51%+) | Property must be tenanted or lettable |
Pricing Differences
We’d note owner-occupier commercial mortgages typically attract better rates than investment mortgages from high-street lenders. The reasoning: a business that occupies its own premises has a stronger incentive to maintain payments, losing the property means losing the place of business, not just a rental income stream. Occupiers fight harder to keep the keys; that’s the risk discount.
Specialist lenders are more consistent in their pricing across both categories, they are underwriting the property and income rather than the borrower’s business health in either case.
Lender Appetite
We’d say high-street banks tend to favour owner-occupier commercial mortgages, particularly for existing business customers. Commercial investment is more common territory for specialist lenders, though high street banks do offer it for standard property types with strong tenants.
Specialist lenders (Shawbrook, Paragon, InterBay, Together) are more active in commercial investment, particularly for complex property types, portfolio investors, and semi-commercial.
Can a Property Switch Between Categories?
Yes, the mortgage type must match the use at application and throughout the term. If you take an owner-occupier mortgage and then lease the property to a third party, you are typically in breach of your mortgage terms. Change the use, change the facility. Lenders require notification of any change in use, and a switch from owner-occupier to investment would usually require a new facility (or formal consent) at revised terms.
Which Is Right for You
Take an owner-occupier mortgage if: you are buying your own premises, you have 2+ years of profitable trading, and your business will primarily occupy the property.
Take a commercial investment mortgage if: you are buying the property as a rental investment, rental income from tenants is what services the debt, or you are a property investor or portfolio landlord rather than a trading business.
The hybrid case: when your business occupies part of the property and lets the rest, you are in mixed-use territory. Some lenders accommodate this within an owner-occupier structure (with the rental income as additional support); others require a semi-commercial or investment assessment. Discuss the configuration and proportion with a broker before you approach lenders.
Related Pages
- Owner-Occupier Commercial Mortgages
- Commercial Investment Mortgages
- Semi-Commercial Mortgages
- Commercial Mortgage Rates
- DSCR Explained
- Best Commercial Mortgage Lenders UK