Commercial Mortgage vs Bridging Loan: Which to Use for Property
Mark Grant
Relationship Manager · Apr 25, 2026 · 7 min read
When a UK business or property investor needs to finance a commercial property purchase, the choice between a commercial mortgage and a bridging loan depends primarily on three factors: how quickly the funds are needed, the condition of the property, and whether the long-term costs justify a longer arrangement process.
When a commercial mortgage is the right choice
A commercial mortgage is the right choice when the property is in good condition and lettable or owner-occupied, when there is no urgency (6-10 weeks is acceptable), and when the long-term holding of the property justifies the lower ongoing cost of mortgage finance. Rates on commercial mortgages are significantly lower than bridging rates over extended periods, and terms of 5-25 years make monthly payments manageable.
Owner-occupied commercial mortgages (where the borrowing business occupies the property) are available at LTVs up to 75 percent and rates typically starting from Bank of England base rate plus 1.5-3 percent. Investment commercial mortgages (where the property is let to a third party) have similar rates but the assessment focuses more on rental yield and tenant quality.
When bridging is the better choice
Bridging finance is the right choice when: the property is being purchased at auction (28-day completion required), the property is in a condition mortgage lenders will not accept, the purchase is time-critical and cannot wait 6-10 weeks, or the buyer plans to refurbish and resell within 12 months. Bridging is also used to break property chains: buying the new property with a bridge before the existing property has sold.
The speed advantage of bridging (typically 5-10 working days to completion) has genuine commercial value in competitive markets. An auction property that would cost 350,000 pounds at auction may be worth 450,000 pounds fully refurbished, making 6-9 months of bridge interest at 0.75 percent per month a worthwhile cost to access that margin.
"The choice between bridging and a commercial mortgage is rarely permanent. Used in sequence, they complement each other to solve the same problem more efficiently than either can alone."
- Mark Grant, Relationship Manager, Spark Finance
The cost difference: a comparison
On a 500,000 pound commercial property purchase: a commercial mortgage at 5 percent APR over 20 years has monthly payments of approximately 3,300 pounds and total interest over 20 years of approximately 292,000 pounds. A bridging loan at 0.75 percent per month for 9 months (as a bridge to a commercial mortgage) costs approximately 33,750 pounds in interest plus arrangement fees of approximately 7,500 pounds, total approximately 41,250 pounds for the bridge period.
The bridge adds approximately 41,000 pounds to the total financing cost versus going straight to a commercial mortgage. Whether this is worth it depends on what the speed or condition flexibility of the bridge enabled: if it allowed a below-market acquisition or a profitable refurbishment, the cost is easily justified.
Bridging to a commercial mortgage: the common sequence
Many commercial property transactions use bridging and commercial mortgages in sequence. A bridge is used to acquire or refurbish the property quickly, and then refinanced to a commercial mortgage once the property is in the right condition and a lender has been identified. This sequence is well-understood by lenders and straightforward to arrange when the exit to a commercial mortgage is planned from the start.
Spark Finance can arrange both the bridging facility and the commercial mortgage refinancing, with the two facilities structured to transition smoothly. Planning the commercial mortgage lender and terms before drawing the bridge ensures there is no gap between the bridge expiring and the mortgage completing.
The bottom line
Spark Finance arranges both bridging loans and commercial mortgages, including the transition between the two for property acquisitions and refurbishments. Apply at apply.sparkfinance.co.uk to discuss your property finance requirements.
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