Semi-Commercial Mortgage Cambridge
Single-facility finance for property where the residential element is at least 40% of total floorspace: the shop-with-flat archetype that defines Cambridge inner-ring parades. Up to 75% loan-to-value, blended cover ~145%, interest rates 6.5 to 8.5% pa, 5 to 25 year repayment terms. Active across Mill Road, Romsey, Petersfield, Newnham and the Chesterton parade.
LTV
Up to 75%
Rate
From 6.5% pa
Term
5 to 25 years
Blended cover
~145%
Defining mixed-use property: when does semi-commercial pricing apply?
Semi-commercial finance is a single facility funding mixed-use property, typically a commercial unit on the ground floor with one or more self-contained residential flats above. Where the residential element is at least 40% of total floorspace, semi-commercial pricing applies (instead of pure commercial investment pricing). Where residential is below 40%, lenders treat it as commercial investment and price accordingly.
The lending test combines the commercial rent and the residential AST income on a blended basis, with a typical cover requirement around 145%. Lenders take comfort from the residential security: a flat above is easier to re-let than a vacant retail unit if the commercial side falls vacant, so semi-commercial routinely prices 50 to 100bps inside pure commercial investment. Loan-to-value to 75% is achievable on standard archetypes via specialist desks.
Specialist lenders dominate this market. InterBay Commercial (OSB Group) and Shawbrook are the two most active named desks; LendInvest and Cynergy Bank also run active programmes for Cambridge semi-commercial deals between £250K and £2.5M. Limited company SPV structures are standard; individual investor and LLP variations are equally accommodated.
Regulation matters here. Most semi-commercial lending is unregulated commercial: the borrower is a limited company or investor, the residential flats are let on ASTs to third parties. The exception: where the borrower (or an immediate family member) will personally occupy one of the flats, the deal can fall into FCA-regulated mortgage rules and routes to a regulated commercial lender. Stamp duty land tax follows non-residential rates on the whole property where commercial use is genuinely incidental, which is materially cheaper than residential SDLT and is part of why investors favour the structure. Indicative case seed: a Mill Road shop with three flats above at £900K, blended rent £55K pa, structured at 70% LTV (£630K facility) with InterBay or Shawbrook at around 7.0% pa.
Underwriting steps for a Cambridge shop-and-flats deal
1. Tenancy and split review
We check residential/commercial floorspace split, leases on the commercial side, ASTs on the residential side, tenant covenant on each.
2. Indicative terms in 48 hours
Three to four specialist semi-commercial lenders quoted: interest rate, loan-to-value, term, fees.
3. Credit pack
Lease pack, AST pack, property file, borrower SPV (or individual) pack. InterBay and Shawbrook want clean tenancy evidence.
4. RICS Red Book valuation
Separates commercial value, residential value and total. Estimated rental value on the commercial unit important to the cover test.
5. Credit approval
Specialist desks typically approve in 1 to 2 weeks post-valuation.
6. Legal completion and SDLT
Standard mixed-use conveyancing. Stamp duty at non-residential rates applies on the whole. 3 to 5 weeks typical.
Buyer profiles for the shop-with-flat archetype
- Investors buying classic shop-with-flat-above stock on Mill Road, Romsey high street and Chesterton parade
- Petersfield and Newnham investors with high-value upper-floor residential above ground-floor retail or professional services
- Limited company SPV landlords refinancing semi-commercial holdings off maturing 5-year fixes
- Portfolio investors with a mix of pure commercial and semi-commercial assets across the CB postcodes
- Cambridge F&B operators with operator flat above (where the operator lives in the flat)
- Mixed-use conversion deals where consent is for ground-floor retail plus four to six flats above (Mill Road, central Cambridge)
- First-time semi-commercial investors moving up from a residential buy-to-let portfolio
- Retiring landlords selling individual semi-commercial assets to incoming Cambridge portfolio investors
Active Cambridge semi-commercial parades and lender behaviour
Semi-commercial is a deep, active product across Cambridge. The classic inner-ring parades, Mill Road (CB1), Romsey Town, Petersfield, Newnham and the Chesterton parade, run on shop-with-flat-above stock backed by exceptionally durable residential demand from the ~24,000 University of Cambridge students, ~30,000 Anglia Ruskin students and the post-doc and NHS / Addenbrooke's workforce. Lot sizes are typically £400K to £1.2M for a single parade unit, often £1.5M+ for a Mill Road four-unit run with multiple flats above. Gross blended yields run firmer than the regional UK average given the city's tight residential market: typically 6.5 to 8% blended in central CB1 and CB2, slightly wider on the Chesterton and Cherry Hinton fringe. The Mill Road sub-market is distinctive: independent F&B and retail operators with long trading history sit alongside high-demand residential lets, producing reliable blended income. Lender appetite is strong: InterBay Commercial, Shawbrook, LendInvest and Cynergy Bank all actively quote on Cambridge semi-commercial deals, with the clearing banks reserving their cheaper pricing for owner-occupier rather than investment versions of the product. Cambridge & Counties Bank engages selectively on local stock.
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