InterBay Commercial
The commercial arm of OSB Group, lending owner-occupier commercial mortgages from £125k to £25m through brokers, with published rates and a one-day agreement in principle.
What they do
InterBay lends against commercial property occupied by the trading business that owns it, at up to 75 per cent loan to value, underwritten on the trading company's adjusted profit rather than on rental income alone. Rates on £2.5m to £25m loans start around 6.59 per cent fixed for two years or 6.99 per cent for five at 65 per cent leverage, with arrangement fees tiered by size and a published reversion margin. Service levels are published too: an agreement in principle within a working day, initial underwriting in about three days, formal offer review in two. Distribution is broker-only across England and Wales.
Where they fit in a lower-mid-market raise
Where an acquisition or refinance includes the freehold a business trades from, this is one of very few lenders that will write up to £25m against owner-occupied premises and underwrite the operating business behind them. Published rates and service levels make it straightforward to build into a funding plan before terms are formally requested.
Where they are not the fit
It cannot fund the operating company or goodwill portion of a buyout, only the real estate. Lending is limited to England and Wales, and properties with combustible cladding, defective construction or Grade I listing are excluded. Access is through brokers only, and loans above £10m are priced on application.
Published terms
- Pricing
- Commercial owner-occupier from 6.59% (2-years fix) or 6.99% (5-years fix) at 65% loan to value on £2.5m-25m loans with 3% fee; reversion BBR + 4.00% (0% floor); arrangement fees 1-3% by size tier (0.25% cut for existing borrowers) + £145 admin fee.
- Speed to terms
- Published SLAs: AIP within 1 working day, initial underwriting ~3 days, formal offer review ~2 days (bridging AIP ~4 hours)
- Sponsored or sponsorless
- Owner-managed and corporate borrowers, with no private-equity sponsor proposition
- Where they lend
- (England & Wales only for commercial; Scotland/Northern Ireland/CI/IoM excluded per lending criteria)
- How they decide
- Broker-only submission with dedicated case manager and regional BDM network; manual case-by-case underwriting, no automated scoring. Loans £10m+ priced on application (implies referral/credit sign-off)
- Covenants
- Maintenance covenants, tested every period
- Personal guarantee
- Typically required
- Search funds and ETA
- No published route for search-fund or first-time acquirer borrowers
As published by the lender and last reviewed June 2026. Terms quoted on a deal are set by the credit, not by a published band.
What rules a deal out
Stated limits, taken from InterBay Commercial’s own published criteria. A limit is where a lender starts from, not where it always ends: several of these move on a strong enough credit.
- Not-owner-occupied-trading-premises
- Over-75-pct-ltv
- Combustible-cladding
- Grade-1-listed
- No appetite in combustible-cladding, defective-construction or grade-1-listed
How they sit against the category
- Its published ceiling is £25m; 27 of the 75 property-backed lenders here go at least as high.
- 65 of the 75 publish an indicative price at all; it is one of them.
Counted across the 75 property-backed lenders in this directory, on what each one publishes. What a lender discloses and what it will do are different things.
Questions this page answers
How large a facility does InterBay Commercial write?
Published facilities reach £25m, and the bottom of the published range is small-ticket business rather than a corporate facility. A band is what a lender states it will do, not what it will do on a given credit.
Does InterBay Commercial require a personal guarantee?
On InterBay Commercial's published terms, a personal guarantee is typically required. What a lender asks for on a given credit is settled in the documents, not by a published stance.
How quickly does InterBay Commercial move?
Published SLAs: AIP within 1 working day, initial underwriting ~3 days, formal offer review ~2 days (bridging AIP ~4 hours). Published timetables describe a clean case; anything unusual in the security or the structure adds to them.
On the record
March 2026: Commercial criteria refresh - 75% of market value (from lower of MV/VP value), semi-commercial residential threshold 55%->50%, min-lease and 60-month residual-lease requirements removed, vacant units and first-time landlords admitted; cheaper pricing and larger loans (mortgagesolutions.co.uk.
Sources: mortgagesolutions.co.uk
This profile is a curated reference note drawn from public sources, not financial advice or a recommendation. Appetite and terms change; a lender's fit for a given credit is established by approaching it, not inferred from a page.