The commercial advantage — and what it demands
Income-driven valuation
Commercial assets are priced off their income stream: value ≈ contracted rent ÷ net initial yield (NIY). A unit let at £35,000 a year at a 7% NIY is worth ~£500,000. This makes value analysable — and improvable — in a way residential comparables are not.
FRI leases shift the cost burden
Under a full repairing and insuring (FRI) lease, the tenant bears repairs, buildings insurance and business rates. The landlord's gross-to-net leakage is minimal compared to residential, where maintenance, voids and compliance all erode the headline yield.
Lease length and WAULT
Commercial leases commonly run 5–15 years, and a building's WAULT (weighted average unexpired lease term) is a core pricing metric. A long WAULT to a strong tenant means bond-like income; a short one means reletting risk — and repricing opportunity.
Covenant strength is underwritable
Your tenant's ability to pay is assessable before you buy: filed accounts, credit ratings, parent-company guarantees. A blue-chip covenant on a 10-year FRI lease materially de-risks the income in a way no residential tenancy can.
Upward-only rent reviews and indexation
Institutional leases typically include five-yearly upward-only rent reviews, or RPI/CPI-linked uplifts. Contracted rental growth compounds into capital value through the yield — the engine of the rent-to-value lever below.
Reversionary potential
When the passing rent sits below the market rent (ERV), the asset is reversionary: the gap is future value waiting to be captured at review, renewal or reletting. Spotting under-rented assets is the classic private-investor edge.
The investor's ledger: tax and cost treatment
| Factor | Commercial property | Residential reference |
|---|---|---|
| Stamp duty (SDLT) | Capped at 5%, no second-property surcharge | Up to 12%, +5% surcharge on additional dwellings |
| Mortgage interest | Fully deductible against rental profits | Restricted to a 20% basic-rate credit (Section 24) |
| Capital allowances | Claimable on plant & machinery and integral features (lifts, heating, electrics) | Not available for standard lets |
| Repairs, insurance & rates | Typically paid by the tenant under FRI (full repairing and insuring) leases | Paid by the landlord |
| What drives the value | Rental income and lease strength: value ≈ annual rent ÷ yield | Comparable sales and buyer sentiment |
The rent-to-value lever
Because commercial value is priced off income, raising the rent raises the value directly. Add £10,000 of annual rent at a 7% yield and the property is worth roughly £143,000 more. Rent reviews, lease re-gears and re-letting to stronger covenants are how commercial investors manufacture value — an option residential owners simply don't have.