Mixed-Use Shop + 3 Flats, Brighton

Ground-floor retail (140 sqm NIA) plus 3 two-bed flats above, Brighton North Lanes. NOI on retail £28,000 capitalised at 6.5 percent net initial yield. Resi 3 x 350k. Total GDV 1.48m. Mixed-use SDLT non-residential rates apply.

Commercial GDV

Gross retail rent £32,000. Op-cost ratio 12 percent (service charge, insurance, voids). NOI £28,000. Capitalised at 6.5 percent net initial yield: £430,700 capital value.

Residential GDV

3 x 2-bed flats at £350,000 each = £1,050,000.

Residual ledger
Commercial GDV (NOI 28k / 6.5% yield)
£430,700
Residential GDV (3 x 350k)
£1,050,000
Total GDV
£1,480,700
Build cost (320 sqm x £2,550/sqm mixed)
(£816,000)
Professional fees (12%)
(£97,920)
Planning + s106 (no CIL on small mixed-use)
(£18,000)
Contingency (10%)
(£93,192)
Finance interest (10%, 16 months, 50% avg)
(£68,275)
Subtotal costs
(£1,093,387)
Target profit (22% PoC)
(£240,545)
Residual before SDLT gross-up
£146,768
SDLT non-residential 2% over 150k threshold (no surcharge)
Max land bid
£143,890
VerdictAPPROVED (modest land bid; depends on owner-vendor appetite)

Why mixed-use SDLT helps

Land with a genuine mixed-use at completion is non-residential SDLT: top rate 5 percent versus residential 5 percent surcharge ladder. On a 144k land bid the SDLT saving versus pure-residential is roughly 4 to 5k. Marginal but real.

BCIS General Building Cost Index Q2 2026· Q2 2026Appraisal model reviewed by Oliver Wakefield-Smith (data integrity) with chartered-surveyor (MRICS) and CTA tax review. No affiliate links.