What defines premium
Kitchen budget £30k-£60k (Bulthaup, Boffi, or equivalent). Bathrooms £15k-£35k each (Vola/Dornbracht/Duravit). Solid oak boarded floors. Triple glazing in composite or aluclad frames. MVHR with summer bypass. Smart lighting and AV pre-wire throughout. Often basement, gym, or pool. Bespoke joinery and statement staircase.
Current £/sqm range
BCIS Q2 2026 premium small-residential £2,800-£3,500/sqm UK average[BCIS Q2 2026]. Surrey 1.28x lands £3,580-£4,480/sqm. Inner London (1.45x base, often +15-25% on top for inner zones) £4,000-£5,500/sqm typical.
Where premium spend returns on resale
Kitchen and primary bathroom carry the strongest return. Basement gym or pool returns under 50% of spend on resale in most cases (built more for lifestyle than valuation uplift). Glazing quality reads to buyers; flooring quality does not always. Bespoke joinery is a personal-taste item that next-buyer often replaces.
Common over-spends that do not add value
Smart-home wiring at the brand-leader specification that becomes legacy within 5 years. Multi-zone audio. Cinema rooms (low resale demand). Basement pool (cap-ex high, op-ex higher). Bespoke external lighting. Heated driveways. Bench-test each spend against resale comparables before committing.