2026 construction cost guides
Real 2026 UK prices for every major project type — loft conversions, house extensions, full refurbishments, kitchens and bathrooms. Per-m² rates, regional variation, what’s included and what isn’t. All figures are live RCB Design & Build delivery costs from the last 18 months.
- Cost Guide
Loft conversion cost in 2026 — full UK price guide
How much does a loft conversion cost in 2026? Full price guide for Velux, dormer, L-shaped, hip-to-gable and mansard conversions across the UK.
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House extension cost in 2026 — full UK price guide
How much does a house extension cost in 2026? Full price guide for rear, side, side-return, wrap-around and double-storey extensions across the UK.
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Full house refurbishment cost in 2026 — UK price guide
How much does a full house refurbishment cost in 2026? Per-m² rates, scope breakdowns, regional variation, what's included — RCB Design & Build guide.
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Kitchen extension & renovation cost in 2026 — UK price guide
How much does a kitchen extension or renovation cost in 2026? Full cost breakdown for design, build, units, worktops, appliances — RCB Design & Build.
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Bathroom renovation cost in 2026 — UK price guide
How much does a bathroom renovation cost in 2026? Full price guide for ensuite, family bathroom, wet rooms and luxury bathrooms across the UK.
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