Kitchen Extension Cost UK

Figures are typical UK averages including labour, materials, and VAT at 20% for standard-rated work.

Typical UK Cost Ranges for Kitchen Extension

All prices are approximate UK averages including labour, materials, and VAT at 20% (2026). Some qualifying renovations for empty homes may use the reduced 5% VAT rate.

Real UK Cost Examples

• Budget scenario (bungalow, Sheffield): focused essentials and practical finishes. Not done: major layout or structural changes. Approx cost: £33,250 to £52,000.
• Mid-range scenario (typical homeowner, 2-bed flat): balanced specification with core upgrades and reliable materials. Approx cost: £55,250 to £74,750.
• High-end scenario (3-bed semi): premium materials and wider scope with higher coordination demands. Main cost drivers: specification level and complexity. Approx cost: £78,000 to £126,000.

What You Can Get For Your Budget

• Around £45,500: core refresh and essential upgrades, usually with no major layout change.
• Around £65,000: balanced refit scope with better materials and targeted performance improvements.
• £97,500+: wider flexibility on finish quality, scope depth, and more complex works.

Hidden Costs to Watch For

• Access constraints, parking, and logistics frequently raise final labour costs in UK projects.
• Waste removal, making-good, and repeat trade visits are common late-budget increases.
• Compliance and certification items are often missing from initial summary quotes.
• In most UK projects, scope changes after works start are where costs escalate fastest.

Should You Do This Renovation?

• Usually worth it when kitchen extension solves a clear usability, compliance, or energy-performance problem.
• Less worth it when the main issue is cosmetic and resale timing is short-term.
• ROI is strongest when scope is disciplined and specification matches local value levels.

Common Cost Mistakes

• Underestimating labour and preliminaries while focusing only on material prices.
• Changing scope mid-project without budget re-baselining.
• Choosing the cheapest quote without checking detailed inclusions and exclusions.
• Running too little contingency for hidden defects and compliance upgrades.

Key Cost Factors

• Extension size — larger footprint costs more in build; kitchen fit-out scales with size and spec.
• Build spec — standard vs high-spec finishes, glazing, and roofing.
• Kitchen specification — flat-pack to bespoke; worktops and appliances are a big variable.
• Bifolds and glazing — large openings add significant cost.
• Services — moving or adding plumbing, gas, and electrics.
• Location — London and the South East typically cost 20–40% more.

Cost Checkpoints

Use these checkpoints to sequence spend decisions, protect your core scope, and reduce late-stage budget overruns.

• Prioritise full kitchen extension (build + premium kitchen) first: typical range £66k to £144k can shift the whole project budget if scope changes late.
• Prioritise full kitchen extension (build + mid kitchen) next: typical range £42k to £78k can shift the whole project budget if scope changes late.
• Use £65k as a working midpoint and hold a contingency of roughly 10% to 15% for unknowns and making-good works.
• Request like-for-like quotes with labour, materials, and exclusions split out so you can compare options without hidden scope gaps.

Typical Timeline

Costs in your area

Compare regional benchmarks for kitchen extension using the same UK baseline assumptions.

Ways to Reduce Costs

• Keep the extension footprint simple to reduce build cost.
• Separate build cost from kitchen fit-out in quotes so you can compare and phase.
• Use permitted development where possible to avoid full planning application.
• Source kitchen units and appliances separately if you're confident specifying.

Frequently Asked Questions

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