Kitchen Extension Cost UK 2026

A kitchen extension combines a single-storey rear or side-return with a complete new kitchen — typically the most popular and value-adding renovation in 2026. Total spend including the kitchen: £45,000–£110,000.

Quick answer

Typical UK price range: £45,000–£130,000. Typical time: 12–18 weeks.

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Extension type Single-storey rear Double-storey Side return Wrap-around Kitchen extension Oak frame

Extension floor area (m²)

Region London South East South West Midlands North of England Scotland Wales Northern Ireland

Specification level Basic / standard Mid-range Premium / high-end

Extras

Bi-fold doors £2,500–£6,000 Roof lanterns £1,500–£3,500 Underfloor heating £2,500–£5,000 New kitchen fit £8,000–£25,000 Architect & plans £2,500–£5,000

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Estimate only. Prices reflect 2026 UK market data — get quotes from local tradespeople for accurate pricing.

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Budget Under £5,000 £5,000 – £15,000 £15,000 – £30,000 £30,000 – £60,000 £60,000+ Not sure

Timeline As soon as possible 1 – 3 months 3 – 6 months 6+ months Just researching

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Key points

• Combines extension shell with full kitchen
• Typical kitchens in extensions cost £10,000–£35,000
• Bi-folds + roof lantern usually specified
• Adds 8–15 % to property value

Cost breakdown

Item	Low	High
Extension shell (single-storey)	£35,000	£65,000
New kitchen (units + appliances)	£10,000	£35,000
Kitchen fitting + electrics	£3,500	£8,000
Bi-folds + lantern	£6,000	£14,000
Flooring + decorating	£2,500	£6,000

Cost by UK region

Region	Typical cost
London	£118,125
South East	£109,375
South West	£96,250
Midlands	£87,500
North England	£78,750
Scotland	£83,125
Wales	£78,750

How to save money

• Choose the kitchen design BEFORE the extension shape is finalised
• Order kitchen units to be delivered just before the shell is dry
• Specify quartz worktops — best value premium upgrade

How to find a trusted tradesperson

Get at least 3 quotes from vetted UK trade networks:

• Checkatrade
• MyBuilder
• Bark

FAQs

How long does a kitchen extension take?

12–18 weeks for the build + kitchen fitting. Allow 8–16 weeks beforehand for planning and design.

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Disclaimer: Prices are guide ranges based on 2026 UK market data. Get quotes from local tradespeople for accurate pricing.