Kitchen Extension in London
Kitchen Extension cost in London — is your quote fair?
The average kitchen extension cost in London is £52,500, with most jobs falling between £25,000 and £100,000. London prices are 25% above the UK national average. Upload your quote to check every line item against real London market data.
Average cost
£52,500
Typical range
£25,000 – £100,000
vs UK average
+25%
What affects kitchen extension costs in London
- →Size in square metres
- →Bifold or sliding door specification
- →Roof type (flat, pitched, lantern)
- →Underfloor heating
- →Kitchen fit-out included or separate
Frequently asked questions
How much does a kitchen extension cost in the UK?
A kitchen extension typically costs between £20,000 and £80,000 depending on size and specification. A standard 4x4m rear extension with bifold doors averages around £40,000 to £55,000.
What should a kitchen extension quote include?
Groundworks and foundations, structural walls, roof, windows and doors, electrical and plumbing first fix, plastering, and making good. Scaffolding, building regulations, and waste removal should also be itemised.
How do I compare kitchen extension quotes?
Paste each quote into Quotive individually or use the multi-quote comparison. We identify which builder has included the most complete scope, not just who is cheapest.