Kitchen Extension Cost in Cambridge: 2026 Price Guide
30 Jul 2026
Cambridge's growth from a medieval market town into one of the world's leading university cities, and more recently into the "Silicon Fen" biotech and technology cluster, has pushed property values here well above the national average - among the highest of any English city outside London - which shows up directly in what homeowners are willing to spend extending rather than moving.
| Extension size | Typical cost | Notes |
|---|---|---|
| Small (up to 15m²) | £23,000-£39,000 | Common on Victorian terraces near the centre |
| Medium (15-25m²) | £39,000-£61,000 | Typical rear extension |
| Large (25m²+) | £61,000+ | More common in outer suburbs |
Why Cambridge costs run high
Two factors push Cambridge extension costs above most comparable English cities. First, demand from a well-paid tech, biotech and academic workforce means builders' books fill up further in advance, and quotes reflect that demand. Second, much of the city sits on flat, low-lying fenland ground, and some properties - particularly toward the city's edges - need specific ground investigation before an extension is signed off, an extra cost that doesn't apply on more typical clay or chalk ground.
Cambridge's historic core, including the colleges and the streets immediately around them, carries extensive conservation area status, and a genuinely high number of properties near the centre are listed given the concentration of historic buildings in a small area.
What's actually driving the price
- Demand. A well-paid, growing workforce means builders can be booked out months in advance, and pricing reflects that.
- Ground conditions. Fenland ground on the city's outskirts occasionally needs specific foundation engineering that flatter, firmer ground elsewhere wouldn't require.
- Heritage. Properties near the historic centre commonly carry conservation area or listed status, adding Listed Building Consent to the process where relevant.
Frequently asked
Do I need planning permission for a rear extension in Cambridge? Often not for properties outside the historic centre, but conservation area and listed status - both common near the colleges - regularly require full planning permission. Check with Cambridge City Council's planning portal early.
How long does a typical Cambridge kitchen extension take? Around 10-14 weeks for a medium single-storey extension, longer given how far in advance popular local builders are typically booked.
Ready to get quotes? Post your job on builderfinder.uk and hear from vetted, reviewed builders who cover Cambridge - it's free, and your details stay private until you accept one.
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