Cost guide
How much does a Home extension cost?
Thinking about a home extension or some renovation work? You are in the right place. CertifySpace helps you compare free quotes from trusted UK firms. Understanding the potential costs upfront can make planning much easier. We will give you a clear idea of what to expect. From a small repair to a significant extension, prices can vary. Generally, you will find costs for home extension and general building work in the UK typically range from around £1,000 up to £50,000. This guide breaks down what influences these figures and helps you budget wisely.
Typical price
£1,000 to £50,000
What changes the price
Project Size
Larger extensions or extensive renovations naturally cost more due to materials and labour.
Materials Used
High quality or specialist finishes will increase your overall budget compared to standard options.
Design Complexity
Intricate designs or unusual structures require more detailed planning and skilled craftsmanship.
Site Access
Difficult access for machinery or deliveries can add to labour time and overall project costs.
Ground Conditions
Challenging ground like rocky soil or poor drainage might need extra foundation work.
Internal Finishes
The choice of flooring, paint, fittings, and kitchen or bathroom installations significantly impacts the final price.
Prices by region
| Region | Low | Typical | High |
|---|---|---|---|
| London | £4,000 | £35,000 | £50,000 |
| South East | £3,000 | £30,000 | £45,000 |
| South West | £2,500 | £25,000 | £40,000 |
| East of England | £2,500 | £25,000 | £40,000 |
| Midlands | £2,000 | £20,000 | £35,000 |
| North West | £1,500 | £18,000 | £30,000 |
| North East and Yorkshire | £1,000 | £15,000 | £28,000 |
| Scotland and Wales | £1,000 | £16,000 | £29,000 |
Questions people ask
How can I get an accurate quote?
The best way is to have detailed plans and a clear scope of work ready. Share as much information as possible with the firms. CertifySpace helps you gather multiple tailored quotes.
Do these costs include VAT?
Most quotes from building firms will include VAT, but always double check. It is important to confirm this detail with each firm you speak to.
What is usually included in an extension cost?
Typically, the cost covers materials, labour, project management, and basic finishes. Specialist items like a new kitchen or bespoke joinery are often priced separately.
Should I budget for anything extra?
Yes, always set aside a contingency fund, usually 10-15% of your total budget. This covers any unexpected issues or changes you might want during the build.
How long do extensions usually take?
This varies greatly with size and complexity. A small extension might take 8-12 weeks, while larger projects can be 4-6 months or longer. Your builder can give a more precise timeline.
Why do prices vary so much by region?
Regional differences in labour costs, material transport, and local demand all play a part. Major cities, particularly London, often have higher prices than other areas.