Extension builder estimates (based on hourly rates) to build a single storey extension in Borehamwood
Range from the cheapest single storey extension £46960 (Ardent Home Improvements Ltd based in WD6) to the dearest single storey extension £66000 (CLJ Building Ltd based in HA7).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in Borehamwood by posting a job with HaMuch and we will send it to extension builders in Borehamwood.
Estimates for common extension builder jobs in Borehamwood;
| Job | Estimate |
| Underpinning a house | £17429 |
| Build a two storey extension | £87894 |
| Build a timber frame extension | £25929 |
| Install a swimming pool | £80929 |
| Cost to build a single storey extension | £48586 |
| Cost to build a side return extension | £36704 |
| Install an RSJ | £2129 |
| Build an outbuilding | £9929 |
| Build a mansard loft conversion | £51929 |
| Cost of a loft conversion | £33087 |
| Build a kitchen extension | £41929 |
| Build a hip to gable loft conversion | £41929 |
| Build a granny annexe | £86929 |
| Build a garden office | £9929 |
| Convert a garage | £15929 |
| Build a new garage | £18429 |
| Build a flat roof extension | £21929 |
| Build a dormer loft conversion | £41929 |
| Lay a concrete foundation | £6179 |
| Convert a bungalow loft | £28929 |
| Basement conversion cost | £36704 |