Range from the cheapest, mostly independent, £15 per hour and £120 per day (MKS Builders Ltd based in OL11) to the dearest, normally the best, £29 per hour and £207 per day (AJD Developments based in M24).
Comparing hourly and daily rates of Extension Builder's 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 - Click 'Get quotes' and describe your job and we will send it to your local extension builders for FREE.
A complete house renovation to a very small terraced house
Brick block flag paving reparing garden wall works and full shuttring carpenter
Remove brick wall to extend the size of kitchen, remove old units and fit new kitchen .
We need Extension Builders like you to help local homeowners with their jobs.
| Job details | Estimate |
| Underpinning a house | £1393 |
| Build a two storey extension | £4643 |
| Build a timber frame extension | £4643 |
| Install a swimming pool | £2786 |
| Cost to build a single storey extension | £37148 |
| Cost to build a side return extension | £42720 |
| Install an RSJ | £813 |
| Build an outbuilding | £1857 |
| Build a mansard loft conversion | £9287 |
| Cost of a loft conversion | £26004 |
| Build a kitchen extension | £9287 |
| Build a hip to gable loft conversion | £6965 |
| Build a granny annexe | £4643 |
| Build a garden office | £1857 |
| Convert a garage | £929 |
| Build a new garage | £1857 |
| Build a flat roof extension | £1579 |
| Build a dormer loft conversion | £1857 |
| Lay a concrete foundation | £1857 |
| Convert a bungalow loft | £2786 |
| Basement conversion cost | £26004 |