Range from the cheapest, mostly independent, £31 per hour and £224 per day (BOWIE CONSTRUCTION LTD based in CB21) to the dearest, normally the best, £36 per hour and £242 per day (Fenlake Construction based in CB23).
Comparing hourly and daily rates of extension builders 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.
" Hi I was hoping to get a quote for the renovation of an entire house. It’s about 60 years old. I would need: 1. potential plastering of walls, r 2. removal of an existing kitchen & fitting of new 3. Removal of 1 bathroom & fitting of 2 4...."
RODRIGUEZ, CB2
" Dear Builders, I am looking to undertake a hip to gable roof conversion, increase roof height and convert the space into two bedrooms and a bathroom. It is a detached house, located at: 20 Seymour Street Cambridge CB1 3DQ Can I..."
YASSAR, CB1
"Side return roughly 20 m2 on terraced Victorian house - access through rear of property and then round the back. "
LEIGH, SG12
We need extension builders like you to help local homeowners with their jobs.
| Job details | Estimate |
| Underpinning a house | £1672 |
| Build a two storey extension | £5572 |
| Build a timber frame extension | £5572 |
| Install a swimming pool | £3343 |
| Cost to build a single storey extension | £44576 |
| Cost to build a side return extension | £51263 |
| Install an RSJ | £975 |
| Build an outbuilding | £2229 |
| Build a mansard loft conversion | £11144 |
| Cost of a loft conversion | £31204 |
| Build a kitchen extension | £11144 |
| Build a hip to gable loft conversion | £8358 |
| Build a granny annexe | £5572 |
| Build a garden office | £2229 |
| Convert a garage | £1114 |
| Build a new garage | £2229 |
| Build a flat roof extension | £1894 |
| Build a dormer loft conversion | £2229 |
| Lay a concrete foundation | £2229 |
| Convert a bungalow loft | £3343 |
| Basement conversion cost | £31204 |