Range from the cheapest £22.5 per hour and £100 per day (Weathersealed UK based in DL1) to the dearest £100 per hour and £220 per day (J.collinson based in DL13).
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.
See table for all Extension Builder rates in DL11
| Job details | Estimate |
| Underpinning a house | £1393 |
| Build a two storey extension | £4642 |
| Build a timber frame extension | £4642 |
| Install a swimming pool | £2785 |
| Cost to build a single storey extension | £37133 |
| Cost to build a side return extension | £42703 |
| Install an RSJ | £812 |
| Build an outbuilding | £1857 |
| Build a mansard loft conversion | £9283 |
| Cost of a loft conversion | £25993 |
| Build a kitchen extension | £9283 |
| Build a hip to gable loft conversion | £6963 |
| Build a granny annexe | £4642 |
| Build a garden office | £1857 |
| Convert a garage | £928 |
| Build a new garage | £1857 |
| Build a flat roof extension | £1578 |
| Build a dormer loft conversion | £1857 |
| Lay a concrete foundation | £1857 |
| Convert a bungalow loft | £2785 |
| Basement conversion cost | £25993 |
| Business name | Hourly Rate | Daily Rate |
|---|---|---|
| GURKHA CONSTRUCTION SVCS LTD, , DL10 | £41 | £193 |
| Lee Construction (LDG) Ltd, , DL10 | £39 | £192 |
| J.collinson, County Durham, DL13 | £40 | £220 |
| Weathersealed UK, Darlington, DL1 | £100 | £100 |
| Darlington Building Services, Darlington, DL1 | £25 | £175 |
| pidesigns, County Durham, DL1 | £39 | £216 |
| Northern Roofline Solutions, Bishop Auckland, DL14 | £35 | £203 |
| Turners Roofing Services, 46 Seymour Street, Bishop Auckland, Bish, DL14 | £36 | £200 |
| ANWEN CONSTRUCTION, , DL5 | £37 | £201 |
| Under Pressure, County Durham, DL2 | £39 | £214 |
| C J Roofing, Belvedere House, Kingsway, Bishop Auckla, DL14 | £36 | £215 |
| D. Simpson Roof Rite Services, Toronto, Bishop Auck, DL14 | £36 | £205 |
| S & K Windows, Standard Way Industrial Estate, 9 Barker, DL6 | £38 | £190 |
| D H Evans, Bedale , DL8 | £25 | £180 |
| Darren Collin Joinery, Northallerton , DL7 | £22.5 | £180 |
| SBC (BUILDERS) LIMITED, , DL15 | £34 | £207 |