Cheapest builders to build a side return extension in W1S
Range from the cheapest Side return extension £35700 (We Love Build - Three Arches based in W1J) to the dearest Side return extension £36870 (Elv8 Interiors based in W1B).
Comparing extension builders estimates for Side return extension 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 for a side return extention by posting your job to extension builders in W1S.
Estimates for common extension builder jobs in W1S;
| Job | Estimate |
| Underpinning a house | £17408 |
| Build a two storey extension | £87863 |
| Build a timber frame extension | £25908 |
| Install a swimming pool | £80908 |
| Cost to build a single storey extension | £48170 |
| Cost to build a side return extension | £36470 |
| Install an RSJ | £2108 |
| Build an outbuilding | £9908 |
| Build a mansard loft conversion | £51908 |
| Cost of a loft conversion | £32892 |
| Build a kitchen extension | £41908 |
| Build a hip to gable loft conversion | £41908 |
| Build a granny annexe | £86908 |
| Build a garden office | £9908 |
| Convert a garage | £15908 |
| Build a new garage | £18408 |
| Build a flat roof extension | £21908 |
| Build a dormer loft conversion | £41908 |
| Lay a concrete foundation | £6158 |
| Convert a bungalow loft | £28908 |
| Basement conversion cost | £36470 |