Cheapest builders to build a side return extension in SL3
Range from the cheapest Side return extension £28500 (Jeet & jarmal based in SL1) to the dearest Side return extension £37140 (GDC Design & Build based in TW19).
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 SL3.
Estimates for common extension builder jobs in SL3;
| Job | Estimate |
| Underpinning a house | £17331 |
| Build a two storey extension | £87747 |
| Build a timber frame extension | £25831 |
| Install a swimming pool | £80831 |
| Cost to build a single storey extension | £46621 |
| Cost to build a side return extension | £35599 |
| Install an RSJ | £2031 |
| Build an outbuilding | £9831 |
| Build a mansard loft conversion | £51831 |
| Cost of a loft conversion | £32166 |
| Build a kitchen extension | £41831 |
| Build a hip to gable loft conversion | £41831 |
| Build a granny annexe | £86831 |
| Build a garden office | £9831 |
| Convert a garage | £15831 |
| Build a flat roof extension | £21831 |
| Build a dormer loft conversion | £41831 |
| Lay a concrete foundation | £6081 |
| Convert a bungalow loft | £28831 |
| Basement conversion cost | £35599 |