Granny Annexe Cost in Botany Bay
A granny annexe is the ideal solution for offering a young family member their own space in your home while they save up for their own house, or to help an older relative have some independence while keeping them at a safe distance. But how much do they cost to build in Botany Bay?
Building a granny annexe ranges from £86832 (Firtree Building Services Ltd based in EN1) to £87800 (Acme Lofts & Extensions based in EN2), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Botany Bay by posting a job with HaMuch. We will send it to extension builders in Botany Bay who will be happy to help you.
Estimates for common extension builder jobs in Botany Bay;
| Job | Estimate |
| Underpinning a house | £17438 |
| Build a two storey extension | £87907 |
| Build a timber frame extension | £25938 |
| Install a swimming pool | £80938 |
| Cost to build a single storey extension | £48765 |
| Cost to build a side return extension | £36805 |
| Install an RSJ | £2138 |
| Build an outbuilding | £9938 |
| Build a mansard loft conversion | £51938 |
| Cost of a loft conversion | £33171 |
| Build a kitchen extension | £41938 |
| Build a hip to gable loft conversion | £41938 |
| Build a granny annexe | £86938 |
| Build a garden office | £9938 |
| Convert a garage | £15938 |
| Build a new garage | £18438 |
| Build a flat roof extension | £21938 |
| Build a dormer loft conversion | £41938 |
| Lay a concrete foundation | £6188 |
| Convert a bungalow loft | £28938 |
| Basement conversion cost | £36805 |