Granny Annexe Cost in Chalfont St Giles
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 Chalfont St Giles?
Building a granny annexe ranges from £86840 (Swan Windows & Son Limited based in WD3) to £87240 (OLI HOME IMPROVEMENTS based in SL9), 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 Chalfont St Giles by posting a job with HaMuch. We will send it to extension builders in Chalfont St Giles who will be happy to help you.
Estimates for common extension builder jobs in Chalfont St Giles;
| Job | Estimate |
| Underpinning a house | £17425 |
| Build a two storey extension | £87888 |
| Build a timber frame extension | £25925 |
| Install a swimming pool | £80925 |
| Cost to build a single storey extension | £48509 |
| Cost to build a side return extension | £36661 |
| Install an RSJ | £2125 |
| Build an outbuilding | £9925 |
| Build a mansard loft conversion | £51925 |
| Cost of a loft conversion | £33051 |
| Build a kitchen extension | £41925 |
| Build a hip to gable loft conversion | £41925 |
| Build a granny annexe | £86925 |
| Build a garden office | £9925 |
| Convert a garage | £15925 |
| Build a new garage | £18425 |
| Build a flat roof extension | £21925 |
| Build a dormer loft conversion | £41925 |
| Lay a concrete foundation | £6175 |
| Convert a bungalow loft | £28925 |
| Basement conversion cost | £36661 |