Kettering Mobile Sandblasting are here to help customers who need an Extension Builder in NN15. We offer a competitive rate to complete all your ex...
I Plowright Brickwork is an established extension buildering business in NN15. We come highly recommended and provide competitive quotes for your w...
Relax... you have found a reliable extension builder in NN15. Jogga Construction is a friendly and reliable company based in NN15 who consider no j...
Experienced extension builder ready to quote for your work. GARY TAYLOR BUILDERS LTD is the best extension builder in NN15. No obligation free quot...

Building a granny annexe ranges from £86,760 (GARY TAYLOR BUILDERS LTD based in NN15) to £87,056 (Kettering Mobile Sandblasting based in NN16), 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 NN15 by posting a job with HaMuch. We will send it to extension builders in NN15 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Kettering | £34 | £237 |
| Granny Annexe near Wellingborough | £39 | £251 |
| Granny Annexe near Rushden | £34 | £231 |
| Granny Annexe near Corby | £30 | £214 |
| Granny Annexe near Market Harborough | £31 | £217 |
| Granny Annexe near Northampton | £35 | £239 |
| Granny Annexe near Huntingdonshire | £36 | £290 |
| Granny Annexe near South Bedfordshire | £45 | £278 |
| Granny Annexe near Bedford | £45 | £278 |
| Granny Annexe near Kempston | £44 | £273 |
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Underpin a building - £17,414

Two storey extension - £87,871

Build a timber frame extension - £25,914

Build a swimming pool - £80,914

Single storey extension - £53,280

Side return extension - £40,533

Install an RSJ - £2,114

Outbuilding - £9,914

Build a Mansard loft conversion - £51,914

Loft conversion - £32,944

Build a kitchen extension - £41,914

Hip to gable loft conversion - £41,914

Granny annexe - £86,914

Garden office - £9,914

Convert a Garage - £15,914

Garage - £18,414

Build a flat roof extension - £21,914

Build a dormer loft conversion - £41,914

Concrete foundations - £6,164

Convert a bungalow loft - £28,914

Convert a basement - £36,533