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...

Costs range from £87,640 (GARY TAYLOR BUILDERS LTD based in NN15) to £88,084 (Kettering Mobile Sandblasting based in NN16), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
Post your job on HaMuch and we'll send it to extension builders to NN15.
"Two storey extension" - NN9, job posted 10/05/25
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Kettering | £34 | £237 |
| Two Storey Extension near Wellingborough | £39 | £251 |
| Two Storey Extension near Rushden | £34 | £231 |
| Two Storey Extension near Corby | £30 | £214 |
| Two Storey Extension near Market Harborough | £31 | £217 |
| Two Storey Extension near Northampton | £35 | £239 |
| Two Storey Extension near Huntingdonshire | £36 | £290 |
| Two Storey Extension near South Bedfordshire | £45 | £278 |
| Two Storey Extension near Bedford | £45 | £278 |
| Two Storey Extension 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