From £86,880
Member since June 2026
We Fix We Build Kent is a premier, full-service high-end maintenance and building company. We streamline your project by providing all trades under...
From £87,328
JLS Contstruction is an established and experienced local extension builder in ME15. Please contact us for a free, no obligation quote and competit...
From £86,936
Experienced extension builder ready to quote for your work. Direct Build Ltd is the best extension builder in ME15. No obligation free quotes and m...
From £87,224
Relax... you have found a reliable extension builder in ME15. Timberlogbuild LTD is a friendly and reliable company based in ME15 who consider no j...
From £86,728
Experienced extension builder ready to quote for your work. Lande Solutions Ltd is the best extension builder in ME15. No obligation free quotes an...
From £86,920
Alpha Projects Ltd are here to help customers who need an Extension Builder in ME15. We offer a competitive rate to complete all your extension bui...
From £87,088
Need an Extension Builder in ME15? Terlecki Ltd has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
From £87,080
We thrive on a challenge, and really enjoy working with our client's to provide a high quality finished product within the budget required. Whether...
From £86,968
JOHN KNOWLES BUILDING SERVICES are here to help customers who need an Extension Builder in ME15. We offer a competitive rate to complete all your e...

Building a granny annexe ranges from £86,368 (Rafs based in ME15) to £87,328 (JLS Contstruction based in ME15), 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 ME15 by posting a job with HaMuch. We will send it to extension builders in ME15 who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Maidstone | £36 | £226 |
| Granny Annexe near Larkfield | £36 | £224 |
| Granny Annexe near Rochester | £34 | £220 |
| Granny Annexe near Gillingham | £34 | £219 |
| Granny Annexe near Chatham | £34 | £220 |
| Granny Annexe near Sittingbourne | £31 | £217 |
| Granny Annexe near Tonbridge | £33 | £226 |
| Granny Annexe near Swale | £31 | £214 |
| Granny Annexe near Gravesend | £35 | £227 |
| Granny Annexe near Tunbridge Wells | £33 | £228 |
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 - £17,452

Two storey extension - £87,928

Build a timber frame extension - £25,952

Build a swimming pool - £80,952

Single storey extension - £54,040

Side return extension - £40,960

Install an RSJ - £2,152

Outbuilding - £9,952

Build a Mansard loft conversion - £51,952

Loft conversion - £33,300

Build a kitchen extension - £41,952

Hip to gable loft conversion - £41,952

Granny annexe - £86,952

Garden office - £9,952

Convert a Garage - £15,952

Garage - £18,452

Build a flat roof extension - £21,952

Build a dormer loft conversion - £41,952

Concrete foundations - £6,202

Convert a bungalow loft - £28,952

Convert a basement - £36,960