Richard Thomas
Need an Extension Builder in Swanage? RNTP ltd has been helping local clients (20 mile radius) with their extension buildering jobs for many years....
Urban Projects are here to help customers who need an Extension Builder in Swanage. We offer a competitive rate to complete all your extension buil...
George DIXON
MARLEY TRained roofer, reliable ,flat roofs , slating and tiling,fascias and gutters. All repairs, no job too small
From £87,064
Need an Extension Builder in Swanage? D&B Build has been helping local clients (20 mile radius) with their extension buildering jobs for many years...
From £87,120
Ground Up Building Services Ltd is a trusted extension builder serving customers in Swanage and the surrounding area. Contact us to today to get a ...
From £87,008
DJ HALE BUILDING CONTRACTORS is a trusted extension builder serving customers in Swanage and the surrounding area. Contact us to today to get a com...
From £86,784
Swanage, BH19
SWANAGE BUILDING SERVICES is a trusted extension builder serving customers in Swanage and the surrounding area. Contact us to today to get a compet...
From £87,288
Experienced extension builder ready to quote for your work. Portus Homes is the best extension builder in Swanage. No obligation free quotes and ma...

Building a granny annexe ranges from £86,200 (GMD Roofing based in BH15) to £87,584 (RNTP ltd based in BH14), 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 Swanage by posting a job with HaMuch. We will send it to extension builders in Swanage who will be happy to help you.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Granny Annexe near Poole | £38 | £250 |
| Granny Annexe near Bournemouth | £38 | £257 |
| Granny Annexe near Christchurch | £36 | £251 |
| Granny Annexe near Dorchester | £30 | £230 |
| Granny Annexe near Weymouth | £33 | £260 |
| Granny Annexe near New Forest | £32 | £245 |
| Granny Annexe near Totton | £34 | £243 |
| Granny Annexe near Isle of Wight | £34 | £246 |
| Granny Annexe near Southampton | £34 | £243 |
| Granny Annexe near Romsey | £32 | £230 |
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 - £17,483

Two storey extension - £87,975

Build a timber frame extension - £25,983

Build a swimming pool - £80,983

Single storey extension - £54,660

Side return extension - £41,309

Install an RSJ - £2,183

Outbuilding - £9,983

Build a Mansard loft conversion - £51,983

Loft conversion - £33,591

Build a kitchen extension - £41,983

Hip to gable loft conversion - £41,983

Granny annexe - £86,983

Garden office - £9,983

Convert a Garage - £15,983

Garage - £18,483

Build a flat roof extension - £21,983

Build a dormer loft conversion - £41,983

Concrete foundations - £6,233

Convert a bungalow loft - £28,983

Convert a basement - £37,309