From £16,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Westerham. No obligation free q...
1 review
From £16,192
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
From £16,152
I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...
From £17,024
Buci builders ltd is a trusted extension builder serving customers in Westerham and the surrounding area. Contact us to today to get a competitive ...
From £16,312
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in Westerham. Please contact us for a free, no o...
From £16,192
Gb construction are here to help customers who need an Extension Builder in Westerham. We offer a competitive rate to complete all your extension ...
From £17,200
Member since August 2025
Banga decoration. Is Base in south London for number of year Banga decoration is a small company. Wich provide an excellent job to the custom...
From £16,184
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Westerham. No obligation free quotes...
From £16,184
Relax... you have found a reliable extension builder in Westerham. First guard Roofing is a friendly and reliable company based in Westerham who co...
From £16,616
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Westerham and the surrounding area. Contact us to today to get ...

Garage conversions in Westerham typically range from £16,048 (J&J Building Solutions based in SW16) to £17,200 (Banga Decoration based in CR7), but the only way to get an accurate cost for your specific project is to get quotes.
Post a job with HaMuch and we'll send it to extension builders in Westerham who will be happy to help.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Convert A Garage near Caterham | £43 | £272 |
| Convert A Garage near Sevenoaks | £38 | £234 |
| Convert A Garage near Croydon | £43 | £267 |
| Convert A Garage near Bromley | £42 | £265 |
| Convert A Garage near Redhill | £41 | £269 |
| Convert A Garage near Bexley | £42 | £265 |
| Convert A Garage near Reigate & Banstead | £41 | £271 |
| Convert A Garage near Sutton | £43 | £273 |
| Convert A Garage near Lewisham | £43 | £268 |
| Convert A Garage near Reigate | £40 | £270 |
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 - £17,910

Two storey extension - £88,616

Build a timber frame extension - £26,410

Build a swimming pool - £81,410

Single storey extension - £63,208

Side return extension - £46,117

Install an RSJ - £2,610

Outbuilding - £10,410

Build a Mansard loft conversion - £52,410

Loft conversion - £37,598

Build a kitchen extension - £42,410

Hip to gable loft conversion - £42,410

Granny annexe - £87,410

Garden office - £10,410

Convert a Garage - £16,410

Garage - £18,910

Build a flat roof extension - £22,410

Build a dormer loft conversion - £42,410

Concrete foundations - £6,660

Convert a bungalow loft - £29,410

Convert a basement - £42,117