From £87,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Sanderstead. No obligation free...
From £87,424
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,312
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in Sanderstead. Please contact us for a free, no...
From £87,392
Need an Extension Builder in Sanderstead? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for ...
From £86,920
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £87,432
Krystian Wojasiewicz is a trusted extension builder serving customers in Sanderstead and the surrounding area. Contact us to today to get a competi...
From £87,432
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £87,144
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in Sanderstead. No obligation f...
From £87,304
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
From £86,904
V.S.P is a trusted extension builder serving customers in Sanderstead and the surrounding area. Contact us to today to get a competitive quote for ...

Building a granny annexe ranges from £86,904 (V.S.P based in NW10) to £87,432 (Krystian Wojasiewicz based in HA9), 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 Sanderstead by posting a job with HaMuch. We will send it to extension builders in Sanderstead who will be happy to help you.
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 - £17,731

Two storey extension - £88,347

Build a timber frame extension - £26,231

Build a swimming pool - £81,231

Single storey extension - £59,624

Side return extension - £44,101

Install an RSJ - £2,431

Outbuilding - £10,231

Build a Mansard loft conversion - £52,231

Loft conversion - £35,918

Build a kitchen extension - £42,231

Hip to gable loft conversion - £42,231

Granny annexe - £87,231

Garden office - £10,231

Convert a Garage - £16,231

Garage - £18,731

Build a flat roof extension - £22,231

Build a dormer loft conversion - £42,231

Concrete foundations - £6,481

Convert a bungalow loft - £29,231

Convert a basement - £40,101