From £86,880
Tilbury, RM18
Experienced extension builder ready to quote for your work. CIA Construction Limited is the best extension builder in RM18. No obligation free quot...
From £87,096
Experienced extension builder ready to quote for your work. Deen Construction & Renovations Ltd is the best extension builder in RM18. No obligatio...
From £86,968
Essex, RM18
At Deen Construction & Renovations Ltd, we offer a one stop solution for a range of property Constructions & Renovation projects, Maintenance, Full...
From £87,376
C & B Multi-Trader is an established extension buildering business in RM18. We come highly recommended and provide competitive quotes for your work...
From £87,096
Beautiful Kitchens is a family-run company, owned and directed by husband and wife Debbie and Nigel Powell along with their daughter, Bethany, and ...
From £86,968
Kaizer Berg Ltd is an established and experienced local extension builder in RM18. Please contact us for a free, no obligation quote and competitiv...
From £87,184
Need to find an Extension Builder near you for all your extension buildering work?
GDL CONSTRUCTION provides a local, trusted extension bui...
From £87,104
Bungar & Co ltd is a trusted extension builder serving customers in RM18 and the surrounding area. Contact us to today to get a competitive quote f...
From £86,864
Trusted and professional extension builder in RM18. Experienced in all extension buildering work and keeping within budget and on quote. Access Bui...
From £87,328
Trusted and professional extension builder in RM18. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS BU...

Building a granny annexe ranges from £86,864 (Access Builders Direct LTD based in RM17) to £87,376 (C & B Multi-Trader based in RM16), 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 RM18 by posting a job with HaMuch. We will send it to extension builders in RM18 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 - £17,586

Two storey extension - £88,130

Build a timber frame extension - £26,086

Build a swimming pool - £81,086

Single storey extension - £56,728

Side return extension - £42,472

Install an RSJ - £2,286

Outbuilding - £10,086

Build a Mansard loft conversion - £52,086

Loft conversion - £34,560

Build a kitchen extension - £42,086

Hip to gable loft conversion - £42,086

Granny annexe - £87,086

Garden office - £10,086

Convert a Garage - £16,086

Garage - £18,586

Build a flat roof extension - £22,086

Build a dormer loft conversion - £42,086

Concrete foundations - £6,336

Convert a bungalow loft - £29,086

Convert a basement - £38,472