Experienced extension builder ready to quote for your work. Keith Andrews Building is the best extension builder in Grays. No obligation free quote...
Joe
FLEX CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in Grays. We offer a competitive rate to complete all your exten...
The England Team is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your work....
C & B Multi-Trader is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your wor...
Relax... you have found a reliable extension builder in Grays. JPRMS Ltd is a friendly and reliable company based in Grays who consider no job as t...
Experienced extension builder ready to quote for your work. CIA Construction Limited is the best extension builder in Grays. No obligation free quo...
L A CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in Grays. We offer a competitive rate to complete all your extens...
Kaizer Berg Ltd is an established and experienced local extension builder in Grays. Please contact us for a free, no obligation quote and competiti...
Trusted and professional extension builder in Grays. Experienced in all extension buildering work and keeping within budget and on quote. PALMERS B...
From £86,992
Warren Miller Building is an established extension buildering business in Grays. We come highly recommended and provide competitive quotes for your...

Building a granny annexe ranges from £86,880 (CIA Construction Limited based in RM18) to £87,392 (The England Team 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 Grays by posting a job with HaMuch. We will send it to extension builders in Grays 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 - £17,638

Two storey extension - £88,206

Build a timber frame extension - £26,138

Build a swimming pool - £81,138

Single storey extension - £57,752

Side return extension - £43,048

Install an RSJ - £2,338

Outbuilding - £10,138

Build a Mansard loft conversion - £52,138

Loft conversion - £35,040

Build a kitchen extension - £42,138

Hip to gable loft conversion - £42,138

Granny annexe - £87,138

Garden office - £10,138

Convert a Garage - £16,138

Garage - £18,638

Build a flat roof extension - £22,138

Build a dormer loft conversion - £42,138

Concrete foundations - £6,388

Convert a bungalow loft - £29,138

Convert a basement - £39,048