From £87,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Petts Wood. No obligation free ...
From £87,192
Gb construction are here to help customers who need an Extension Builder in Petts Wood. We offer a competitive rate to complete all your extension...
From £87,184
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in Petts Wood. No obligation free quote...
From £87,096
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Petts Wood. No obligation free quotes and many happ...
From £86,984
JK Doors is a trusted extension builder serving customers in Petts Wood and the surrounding area. Contact us to today to get a competitive quote fo...
From £87,192
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £87,392
Need an Extension Builder in Petts Wood? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for m...
From £87,312
skilled worker who specializes in completing a wide range of building and renovation projects
From £87,616
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Petts Wood and the surrounding area. Contact us to today to get...
From £87,200
Relax... you have found a reliable extension builder in Petts Wood. Derryard Construction Ltd is a friendly and reliable company based in Petts Woo...

Building a granny annexe ranges from £86,984 (JK Doors based in W1W) to £87,616 (HOUSE BUILDING SERVICES LIMITED based in DA16), 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 Petts Wood by posting a job with HaMuch. We will send it to extension builders in Petts Wood who will be happy to help you.
| Borough in London |
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| Granny Annexe in Petts Wood |
| Granny Annexe in Orpington |
| Granny Annexe in Chislehurst |
| Granny Annexe in Sidcup |
| Granny Annexe in Swanley |
| Granny Annexe in Bexley |
| Granny Annexe in Keston |
| Granny Annexe in Bromley |
| Granny Annexe in Bexley |
| Granny Annexe in Eltham |
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 - £17,722

Two storey extension - £88,332

Build a timber frame extension - £26,222

Build a swimming pool - £81,222

Single storey extension - £59,432

Side return extension - £43,993

Install an RSJ - £2,422

Outbuilding - £10,222

Build a Mansard loft conversion - £52,222

Loft conversion - £35,828

Build a kitchen extension - £42,222

Hip to gable loft conversion - £42,222

Granny annexe - £87,222

Garden office - £10,222

Convert a Garage - £16,222

Garage - £18,722

Build a flat roof extension - £22,222

Build a dormer loft conversion - £42,222

Concrete foundations - £6,472

Convert a bungalow loft - £29,222

Convert a basement - £39,993