From £87,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in Stamford Hill. No obligation fr...
From £87,200
Relax... you have found a reliable extension builder in Stamford Hill. Derryard Construction Ltd is a friendly and reliable company based in Stamfo...
From £86,968
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in Stamford Hill. We offer a competitive rate to complete all your ext...
From £87,032
Relax... you have found a reliable extension builder in Stamford Hill. Major Building Contractors Ltd is a friendly and reliable company based in S...
From £87,184
Need to find an Extension Builder near you for all your extension buildering work?
Sz Builders provides a local, trusted extension builderi...
From £87,712
Experienced extension builder ready to quote for your work. Render is the best extension builder in Stamford Hill. No obligation free quotes and ma...
From £86,896
Experienced extension builder ready to quote for your work. Jhon is the best extension builder in Stamford Hill. No obligation free quotes and many...
From £86,880
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £87,192
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £87,312
skilled worker who specializes in completing a wide range of building and renovation projects

Building a granny annexe ranges from £86,880 (Can design and Construction based in Ig11) to £87,712 (Render based in IG1), 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 Stamford Hill by posting a job with HaMuch. We will send it to extension builders in Stamford Hill 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 - £17,642

Two storey extension - £88,214

Build a timber frame extension - £26,142

Build a swimming pool - £81,142

Single storey extension - £57,848

Side return extension - £43,102

Install an RSJ - £2,342

Outbuilding - £10,142

Build a Mansard loft conversion - £52,142

Loft conversion - £35,085

Build a kitchen extension - £42,142

Hip to gable loft conversion - £42,142

Granny annexe - £87,142

Garden office - £10,142

Convert a Garage - £16,142

Garage - £18,642

Build a flat roof extension - £22,142

Build a dormer loft conversion - £42,142

Concrete foundations - £6,392

Convert a bungalow loft - £29,142

Convert a basement - £39,102