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Select your affordable EC3R extension builder
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
CK Constructions & Development Ltd is a trusted extension builder serving customers in EC3R and the surrounding area. Contact us to today to get a ...
GS Fabric Ltd is an established and experienced local extension builder in EC3R. Please contact us for a free, no obligation quote and competitive ...
JM Building Services is a trusted extension builder serving customers in EC3R and the surrounding area. Contact us to today to get a competitive qu...
Buildwiser is a trusted extension builder serving customers in EC3R and the surrounding area. Contact us to today to get a competitive quote for ex...
At Home Tranformers Ltd we have been fitting bespoke bathrooms for over 10 years. We pride ourselves on being the go-to bathroom fitters for discer...
Need to find an Extension Builder near you for all your extension buildering work?
Ask Building provides a local, trusted extension builder...
Daniel Dixon
Need to find an Extension Builder near you for all your extension buildering work?
Renobuild Group provides a local, trusted extension buil...
AAA Design Decorators are here to help customers who need an Extension Builder in EC3R. We offer a competitive rate to complete all your extension ...

Building a granny annexe ranges from £86,928 (GS Fabric Ltd based in E2) to £87,456 (Ask Building based in SE1), 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 EC3R by posting a job with HaMuch. We will send it to extension builders in EC3R 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 - £17,715

Two storey extension - £88,323

Build a timber frame extension - £26,215

Build a swimming pool - £81,215

Single storey extension - £59,304

Side return extension - £43,921

Install an RSJ - £2,415

Outbuilding - £10,215

Build a Mansard loft conversion - £52,215

Loft conversion - £35,768

Build a kitchen extension - £42,215

Hip to gable loft conversion - £42,215

Granny annexe - £87,215

Garden office - £10,215

Convert a Garage - £16,215

Garage - £18,715

Build a flat roof extension - £22,215

Build a dormer loft conversion - £42,215

Concrete foundations - £6,465

Convert a bungalow loft - £29,215

Convert a basement - £39,921