Sean Smithers
Our building services company SDS Constructions has been established for many years and have been providing customers in Dagenham and the surroundi...
From £86,880
Erald Kanani
Member since August 2025
Barking, IG11
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in Barking. G HAMID CONSTRUCTION LTD is a friendly and reliable company based in Barking who c...
Relax... you have found a reliable extension builder in Barking. Sevcan Construction is a friendly and reliable company based in Barking who consid...
Need an Extension Builder in Barking? MONOLITH CONSTRUCTION LTD has been helping local clients (10 mile radius) with their extension buildering job...
Buildem Ltd is a trusted extension builder serving customers in Barking and the surrounding area. Contact us to today to get a competitive quote fo...
Decorating Building Service are here to help customers who need an Extension Builder in Barking. We offer a competitive rate to complete all your e...
M & S Builders is a trusted extension builder serving customers in Barking and the surrounding area. Contact us to today to get a competitive quote...
Relax... you have found a reliable extension builder in Barking. Derryard Construction Ltd is a friendly and reliable company based in Barking who ...
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in Barking. We offer a competitive rate to complete all your extension...

Building a granny annexe ranges from £86,880 (Can design and Construction based in Ig11) to £87,400 (Decorating Building Service based in IG3), 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 Barking by posting a job with HaMuch. We will send it to extension builders in Barking 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 - £17,640

Two storey extension - £88,210

Build a timber frame extension - £26,140

Build a swimming pool - £81,140

Single storey extension - £57,800

Side return extension - £43,075

Install an RSJ - £2,340

Outbuilding - £10,140

Build a Mansard loft conversion - £52,140

Loft conversion - £35,063

Build a kitchen extension - £42,140

Hip to gable loft conversion - £42,140

Granny annexe - £87,140

Garden office - £10,140

Convert a Garage - £16,140

Garage - £18,640

Build a flat roof extension - £22,140

Build a dormer loft conversion - £42,140

Concrete foundations - £6,390

Convert a bungalow loft - £29,140

Convert a basement - £39,075