From £23,232
Optimus Build Solutions delivers exceptional construction services in London and surronding areas. Specializing in bathroom and kitchen refurbishme...
From £22,240
Romford Essex, RM1
Q Boss D&B is an established extension buildering business in Romford. We come highly recommended and provide competitive quotes for your work.
...From £21,952
SS Home Builders is a trusted extension builder serving customers in Romford and the surrounding area. Contact us to today to get a competitive quo...
From £22,384
Romford, RM1
Prendi Construction Ltd is an established and experienced local extension builder in Romford. Please contact us for a free, no obligation quote and...
From £22,144
J Mchayle & Sons are here to help customers who need an Extension Builder in Romford. We offer a competitive rate to complete all your extension bu...
From £22,360
Experienced extension builder ready to quote for your work. CPD Limited is the best extension builder in Romford. No obligation free quotes and man...
From £22,224
Relax... you have found a reliable extension builder in Romford. A Star Construction is a friendly and reliable company based in Romford who consid...
From £22,080
Trusted and professional extension builder in Romford. Experienced in all extension buildering work and keeping within budget and on quote. Emona h...
From £21,984
P & M Builders are here to help customers who need an Extension Builder in Romford. We offer a competitive rate to complete all your extension buil...
From £22,080
S A BUILDERS & CONTRACTORS LTD is a trusted extension builder serving customers in Romford and the surrounding area. Contact us to today to get a c...

A flat roof extension ranges from the cheapest of £21,952 (SS Home Builders based in RM1) to the dearest of £23,232 (Optimus Build Solutions based in Rm1), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Romford by posting a job with HaMuch. We'll send it to extension builders in Romford.
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 - £17,768

Two storey extension - £88,402

Build a timber frame extension - £26,268

Build a swimming pool - £81,268

Single storey extension - £60,360

Side return extension - £44,515

Install an RSJ - £2,468

Outbuilding - £10,268

Build a Mansard loft conversion - £52,268

Loft conversion - £36,263

Build a kitchen extension - £42,268

Hip to gable loft conversion - £42,268

Granny annexe - £87,268

Garden office - £10,268

Convert a Garage - £16,268

Garage - £18,768

Build a flat roof extension - £22,268

Build a dormer loft conversion - £42,268

Concrete foundations - £6,518

Convert a bungalow loft - £29,268

Convert a basement - £40,515