From £22,048
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in RM1. No obligation free quotes ...
1 review
From £22,192
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
From £22,024
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
From £22,392
Need an Extension Builder in RM1? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £22,152
I am a qualified, builder, electrician and plumber. I have been working in the construction industry for over 23 years and have built everything fr...
From £23,024
Buci builders ltd is a trusted extension builder serving customers in RM1 and the surrounding area. Contact us to today to get a competitive quote ...
From £22,312
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in RM1. Please contact us for a free, no obligat...
From £21,920
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £22,432
Krystian Wojasiewicz is a trusted extension builder serving customers in RM1 and the surrounding area. Contact us to today to get a competitive quo...
From £22,144
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in RM1. No obligation free quot...

A flat roof extension ranges from the cheapest of £21,920 (Nisup Building Services based in HA8) to the dearest of £23,024 (Buci builders ltd based in SE27), 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 RM1 by posting a job with HaMuch. We'll send it to extension builders in RM1.
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 - £17,764

Two storey extension - £88,396

Build a timber frame extension - £26,264

Build a swimming pool - £81,264

Single storey extension - £60,280

Side return extension - £44,470

Install an RSJ - £2,464

Outbuilding - £10,264

Build a Mansard loft conversion - £52,264

Loft conversion - £36,225

Build a kitchen extension - £42,264

Hip to gable loft conversion - £42,264

Granny annexe - £87,264

Garden office - £10,264

Convert a Garage - £16,264

Garage - £18,764

Build a flat roof extension - £22,264

Build a dormer loft conversion - £42,264

Concrete foundations - £6,514

Convert a bungalow loft - £29,264

Convert a basement - £40,470