From £10,048
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 £10,192
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 £10,392
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 £10,152
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 £11,024
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 £10,312
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in RM1. Please contact us for a free, no obligat...
From £9,920
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £10,432
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 £10,144
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in RM1. No obligation free quot...
From £9,904
V.S.P is a trusted extension builder serving customers in RM1 and the surrounding area. Contact us to today to get a competitive quote for extensio...

Outbuilding costs in RM1 range from the cheapest of £9,904 (V.S.P based in NW10) to the dearest of £11,024 (Buci builders ltd based in SE27), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in RM1 by posting a job with HaMuch and we will send it to extension builders.
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 - £17,752

Two storey extension - £88,378

Build a timber frame extension - £26,252

Build a swimming pool - £81,252

Single storey extension - £60,040

Side return extension - £44,335

Install an RSJ - £2,452

Outbuilding - £10,252

Build a Mansard loft conversion - £52,252

Loft conversion - £36,113

Build a kitchen extension - £42,252

Hip to gable loft conversion - £42,252

Granny annexe - £87,252

Garden office - £10,252

Convert a Garage - £16,252

Garage - £18,752

Build a flat roof extension - £22,252

Build a dormer loft conversion - £42,252

Concrete foundations - £6,502

Convert a bungalow loft - £29,252

Convert a basement - £40,335