From £51,920
Experienced extension builder ready to quote for your work. BBS & sons construction uk ltd is the best extension builder in Rayners Lane. No obliga...
From £52,504
MGJ Construction House Renovation is an established extension buildering business in Rayners Lane. We come highly recommended and provide competiti...
From £52,040
Relax... you have found a reliable extension builder in Rayners Lane. Prospective Builders Ltd is a friendly and reliable company based in Rayners ...
From £51,992
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £52,488
We pride ourselves on going that extra mile to ensure our jobs stand out from the rest. We work closely with our clients to carefully understand th...
From £52,328
Need an Extension Builder in Rayners Lane? H CAROLAN CONSTRUCTION has been helping local clients (10 mile radius) with their extension buildering j...
From £52,160
Relax... you have found a reliable extension builder in Rayners Lane. OM BUILDERS is a friendly and reliable company based in Rayners Lane who cons...
From £52,480
Trusted and professional extension builder in Rayners Lane. Experienced in all extension buildering work and keeping within budget and on quote. K ...
From £51,984
We are a team of professionals who specialise in: Kitchen Installation Kitchen and Bathroom refurbishment Bespoke furniture for: Kitchen Livi...
From £52,080
Relax... you have found a reliable extension builder in Rayners Lane. West7Services UK is a friendly and reliable company based in Rayners Lane who...

Mansard loft conversions range from the cheapest installation of £51,920 (BBS & sons construction uk ltd based in HA2) to the dearest of around £52,504 (MGJ Construction House Renovation based in HA2).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in Rayners Lane by posting a job with HaMuch and we'll send it to extension builders in Rayners Lane.
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 - £17,698

Two storey extension - £88,296

Build a timber frame extension - £26,198

Build a swimming pool - £81,198

Single storey extension - £58,952

Side return extension - £43,723

Install an RSJ - £2,398

Outbuilding - £10,198

Build a Mansard loft conversion - £52,198

Loft conversion - £35,603

Build a kitchen extension - £42,198

Hip to gable loft conversion - £42,198

Granny annexe - £87,198

Garden office - £10,198

Convert a Garage - £16,198

Garage - £18,698

Build a flat roof extension - £22,198

Build a dormer loft conversion - £42,198

Concrete foundations - £6,448

Convert a bungalow loft - £29,198

Convert a basement - £39,723