From £34,200
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in CR9. No obligation free quotes ...
From £37,725
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £36,675
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in CR9. Please contact us for a free, no obligat...
From £37,425
Need an Extension Builder in CR9? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
From £33,000
NISUP BUILDING SERVICES Company specializes in the domestic and commercial building industry :1. Refurbishm...
From £37,800
Krystian Wojasiewicz is a trusted extension builder serving customers in CR9 and the surrounding area. Contact us to today to get a competitive quo...
From £37,800
Platinum Electrics is a Branch off Platinum Premier Projects who deal in all types of construction projects. Platinum Electrics are based in London...
From £35,100
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in CR9. No obligation free quot...
From £36,600
Hi we have 15 years of experience in building and construction industry our specialization is bathrooms and renovations please have a look at the w...
From £32,850
V.S.P is a trusted extension builder serving customers in CR9 and the surrounding area. Contact us to today to get a competitive quote for extensio...

Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in CR9 by posting your job to extension builders in CR9.
"Loft conversion to be done" - CROYDON, job posted 01/01/70
"Loft conversion, 1 bedroom with en suite bathroom, remove chimney breast in the attic, and remove chimney breast in the bedroom." - CROYDON, job posted 01/01/70
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 - £17,731

Two storey extension - £88,347

Build a timber frame extension - £26,231

Build a swimming pool - £81,231

Single storey extension - £59,624

Side return extension - £44,101

Install an RSJ - £2,431

Outbuilding - £10,231

Build a Mansard loft conversion - £52,231

Loft conversion - £35,918

Build a kitchen extension - £42,231

Hip to gable loft conversion - £42,231

Granny annexe - £87,231

Garden office - £10,231

Convert a Garage - £16,231

Garage - £18,731

Build a flat roof extension - £22,231

Build a dormer loft conversion - £42,231

Concrete foundations - £6,481

Convert a bungalow loft - £29,231

Convert a basement - £40,101