From £34,200
Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in SE28. No obligation free quotes...
From £39,000
Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...
From £34,650
Experienced extension builder ready to quote for your work. Mr is the best extension builder in SE28. No obligation free quotes and many happy cust...
From £33,600
JK Doors is a trusted extension builder serving customers in SE28 and the surrounding area. Contact us to today to get a competitive quote for exte...
From £35,550
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
From £37,425
Need an Extension Builder in SE28? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many ye...
From £36,675
skilled worker who specializes in completing a wide range of building and renovation projects
From £39,525
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in SE28 and the surrounding area. Contact us to today to get a com...
From £32,700
Member since April 2025
Trusted and professional extension builder in SE28. Experienced in all extension buildering work and keeping within budget and on quote. GR MAINTEN...
From £35,625
Relax... you have found a reliable extension builder in SE28. Derryard Construction Ltd is a friendly and reliable company based in SE28 who consid...

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 SE28 by posting your job to extension builders in SE28.
"Loft conversion" - ERITH, job posted 08/09/25
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 - £17,729

Two storey extension - £88,343

Build a timber frame extension - £26,229

Build a swimming pool - £81,229

Single storey extension - £59,576

Side return extension - £44,074

Install an RSJ - £2,429

Outbuilding - £10,229

Build a Mansard loft conversion - £52,229

Loft conversion - £35,895

Build a kitchen extension - £42,229

Hip to gable loft conversion - £42,229

Granny annexe - £87,229

Garden office - £10,229

Convert a Garage - £16,229

Garage - £18,729

Build a flat roof extension - £22,229

Build a dormer loft conversion - £42,229

Concrete foundations - £6,479

Convert a bungalow loft - £29,229

Convert a basement - £40,074