Khalid Osman
We agree on the work, price and appointment before starting. Our approach focuses on clear communication, punctuality, careful workmanship and leav...
SLS BUILDERS LIMITED is a trusted extension builder serving customers in Fitzrovia and the surrounding area. Contact us to today to get a competiti...
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
Torrington Design
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
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in Fitzrovia. M & A UK Ltd is a friendly and reliable company based in Fitzrovia who consider ...
Jay Reid
Darren Bergin
Relax... you have found a reliable extension builder in Fitzrovia. First guard Roofing is a friendly and reliable company based in Fitzrovia who co...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Fitzrovia and the surrounding area. Contact us to today to g...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Fitzrovia. We offer a competitive rate to complete all your extensi...

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 Fitzrovia by posting your job to extension builders in Fitzrovia.
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 - £17,838

Two storey extension - £88,508

Build a timber frame extension - £26,338

Build a swimming pool - £81,338

Single storey extension - £61,768

Side return extension - £45,307

Install an RSJ - £2,538

Outbuilding - £10,338

Build a Mansard loft conversion - £52,338

Loft conversion - £36,923

Build a kitchen extension - £42,338

Hip to gable loft conversion - £42,338

Granny annexe - £87,338

Garden office - £10,338

Convert a Garage - £16,338

Garage - £18,838

Build a flat roof extension - £22,338

Build a dormer loft conversion - £42,338

Concrete foundations - £6,588

Convert a bungalow loft - £29,338

Convert a basement - £41,307