Need an Extension Builder in Dartford? Tony Rutter has been helping local clients (10 mile radius) with their extension buildering jobs for many ye...
Relax... you have found a reliable extension builder in Dartford. Sevcan Construction is a friendly and reliable company based in Dartford who cons...
Kunshi Services UK Ltd is a trusted extension builder serving customers in Dartford and the surrounding area. Contact us to today to get a competit...
R Tredget & Son are here to help customers who need an Extension Builder in Dartford. We offer a competitive rate to complete all your extension bu...
Tommy House
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in Dartford and the surrounding area. Contact us to today to get a...
Need an Extension Builder in Dartford? MONOLITH CONSTRUCTION LTD has been helping local clients (10 mile radius) with their extension buildering jo...
Buildem Ltd is a trusted extension builder serving customers in Dartford and the surrounding area. Contact us to today to get a competitive quote f...
Moss Roofing & Sons is an established and experienced local extension builder in Dartford. Please contact us for a free, no obligation quote and co...
Chris Rogers
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Joe
FLEX CONSTRUCTION LIMITED are here to help customers who need an Extension Builder in Dartford. We offer a competitive rate to complete all your ex...

A flat roof extension ranges from the cheapest of £22,064 (Moss Roofing & Sons based in RM13) to the dearest of £22,616 (HOUSE BUILDING SERVICES LIMITED based in DA16), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in Dartford by posting a job with HaMuch. We'll send it to extension builders in Dartford.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Dartford | £41 | £265 |
| Build A Flat Roof Extension near Bexley | £42 | £265 |
| Build A Flat Roof Extension near South Ockendon | £42 | £264 |
| Build A Flat Roof Extension near Grays | £41 | £261 |
| Build A Flat Roof Extension near Northfleet | £41 | £261 |
| Build A Flat Roof Extension near Chafford Hundred | £41 | £261 |
| Build A Flat Roof Extension near Thurrock | £41 | £260 |
| Build A Flat Roof Extension near Gravesend | £40 | £260 |
| Build A Flat Roof Extension near Barking | £43 | £261 |
| Build A Flat Roof Extension near Bromley | £43 | £268 |
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 - £17,767

Two storey extension - £88,401

Build a timber frame extension - £26,267

Build a swimming pool - £81,267

Single storey extension - £60,344

Side return extension - £44,506

Install an RSJ - £2,467

Outbuilding - £10,267

Build a Mansard loft conversion - £52,267

Loft conversion - £36,255

Build a kitchen extension - £42,267

Hip to gable loft conversion - £42,267

Granny annexe - £87,267

Garden office - £10,267

Convert a Garage - £16,267

Garage - £18,767

Build a flat roof extension - £22,267

Build a dormer loft conversion - £42,267

Concrete foundations - £6,517

Convert a bungalow loft - £29,267

Convert a basement - £40,506