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Jay Christenson
Experienced extension builder ready to quote for your work. Jmc buildets is the best extension builder in Dartford. No obligation free quotes and m...
RLD Contractors Ltd is an established and experienced local extension builder in Dartford. Please contact us for a free, no obligation quote and co...
Trusted and professional extension builder in Dartford. Experienced in all extension buildering work and keeping within budget and on quote. AM Bui...
Need an Extension Builder in Dartford? RJC BUILDING SERVICES has been helping local clients (10 mile radius) with their extension buildering jobs f...
Experienced extension builder ready to quote for your work. NA Brickwork is the best extension builder in Dartford. No obligation free quotes and m...
Need to find an Extension Builder near you for all your extension buildering work?
Master Builders provides a local, trusted extension buil...
Relax... you have found a reliable extension builder in Dartford. UNIVERSAL CONSTRUCTION is a friendly and reliable company based in Dartford who c...
Curtis Archer
Relax... you have found a reliable extension builder in Dartford. POVERSET BUILDING COMPANY is a friendly and reliable company based in Dartford wh...
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...

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 Dartford by posting your job to extension builders in Dartford.
"Loft conversion" - DARTFORD, job posted 03/04/25
"Loft conversion spring/summer 2025, we are looking for quote.." - RM13, job posted 01/01/70
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Loft Conversion near Dartford | £41 | £265 |
| Loft Conversion near Bexley | £42 | £265 |
| Loft Conversion near South Ockendon | £42 | £264 |
| Loft Conversion near Grays | £41 | £261 |
| Loft Conversion near Northfleet | £41 | £261 |
| Loft Conversion near Chafford Hundred | £41 | £261 |
| Loft Conversion near Thurrock | £41 | £260 |
| Loft Conversion near Gravesend | £40 | £260 |
| Loft Conversion near Barking | £43 | £261 |
| Loft Conversion 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 - £17,530

Two storey extension - £88,044

Build a timber frame extension - £26,030

Build a swimming pool - £81,030

Single storey extension - £55,592

Side return extension - £41,833

Install an RSJ - £2,230

Outbuilding - £10,030

Build a Mansard loft conversion - £52,030

Loft conversion - £34,028

Build a kitchen extension - £42,030

Hip to gable loft conversion - £42,030

Granny annexe - £87,030

Garden office - £10,030

Convert a Garage - £16,030

Garage - £18,530

Build a flat roof extension - £22,030

Build a dormer loft conversion - £42,030

Concrete foundations - £6,280

Convert a bungalow loft - £29,030

Convert a basement - £37,833