From £22,240
M&J Brickwork Ltd are a Chelmsford based Bricklaying & General Building company that operate throughout the Essex and South London...
From £23,232
Optimus Build Solutions delivers exceptional construction services in London and surronding areas. Specializing in bathroom and kitchen refurbishme...
From £21,416
Welcome to RTC Plumbers! With over 15 years of experience, we offer a range of plumbing services from simple repairs to complex installations, each...
From £22,176
Witton & Pearce Builders in Essex is a trusted extension builder serving customers in Benfleet and the surrounding area. Contact us to today to get...
From £21,456
Experienced extension builder ready to quote for your work. Capital Roofing Ltd is the best extension builder in Benfleet. No obligation free quote...
From £22,272
P OUGHTON BUILDING is an established and experienced local extension builder in Benfleet. Please contact us for a free, no obligation quote and com...
From £22,160
Property Maintenance are here to help customers who need an Extension Builder in Benfleet. We offer a competitive rate to complete all your extensi...
From £22,360
Need an Extension Builder in Benfleet? Ellis & James Builders Limited has been helping local clients (20 mile radius) with their extension builderi...
From £22,224
Dalls Construction Limited prides in delivering an excellent extension buildering service and value for money in Benfleet and the surrounding areas...
From £22,008
Over 35 years experience
We are Gas Safe registered
We are Verified
We pride ourselves on great custom...

A flat roof extension ranges from the cheapest of £21,416 (RTC Plumbers based in RM6) to the dearest of £23,232 (Optimus Build Solutions based in Rm1), 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 Benfleet by posting a job with HaMuch. We'll send it to extension builders in Benfleet.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Thundersley | £38 | £251 |
| Build A Flat Roof Extension near Rayleigh | £39 | £252 |
| Build A Flat Roof Extension near Canvey Island | £39 | £256 |
| Build A Flat Roof Extension near Basildon | £39 | £251 |
| Build A Flat Roof Extension near Wickford | £39 | £255 |
| Build A Flat Roof Extension near Southend-on-Sea | £37 | £247 |
| Build A Flat Roof Extension near Stanford-le-Hope | £40 | £254 |
| Build A Flat Roof Extension near Billericay | £38 | £248 |
| Build A Flat Roof Extension near Thurrock | £41 | £260 |
| Build A Flat Roof Extension near Brentwood | £39 | £255 |
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 - £17,654

Two storey extension - £88,232

Build a timber frame extension - £26,154

Build a swimming pool - £81,154

Single storey extension - £58,088

Side return extension - £43,237

Install an RSJ - £2,354

Outbuilding - £10,154

Build a Mansard loft conversion - £52,154

Loft conversion - £35,198

Build a kitchen extension - £42,154

Hip to gable loft conversion - £42,154

Granny annexe - £87,154

Garden office - £10,154

Convert a Garage - £16,154

Garage - £18,654

Build a flat roof extension - £22,154

Build a dormer loft conversion - £42,154

Concrete foundations - £6,404

Convert a bungalow loft - £29,154

Convert a basement - £39,237