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DHB Builders
Trusted and professional extension builder in Seaham. Experienced in all extension buildering work and keeping within budget and on quote. DHB Buil...
"Build a two storey extension" - SR2, job posted 27/11/25
LJP Roofing
LJP Roofing are here to help customers who need an Extension Builder in Seaham. We offer a competitive rate to complete all your extension builderi...
"Build a dormer loft conversion" - SR3, job posted 02/09/25
RAINTON CONSTRUCTION LTD
RAINTON CONSTRUCTION LTD is an established and experienced local extension builder in Seaham. Please contact us for a free, no obligation quote and...
"Garage conversion" - DH4, job posted 18/05/24
Building Craft Ltd
Building Craft Ltd is an established extension buildering business in Seaham. We come highly recommended and provide competitive quotes for your wo...
COUSINS BUILDG & RFING SRV LTD
Ian
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
David Robertson builders
David Robertson
Trusted and professional extension builder in Seaham. Experienced in all extension buildering work and keeping within budget and on quote. David R...
STEVE MULVANEY BUILDING
STEVE MULVANEY BUILDING are here to help customers who need an Extension Builder in Seaham. We offer a competitive rate to complete all your extens...
£35/hr
£239/day
Home Grown NE
Our building services company Home Grown NE has been providing professional, trustworthy building services to customers throughout the North-East f...
£38/hr
£259/day
J T Lofts
Homeowners look no further if you want a qualified extension builder to work in your home. J T Lofts are tidy and neat, providing a quality extensi...
Compare Seaham extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Seaham | £35 | £235 |
| Extension Builders near Peterlee | £36 | £230 |
| Extension Builders near Sunderland | £33 | £251 |
| Extension Builders near Washington | £33 | £254 |
| Extension Builders near Durham | £47 | £267 |
| Extension Builders near Chester-le-Street | £35 | £242 |
| Extension Builders near South Tyneside | £34 | £261 |
| Extension Builders near Jarrow | £34 | £262 |
| Extension Builders near Hartlepool | £40 | £236 |
| Extension Builders near South Shields | £36 | £257 |
Job estimates from extension builders near you
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.

Build a timber frame extension - £26,280

Garden office - £10,280

Granny annexe - £87,280

Build a flat roof extension - £22,280

Convert a Garage - £16,280

Hip to gable loft conversion - £42,280

Convert a bungalow loft - £29,280

Build a dormer loft conversion - £42,280

Build a swimming pool - £81,280

Build a Mansard loft conversion - £52,280

Concrete foundations - £6,530

Underpin a building - £17,780

Two storey extension - £88,420

Convert a basement - £40,650

Side return extension - £44,650

Loft conversion - £36,375

Garage - £18,780

Single storey extension - £60,600

Outbuilding - £10,280

Install an RSJ - £2,480

Build a kitchen extension - £42,280
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