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Mandala Building Services
Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
"Loft conversion" - WD7, job posted 30/08/26
JJSR Construction Ltd
J Wijayamohan
JJSR Construction Ltd is an established and experienced local extension builder in Watford. Please contact us for a free, no obligation quote and c...
"Two storey extension" - WD3, job posted 13/05/26
BKB Building Contractors
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Loft conversion" - WD19, job posted 07/05/26
L H Builders
Relax... you have found a reliable extension builder in Watford. L H Builders is a friendly and reliable company based in Watford who consider no j...
"Looking for a loft conversion with a flat shed dormer (1 bed and bathroom) i have plans which have been submitted so looking for quotes" - WD24, job posted 26/12/25
Fitz Building Services Limited
Need to find an Extension Builder near you for all your extension buildering work?
Fitz Building Services Limited provides a local, trusted...
"Loft conversion" - WD24, job posted 07/12/25
EDGWARE BUILDER
EDGWARE BUILDER are here to help customers who need an Extension Builder in Watford. We offer a competitive rate to complete all your extension bui...
"Side return extension" - WD18, job posted 09/10/25
HARLEY BUILDING SERVICES LTD
HARLEY BUILDING SERVICES LTD are here to help customers who need an Extension Builder in Watford. We offer a competitive rate to complete all your ...
"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Existing Kitchen Width (internal): 2.01 metres ..." - WD18, job posted 07/08/25
D Bradshaw Building Renovation
D Bradshaw Building Renovation is a trusted extension builder serving customers in Watford and the surrounding area. Contact us to today to get a c...
"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Property Type: Mid-terrace house Location: WD18,..." - WATFORD, job posted 07/08/25
AV Home Improvements
In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
"Single storey extension" - WATFORD, job posted 26/05/25
Sharp Building Ltd
Sharp Building Ltd is an established and experienced local extension builder in Watford. Please contact us for a free, no obligation quote and comp...
"Garage conversion" - PINNER, job posted 24/03/25
Mario Prajar Building Services
Mario Prajar Building Services is an established and experienced local extension builder in Watford. Please contact us for a free, no obligation qu...
"Hip to gable loft conversion" - WD24, job posted 28/01/25
MAX CONSTRUCTION LTD
Need to find an Extension Builder near you for all your extension buildering work?
MAX CONSTRUCTION LTD provides a local, trusted extension...
"Two storey extension" - HA7, job posted 13/01/25
RLC Construction
RLC Construction are here to help customers who need an Extension Builder in Watford. We offer a competitive rate to complete all your extension bu...
"Loft conversion - (2 Rooms and a shower) Total Area - 40 square metres)" - WD19, job posted 29/12/24
Vital Builders
Vital Builders are here to help customers who need an Extension Builder in Watford. We offer a competitive rate to complete all your extension buil...
"Loft conversion" - WD17, job posted 27/12/24
C T Edwards
Relax... you have found a reliable extension builder in Watford. C T Edwards is a friendly and reliable company based in Watford who consider no jo...
"Two storey extension" - WATFORD, job posted 16/12/24
Building Service and Support Ltd
Relax... you have found a reliable extension builder in Watford. Building Service and Support Ltd is a friendly and reliable company based in Watfo...
"Side return extension" - WD17, job posted 05/03/24
J K GENERAL BUILDING LTD
Need to find an Extension Builder near you for all your extension buildering work?
J K GENERAL BUILDING LTD provides a local, trusted exten...
ALG Renovations
ALG Renovations is a well established, trustworthy, reliable and professional operation with over 17 years experience myself in the trade, base...
COMPLETE CIVIL ENGINEERING
Ciaran Feeney
Need to find an Extension Builder near you for all your extension buildering work?
COMPLETE CIVIL ENGINEERING provides a local, trusted ext...
Chrysalis
Chrysalis are here to help customers who need an Extension Builder in Watford. We offer a competitive rate to complete all your extension builderin...
Compare Watford extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Watford | £43 | £280 |
| Extension Builders near Bushey | £43 | £278 |
| Extension Builders near Rickmansworth | £43 | £282 |
| Extension Builders near Borehamwood | £42 | £271 |
| Extension Builders near Harrow | £43 | £270 |
| Extension Builders near Hillingdon | £43 | £276 |
| Extension Builders near Gerrards Cross | £43 | £283 |
| Extension Builders near St Albans | £43 | £272 |
| Extension Builders near Dacorum | £42 | £275 |
| Extension Builders near Hemel Hempstead | £43 | £276 |
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 - £26,184
Garden office - £10,184
Granny annexe - £87,184
Build a flat roof extension - £22,184
Convert a Garage - £16,184
Hip to gable loft conversion - £42,184
Convert a bungalow loft - £29,184
Build a dormer loft conversion - £42,184
Build a swimming pool - £81,184
Build a Mansard loft conversion - £52,184
Concrete foundations - £6,434
Underpin a building - £17,684
Two storey extension - £88,276
Convert a basement - £39,570
Side return extension - £43,570
Loft conversion - £35,475
Garage - £18,684
Single storey extension - £58,680
Outbuilding - £10,184
Install an RSJ - £2,384
Build a kitchen extension - £42,184
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