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Buildmac Ltd
Chris Czerwinski
About us: Buildmac Ltd is a well-established, trustworthy, reliable and professional business based in High Wycombe, covering all surrounding areas...
"Single storey extension" - HP11, job posted 25/09/26
ABC Associates STRUCTURES 4 U
Relax... you have found a reliable extension builder in Wycombe. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in Wycombe ...
"Single storey extension side extention with bathroom and two velux windows 5mx3.2m single story rear extention for dinner 2.6m x 3.5 m" - HP11, job posted 18/07/26
Loudwater Building Services
Need to find an Extension Builder near you for all your extension buildering work?
Loudwater Building Services provides a local, trusted ex...
"Building cluster body cluster board cluster board and +3" - SL7, job posted 16/05/26
Mitchell & Co Building & Renovations Ltd
Mitchell & Co Building & Renovations Ltd is an established extension buildering business in Wycombe. We come highly recommended and provide competi...
"Hip to gable Dormer loft conversion" - HIGH WYCOMBE, job posted 05/10/25
Building High Wycombe
Relax... you have found a reliable extension builder in Wycombe. Building High Wycombe is a friendly and reliable company based in Wycombe who cons...
"Single storey extension" - MARLOW, job posted 14/08/25
jesson ladscaping and construction
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Rear and side extension to 1960s detached house" - HP14, job posted 23/07/25
Steve Knight Construction
Steve Knight Construction is a High Wycombe based Building Company with 38 years experience in all aspects of the Construction Industry. We are abl...
"Single storey extension" - HIGH WYCOMBE, job posted 06/10/24
GREENWORKS CONSTRUCTION
GREENWORKS CONSTRUCTION is an established and experienced local extension builder in Wycombe. Please contact us for a free, no obligation quote and...
"Single storey extension" - HIGH WYCOMBE, job posted 20/08/24
JAYEM BUILDING SERVICES LTD
Need to find an Extension Builder near you for all your extension buildering work?
JAYEM BUILDING SERVICES LTD provides a local, trusted ex...
"Side return extension" - WYCOMBE, job posted 10/04/24
Charts Project Management and Build
Our building services company Charts Project Management and Build has been helping customers in Buckinghamshire and the surrounding area by providi...
"Hi , I am looking for quote for rear extension of 76.5 sq meters? Thanks, Deven" - HP12, job posted 18/12/23
Shaks build
Trusted and professional extension builder in Wycombe. Experienced in all extension buildering work and keeping within budget and on quote. Shaks b...
"7 by 6 rear extension plus loft conversion" - HIGH WYCOMBE, job posted 16/12/23
Chris Warren Construction Ltd
Chris Warren Construction Ltd is an established extension buildering business in Wycombe. We come highly recommended and provide competitive quotes...
E E Construction
E E Construction is an established extension buildering business in Wycombe. We come highly recommended and provide competitive quotes for your wor...
£37/hr
£254/day
Porter & Son Ltd
Porter & Son Ltd is a trusted extension builder serving customers in Wycombe and the surrounding area. Contact us to today to get a competitive quo...
£44/hr
£285/day
Stonehouse Consultants
Stonehouse Consultants is an independent specialist construction consultancy delivering a range of quality construction services to projects throug...
£43/hr
£284/day
G T Builders
Trusted and professional extension builder in Wycombe. Experienced in all extension buildering work and keeping within budget and on quote. G T Bui...
£40/hr
£259/day
Chamfer Projects
As a full-service provider, we are dedicated to delivering an outstanding fit out experience for all of our customers. With our innovative designs,...
£37/hr
£247/day
Complete Home Development
Georgie Noone has worked in the property industry for the last 15 years, undertaking house refurbishments, extensions and new builds. She has worke...
£37/hr
£303/day
S Halls Construction Ltd
Shane
Here at S Halls Construction Ltd, we undertake all hard landscaping works. Patios, driveways, fencing and groundworks, we also cover many areas of ...
£40/hr
£265/day
SPACE Design. Build. Interiors
Relax... you have found a reliable extension builder in Wycombe. SPACE Design. Build. Interiors is a friendly and reliable company based in Wycombe...
Compare Wycombe extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Wycombe | £40 | £271 |
| Extension Builders near High Wycombe | £39 | £272 |
| Extension Builders near Hazlemere | £40 | £272 |
| Extension Builders near Maidenhead | £41 | £273 |
| Extension Builders near Chesham | £42 | £277 |
| Extension Builders near Gerrards Cross | £43 | £283 |
| Extension Builders near South Oxfordshire | £36 | £253 |
| Extension Builders near Aylesbury | £42 | £270 |
| Extension Builders near Slough | £42 | £272 |
| Extension Builders near Caversham | £38 | £265 |
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 - £26,160

Garden office - £10,160

Granny annexe - £87,160

Build a flat roof extension - £22,160

Convert a Garage - £16,160

Hip to gable loft conversion - £42,160

Convert a bungalow loft - £29,160

Build a dormer loft conversion - £42,160

Build a swimming pool - £81,160

Build a Mansard loft conversion - £52,160

Concrete foundations - £6,410

Underpin a building - £17,660

Two storey extension - £88,240

Convert a basement - £39,300

Side return extension - £43,300

Loft conversion - £35,250

Garage - £18,660

Single storey extension - £58,200

Outbuilding - £10,160

Install an RSJ - £2,360

Build a kitchen extension - £42,160
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