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J Wijayamohan
JJSR Construction Ltd is an established and experienced local extension builder in Rayners Lane. Please contact us for a free, no obligation quote ...
Mario Prajar Building Services is an established and experienced local extension builder in Rayners Lane. Please contact us for a free, no obligati...
Need to find an Extension Builder near you for all your extension buildering work?
MAX CONSTRUCTION LTD provides a local, trusted extension...
RLC Construction are here to help customers who need an Extension Builder in Rayners Lane. We offer a competitive rate to complete all your extensi...
Vital Builders are here to help customers who need an Extension Builder in Rayners Lane. We offer a competitive rate to complete all your extension...
Relax... you have found a reliable extension builder in Rayners Lane. C T Edwards is a friendly and reliable company based in Rayners Lane who cons...
Need to find an Extension Builder near you for all your extension buildering work?
J K GENERAL BUILDING LTD provides a local, trusted exten...
Relax... you have found a reliable extension builder in Rayners Lane. Building Service and Support Ltd is a friendly and reliable company based in ...
ALG Renovations is a well established, trustworthy, reliable and professional operation with over 17 years experience myself in the trade, base...
Chrysalis are here to help customers who need an Extension Builder in Rayners Lane. We offer a competitive rate to complete all your extension buil...

Outbuilding costs in Rayners Lane range from the cheapest of £9,880 (MAX CONSTRUCTION LTD based in HA4) to the dearest of £10,368 (Building Service and Support Ltd based in HA5), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in Rayners Lane by posting a job with HaMuch and we will send it to extension builders.
"Outbuilding" - HA4, job posted 03/11/25
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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 - £17,611

Two storey extension - £88,167

Build a timber frame extension - £26,111

Build a swimming pool - £81,111

Single storey extension - £57,224

Side return extension - £42,751

Install an RSJ - £2,311

Outbuilding - £10,111

Build a Mansard loft conversion - £52,111

Loft conversion - £34,793

Build a kitchen extension - £42,111

Hip to gable loft conversion - £42,111

Granny annexe - £87,111

Garden office - £10,111

Convert a Garage - £16,111

Garage - £18,611

Build a flat roof extension - £22,111

Build a dormer loft conversion - £42,111

Concrete foundations - £6,361

Convert a bungalow loft - £29,111

Convert a basement - £38,751