Add an outbuilding to your property in SL1 from £10,000

Outbuildings are the perfect way to add extra space to your property when you need a bit of quiet from the main house. Whether it's for a garden office, gym or workshop, an outbuilding can add value to your home and increase your quality of life.

Outbuilding cost in SL1 - Sort by rates or availability

From £10,176
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Self employed

(rates verified 05/10/26)

Hight quality of jobs

From £10,360
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M & A UK Ltd

(last active 06/10/26)

Relax... you have found a reliable extension builder in SL1. M & A UK Ltd is a friendly and reliable company based in SL1 who consider no job as to...

From £10,000
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EB Construction & Building Ltd

Member since July 2020

EB Construction & Building Ltd are here to help customers who need an Extension Builder in SL1. We offer a competitive rate to complete all your ex...

From £10,192
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Mamma V's Caribbean and English Cuisine

(last active 05/10/26)

Need to find an Extension Builder near you for all your extension buildering work?

Mamma V's Caribbean and English Cuisine provides a local...

From £10,112
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JJSR Construction Ltd

(last active 05/10/26)

JJSR Construction Ltd is an established and experienced local extension builder in SL1. Please contact us for a free, no obligation quote and compe...

From £10,464
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AV Home Improvements

(last active 05/10/26)

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...

From £10,312
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T M Builder

(last active 05/10/26)

Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

From £10,280
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ABC Associates STRUCTURES 4 U

Member since August 2026

Relax... you have found a reliable extension builder in SL1. ABC Associates STRUCTURES 4 U is a friendly and reliable company based in SL1 who cons...

From £10,168
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Newpark Construction

(last active 05/10/26)

Newpark Construction are here to help customers who need an Extension Builder in SL1. We offer a competitive rate to complete all your extension bu...

From £12,320
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Reid and Co Developments Ltd

(last active 05/10/26)
We are a well established buildng firm who have been providing building services and managing of projects now for 25 years. We have all the necessary ...

Outbuilding cost in SL1

Estimates for outbuilding near SL1

Outbuilding costs in SL1 range from the cheapest of £10,000 (EB Construction & Building Ltd based in HP2) to the dearest of £12,320 (Reid and Co Developments Ltd based in NW8), 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 SL1 by posting a job with HaMuch and we will send it to extension builders.

"Outbuilding" - SLOUGH, job posted 01/01/70


Get extension builder rates instantly

Get extension builder rates instantly (excluding VAT or callout charges)
Location in UKHourly RateDaily Rate
Outbuilding near Slough£42£272
Outbuilding near Windsor & Maidenhead£42£272
Outbuilding near Windsor£41£271
Outbuilding near Maidenhead£41£273
Outbuilding near Gerrards Cross£43£282
Outbuilding near Egham£42£266
Outbuilding near Staines-upon-Thames£42£269
Outbuilding near Hillingdon£63£276
Outbuilding near Ascot£41£276
Outbuilding near Bracknell Forest£41£287

Estimates for common extension builder jobs in SL1;

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.

More extensions & conversions cost guides...