Build a single storey extension in RM8 from £53,400

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Single storey extension cost in RM8

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J&J Building Solutions

From £55,960

(rates verified 18/09/26)

Location

Streatham, SW16

Experienced extension builder ready to quote for your work. J&J Building Solutions is the best extension builder in RM8. No obligation free quotes ...

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WHITE EAGLE CONSTRUCTION LTD

From £55,960

(last active 27/09/26)

Location

Colindale, NW9

Trusted and professional extension builder in RM8. Experienced in all extension buildering work and keeping within budget and on quote. WHITE EAGLE...

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Samuele Paolini

From £62,840

(last active 27/09/26)

Location

Cricklewood, NW2

Need an Extension Builder in RM8? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...

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LCD Pixel Construction Ltd

From £58,200

(last active 27/09/26)

Location

Belmont, SM2

Homeowners look no further if you want a qualified extension builder to work in your home. LCD Pixel Construction Ltd are tidy and neat, providing ...

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Masonic Plumbing and Heating Ltd

From £53,400

(last active 27/09/26)

Location

Keston, BR2

Masonic Plumbing and Heating Ltd are here to help customers who need an Extension Builder in RM8. We offer a competitive rate to complete all your ...

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Gb construction

From £58,840

(last active 27/09/26)

Location

Sanderstead Croydon, CR2

Gb construction are here to help customers who need an Extension Builder in RM8. We offer a competitive rate to complete all your extension builde...

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CC&D BUILDING LTD

From £58,680

(last active 26/09/26)

Location

London, E7

Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in RM8. No obligation free quotes and m...

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Rafix Building

From £66,200

(last active 26/09/26)

Location

Cockfosters, EN4

Our homes need to be regularly maintained and from time to time they need to be rejuvenated, modernised and enhanced. When it comes to building wor...

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Mr

From £56,920

(last active 26/09/26)

Location

London, NW10

Experienced extension builder ready to quote for your work. Mr is the best extension builder in RM8. No obligation free quotes and many happy custo...

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JK Doors

From £54,680

(last active 26/09/26)

Location

Fitzrovia, W1W

JK Doors is a trusted extension builder serving customers in RM8 and the surrounding area. Contact us to today to get a competitive quote for exten...

Extension builder estimates (based on hourly rates) to build a single storey extension in RM8

Estimates for single storey extension near RM8

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Estimates for common extension builder jobs in RM8;

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

Underpin a building - £17,658

Two storey extension

Two storey extension - £88,238

Build a timber frame extension

Build a timber frame extension - £26,158

Build a swimming pool

Build a swimming pool - £81,158

Single storey extension

Single storey extension - £58,168

Side return extension

Side return extension - £43,282

Install an RSJ

Install an RSJ - £2,358

Outbuilding

Outbuilding - £10,158

Build a Mansard loft conversion

Build a Mansard loft conversion - £52,158

Loft conversion

Loft conversion - £35,235

Build a kitchen extension

Build a kitchen extension - £42,158

Hip to gable loft conversion

Hip to gable loft conversion - £42,158

Granny annexe

Granny annexe - £87,158

Garden office

Garden office - £10,158

Convert a Garage

Convert a Garage - £16,158

Garage

Garage - £18,658

Build a flat roof extension

Build a flat roof extension - £22,158

Build a dormer loft conversion

Build a dormer loft conversion - £42,158

Concrete foundations

Concrete foundations - £6,408

Convert a bungalow loft

Convert a bungalow loft - £29,158

Convert a basement

Convert a basement - £39,282

More extensions & conversions cost guides...