1 review
From £88,288
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
From £88,468
Local Boiler Plumbing & Heating Services is an established and experienced local extension builder in CM15. Please contact us for a free, no obliga...
From £88,276
Experienced extension builder ready to quote for your work. CC&D BUILDING LTD is the best extension builder in CM15. No obligation free quotes and ...
From £88,276
Relax... you have found a reliable extension builder in CM15. First guard Roofing is a friendly and reliable company based in CM15 who consider no ...
From £88,924
HOUSE BUILDING SERVICES LIMITED is a trusted extension builder serving customers in CM15 and the surrounding area. Contact us to today to get a com...
From £87,820
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £88,372
At Building Services Contractors we pride ourselves on an efficient and friendly service, and strive to achieve 100% customer satisfaction.
From £90,376
Propello is an established and experienced local extension builder in CM15. Please contact us for a free, no obligation quote and competitive rate...
From £88,636
Nouvell Decor is a trusted extension builder serving customers in CM15 and the surrounding area. Contact us to today to get a competitive quote for...
From £88,468
skilled worker who specializes in completing a wide range of building and renovation projects

Costs range from £87,820 (Can design and Construction based in Ig11) to £90,376 (Propello based in E17), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
Post your job on HaMuch and we'll send it to extension builders to CM15.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Brentwood | £39 | £255 |
| Two Storey Extension near Billericay | £38 | £248 |
| Two Storey Extension near Romford | £45 | £274 |
| Two Storey Extension near Basildon | £39 | £251 |
| Two Storey Extension near South Ockendon | £58 | £276 |
| Two Storey Extension near Chelmsford | £38 | £258 |
| Two Storey Extension near Wickford | £39 | £255 |
| Two Storey Extension near Stanford-le-Hope | £40 | £254 |
| Two Storey Extension near Loughton | £44 | £273 |
| Two Storey Extension near Thurrock | £41 | £260 |
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 - £17,894

Two storey extension - £88,590

Build a timber frame extension - £26,394

Build a swimming pool - £81,394

Single storey extension - £62,872

Side return extension - £45,928

Install an RSJ - £2,594

Outbuilding - £10,394

Build a Mansard loft conversion - £52,394

Loft conversion - £37,440

Build a kitchen extension - £42,394

Hip to gable loft conversion - £42,394

Granny annexe - £87,394

Garden office - £10,394

Convert a Garage - £16,394

Garage - £18,894

Build a flat roof extension - £22,394

Build a dormer loft conversion - £42,394

Concrete foundations - £6,644

Convert a bungalow loft - £29,394

Convert a basement - £41,928