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Extension builders in Coventry

The 10 extension builders from Google's results for Coventry, ranked on Google rating, online presence and other factors. Updated 10 September 2026.

Single storey, per m²
£1,700 – £2,400shell to finished
Typical single storey
£38,000 – £52,500around 20 m²
Double storey
£52,500 – £85,500around 30 m² over two floors
Coventry vs UK
-5%below the UK median

Number 1: Bd Builders Coventry

5.0(21)out of 5, from 21 reviewson GoogleUpper Eastern Green, Coventry

Bd Builders Coventry undertakes residential building and landscaping projects across Coventry and Warwickshire. Its services include extensions, loft and garage conversions, garden rooms, new builds, kitchens, bathrooms, and general joinery.

024 7510 5487 Unit 9B, 405 Broad Ln, Upper Eastern Green, Coventry CV5 7AX

Number 2: Sj Building Electrical

5.0(5)out of 5, from 5 reviewson GoogleCoventry

Construction services from Sj Building Electrical cover single and multi-storey extensions, loft conversions and garage conversions across Coventry and Warwickshire. The team handles projects from initial design through to completion, alongside kitchen and bathroom renovations.

07738 474527

Number 3: Building Contractor in Coventry, Building Contractor in ...

5.0(4)out of 5, from 4 reviewson GoogleCoventry

Homer Builders Ltd carries out house extensions, loft conversions, property refurbishments, and structural alterations. Its building contractors cover Coventry, Leamington Spa, Kenilworth, and nearby areas.

07718 001059 21 The Drive, Coventry CV2 5FT

Number 4: Fox Windows and Doors

4.8(105)out of 5, from 105 reviewson GoogleKenilworth

Home extension installations are provided by Fox Windows and Doors for residential properties across Coventry and the West Midlands. The company assists clients looking to add extra space to their homes.

01926 754044 Avenue M, Kenilworth CV8 2LG

Number 5: Simms Building

5.0(1)out of 5, from 1 reviewson GoogleCoventry

Simms Building carries out residential home extensions across Coventry, delivering turnkey construction services from site surveys to final build. The team works alongside client architects or prepares custom plans to create extra living space.

024 7531 4576 Unit 33 Arches Industrial Estate, Coventry CV1 3JQ

Number 6: House Extensions Coventry & Leamington Spa

4.3(11)out of 5, from 11 reviewson GoogleCoventry

Dave McLeod supplies domestic and commercial building services in Coventry and Leamington Spa. Work includes single-storey builds, kitchen extensions, and garden room construction.

024 7661 2003 45 Hall Ln, Coventry CV2 2AX

Number 7: House Extensions Coventry

4.2(119)out of 5, from 119 reviewson GoogleWest Bromwich

Property extensions are designed and built by House Extensions Coventry for homeowners throughout the local region. Working on single and double-storey additions, the company manages everything from planning applications to final construction.

0121 726 6730 77 Overend St, West Bromwich B70 6EY

Number 8: Modular Home Extensions Coventry

No Google reviews yetCoventry

Eco Build Extensions constructs offsite modular home additions for clients in Coventry, assembling structures on site within days. Their work includes kitchen extensions, garage conversions, conservatory updates, and multi-storey residential builds.

01285 402882

Number 9: Extensions Coventry

No Google reviews yetCoventry

Operating across Coventry and Warwickshire, Extensions Coventry builds house extensions, loft conversions, garage conversions and kitchen additions. The team also prepares architectural plans and submits them to local councils for planning permission.

Number 10: House Extensions Coventry

No Google reviews yetShilton, Coventry

House Extensions Coventry delivers complete building services for property extensions, conversions and renovations in Shilton and the wider Warwickshire region. Trades handled in-house include groundworks, brickwork, roofing, plastering, plumbing and electrical work.

024 7661 6000 28 Charles Lakin Cl, Shilton, Coventry CV7 9LB

What extension builders charge in Coventry

In Coventry, single storey, per m² typically costs £1,700 – £2,400. Labour in West Midlands runs 5% below the UK median, which accounts for most of the difference from the same job elsewhere.

How to choose between them

  • Check the registration yourself. Trade body memberships are public, and each body's own register confirms them in a minute.
  • Get three quotes on the same specification. Written down, split into labour, materials and anything structural. Most people compare a total against a total and end up choosing between two different jobs.
  • Ask what is not included. Making good, waste removal, scaffolding and VAT are the four that turn a cheap quote into an average one.
  • Never pay a large deposit up front. Materials in advance is normal. Half the total before anyone turns up is not.

How this list is ordered

These are the firms from Google's results for "house extensions coventry". They are ranked on Google rating, online presence and other factors.

Work out the budget first

The figures above are Coventry ranges. These explain what drives them, so you can read a quote properly.

Extension builders in Coventry: common questions

How far can I extend without planning permission?

Under permitted development, three metres for a terrace or semi and four for a detached, doubled to six and eight under the prior approval process. Height, materials and how much garden you cover all carry separate limits, and none of it applies in a conservation area.

Do I need a party wall agreement?

If you are excavating within three metres of a neighbour's foundations or building on the boundary, yes. You must serve notice two months before work starts. Skipping it is the most common reason extension projects stall.