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Extension builders in Wimbledon

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

Single storey, per m²
£2,200 – £3,000shell to finished
Typical single storey
£48,500 – £66,500around 20 m²
Double storey
£66,500 – £109,000around 30 m² over two floors
Wimbledon vs UK
+21%well above the UK median

Number 1: Paytearchitects London

5.0(41)out of 5, from 41 reviewson GoogleLondon

Paytearchitects London handles loft conversions and home extensions across London. The practice designs structural additions, incorporating features such as mezzanines, skylights, and dormers while managing building regulations and planning permissions.

020 3984 8501 10 Shepherds Bush Rd, London W6 7PJ

Number 2: About Shape Architecture Wimbledon

5.0(25)out of 5, from 25 reviewson GoogleLondon

Shape Architecture undertakes residential extension and building design projects across Wimbledon and South West London. The practice works on projects of various sizes, creating plans for house extensions and property modifications.

020 3770 6360 chester House, 81-83 Fulham High St, London SW6 3JA

Number 3: Alstruct Ltd

5.0(9)out of 5, from 9 reviewson GoogleLondon

Alstruct Ltd provides house extensions, loft conversions and basement conversions for homeowners in Chiswick and West London. Its services also include groundworks, full property renovations and garden landscaping.

020 8080 8240 15B Raven Rd, London E18 1HB

Number 4: Home Tales

4.9(42)out of 5, from 42 reviewson GoogleLondon

Home Tales assists with loft conversions and property extensions across South West London areas including Wimbledon and Wandsworth. The firm handles planning guidance, permitted development advice, and dormer designs for extra room creation.

020 7043 2378 60 High St, London SW19 5EE

Number 5: Pro Ficiency Ltd

4.8(43)out of 5, from 43 reviewson GoogleLondon

Extending residential properties across London, Pro Ficiency Ltd provides design and construction services for side return, rear, and wraparound home extensions. The team coordinates architects, builders, and interior design consultations to reconfigure living areas.

020 7435 6231 31 Fortune Green Rd, London NW6 1DU

Number 6: Simply Extend

4.5(86)out of 5, from 86 reviewson GoogleWimbledon

Simply Extend builds house and kitchen extensions across East and South London, covering areas such as Croydon, Lambeth and Wandsworth. The business manages residential builds through assigned project managers, handling groundworks, brickwork construction, plastering and internal fittings.

0800 917 7571

Number 7: Plus Rooms

No Google reviews yetWimbledon

Plus Rooms provides house and kitchen extension services to homeowners in Richmond-upon-Thames and across South West London. The company manages projects from design through to construction, handling planning regulatory requirements along the way. Its team also builds loft conversions.

Number 8: Aura Homes

No Google reviews yetWimbledon

Aura Homes is an architecture practice in Wimbledon that designs house extensions, loft conversions and refurbishments, as well as whole-house remodelling projects. The studio also plans interiors with practical layouts, presents schemes as 3D visualisations and handles planning applications in the London Borough of Merton.

Number 9: House Extension and Refurbishment Project Wimbledon

No Google reviews yetWimbledon

MI Design Studios carries out house extension and full refurbishment projects across Wimbledon. The practice works on updating older residential properties, including 1950s homes, through structural reconfigurations and expanded floor plans.

Number 10: Nas Construction

No Google reviews yetWimbledon

Nas Construction builds property extensions across Wimbledon, Merton, and wider South London. Their work includes side-return and rear infill builds for residential properties, particularly converted period houses and maisonettes. Projects typically involve single-storey rear extensions featuring rooflights.

What extension builders charge in Wimbledon

In Wimbledon, single storey, per m² typically costs £2,200 – £3,000. Labour in Greater London runs 21% above 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 wimbledon". They are ranked on Google rating, online presence and other factors.

Work out the budget first

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

Extension builders in Wimbledon: 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.