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Design and build · London

Builders in
Merton

Extensions, loft conversions, kitchens and garage conversions across Merton, Morden and Lower Morden, from our base in New Haw about 13 miles away.

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Putney Listed External Renovation, Putney, London
Our workExternal renovation, Putney, London
  • 13 miles

    from our base in New Haw

  • Merton

    Borough Council decides planning

  • Conservation areas

    Upper Morden, John Innes: Merton Park, John Innes: Wilton Crescent and others

  • 4 miles

    Putney Listed External Renovation

Building in Merton

What to know before you build

The houses here

This page covers the London Borough of Merton beyond Wimbledon, which has its own page: Raynes Park in SW20, Morden in SM4 and Mitcham in CR4. Morden stayed largely rural until the Underground arrived, then grew around the station between the wars, and the council's character study notes a dominance of inter-war and 1940s and 1950s housing there. St Helier, the estate the London County Council built between 1928 and 1936, straddles the boundary, and its part north of Green Lane and Bishopsford Road is in Merton. Mitcham is mostly suburban, with historic fragments that include pockets of Victorian terraces. South of the railway at Raynes Park most homes date from the 1930s, and twelve terraced roads there are known locally as the Apostles.

  • Inter-war and 1950s houses in Morden
  • St Helier estate homes
  • Victorian terraces in Mitcham
  • 1930s houses in Raynes Park

What suits them

On Morden's inter-war houses, a hip-to-gable or rear dormer loft conversion and a full-width rear extension are the usual ways to gain space, and where a house has an attached garage, converting it is another option. Victorian terraces in Mitcham may suit a side-return extension. Under Policy D12.11 of the Local Plan, a basement beneath an existing home is limited to one storey and needs a Basement Impact Assessment. A kitchen refit inside the existing walls is usually internal work, though removing a load-bearing wall brings in building regulations approval.

Planning in Merton

Applications go to the London Borough of Merton, which judges householder design under Policy D12.4 of its Local Plan, adopted in November 2024, alongside the Borough Character Study SPD (2021) and conservation area appraisals. Conservation areas here include Upper Morden, The Canons, Wandle Valley, Cricket Green in Mitcham and the John Innes areas at Merton Park and Wilton Crescent, and the character study notes a high incidence of them north of the railway at Raynes Park. The two John Innes areas have Article 4 directions, from 1986 and July 2007, that between them cover extensions, porches, hardstandings, boundary enclosures, window and door changes, roof alterations and painting. Metropolitan Open Land covers 26% of the borough, including Cannon Hill, Morden Park and Mitcham Common. Every house's planning route is checked before design.

Merton planning applications

How we work

The same team designs and builds your project, taking care of the planning application and building regulations on the way. A free, itemised Cost Proposal comes before anything else. Going ahead means a 10% deposit three weeks before the start date; from then on, billing is weekly, for completed work that you have approved.

Merton FAQs

Questions we get asked here

Straight answers on planning and building in Merton.

Yes, in the John Innes conservation areas at Merton Park and Wilton Crescent. A 1986 direction for Merton Park covers extensions, porches, hardstandings and boundary enclosures, and a July 2007 direction covers street-facing extensions, window and door changes, porches, roof alterations and painting. Which of these reach a particular house is checked before design.

Free Cost Proposal

Planning work on your Merton home?

Tell us about the project. We'll arrange a free site visit, then send a clear, itemised Cost Proposal.

Step 1 of 2 · About your project

A rough idea is fine. It helps us plan the right scope with you.

So we can check the project is in our service area.

Takes 30 seconds · No obligation · Free proposal within 24 hours

Prefer to talk? Call 01932 950158
  • 10% deposit, due three weeks before the start date
  • Weekly billing for completed, signed-off work
  • One team from first drawings to completion
Rather talk it through? 01932 950158
“Grand Innovations Surrey did an outstanding job on our kitchen extension. This was a big project involving structural steelwork and a full redesign of our layout, and the team handled everything with real expertise. The quality of finish is superb, and the builders were friendly, tidy, and very considerate of our family routine. The result is better than we imagined, and we feel like we're living in a new home.”
Angie Elston · Kitchen & structural steelwork · via Trustpilot
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