House Refurbishment Merton

House refurbishment in Merton means renewing the whole fabric of a terrace, semi or villa without re-planning it. Houses are 58% of homes in the borough, and terraces alone are 43%. With 26% of homes built before 1919 and 37% between the wars, the work is usually a rewire, new heating, replastering, floor and joinery repairs and windows, run as one programme. We survey first, open up where the age of the house suggests hidden problems, and then price the sequence from strip out to decoration.

For Merton, published UK figures put a three-bed house refurbishment at £43,530 to £110,350, and London houses usually cost more, with a London architect allowing £1,800 to £2,200 per square metre before VAT (Checkatrade and Bradley Van Der Straeten Architects, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Merton: we renew the wiring, pipework, heating, plaster, floors and joinery of the whole house under one contract, and a registered electrician certifies the rewire.

What a Victorian or Edwardian house in Merton needs renewing

A pre-1919 house in Merton usually needs its services, plaster and joinery renewed together, because they have aged together. Merton's stock includes Victorian villas and Edwardian terraces, and 26% of homes date from before 1919. Behind the paper you may find lath and plaster ceilings, solid brick walls laid in lime, rubber or lead-sheathed cable and iron or lead pipes. We repair those walls with lime plaster where they need to breathe, and replace plasterboard only where the old lath has failed.

Floors and stairs come next. Suspended timber ground floors need clear air bricks and sound joists, and a survey often finds notched joists where earlier plumbers ran pipes through them. Sash windows can usually be overhauled with new cords, beads and draught strips rather than replaced. When you renew a window, a floor or a wall finish, Part L of the Building Regulations can ask for better insulation, so we price that in at the start rather than find it at the inspection.

Housing in Merton

Of the 87,830 homes the valuation list records in Merton, 26% were built before 1919, 37% between the wars and 36% since 1945; 42% are flats and 58% are houses. Terraced houses make up 43% of homes here, and rewiring a terrace in Merton means noisy chasing on two shared walls.

Interwar and post-war Merton houses have different weak points

An interwar house in Merton is a different refurbishment from a Victorian one, and 37% of the borough's homes were built between 1919 and 1939. These semis and terraces often have cavity walls, early plastic or rubber wiring, steel or replacement windows and pebbledash or render that has cracked. Textured ceilings and some floor tiles of that age can contain asbestos, so we have suspect materials sampled before anyone drills or scrapes them.

Post-war houses, part of the 36% of Merton homes built after 1945, tend to need less fabric repair and more renewal of tired services, kitchens, bathrooms and heating. The programme is shorter and the price follows the specification more than the surprises. Where a house has been re-let for years, we check the consumer unit, the boiler flue and the loft insulation first, because those three items decide how much of the budget goes on things you never see.

Merton conservation area rules on roofs, porches and front gardens

A refurbishment that touches the front of a Merton house can need planning permission in some conservation areas. In the John Innes Merton Park and Wilton Crescent conservation areas, four Article 4 directions bring certain changes under planning control. In John Innes, the second Article 4 (2) direction withdraws permitted development for altering a roof slope that fronts a public highway or other public space, and for a porch outside an external door that fronts one. A new roof covering on a street-facing John Innes slope needs the consent first.

Front gardens are covered too. The first John Innes Article 4 (2) direction withdraws permitted development for a hard surface in front of a house that faces a highway or public space, so paving over a front garden is not a free choice. In Mitcham Cricket Green, the council's appraisal says changes such as infilling porches, new roof coverings and removing front boundaries can erode the area's character. We keep original features where the survey allows and price repair before replacement.

Hours, skips and scaffold for a house refurbishment on a Merton street

Merton expects noisy work to stay between 8am and 6pm on weekdays and 8am to 1pm on Saturdays, with Sundays and bank holidays normally quiet. On a terrace that shares walls on both sides, we put chasing, breaking out and floor sanding inside those hours and tell the neighbours when the loud weeks are coming. Quiet work such as second fix and decoration can run to the edges of the day.

The skip is booked through a hire firm, because Merton only grants skip licences to private skip hire companies, and the licence runs for a set period, such as two weeks outside a controlled parking zone. Scaffold on the pavement for chimney, gutter or roof repairs needs a separate scaffold licence from the council, which the scaffold firm holds. We time the scaffold to the roof works and take it down as soon as the survey items are finished.

• Whole-house replumbing, including old lead and galvanised supply pipes
• Staircase repairs: treads, risers, strings, balusters and newel posts
• Panelled doors eased and rehung, skirtings and architraves pieced in to match

VOA Council Tax stock of properties, March 2025, for all 25 statistical areas in Merton. Counts rounded by the VOA.

If you are weighing up options for your Merton property, it is worth reading home renovation in Merton, our Merton area guide, builders in London for house refurbishment, snagging a house refurbishment, how we handle house refurbishment across London and Damp Causes and Fixes.

Why Choose GS Renovation in Merton

A whole-house refurbishment runs through many trades, and the cost sits in the order they work in. We survey the house, open up where needed and give you a written scope in the sequence strip out, first fix, plaster, second fix and finish. The rewire is certified by a registered electrician and gas work is done by an engineer on the Gas Safe Register. We plan it around whether you are living in the house or it stands empty, and keep the certificates together for a sale or a new tenancy.

• Provisional sums for what lies behind the plaster shown as separate lines
• Neighbours given notice before the noisy stages
• Roof, gutters and chimney stacks looked at before the top-floor plaster is priced

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254).