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Bathroom Renovation Merton

Luxury bathroom and wet-room refurbishment in Merton. Trusted, professional, 30+ years' hands-on experience.

GS Renovation refurbishes bathrooms throughout Merton, from compact family bathrooms in Wimbledon terraces to en-suites in larger homes near Morden and Mitcham. With more than 30 years of experience in SW19, SW20, CR4 and SM4, we handle the waterproofing, drainage, tiling and heating so period-home bathrooms are dry, warm and built to last.

A bathroom fitted by GS Renovation with a panelled bath, wall-hung WC and a floating double vanity
Concealed cistern behind the tiled wall, wall-hung pan and a floating vanity, all set out to the tile grid.

Waterproofing and wet rooms in Merton

Proper tanking is the part of a bathroom you never see and cannot skip. In Merton's solid-wall terraces we fully waterproof the walls and floor before a single tile goes on, which matters most in wet rooms and walk-in showers where water is not contained by a tray. Done correctly, tanking protects the joists and the ceiling of the room below.

Drainage and ventilation take extra thought in a Victorian or Edwardian house, where the bathroom often sits in the rear closet wing with limited fall to the soil pipe. We set the pipework to run cleanly, fit extraction that clears moisture properly, and finish with tiling and underfloor heating so the room stays warm on a cold Wimbledon morning.

Space-saving layouts for Merton period homes

Bathrooms in Merton terraces are frequently tight, carved out of a closet wing or a small return bedroom over the years. We plan layouts that make every centimetre count, using walk-in showers, wall-hung units and considered positioning of the basin and WC so the room feels larger than its footprint suggests without cramming fittings together.

For growing families in SW19 and SW20, adding an en-suite to the main bedroom is a popular way to ease the morning rush. We assess where the drainage and water supply can reach, then build a compact, fully tanked en-suite that suits the proportions of the period house rather than fighting against them.

  • Floor strengthening before large-format tiles or stone
  • Concealed cisterns, frames and wall-hung sanitaryware
  • Freestanding and built-in bath installation
  • Downstairs cloakroom and WC installation
  • Soil pipe and waste re-routing within the floor build-up
Service areaMerton · SW19, SW20, CR4 and SM4
Local authorityMerton Council
Part ofSouth West London (Outer London)
Typical homesVictorian villas, Edwardian terraces and substantial suburban homes
Also covered nearbyWandsworth, Lambeth, Croydon, Sutton and Kingston upon Thames

The GS Renovation Difference in Merton

Merton homeowners choose GS Renovation because a lasting bathroom depends on the waterproofing and drainage beneath the tiles, not just the finish. We tank properly, sort ventilation in awkward period layouts, and complete the tiling, heating and plumbing in one coordinated job, with 30+ years across SW19, SW20, CR4 and SM4.

  • Waste cleared as we go, not left piled in the garden
  • The shortest sensible downtime where it is the only bathroom
  • One point of contact on the phone, not a call centre
  • Floors checked and stiffened before large-format tiles go down
  • Dust screens and floor protection in occupied homes
  • Itemised pricing, so you can see what every stage costs
30+ YearsFounder's experience
Fully Insured5 year guarantee
4.9 / 531 MyBuilder reviews
Building ControlCompliant
Free QuotesNo obligation
Reviews

Rated 4.9 / 5 by our clients

★★★★★ 4.9 average from 31 verified reviews on MyBuilder

★★★★★
Really great job done in our bathroom to replace the shower head in the bathtub, and install a shower screen and caddy. We are very happy with the…
anja33030Enfield · via MyBuilder
★★★★★
George was very friendly and helpful from start to finish. He worked really hard to ensure our kitchen was installed to a high standard and was…
sophie35636Wanstead, London · via MyBuilder
★★★★★
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
kath833Wood Green, London · via MyBuilder
Read all 31 reviews

FAQ

Frequently Asked Questions about Bathroom Renovation Merton

How much should bathroom renovation in Merton cost?

Expect the figure to track scope rather than postcode. The bathroom renovation elements that move a quotation are span, access and condition, all of which we check at the SW19 property before writing anything down. GS Renovation then itemises labour, materials and the Merton Council element for your Merton home. Comparing that against another Merton builder is straightforward because every line is visible. Ring 07472 424 226 and we will arrange a free survey at the SW19 property in Merton. As a rough guide, bathroom renovation in London ranges from roughly £6,000 to £20,000 or more (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.

What electrical rules apply in a Merton bathroom?

Fittings are selected by zone, according to how close they are to water. In your Merton bathroom the area in and immediately around the bath or shower takes the most heavily protected fittings, and requirements relax with distance. Socket positions are restricted, supplementary bonding may be required, and the whole installation is protected by a residual current device. The work is notifiable and is certified on completion.

Why is water pressure poor in a Merton bathroom?

Usually the type of system rather than the pipework. Many Merton houses still have a gravity fed cylinder with a tank in the loft, and the pressure at a shower depends on the height of that tank above it. A pump, an unvented cylinder or a combination boiler each solve it differently. The right answer depends on the incoming main and the demand, and it is established before the bathroom is designed.

Will the floor take a large bath in a Merton house?

It is checked rather than assumed, particularly for stone or a filled bath. A freestanding bath in your Merton house concentrates a considerable weight over a small area of a timber floor that was designed for ordinary domestic loading. Where the weight is significant the joists are checked and strengthened, or the bath is positioned over a wall below. Discovering the problem after installation is expensive.

What goes behind the tiles in a Merton bathroom?

A board suited to wet conditions rather than ordinary plasterboard. In a Merton bathroom the wall behind a shower is tiled onto a tile backer or a moisture resistant board, bedded and sealed so water cannot reach the structure behind. Standard plasterboard softens once water gets past the grout, and the tiles come away with it. The substrate is the part nobody sees and the part that fails.

Can a Merton bathroom be refitted without moving anything?

Yes, and it is considerably quicker and cheaper when the layout already works. Keeping the bath, basin and WC in their existing positions in a Merton bathroom means the drainage and most of the pipework stay put, and the job becomes strip out, waterproofing, tiling and fitting. Moving the WC in particular is what adds cost, because its waste needs fall and a short route to the stack.

Every Service, One Team

More GS Renovation Services in Merton

The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Merton. Explore what else we do locally:

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Free, no-obligation quote for bathroom renovation in Merton. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.

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