Luxury bathroom and wet-room refurbishment in New Malden. Trusted, professional, 30+ years' hands-on experience.
GS Renovation renovates bathrooms across New Malden, where the interwar semis of KT3 often have a single family bathroom and awkward, dated layouts to work around. With 30+ years in Kingston upon Thames, we deliver fully waterproofed bathrooms, wet rooms and en-suites, handling the drainage, tiling and finish from start to finish.

A bathroom that lasts starts with what you cannot see. In New Malden's interwar homes we tank and waterproof the walls and floor properly before a single tile goes on, which matters on the timber upper floors typical of these 1930s semis. For walk-in showers and wet rooms we form the falls carefully so water drains where it should, then tile onto a fully sealed substrate.
Good drainage and ventilation finish the job. We upgrade waste runs where the original pipework is undersized and fit effective extraction to manage the moisture that older KT3 bathrooms struggle with. The result is a warm, dry room that protects the interwar structure around it rather than slowly damaging the joists and plaster over the years.
The bedrooms in a New Malden semi often have room to carve out a compact en-suite, and we plan these tight spaces around the existing soil stack and joists so the drainage runs sensibly. Wall-hung basins and toilets, walk-in showers and clever storage make the most of the footprint, turning an unused corner of a 1930s bedroom into a genuinely usable second bathroom.
Underfloor heating suits these renovations well, freeing wall space and warming the tiled floors that can feel cold in an interwar house. The wiring for a heated floor and the bathroom electrics are notifiable under the Building Regulations, so we certify them correctly. From layout to the final grout line, one KT3 team delivers a bathroom that works hard in a small space.
New Malden homeowners choose GS Renovation because we build bathrooms that stay dry and last. We tank and waterproof properly for the timber floors in KT3 semis, sort out drainage and ventilation, and certify the notifiable electrics correctly. One team handles the plumbing, tiling, underfloor heating and finish, backed by more than 30 years across Kingston upon Thames.
George was a great find. The job required re-plastering the walls before fitting acrylic panels. He also re-plumbed the shower waste under the solid…
I am very happy to recommend George after he completed the work on my 2 bathrooms. He worked very hard to make sure everything was completed and even…
My husband and I are extremely pleased with the work. The standard of the work is outstanding and Saiid has a great eye for detail and will not leave…
FAQ
Not a real one, no. We can explain on 07472 424 226 how bathroom renovation is usually approached in a New Malden home and what tends to move the cost, but the KT3 property has to be seen before GS Renovation commits anything to paper. Builders who quote blind across Kingston upon Thames are the ones who revise later. Email info@gsrenovationltd.co.uk with the address and we will arrange a time. The KT3 survey carries no obligation of any kind. 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.
Allow time for the quotation, the approvals and then the build itself. After the free survey at KT3, GS Renovation issues the bathroom renovation quotation quickly, and the Kingston Council route decides how much sits between agreement and starting on your New Malden home. The construction phase is programmed week by week. Ring 07472 424 226 and we will map it against a 1920s and 1930s suburban property. Nothing about a Kingston upon Thames start date is committed before the KT3 scope is agreed.
We tell you immediately, price the fix, and get your agreement before continuing. Problems on a bathroom renovation job usually surface when a 1920s and 1930s suburban KT3 property is opened up, and hiding them helps nobody. GS Renovation sets out the effect on the New Malden programme and on the cost in writing. Work resumes once you have decided, not before. Ring 07472 424 226 to hear how Kingston upon Thames variations are agreed. Nothing at KT3 proceeds without your written approval in New Malden.
Usually yes, and it is one of the commonest upgrades we make in New Malden. The constraints are the soil stack route and the floor structure, both checked at survey, and the electrics need Part P certification through Kingston Council.
Almost all, which is exactly why the survey matters. Bathroom renovation at a KT3 address of that age is priced on what we find rather than on a standard detail, and GS Renovation has done enough of them across New Malden and Surbiton to know where to look. The 31 public MyBuilder reviews cover the same work. Ring 07472 424 226 for recent examples. Ask on 07472 424 226 what bathroom renovation usually finds at a KT3 address of that age.
Often yes. Bedrooms in New Malden's interwar semis usually have space for a compact en-suite, and we plan the layout around the existing soil stack and floor joists so the drainage runs cleanly. With full tanking, a walk-in shower, wall-hung fittings and certified electrics, we turn an unused corner of a 1930s KT3 bedroom into a practical second bathroom.
We take those enquiries regularly. A property sitting just outside New Malden is often closer to a current Kingston upon Thames site than one at KT3, so bathroom renovation there is sometimes easier rather than harder. GS Renovation charges nothing for the survey. Call 07472 424 226 and we will check the next available slot. Building control is coordinated with Kingston Council wherever the address sits. Nothing at all is owed for the KT3 visit or the written quotation.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in New Malden. Explore what else we do locally:
Same Service, Nearby Areas
We carry out bathroom renovation across New Malden and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for bathroom renovation in New Malden. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.