Add flexible living space with Garden Annexes in New Malden, designed for real day-to-day comfort. We build self-contained annexes with insulation, electrics, plumbing, a kitchenette, bathroom and bedroom. Ideal for guests, older relatives, or a quiet home office that feels like a proper home.
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A well-designed garden annexe can transform how you use your property in KT3, without sacrificing your main house layout. Whether you’re near New Malden High Street or closer to Beverley Park, we create self-contained spaces that work for everyday living. Expect a warm, quiet build with proper insulation, electrics and plumbing. From kitchenette to bathroom and bedroom, everything is planned to be practical and comfortable.
New Malden’s mix of 1930s semis, Edwardian houses and modern apartments often comes with long gardens and side access that suit annex builds. We regularly work across the garden annexes New Malden area, including Raynes Park, Motspur Park and Worcester Park. Each property has its own constraints—levels, boundaries, existing patios, and neighbouring sightlines—so we tailor the footprint and finishes accordingly. The result is an annexe that looks intentional, not bolted on.
We start with a site visit, then produce a clear specification covering structure, insulation, electrics, plumbing, and internal layout. You’ll get planning support and straightforward guidance on what’s likely to be permitted, plus a build schedule you can rely on. Our team keeps the site tidy, manages deliveries, and coordinates trades so you’re not chasing contractors. Homeowners choose us for consistent workmanship, transparent communication, and a finish that lasts.
Across the Royal Borough of Kingston upon Thames, access and parking can be tight on residential streets, so we plan deliveries and waste removal carefully. Many New Malden plots have mature planting and established patios, and we work around roots, drainage routes and boundary constraints. We also consider neighbour proximity and overlooking, especially on 1930s semi-detached plots. Where needed, we liaise with the council process and provide drawings and documentation to support applications.
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Costs vary with size, specification and services, but most clients in KT3 budget roughly £55,000–£120,000+. A compact, well-finished annexe with a kitchenette and shower room sits at the lower end, while larger footprints, premium glazing, underfloor heating, and higher-end kitchens push budgets up. Groundworks, drainage connections and access constraints can also affect the final figure. We provide a detailed, itemised estimate after a site survey.
Typical build times are around 8–14 weeks once designs and specifications are agreed, with larger or more complex annexes taking longer. Timescales depend on groundworks, utility runs, weather, and whether we’re fitting a full bathroom and kitchen with bespoke joinery. If planning approval is required, add time for submission and determination. We set out a clear programme and keep you updated at each stage.
Some garden buildings can fall under permitted development, but a self-contained annexe can trigger extra rules, especially if it’s intended for independent living. Requirements can depend on height, location, overall footprint, and how it’s used. We check constraints such as conservation considerations, boundary distances and existing extensions, then advise on the safest route. If an application is needed, we provide planning support and the documents to submit.
We back our workmanship with a 10-year warranty covering the build structure and installation quality, giving you confidence long after handover. This includes key elements such as framing, insulation installation, weatherproofing and internal fit-out workmanship. Manufacturer warranties apply separately to items like windows, doors, electrics components and appliances. We also provide completion documentation and clear aftercare guidance for ongoing maintenance.
You can choose from contemporary or traditional exteriors, including timber cladding, composite boards, brick slips and modern render. Inside, popular options include LVT or engineered wood flooring, acoustic insulation upgrades, and compact kitchens with integrated appliances. We can fit shower rooms or full bathrooms depending on space and drainage routes. We’ll help you balance looks, durability and budget, then finalise a layout that suits how you’ll live in the annexe.
Get your free, no-obligation quote today.