Wimbledon is a neighbourhood where space is genuinely at a premium, and the desire to extend rather than move is one that we hear from homeowners across SW19 and SW20 on an almost daily basis. A house extension in Wimbledon — designed and built properly — creates meaningful additional space, transforms how you use your home, and adds real, lasting value to one of London’s most sought-after residential postcodes.
At Braha Ltd, we’ve delivered house extensions across Wimbledon for over 20 years. We know the local housing stock well — the Edwardian semis and detached properties near the Common, the Victorian terraces around South Wimbledon station, the interwar houses of Raynes Park, and the more modern homes towards New Malden. And we know Merton Borough Council’s planning framework inside out, which is increasingly important as competition for permitted development space intensifies.
Types of House Extension We Build in Wimbledon
Single-storey rear extension — The most popular extension type in Wimbledon, creating an enlarged ground-floor footprint for a kitchen-diner, family room, or utility space. Particularly transformative for Victorian and Edwardian terraces where the existing rear room is disconnected from the garden.
Side return extension — Filling in the narrow side passage that runs alongside many Wimbledon terraces, creating additional ground-floor width for a larger kitchen or open-plan living space. Often combined with a rear extension.
Wraparound extension — The most comprehensive ground-floor option, combining rear and side return extensions to create a genuinely open, L-shaped or U-shaped living space. One of the most popular choices among Wimbledon family buyers.
Double-storey extension — Adding a second storey to a ground-floor extension, creating additional bedroom or bathroom space above. Maximises the return on the structural investment of the ground-floor works.
Planning Permission in Wimbledon — Merton Borough Council
House extensions in Wimbledon fall under the planning jurisdiction of Merton Borough Council. Under current Permitted Development rules, single-storey rear extensions of up to 3 metres (terraced or semi-detached) or 4 metres (detached) can often proceed without a full planning application, though you’ll need to submit a Prior Approval notification. Larger or more complex extensions require a full planning application.
Properties near Wimbledon Village may fall within or adjacent to a conservation area, which restricts certain types of extension. We assess your property’s planning position during the initial consultation and manage the full submission process on your behalf.
Every house extension, regardless of planning status, requires building regulations approval. We manage this process as standard.
Contact us for a free consultation and quote for your Wimbledon house extension.
For a complete transformation, we can also combine your extension with a loft conversion or a full house refurbishment as part of a single managed project.
FAQs — House Extension Wimbledon
Do I need planning permission for a house extension in Wimbledon?
This depends on the size and type of extension. Many single-storey rear extensions in Wimbledon qualify for Permitted Development, meaning no full planning application is required — though a Prior Approval notification to Merton Borough Council is still needed. Side return, wraparound, and double-storey extensions typically need full planning permission. Properties near Wimbledon Village conservation area have more restricted permitted development rights. We advise on your specific situation at the initial consultation.
How long does a house extension take in Wimbledon?
The building phase of a standard single-storey rear extension in Wimbledon takes 10–14 weeks. Larger or more complex extensions take 14–20 weeks. The design and planning phase — including any required Merton Council approvals — typically adds 8–16 weeks before building work begins. We provide a full project timeline before you commit.
Will a house extension add value to my Wimbledon property?
A well-built extension consistently generates a strong return on investment in Wimbledon's property market. Creating open-plan ground-floor living space is one of the most sought-after features among Wimbledon's family buyer demographic, and an extension that achieves this effectively can add significantly more than its build cost to your property's value. The exact uplift depends on your property's starting position and the quality of the finished extension.
Can you combine an extension with a loft conversion or kitchen refit?
Yes — and there are significant advantages to doing so. Carrying out a ground-floor extension and a loft conversion simultaneously, or combining an extension with a full kitchen refit, reduces overall disruption, allows structural and services work to be coordinated more efficiently, and typically results in a lower combined cost than if the same work were carried out as separate projects. We offer combined project pricing and a single management structure throughout.
