House Extensions · SW19 Wimbledon
Merton controls the Wimbledon Village and Common conservation areas, where the large villas are tightly protected; the lower streets are a strong extension market.
If your property sits elsewhere in the borough, the borough-wide page for house extensions in Merton covers the same service across every ward.
House extensions in Wimbledon are dominated by single-storey rear and side-return additions on SW19's large victorian and edwardian villas around wimbledon, with double-storey and wrap-around schemes where the plot allows. Merton Council weighs depth, height and neighbour daylight; many extensions across Wimbledon, Wimbledon Village, South Wimbledon, Colliers Wood are Permitted Development, which we confirm with a Lawful Development Certificate before you build.
The whole spectrum — rear extensions, side returns, wraparounds, double-storey, basement digs. Planning-led design with detailed technical phase, ideal for large victorian and edwardian villas around wimbledon typical of Wimbledon.
Across Wimbledon, Wimbledon Village, South Wimbledon, Colliers Wood in SW19, the dominant property is large victorian and edwardian villas around wimbledon village and the common, with terraces and inter-war semis toward colliers wood and south wimbledon. That stock shapes what house extension drawings looks like here: the right approach for a period terrace differs from a mansion-block flat or a new-build, and Merton Council judges each on design quality and neighbour impact. We survey the specific Wimbledon property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SW19 streetscape.
Housing stock in SW19: Large Victorian and Edwardian villas around Wimbledon Village and the Common, with terraces and inter-war semis toward Colliers Wood and South Wimbledon.
Within the district: Wimbledon, Wimbledon Village, South Wimbledon, Colliers Wood.
Streets we know in SW19: the Wimbledon Village roads (Church Road, Lingfield Road), the Wimbledon Park streets and Merton High Street. Each road has its own building line, boundary treatment and precedent that Merton Council weighs when assessing a house extension drawings scheme.
Conservation areas: Wimbledon Village, Wimbledon West Side Common, Wimbledon Park. Inside these, most external work needs full planning and a Heritage Statement.
Getting around SW19: Wimbledon on the District line, Thameslink and tram, plus Colliers Wood and South Wimbledon on the Northern line.
Regeneration: Wimbledon falls within or beside the Colliers Wood / South Wimbledon and the Wimbledon town-centre plan, which shapes local planning policy and design expectations.
Property values: around £500,000 for a flat and £1m-£2.5m for a house — a useful gauge of the build value an extension or loft adds in SW19.
Borough character: Wimbledon is heavily conservation-controlled; outer Merton (Morden, Mitcham) is permissive.
Measured existing survey, photographic record, Article 4 and conservation check specific to Wimbledon before we quote.
2–3 design options at concept stage — alternative layouts, glazing, roof forms.
Site location plan, existing and proposed plans, elevations, sections, D&AS where required.
Part L thermal, Part B fire, Part M accessibility, structural strategy.
Steel beam, foundation, lintel design. Chartered engineer sign-off.
Party Wall notices where needed; Thames Water Build Over Agreement where within 3m of a public sewer.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Strongly. The Wimbledon Village and West Side Common conservation areas, with many large villas, mean full planning with a Heritage Statement for external changes, and Merton scrutinises materials, boundaries and roofscape closely. We design to that standard for Village addresses, and to lighter Permitted Development routes on the lower streets.
Yes. The terraces and inter-war semis toward Colliers Wood and South Wimbledon suit rear, side and loft extensions, much of it within Permitted Development outside the conservation areas, confirmed with a Lawful Development Certificate. We confirm the route and draw to Merton's checklist.
Some are. The large detached villas around the Village and Wimbledon Park have the plot and structure for a basement scheme, subject to Merton's policy and a structural and hydrology assessment. We draw the scheme and coordinate the engineer's calculations.
Values range widely — from around £1m near Colliers Wood to £2.5m in the Village — so on the family terraces and semis a side-return or loft adds floor area worth well above the build and drawing cost.
With Wimbledon property at around £500,000 for a flat and £1m-£2.5m for a house, the professional drawing fee is a small fraction of the value the work adds to SW19's large victorian and edwardian villas around wimbledon. Merton Council charges its own statutory application fee on top (currently £548 for a householder planning application, £610 for a full application). We quote the drawings as one fixed price and the free site survey covers every SW19 address.
For a SW19 project across Wimbledon, Wimbledon Village, South Wimbledon, Colliers Wood, expect roughly 3–4 weeks from instruction to submission: week 1 the measured survey, weeks 2–3 the drawings and your revisions, then validation and the statutory determination by Merton Council (8 weeks for a householder application). We carry the Wimbledon application through every officer query to the decision.
Wimbledon (SW19) sits primarily in Merton, so applications are decided by Merton Council. Conservation areas within SW19 include Wimbledon Village, Wimbledon West Side Common, Wimbledon Park, where full planning and a Heritage Statement are required. We confirm the planning route for your exact address before quoting.
Almost always. Any structural work behind house extension drawings in Wimbledon — new openings, steel beams, loft floors, foundations — needs Building Regulations approval covering structure (Part A), fire escape (Part B) and insulation (Part L), submitted to Merton Council Building Control or an approved inspector. On SW19's typically terraced and semi-detached stock, a Party Wall notice to adjoining neighbours is normally required before the steelwork. We coordinate both as part of the Complete package.
In value terms, yes. With Wimbledon (SW19) property at around £500, 000 for a flat and £1m-£2.5m for a house, a well-designed extension or loft typically returns more than it costs in added floor area and sale value. The bigger risk is an unapproved or non-compliant scheme — which is why council-ready drawings and a clean Building Control sign-off matter on SW19 homes.
If your site sits close to the edge of the borough, it is worth checking the authority next door. Browse everything we do in SW16, SW17 and SW20.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SW19 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. SW19 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | Wimbledon / Colliers Wood is split at SW19. Either Merton Council or Wandsworth Council can determine a house extension here, so the SW19 address is checked against both policies maps first. |
| SW19 | Wimbledon | Victorian villas, Edwardian terraces | Wimbledon sits inside SW19; house extension proposals here are determined by Merton Council. |
| SW19 | Wimbledon Village | Georgian and Victorian villas | Wimbledon Village sits inside SW19; house extension proposals here are determined by Merton Council. |
| SW19 | Colliers Wood | Edwardian terraces, post-war flats | Colliers Wood sits inside SW19; house extension proposals here are determined by Merton Council. |
| SW19 | South Wimbledon | Edwardian terraces | South Wimbledon sits inside SW19; house extension proposals here are determined by Merton Council. |
| SW20 | Raynes Park | Victorian villas, Edwardian terraces | Adjoining district to SW19, also inside Merton for house extension purposes. |
| SM4 | Morden | 1930s semi-detached, post-war flats | Adjoining district to SW19, also inside Merton for house extension purposes. |
| CR4 | Mitcham | 1930s semi-detached, post-war estates | Adjoining district to SW19, also inside Merton for house extension purposes. |
| SW11 | Battersea / Clapham Junction | Victorian terraces, mansion blocks | Adjoining district to SW19, also inside Wandsworth for house extension purposes. |
| SW12 | Balham | Victorian and Edwardian terraces | Adjoining district to SW19, also inside Wandsworth for house extension purposes. |
| SW15 | Putney / Roehampton | Edwardian terraces, Victorian villas, mansion blocks | Adjoining district to SW19, also inside Wandsworth for house extension purposes. |
| SW17 | Tooting / Earlsfield | Edwardian terraces | Adjoining district to SW19, also inside Wandsworth for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few SW19 streets, and each one changes what a house extension can achieve at that address.
Conservation areas covering SW19 (Wimbledon / Colliers Wood): Merton Council runs 28, and Wimbledon Village, John Innes, Mitcham Cricket Green are the ones SW19 (Wimbledon / Colliers Wood) owners meet most. A house extension inside a SW19 (Wimbledon / Colliers Wood) conservation area loses permitted development, so the SW19 (Wimbledon / Colliers Wood) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Wimbledon Common a house extension is judged on the street elevation first.
Article 4 and your SW19 (Wimbledon / Colliers Wood) house extension: Merton Council has made no borough-wide direction, so permitted development for a house extension in SW19 (Wimbledon / Colliers Wood) generally survives outside SW19 (Wimbledon / Colliers Wood) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SW19 owner records that a house extension was lawful.
The building fabric around SW19 (Wimbledon / Colliers Wood): Victorian villas in Wimbledon; Edwardian terraces in Tooting and Colliers Wood; 1930s semi-detached in Morden and Raynes Park; post-war flats in Mitcham. Wimbledon is heavily conservation-controlled; outer Merton (Morden, Mitcham) is permissive. A house extension in SW19 (Wimbledon / Colliers Wood) is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Merton Council.
Conservation areas covering SW19 (Wimbledon / Colliers Wood): Wandsworth Council runs 45, and Wandsworth Common, Clapham Common West, Tonsley are the ones SW19 (Wimbledon / Colliers Wood) owners meet most. A house extension inside a SW19 (Wimbledon / Colliers Wood) conservation area loses permitted development, so the SW19 (Wimbledon / Colliers Wood) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Clapham Common West a house extension is judged on the street elevation first.
Article 4 and your SW19 (Wimbledon / Colliers Wood) house extension: Article 4 for HMO conversions covering the whole borough. At a SW19 address that matters twice over, because Wandsworth Council applies the direction unevenly across SW19 (Wimbledon / Colliers Wood) — we read the SW19 (Wimbledon / Colliers Wood) policies map for the exact SW19 address before quoting house extensions.
The building fabric around SW19 (Wimbledon / Colliers Wood): Extensive Victorian terraced streets — the classic London side-return extension opportunity; Edwardian villas around the commons; 1930s semi-detached in Southfields. Family-oriented, high side-return extension and loft conversion rates; planning department experienced with Victorian terrace modifications. A house extension in SW19 (Wimbledon / Colliers Wood) is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Wandsworth Council.
Sources for this SW19 house extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.
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