House Extensions · SW17 Tooting
Wandsworth controls SW17; Tooting's terraced streets are one of south London's busiest side-return and loft markets.
Working across the whole borough rather than just this area? See house extensions in Wandsworth.
House extensions in Tooting are dominated by single-storey rear and side-return additions on SW17's victorian and edwardian bay-fronted terraces, with the, with double-storey and wrap-around schemes where the plot allows. Wandsworth Council weighs depth, height and neighbour daylight; many extensions across Tooting, Tooting Bec, Tooting Broadway, Earlsfield 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 victorian and edwardian bay-fronted terraces, with the typical of Tooting.
Across Tooting, Tooting Bec, Tooting Broadway, Earlsfield in SW17, the dominant property is victorian and edwardian bay-fronted terraces, with the heaver-built streets and larger houses around tooting and earlsfield. 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 Wandsworth Council judges each on design quality and neighbour impact. We survey the specific Tooting property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SW17 streetscape.
Housing stock in SW17: Victorian and Edwardian bay-fronted terraces, with the Heaver-built streets and larger houses around Tooting and Earlsfield.
Within the district: Tooting, Tooting Bec, Tooting Broadway, Earlsfield.
Streets we know in SW17: the Heaver-built Tooting Bec roads, Mitcham Road, Garratt Lane and the Earlsfield terraces. Each road has its own building line, boundary treatment and precedent that Wandsworth Council weighs when assessing a house extension drawings scheme.
Conservation areas: Tooting Bec / Heaver Estate fringe, Magdalen Park (Earlsfield). Inside these, most external work needs full planning and a Heritage Statement.
Getting around SW17: Tooting Bec and Tooting Broadway on the Northern line, plus Earlsfield and Tooting rail.
Regeneration: Tooting falls within or beside the Tooting town centre, which shapes local planning policy and design expectations.
Property values: around £450,000 for a flat and £750,000-£1.1m for a house — a useful gauge of the build value an extension or loft adds in SW17.
Borough character: Family-oriented, high side-return extension and loft conversion rates; planning department experienced with Victorian terrace modifications.
Measured existing survey, photographic record, Article 4 and conservation check specific to Tooting 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.
Because SW17 is wall-to-wall bay-fronted Victorian and Edwardian terraces around Tooting Bec and Earlsfield — the archetypal side-return and loft market as families upsize in place rather than move. We've drawn hundreds of these schemes to Wandsworth's standards, from side-return kitchens to L-shaped rear dormers.
Usually yes — the L-shaped rear dormer over the back addition is the standard Permitted Development loft on SW17's terraces, confirmed with a Lawful Development Certificate, provided you're not in a conservation pocket. We confirm the constraints for your road and draw it for Building Control.
Yes. The narrow side passage on a Tooting terrace is ideal for a side-return infill that widens the kitchen-diner, usually within Permitted Development depth limits. We design it with rooflights and bi-folds where they suit, and produce the planning and Building Regulations drawings together.
With SW17 houses around £750,000-£1.1m and strong Northern line and rail links, a side-return or loft adds floor area worth well above the build and drawing cost. Tooting's popularity keeps demand high, so a properly drawn, council-ready scheme protects both approval and resale value.
With Tooting property at around £450,000 for a flat and £750,000-£1.1m for a house, the professional drawing fee is a small fraction of the value the work adds to SW17's victorian and edwardian bay-fronted terraces, with the. Wandsworth 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 SW17 address.
For a SW17 project across Tooting, Tooting Bec, Tooting Broadway, Earlsfield, 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 Wandsworth Council (8 weeks for a householder application). We carry the Tooting application through every officer query to the decision.
Tooting (SW17) sits primarily in Wandsworth, so applications are decided by Wandsworth Council. Conservation areas within SW17 include Tooting Bec / Heaver Estate fringe, Magdalen Park (Earlsfield), 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 Tooting — 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 Wandsworth Council Building Control or an approved inspector. On SW17'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. 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 SW17 homes.
Working across a borough boundary, or unsure which council will decide your application? Every service we offer is listed for SW4, SW11, SW12, SW15, SW16, SW18 and SW19.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Every SW17 postcode district we draw in, the stock that dominates it and the authority that validates a house extension there. SW17 fees below are the statutory England rates for 2026, not house extension estimates.
| Postcode | Area | Dominant stock | What it means for a house extension |
|---|---|---|---|
| SW17 | Tooting / Earlsfield | Edwardian terraces | SW17 straddles a boundary: Tooting / Earlsfield addresses fall to Wandsworth Council or Merton Council, so confirm which authority validates the house extension before submitting SW17 drawings. |
| SW17 | Tooting | Edwardian terraces | Tooting sits inside SW17; house extension proposals here are determined by Wandsworth Council. |
| SW17 | Wandsworth Common | Victorian villas and terraces | Wandsworth Common sits inside SW17; house extension proposals here are determined by Wandsworth Council. |
| SW11 | Battersea / Clapham Junction | Victorian terraces, mansion blocks | Adjoining district to SW17, also inside Wandsworth for house extension purposes. |
| SW12 | Balham | Victorian and Edwardian terraces | Adjoining district to SW17, also inside Wandsworth for house extension purposes. |
| SW15 | Putney / Roehampton | Edwardian terraces, Victorian villas, mansion blocks | Adjoining district to SW17, also inside Wandsworth for house extension purposes. |
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | Adjoining district to SW17, also inside Merton for house extension purposes. |
| SW20 | Raynes Park | Victorian villas, Edwardian terraces | Adjoining district to SW17, also inside Merton for house extension purposes. |
| SM4 | Morden | 1930s semi-detached, post-war flats | Adjoining district to SW17, also inside Merton for house extension purposes. |
| CR4 | Mitcham | 1930s semi-detached, post-war estates | Adjoining district to SW17, also inside Merton for house extension purposes. |
Roof pitch, wall build-up and plot depth change every few SW17 streets, and each one changes what a house extension can achieve at that address.
How designation changes a SW17 (Tooting / Earlsfield) house extension: Wandsworth Council maintains 45 conservation areas, including Nightingale Triangle, Wandsworth Common, Clapham Common West. Inside any of them a SW17 (Tooting / Earlsfield) house extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Tonsley sets the tone for SW17 (Tooting / Earlsfield) casework.
What Article 4 removes near SW17 (Tooting / Earlsfield): Article 4 for HMO conversions covering the whole borough. Before pricing a house extension we check whether the SW17 address is inside the mapped area, because Wandsworth Council draws the SW17 (Tooting / Earlsfield) boundary street by street rather than across the whole of SW17 (Tooting / Earlsfield).
What SW17 (Tooting / Earlsfield) is built from: 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. That mix decides the house extension route in SW17 (Tooting / Earlsfield) more than the postcode does, and it is what a Wandsworth Council case officer reads first. A householder application costs £548 paid to Wandsworth Council direct, with 8 weeks to a decision once validated.
How designation changes a SW17 (Tooting / Earlsfield) house extension: Merton Council maintains 28 conservation areas, including Wimbledon Common, Wimbledon Village, John Innes. Inside any of them a SW17 (Tooting / Earlsfield) house extension cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Wimbledon Common sets the tone for SW17 (Tooting / Earlsfield) casework.
No blanket Article 4 over SW17 (Tooting / Earlsfield): Merton Council has not withdrawn permitted development across SW17 (Tooting / Earlsfield), so a house extension outside a SW17 (Tooting / Earlsfield) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a SW17 owner wants on file.
What SW17 (Tooting / Earlsfield) is built from: 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. That mix decides the house extension route in SW17 (Tooting / Earlsfield) more than the postcode does, and it is what a Merton Council case officer reads first. A householder application costs £548 paid to Merton Council direct, with 8 weeks to a decision once validated.
Sources for this SW17 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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