Measured Building Surveys · SW20 Raynes Park
Merton applies suburban householder control across SW20, with a conservation pocket around Cottenham Park; a settled family market.
This page is one district. For fees, timelines and where the council currently stands, read measured building surveys in Merton.
A measured building survey puts the property on paper exactly as it stands — every wall, opening, level and boundary — and that record is the base every design and planning drawing is built on. On the older terraces and villas through Raynes Park, West Wimbledon and Cottenham Park, walls are seldom square and rooms are seldom the size the deeds imply, so laser measurement removes the errors before Merton Council ever opens the file.
Capture by Leica Disto and BLK360 point cloud; delivery in AutoCAD and Revit; MCIAT chartered throughout.
Across Raynes Park, West Wimbledon, Cottenham Park, Motspur Park fringe in SW20, the dominant property is inter-war and edwardian semis and detached houses around raynes park and west wimbledon, with larger houses toward wimbledon common. That stock shapes what measured building survey 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 Raynes Park property, confirm the planning route — Permitted Development, a Lawful Development Certificate, or full planning — and draw a council-ready set tailored to the SW20 streetscape.
Housing stock in SW20: Edwardian and inter-war semis and detached houses through Raynes Park and West Wimbledon, running to larger properties as you approach Wimbledon Common. Borough-wide, the years 1900 to 1918 account for 14.9% of Merton's homes and the 1930s for a further 24.6%.
Within the district: Raynes Park, West Wimbledon, Cottenham Park, and the Motspur Park fringe.
Streets we know in SW20: the Cottenham Park roads, Coombe Lane, Grand Drive and the West Barnes streets. Each has its own building line, its own boundary treatment and its own precedent, and Merton weighs all three when it assesses a scheme.
Conservation areas: Cottenham Park, and the fringe of Wimbledon's West Side designation. Inside either, most external work needs a full application and a heritage statement.
Getting around SW20: Raynes Park and Motspur Park stations run into Waterloo, with Wimbledon a short hop away for the District line and the tram.
Property values: the Land Registry recorded 391 SW20 sales during 2025 at a median of £730,210. That is the honest measure of the base an extension or a loft gets added to here. Source: HM Land Registry Price Paid Data
What Merton gets through: 2,494 applications for householder work were decided by the borough across 2023-24 to 2025-26, of which 278 were refused. Raynes Park sends a steady share of that, mostly inter-war semis where the survey has to settle bay projections and floor levels before anything is designed on top of them. Contains public sector information licensed under the Open Government Licence v3.0
Borough character: the designated areas cluster around Wimbledon and thin out towards Morden and Mitcham. Across the whole borough Merton grants 88.9% of householder applications where London manages 83.0%, so it is designation, not the council's temperament, that decides how hard a scheme will be.
A chartered technologist attends the property in Raynes Park with a Leica Disto in hand and a BLK360 on a tripod. Ninety minutes covers a typical two- or three-bedroom terrace.
Drafting runs in AutoCAD or Revit, at 1:50 or at 1:100 depending on the job, inside a three-millimetre tolerance. Each room gets annotated, along with the openings, the fittings and any service run you can see.
Four elevations and cross-sections cut through the building. Merton wants them for a planning application, a party wall surveyor wants them for an award, and the engineer wants them before sizing any steel.
A full 3D point cloud comes out of the BLK360, which is what you want on SW20's Edwardian and inter-war stock, on listed buildings, and on anything whose geometry has stopped being rectilinear.
Four file types come back — DWG, RVT, PDF, IFC. Nothing downstream has to be re-traced, whether the next person to open it designs, engineers or builds; a structural engineer gets exactly the geometry the surveyor recorded.
The delivery includes an accuracy report in RICS form: three millimetres between points, five millimetres absolute across the building. Councils, insurers and the party wall surveyor all sign off against that statement.
Single planning or building-regs submission.
Planning + building regs + structural.
Listed, conservation or complex sites.
Yes. The Edwardian and inter-war stock around Cottenham Park and Grand Drive suits rear, side and two-storey extensions as well as loft conversions, and a fair share of that work stays within permitted development outside the conservation area, confirmed by a Lawful Development Certificate. We establish the route and draw to Merton's own checklist.
Often, on the wider semis and detached plots around Coombe Lane: a two-storey side or rear extension, judged against Merton's policies on side space, daylight and neighbour amenity. We design inside those limits and produce the planning and Building Regulations drawings together.
Usually yes on the semis: a hip-to-gable with a rear dormer, kept under the cubic-metre limit and evidenced with a Lawful Development Certificate. The house does need to sit outside the Cottenham Park conservation area. We test the constraints on your own road, then draw it for Building Control.
With the median SW20 sale at £730,210 last year and Raynes Park a direct run into Waterloo, a rear extension or a loft adds family space against a base that carries the build and drawing cost comfortably. This is a suburb people move to for the schools and then stay in.
Against a median SW20 sale of £730,210 in 2025, across 391 Land Registry transactions, the drawing fee is a modest fraction of what an extension adds to an Edwardian or inter-war semi. Merton Council charges its statutory application fee on top, currently £548 for a householder application. Our drawings go out at one fixed price, and every address in the district gets its site survey free. Source: HM Land Registry Price Paid Data
On an SW20 project — Raynes Park, West Wimbledon, Cottenham Park or the Motspur Park fringe — reckon on 3 to 4 weeks between instruction and submission. The survey happens in week one; weeks two and three go on drawings and your revisions; then comes validation and Merton Council's statutory determination, 8 weeks on a householder application. Merton settles 91.4% of householder cases inside that window, and we stay with the application through every officer query until it is decided.
Raynes Park sits almost wholly in Merton — 99.5% of SW20's recorded property sales are on the Merton side of the line — so Merton Council decides applications here, with a thin western edge of the district falling into Kingston upon Thames. Merton operates no borough-wide Article 4 direction over householder rights, so permitted development survives outside the designated areas. Conservation areas reaching into SW20 include Cottenham Park and the fringe of Wimbledon West Side, where a full application and a heritage statement are the route. We confirm which applies to your exact address before quoting.
Almost always. Cut a new opening in Raynes Park, drop in a steel, build a loft floor or underpin a foundation, and Building Regulations approval is required. Part A covers the structure, Part B escape in a fire, Part L the thermal elements. Either Merton's own building control team takes the submission or you appoint an approved inspector. SW20 is mostly terraces and semis, so expect to serve on the neighbours under the Party Wall Act as well, in good time before the steelwork is ordered. Both processes are coordinated within the Complete package.
In value terms, yes. HMLR price-paid records for 2025 show a median SW20 sale of £730,210 over 391 transactions, and on a base like that a well-drawn extension or loft usually returns more than it cost, in usable floor area and in eventual sale price. The larger risk is not the cost but an unapproved or non-compliant scheme, which is why drawings a council will accept, and a Building Control sign-off with nothing outstanding, matter here. Source: HM Land Registry Price Paid Data
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 SW19.
Pick a slot that suits you. No obligation and no sales pressure, just straight answers on your planning route.
Below: the SW20 roads we draw in, what is built along them, and which council validates a survey-based application at each address. The figures quoted are England's statutory application fees for 2026, and are not our survey prices.
| Postcode | Area | Dominant stock | What it means for a measured building survey |
|---|---|---|---|
| SW20 | Raynes Park | Victorian villas, Edwardian terraces | SW20 is Raynes Park, West Wimbledon and the Motspur Park fringe; Merton Council handles the survey and any application, applying the conservation-area map for that part of the borough, with a small western sliver of the district falling into Kingston upon Thames |
| SW20 | Wimbledon | Victorian villas, Edwardian terraces | SW20 is Raynes Park and West Wimbledon, not Wimbledon itself, which is SW19; survey and design proposals at an SW20 address are determined by Merton Council. |
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | Adjoining district to SW20. Surveying needs no consent here either — Merton has no say in it, and the survey is the same record whichever side of the line the property sits. |
| SM4 | Morden | 1930s semi-detached, post-war flats | Adjoining district to SW20. Surveying needs no consent here either — Merton has no say in it, and the survey is the same record whichever side of the line the property sits. |
| CR4 | Mitcham | 1930s semi-detached, post-war estates | Adjoining district to SW20. Surveying needs no consent here either — Merton has no say in it, and the survey is the same record whichever side of the line the property sits. |
Roof pitch, plot depth and the make-up of the walls change between one SW20 road and the next. Each of those bears on what can realistically be delivered at a given address. The stock itself is remarkably consistent, though: across Merton, 51.7% of the 87,810 dwellings went up between 1900 and 1939, on the VOA record at 31 March 2025.
Conservation areas covering SW20 (Raynes Park): Merton Council runs 28, and Wimbledon Village, John Innes, Mitcham Cricket Green are the ones SW20 (Raynes Park) owners meet most. A measured building survey inside a SW20 (Raynes Park) conservation area loses permitted development, so the SW20 (Raynes Park) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In John Innes a measured building survey is judged on the street elevation first.
No blanket Article 4 over SW20 (Raynes Park): Merton Council has not withdrawn permitted development across SW20 (Raynes Park), so a measured building survey outside a SW20 (Raynes Park) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a SW20 owner wants on file.
The building fabric around SW20 (Raynes Park): 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 measured building survey in SW20 (Raynes Park) 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.
Sources for this SW20 measured building survey 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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