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A brick rear extension opening onto a paved garden behind a London terraced house
SW20 · Raynes Park · Merton

Planning and building regulation drawings in Raynes Park (SW20)

Walk from Raynes Park station up toward Grand Drive and the houses change character block by block. Edwardian terraces cluster nearest the station. Head further out and the streets loosen into interwar semis, the kind with a side return begging for a kitchen extension and a loft that's never been touched. Worple Road and Approach Road carry that same rhythm: two-storey houses built to a shared pattern, gardens long enough for a single-storey rear addition without crowding the boundary. It's a district built in two distinct waves, and most homeowners here are working with one or the other.

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  • London Borough of Merton granted 92% of 769 householder applications
  • Drawings in about 7 days

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That split matters when you're planning work. An Edwardian terrace near the station tends to need careful matching of brickwork and roofline if the house sits within Wimbledon West, the conservation area that reaches toward Cottenham Park and governs how frontages and roof changes get treated. An interwar semi further out is usually simpler: the council is used to seeing side and rear additions on these plots, because the pattern is already well established along the road. Either way, the shared building line matters more than people expect. Merton's planning officers read a street as a whole, not house by house, and a design that breaks the rhythm of its neighbours draws more questions than one that respects it. Several roads here also carry tree preservation orders, so a mature street tree near a proposed extension is worth checking before anything gets drawn. We work through these constraints at the outset so the drawings we produce match what the council actually expects to see, rather than what looks good on paper alone.

Planning in Raynes Park: what to know before you apply

Merton assesses householder applications against the pattern already on the street, which in Raynes Park usually means either an Edwardian terrace close to the station or an interwar semi further out. Where a property sits inside Wimbledon West, changes to the front elevation, roofline or materials face closer scrutiny, and permitted development rights can be more limited. Outside the conservation area, rear extensions and loft conversions on the interwar semis frequently fall within permitted development, though the rules differ by scale and a two-storey side addition needs its own check rather than an assumption based on what the street already shows. Tree preservation orders on several streets add another check worth making early, since works near a protected tree can affect what's achievable regardless of the extension itself. We confirm a property's exact planning position, conservation status and any tree constraints before finalising a design, so the drawings submitted match what the borough is actually likely to approve.

Applications are decided by London Borough of Merton its planning pages.

Check your route

Does your Raynes Park project need planning permission?

Route check · Raynes Park (SW20)

Listed building?
Conservation area?
Likely permitted development — no planning applicationNeeds checking
  • A single-storey rear extension up to 4 m deep on a detached house, or 3 m on any other house, is Class A permitted development subject to the height and materials conditions.
  • An Article 4 direction applies here and may withdraw this freedom — the schedule must be checked before relying on it.
  • One or more constraints are unknown — we check the council's registers as part of the free appraisal.
  • Where permitted development applies, a lawful development certificate proves it for lenders and buyers.

Sources: GPDO 2015, Schedule 2, Part 1 · Planning Portal — common projects · Building Regulations 2010 — when approval is needed

This is a first-pass indication from the national rules, not planning advice for your property. Your council's registers, any Article 4 schedule and the exact dimensions decide it — the free appraisal checks all three before we recommend a route.

Confirm it with a free appraisal

Raynes Park (SW20) in numbers

What London Borough of Merton has decided, and what SW20 is built of — the two facts that shape every job here.

Householder planning decisions — London Borough of Merton

Raynes Park (SW20) applications are decided by London Borough of Merton; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1769
Granted709
Refused60
Grantedof 769 decisions · England 90%92%
Decided within 8 weeksof 499, excluding prior approvals88%

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Permitted development prior approvals — London Borough of Merton

How the larger-home-extension route has fared with London Borough of Merton, which decides SW20 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1321
Prior approval granted40
Prior approval refused179
Grantedof 219 determined18%

Source: Ministry of Housing, Communities and Local Government (PS1 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Planning appeals — London Borough of Merton

Refusals in SW20 can be appealed to the Planning Inspectorate; this is London Borough of Merton's householder appeal record.

Householder appeals determined2021–2026116
Allowed41
Allowedof 116 · England 36%35%

Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-09-22.

Conservation areas and Article 4 directions — London Borough of Merton

Register counts for London Borough of Merton. A count describes what the council has published, never a rank against another council.

Conservation areas in the register28 dated, 1968–199728

Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-09-22.

What SW20 is built of

Residential building form across Raynes Park (SW20), from 217 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side53%
Attached on one side41%
Detached6%
Median building footprint68 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate1.25
Buildings classified217

Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-09-22.

  1. Day 0Measured survey of your Raynes Park property — or your existing plans if you have them.
  2. About 7 daysDrawings issued for your approval. Free redraws until you are happy.
  3. SubmissionWe validate against London Borough of Merton’s checklist and submit on your behalf.
  4. Council: 8-week targetHouseholder applications carry an 8-week statutory target. London Borough of Merton decided 88% of 499 recent householder applications inside it.

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Neighbourhoods

Streets and neighbourhoods in SW20

FAQ

Raynes Park (SW20) — FAQs

Does my house in Raynes Park need planning permission for a rear extension?+
It depends on where the house sits and how big the extension is. Many of the interwar semis toward West Wimbledon and Cottenham Park can add a single or two-storey rear extension under permitted development, since that pattern is already common along the road. Houses within Wimbledon West face tighter controls on rooflines and frontages, and some works there need full planning permission even where a semi elsewhere wouldn't. We check the specific address and its planning history before assuming either way.
Will a loft conversion look out of place on my street?+
Not if it follows the roofline the street already has. Raynes Park's interwar semis share a consistent roofline that Merton's officers read street by street, so a design that matches what's already on neighbouring houses tends to move through more smoothly than one that stands out. Near the station, where Edwardian terraces predominate, roof changes get closer attention, particularly for houses within the Wimbledon West conservation area.
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