Planning permission in Merton
Constraints: planning.data.gov.uk (ingested 2026-06-15) · Prices: HM Land Registry UK House Price Index, October 2025 · 183 sales in October 2025 · Open Government Licence
Planning in Merton — the detail
Merton runs from Wimbledon and its Common down through Merton Park and Colliers Wood to Mitcham and Morden, and its planning character is dominated by the Wimbledon set pieces among its 28 conservation areas — Wimbledon Village, Wimbledon West and Wimbledon North, Vineyard Hill Road, and the Wimbledon Windmill and Common fringe — together with the planned Edwardian streets of the John Innes estate at Merton Park. House prices and design scrutiny are both highest in the Wimbledon conservation areas, where roofline, materials and boundary treatments are closely controlled.
Merton's signature householder control sits in the John Innes conservation areas — Merton Park and Wilton Crescent — which carry old-style Article 4(2) directions (the Merton Park directions confirmed in 2007) removing a wide range of permitted development rights, so most extensions and external alterations there need a full planning application. The council's John Innes Design Guide sets out exactly what is expected on side and rear extensions, roofs, walls, doors and windows. A separate Article 4 direction has been used to control office-to-residential conversion.
Across the rest of the borough — the Victorian and interwar stock of Colliers Wood, South Wimbledon, Mitcham and Morden — much of the housing keeps permitted development rights, and side returns, rear extensions and lofts are common projects with a deep precedent base. The address-level check is decisive: two houses a few streets apart in Merton Park and South Wimbledon can face entirely different consent routes.
Policy detail lives in the Merton local plan and applications are submitted via the Merton planning portal.
Conservation areas in Merton
Real · planning.data.gov.ukEvery designated conservation area in Merton from the official dataset — inside one, permitted development narrows and design scrutiny rises.
- Bathgate Road
- Bertram Cottages
- Copse Hill
- Dennis Park Crescent
- Drax Avenue
- Dunmore Road
- Durham Road
- John Innes (Merton Park)
- John Innes (Wilton Crescent)
- Kenilworth Avenue
- Lambton Road
- Leopold Road
- Merton Hall Road
- Mitcham Cricket Green
- Pelham Road
- South Park Gardens
- Upper Morden
- Vineyard Hill Road
- Wandle Valley
- Westcoombe Avenue
- Wimbeldon Broadway
- Wimbledon Chase
- Wimbledon Hill Road
- Wimbledon North
- Wimbledon Village
- Wimbledon West
- Wimbledon Windmill
- Wool Road
Source: planning.data.gov.uk · Open Government Licence. Boundaries are checked at address level by the area report.
Article 4 directions in Merton
Real · planning.data.gov.ukNo Article 4 geometry for Merton appears in the national planning.data.gov.uk dataset, but the borough operates significant householder directions: the John Innes conservation areas at Merton Park and Wilton Crescent carry old-style Article 4(2) directions (the Merton Park directions confirmed in 2007) that remove a wide range of permitted development rights, so most extensions there need planning permission. A separate direction controls office-to-residential conversion. Check the council's Article 4 pages and the John Innes Design Guide for the position at a specific address.
Source: planning.data.gov.uk · Open Government Licence. Checked at address level by the area report.
What gets built in Merton
Terraces in Colliers Wood, South Wimbledon and Mitcham extend under PD; the John Innes and Wimbledon conservation areas need a full application.
Costs & planning route →Deep precedent on the Wimbledon and South Wimbledon terraces; the John Innes Article 4 areas need a full application.
Costs & planning route →Common across Wimbledon, Colliers Wood and Morden; the John Innes and Wimbledon conservation areas decide dormer form via a full application.
Costs & planning route →Permission and a structural and ground-condition case are expected, with the John Innes and Wimbledon conservation areas adding heritage scrutiny.
Costs & planning route →Workable under PD on many plots; the John Innes and Wimbledon conservation areas can remove outbuilding PD rights — verify the address.
Costs & planning route →Merton postcode by postcode
SW19 spans Wimbledon Village, Wimbledon West and Wimbledon North — the borough's most tightly controlled conservation areas — and …
Area report →SW20 covers Raynes Park and West Wimbledon, including the Copse Hill and Westcoombe Avenue conservation areas. Much of the Edwardi…
Area report →CR4 is Mitcham — the Mitcham Cricket Green conservation area, one of the oldest cricket greens in the world, anchors the historic …
Area report →SM4 is Morden — the Upper Morden conservation area and the interwar St Helier estate fringe. Much of the suburban stock keeps perm…
Area report →Merton planning, asked straight
Which parts of Merton have Article 4 directions?
Is my Wimbledon home in a conservation area?
Do I need planning permission for an extension in Merton Park?
Can I do a side return or loft in Colliers Wood or Mitcham?
How do I check constraints for a Merton address?
Related reading
The designation nobody's heard of until it refuses their extension.
Read the guide →Designated land edits the rulebook — here's the exact redline.
Read the guide →Four roof forms, four budgets — and one big conservation premium.
Read the guide →What applies at your address?
Borough-level rules only narrow it down. Enter a Merton postcode for the live constraint check — conservation area, Article 4 and sold-price comparables, cited to source.
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