Raynes Park — covered by Merton Council.
Planning permission drawings delivered by an MCIAT chartered team.
Building regulations drawings delivered by an MCIAT chartered team.
Loft conversion drawings delivered by an MCIAT chartered team.
House extension drawings delivered by an MCIAT chartered team.
Mansard roof extensions delivered by an MCIAT chartered team.
Garage conversion drawings delivered by an MCIAT chartered team.
Basement conversion drawings delivered by an MCIAT chartered team.
Structural calculations delivered by an MCIAT chartered team.
Measured building survey delivered by an MCIAT chartered team.
Party wall services delivered by an MCIAT chartered team.
Rear dormer drawings delivered by an MCIAT chartered team.


SW20 primarily covers Raynes Park in Merton.
Decisions for SW20 are made by Merton Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Merton: No.
Building regs from £950. We do not charge hourly. Free site survey across all SW20 addresses.
From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Merton Council timelines align with the national norm.
Raynes Park in SW20 is characterised by the housing stock of Merton — broadly victorian villas in wimbledon.

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Every SW20 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. SW20 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| SW20 | Raynes Park | Victorian villas, Edwardian terraces | SW20 covers Raynes Park only; Merton Council handles the drawing package. |
| SW20 | Wimbledon | Victorian villas, Edwardian terraces | Wimbledon sits inside SW20; drawing package proposals here are determined by Merton Council. |
| SW19 | Wimbledon / Colliers Wood | Victorian villas, Edwardian terraces | Adjoining district to SW20, also inside Merton for drawing package purposes. |
| SM4 | Morden | 1930s semi-detached, post-war flats | Adjoining district to SW20, also inside Merton for drawing package purposes. |
| CR4 | Mitcham | 1930s semi-detached, post-war estates | Adjoining district to SW20, also inside Merton for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few SW20 streets, and each one changes what a drawing package can achieve at that address.
How designation changes a SW20 (Raynes Park) drawing package: Merton Council maintains 28 conservation areas, including Wimbledon Common, Wimbledon Village, John Innes. Inside any of them a SW20 (Raynes Park) drawing package 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. John Innes sets the tone for SW20 (Raynes Park) casework.
No blanket Article 4 over SW20 (Raynes Park): Merton Council has not withdrawn permitted development across SW20 (Raynes Park), so a drawing package 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 drawing package 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 drawing package 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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