Wandsworth / Earlsfield / Southfields — covered by Wandsworth 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.


SW18 primarily covers Wandsworth / Earlsfield / Southfields in Wandsworth.
Decisions for SW18 are made by Wandsworth 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 Wandsworth: Yes.
Building regs from £950. We do not charge hourly. Free site survey across all SW18 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. Wandsworth Council timelines align with the national norm.
Wandsworth / Earlsfield / Southfields in SW18 is characterised by the housing stock of Wandsworth — broadly extensive victorian terraced streets — the classic london side-return extension opportunity.

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Every SW18 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. SW18 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| SW18 | Wandsworth / Earlsfield / Southfields | Victorian villas and terraces | SW18 covers Wandsworth / Earlsfield / Southfields only; Wandsworth Council handles the drawing package. |
| SW18 | Wandsworth Common | Victorian villas and terraces | Wandsworth Common sits inside SW18; drawing package proposals here are determined by Wandsworth Council. |
| SW18 | Earlsfield | Victorian terraces | Earlsfield sits inside SW18; drawing package proposals here are determined by Wandsworth Council. |
| SW18 | Southfields | 1930s semi-detached, Edwardian terraces | Southfields sits inside SW18; drawing package proposals here are determined by Wandsworth Council. |
| SW18 | Tonsleys | Victorian terraces | Tonsleys sits inside SW18; drawing package proposals here are determined by Wandsworth Council. |
| SW11 | Battersea / Clapham Junction | Victorian terraces, mansion blocks | Adjoining district to SW18, also inside Wandsworth for drawing package purposes. |
| SW12 | Balham | Victorian and Edwardian terraces | Adjoining district to SW18, also inside Wandsworth for drawing package purposes. |
| SW15 | Putney / Roehampton | Edwardian terraces, Victorian villas, mansion blocks | Adjoining district to SW18, also inside Wandsworth for drawing package purposes. |
| SW17 | Tooting / Earlsfield | Edwardian terraces | Adjoining district to SW18, also inside Wandsworth for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few SW18 streets, and each one changes what a drawing package can achieve at that address.
SW18 (Wandsworth / Earlsfield / Southfields) conservation designations: there are 45 across Wandsworth Council, Nightingale Triangle, Wandsworth Common, Clapham Common West among them. Designation costs a SW18 (Wandsworth / Earlsfield / Southfields) owner the permitted-development route: a drawing package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Tonsley is the SW18 (Wandsworth / Earlsfield / Southfields) designation that most often changes a drawing package design.
Article 4 and your SW18 (Wandsworth / Earlsfield / Southfields) drawing package: Article 4 for HMO conversions covering the whole borough. At a SW18 address that matters twice over, because Wandsworth Council applies the direction unevenly across SW18 (Wandsworth / Earlsfield / Southfields) — we read the SW18 (Wandsworth / Earlsfield / Southfields) policies map for the exact SW18 address before quoting architectural drawings.
The building fabric around SW18 (Wandsworth / Earlsfield / Southfields): 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. A drawing package in SW18 (Wandsworth / Earlsfield / Southfields) 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 Wandsworth Council.
Sources for this SW18 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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