Brixton / Stockwell — covered by Lambeth 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.


SW9 primarily covers Brixton / Stockwell in Lambeth.
Decisions for SW9 are made by Lambeth 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 Lambeth: Yes.
Building regs from £950. We do not charge hourly. Free site survey across all SW9 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. Lambeth Council timelines align with the national norm.
Brixton / Stockwell in SW9 is characterised by the housing stock of Lambeth — broadly victorian terraces in clapham, brixton, herne hill.

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Every SW9 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. SW9 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| SW9 | Brixton / Stockwell | Victorian terraces, post-war estates | Brixton / Stockwell sits wholly inside SW9, so Lambeth Council validates every drawing package submitted from an SW9 address. |
| SW9 | Brixton | Victorian terraces, post-war estates | Brixton sits inside SW9; drawing package proposals here are determined by Lambeth Council. |
| SW9 | Stockwell | Victorian terraces, post-war estates | Stockwell sits inside SW9; drawing package proposals here are determined by Lambeth Council. |
| SE11 | Kennington / Vauxhall | Georgian terraces, post-war estates | Adjoining district to SW9, also inside Lambeth for drawing package purposes. |
| SE24 | Herne Hill | Victorian villas, Edwardian terraces | Adjoining district to SW9, also inside Lambeth for drawing package purposes. |
| SE27 | West Norwood / Tulse Hill | Victorian terraces, Edwardian villas | Adjoining district to SW9, also inside Lambeth for drawing package purposes. |
| SW2 | Brixton Hill / Tulse Hill | Victorian terraces, post-war estates | Adjoining district to SW9, also inside Lambeth for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few SW9 streets, and each one changes what a drawing package can achieve at that address.
SW9 (Brixton / Stockwell) conservation designations: there are 64 across Lambeth Council, Brockwell Park, Streatham Hill, Clapham Common among them. Designation costs a SW9 (Brixton / Stockwell) 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. Kennington is the SW9 (Brixton / Stockwell) designation that most often changes a drawing package design.
What Article 4 removes near SW9 (Brixton / Stockwell): Borough-wide Article 4 for HMO conversions; plus office-to-residential restrictions. Before pricing a drawing package we check whether the SW9 address is inside the mapped area, because Lambeth Council draws the SW9 (Brixton / Stockwell) boundary street by street rather than across the whole of SW9 (Brixton / Stockwell).
The building fabric around SW9 (Brixton / Stockwell): Victorian terraces in Clapham, Brixton, Herne Hill; Edwardian villas; 1930s and post-war estates in parts of Streatham; Georgian in Kennington. Mix of dense Victorian residential and post-war estate; strong conservation area coverage; generally design-led planning decisions. A drawing package in SW9 (Brixton / Stockwell) 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 Lambeth Council.
Sources for this SW9 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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