Bexleyheath / Barnehurst — covered by Bexley Council.
Planning permission drawings delivered by a CIAT-affiliated team.
Building regulations drawings delivered by a CIAT-affiliated team.
Loft conversion drawings delivered by a CIAT-affiliated team.
House extension drawings delivered by a CIAT-affiliated team.
Mansard roof extensions delivered by a CIAT-affiliated team.
Garage conversion drawings delivered by a CIAT-affiliated team.
Basement conversion drawings delivered by a CIAT-affiliated team.
Structural calculations delivered by a CIAT-affiliated team.
Measured building survey delivered by a CIAT-affiliated team.
Party wall services delivered by a CIAT-affiliated team.
Rear dormer drawings delivered by a CIAT-affiliated team.


DA7 primarily covers Bexleyheath / Barnehurst in Bexley.
Decisions for DA7 are made by Bexley 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 Bexley: No.
Building regs from £950. We do not charge hourly. Site survey across all DA7 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. Bexley Council timelines align with the national norm.
Bexleyheath / Barnehurst in DA7 is characterised by the housing stock of Bexley — broadly 1930s semi-detached dominates.

Every DA7 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. DA7 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| DA7 | Bexleyheath / Barnehurst | 1930s semi-detached | DA7 covers Bexleyheath / Barnehurst only; Bexley Council handles the drawing package. |
| DA7 | Bexleyheath | 1930s semi-detached | Bexleyheath sits inside DA7; drawing package proposals here are determined by Bexley Council. |
| DA7 | Barnehurst | 1930s semi-detached | Barnehurst sits inside DA7; drawing package proposals here are determined by Bexley Council. |
| DA1 | Crayford / Dartford fringe | Victorian terraces, 1930s semi-detached | Adjoining district to DA7, also inside Bexley for drawing package purposes. |
| DA5 | Old Bexley | Georgian villas, Victorian cottages | Adjoining district to DA7, also inside Bexley for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few DA7 streets, and each one changes what a drawing package can achieve at that address.
Conservation areas covering DA7 (Bexleyheath / Barnehurst): Bexley Council runs 16, and Crayford, Welling, Bexley Village are the ones DA7 (Bexleyheath / Barnehurst) owners meet most. A drawing package inside a DA7 (Bexleyheath / Barnehurst) conservation area loses permitted development, so the DA7 (Bexleyheath / Barnehurst) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Welling a drawing package is judged on the street elevation first.
Article 4 and your DA7 (Bexleyheath / Barnehurst) drawing package: Bexley Council has made no borough-wide direction, so permitted development for a drawing package in DA7 (Bexleyheath / Barnehurst) generally survives outside DA7 (Bexleyheath / Barnehurst) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a DA7 owner records that a drawing package was lawful.
The building fabric around DA7 (Bexleyheath / Barnehurst): 1930s semi-detached dominates; Victorian cottages in Bexley Village and Crayford; post-war estates in Thamesmead and Erith. Outer south-east London suburban; very permissive planning environment; strong PD uptake for extensions and loft conversions. A drawing package in DA7 (Bexleyheath / Barnehurst) 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 Bexley Council.
Sources for this DA7 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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