Blackheath / Kidbrooke — covered by Greenwich 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.
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Rear dormer drawings delivered by an MCIAT chartered team.


SE3 primarily covers Blackheath / Kidbrooke in Greenwich. It also touches Lewisham.
Decisions for SE3 are made by Greenwich 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 Greenwich: No.
Building regs from £950. We do not charge hourly. Free site survey across all SE3 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. Greenwich Council timelines align with the national norm.
Blackheath / Kidbrooke in SE3 is characterised by the housing stock of Greenwich — broadly georgian in greenwich town centre.

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Every SE3 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. SE3 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| SE3 | Blackheath / Kidbrooke | Georgian villas, Victorian terraces | Blackheath / Kidbrooke is split at SE3. Either Greenwich Council or Lewisham Council can determine a drawing package here, so the SE3 address is checked against both policies maps first. |
| SE3 | Blackheath (Greenwich) | Georgian villas, Victorian terraces | Blackheath (Greenwich) sits inside SE3; drawing package proposals here are determined by Greenwich Council. |
| SE3 | Kidbrooke | New-build, post-war fragments | Kidbrooke sits inside SE3; drawing package proposals here are determined by Greenwich Council. |
| SE3 | Blackheath | Georgian villas, Victorian terraces | Blackheath sits inside SE3; drawing package proposals here are determined by Lewisham Council. |
| SE2 | Abbey Wood | mixed stock | Adjoining district to SE3, also inside Greenwich for drawing package purposes. |
| SE7 | Charlton | Victorian villas, 1930s semi-detached | Adjoining district to SE3, also inside Greenwich for drawing package purposes. |
| SE9 | Eltham / Mottingham | 1930s semi-detached, post-war flats | Adjoining district to SE3, also inside Greenwich for drawing package purposes. |
| SE4 | Brockley | Victorian and Edwardian terraces | Adjoining district to SE3, also inside Lewisham for drawing package purposes. |
| SE6 | Catford / Bellingham | 1930s semi-detached, post-war flats | Adjoining district to SE3, also inside Lewisham for drawing package purposes. |
| SE8 | Deptford | Georgian terraces, post-war estates, new-build | Adjoining district to SE3, also inside Lewisham for drawing package purposes. |
| SE12 | Lee / Grove Park | mixed stock | Adjoining district to SE3, also inside Lewisham for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few SE3 streets, and each one changes what a drawing package can achieve at that address.
How designation changes a SE3 (Blackheath / Kidbrooke) drawing package: Greenwich Council maintains 20 conservation areas, including Blackheath, Charlton, Eltham Park. Inside any of them a SE3 (Blackheath / Kidbrooke) 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. Charlton sets the tone for SE3 (Blackheath / Kidbrooke) casework.
No blanket Article 4 over SE3 (Blackheath / Kidbrooke): Greenwich Council has not withdrawn permitted development across SE3 (Blackheath / Kidbrooke), so a drawing package outside a SE3 (Blackheath / Kidbrooke) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a SE3 owner wants on file.
What SE3 (Blackheath / Kidbrooke) is built from: Georgian in Greenwich town centre; Victorian terraces in East Greenwich, Charlton; inter-war semi-detached in Eltham; new-build along the riverside. World Heritage Site status in Greenwich town centre adds heritage weight; outer borough areas (Eltham, Thamesmead) generally permissive. That mix decides the drawing package route in SE3 (Blackheath / Kidbrooke) more than the postcode does, and it is what a Greenwich Council case officer reads first. A householder application costs £548 paid to Greenwich Council direct, with 8 weeks to a decision once validated.
How designation changes a SE3 (Blackheath / Kidbrooke) drawing package: Lewisham Council maintains 30 conservation areas, including Deptford High Street, Forest Hill, Hither Green. Inside any of them a SE3 (Blackheath / Kidbrooke) 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. Forest Hill sets the tone for SE3 (Blackheath / Kidbrooke) casework.
No blanket Article 4 over SE3 (Blackheath / Kidbrooke): Lewisham Council has not withdrawn permitted development across SE3 (Blackheath / Kidbrooke), so a drawing package outside a SE3 (Blackheath / Kidbrooke) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a SE3 owner wants on file.
What SE3 (Blackheath / Kidbrooke) is built from: Victorian and Edwardian terraces across Brockley, Honor Oak, Forest Hill; 1930s semi-detached in Catford and Hither Green; post-war mixed in Deptford. Generally permissive planning compared to central boroughs; loft conversions and side-return extensions routinely approved under PD. That mix decides the drawing package route in SE3 (Blackheath / Kidbrooke) more than the postcode does, and it is what a Lewisham Council case officer reads first. A householder application costs £548 paid to Lewisham Council direct, with 8 weeks to a decision once validated.
Sources for this SE3 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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