A single-storey rear extension with bifold doors opening onto a narrow London garden

SE4 · Brockley · Lewisham

Planning and building regulation drawings in Brockley (SE4)

Brockley reads as a hill of villas long before it reads as a postcode. Walk up from the station and the houses get bigger with the gradient: semi-detached and detached Victorian villas giving way to long terraces, most of it laid down in a single confident burst in the mid and late nineteenth century. Streets like Brockley Road, Wickham Road, Tressillian Road and Breakspears Road still carry that original grain, the kind of front elevation that was built to be looked at.

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London Borough of Lewisham granted 90% of 637 householder applications
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That coherence is exactly why a lot of it sits inside a conservation area, and why the area's owners tend to plan extensions and loft conversions with the street's appearance in mind rather than against it. A side-return dig into a Victorian kitchen, a rear addition that steps back from the boundary, a loft conversion that keeps the roofline reading correctly from the pavement, these are the projects that suit the housing stock here, and they're also the ones Lewisham's planners look at hardest. Wickham Road and its neighbours also carry Tree Preservation Orders on mature street trees, so a garden design has to work around root protection zones as much as around the extension itself. None of this rules work out. It changes the order of operations: find out what applies to a specific house before assuming a rear extension is a simple permitted development job, because on a villa inside the conservation area it usually isn't.

Planning in Brockley: what to know before you apply

Lewisham runs a borough-wide Article 4 direction that removes permitted development rights for converting a house into a small house in multiple occupation, so any change from a single dwelling to shared occupation needs planning permission regardless of address. Within the Brockley conservation area a second Article 4 direction goes further, removing the general permitted development rights that would otherwise let an owner add a rear extension or loft dormer without applying. That means most schemes on the grand Victorian villas and terraces on the hill need a full householder application rather than a lawful development certificate. Outside the conservation boundary, permitted development still covers a good share of side-return and hip-to-gable loft work, but boundary lines on a hill like this are not always obvious from the street, so we confirm the designation against the official map before anything gets drawn.

Applications are decided by London Borough of Lewisham — its planning pages.

Check your route

Does your Brockley project need planning permission?

Route check · Brockley (SE4)

ProjectProperty

Listed building?

Conservation area?

Likely permitted development — no planning applicationNeeds checking

A single-storey rear extension up to 4 m deep on a detached house, or 3 m on any other house, is Class A permitted development subject to the height and materials conditions.
An Article 4 direction applies here and may withdraw this freedom — the schedule must be checked before relying on it.
One or more constraints are unknown — we check the council's registers as part of the free appraisal.
Where permitted development applies, a lawful development certificate proves it for lenders and buyers.

Sources: GPDO 2015, Schedule 2, Part 1 · Planning Portal — common projects · Building Regulations 2010 — when approval is needed

This is a first-pass indication from the national rules, not planning advice for your property. Your council's registers, any Article 4 schedule and the exact dimensions decide it — the free appraisal checks all three before we recommend a route.

Confirm it with a free appraisal

Brockley (SE4) in numbers

What London Borough of Lewisham has decided, and what SE4 is built of — the two facts that shape every job here.

Householder planning decisions — London Borough of Lewisham

Brockley (SE4) applications are decided by London Borough of Lewisham; these are its published householder figures for the last four quarters.

Householder applications decided2025 Q2 to 2026 Q1	637
Granted	576
Refused	61
Grantedof 637 decisions · England 90%	90%
Decided within 8 weeksof 464, excluding prior approvals	95%

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Permitted development prior approvals — London Borough of Lewisham

How the larger-home-extension route has fared with London Borough of Lewisham, which decides SE4 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1	103
Prior approval granted	4
Prior approval refused	71
Grantedof 75 determined	5%

Source: Ministry of Housing, Communities and Local Government (PS1 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Planning appeals — London Borough of Lewisham

Refusals in SE4 can be appealed to the Planning Inspectorate; this is London Borough of Lewisham's householder appeal record.

Householder appeals determined2021–2026	164
Allowed	50
Allowedof 164 · England 36%	30%

Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-09-22.

Conservation areas and Article 4 directions — London Borough of Lewisham

Register counts for London Borough of Lewisham. A count describes what the council has published, never a rank against another council.

Conservation areas in the register	30
Article 4 directions in the register	57
Areas covered by an Article 4 direction	89

Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-09-22.

What SE4 is built of

Residential building form across Brockley (SE4), from 378 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side	66%
Attached on one side	29%
Detached	5%
Median building footprint	63 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate	1.99
Buildings classified	378

Source: Ordnance Survey National Geographic Database (derived statistics). Contains OS data © Crown copyright and database right 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Extracted 2026-09-22.

Day 0Measured survey of your Brockley property — or your existing plans if you have them.
About 7 daysDrawings issued for your approval. Free redraws until you are happy.
SubmissionWe validate against London Borough of Lewisham’s checklist and submit on your behalf.
Council: 8-week targetHouseholder applications carry an 8-week statutory target. London Borough of Lewisham decided 95% of 464 recent householder applications inside it.

Source: Ministry of Housing, Communities and Local Government (PS2 district planning application statistics). Open Government Licence v3.0 Extracted 2026-09-22.

Neighbourhoods

Streets and neighbourhoods in SE4

Brockleypredominantly grand mid- and late-Victorian

Nearby

Nearby postcode districts

Blackheath SE3Camberwell SE5Bermondsey SE1Catford SE6West Norwood SE27Charlton SE7Sydenham SE26Deptford SE8

FAQ

Brockley (SE4) — FAQs

Is my house in Brockley actually inside the conservation area?+

Not automatically, even on a street that looks the part. The conservation area follows a mapped boundary, not the housing style, so two houses on the same road can sit on opposite sides of it. We check the boundary against your address before advising on what needs an application, because the answer changes what permitted development covers.

Can I still get a loft conversion or rear extension approved inside the conservation area?+

Yes, in most cases, it just goes through planning permission rather than permitted development. Lewisham's design control in Brockley focuses on how the roofline and rear massing read from neighbouring gardens and the street, so a scheme that respects the villa's proportions and materials has a good path through, it just needs the fuller application rather than a certificate.

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