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A brick rear extension with bifold doors opening onto a narrow London garden
SE14 · New Cross · Lewisham

Planning and building regulation drawings in New Cross (SE14)

New Cross climbs from the shopfronts on New Cross Road up into Telegraph Hill, and the change in gradient tells you almost everything about what homeowners here are dealing with. Down on the flat, Hatcham mixes commercial frontages with Victorian terraces set behind them, plus newer flats and student blocks that have filled in the gaps over the years. The gradient is steep enough in places that a rear extension on one side of the road can sit well below next door's kitchen window, and Pepys Road and Jerningham Road are among the names on that hillside grid.

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  • London Borough of Lewisham granted 90% of 637 householder applications
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That hill shapes what's realistic to build. A loft in the Telegraph Hill Conservation Area has to sit within a roofline Lewisham has decided is worth protecting, because Article 4 controls remove the usual permitted-development shortcuts for elevation changes there. The same Article 4 restriction on external works applies across the Hatcham Conservation Area, and Kitto Road and Erlanger Road are among the street names that come up when clients ask us which side of that boundary they fall on. Sash windows, front garden walls, and the general roofscape are the details Lewisham's planners look at hardest on these streets, so a drawing set that treats them as an afterthought tends to come back with questions. We draw for both the terrace and the villa condition, and we check which conservation area and which Article 4 direction actually touches your street before anything goes to scale.

Most of the work we see in SE14 falls into three camps: rear or side-return extensions on the flatter Hatcham terraces, loft conversions on the taller Telegraph Hill villas, and internal reconfigurations where a Victorian layout no longer suits how a family actually lives. None of it is exotic. It's the ordinary business of getting more from a house that was built for a smaller, different household, done in a way that respects streets Lewisham has decided are worth protecting.

Planning in New Cross: what to know before you apply

Lewisham's planning team runs on the same borough-wide framework as everywhere else in the borough, but two things bite harder in SE14 than in most of Lewisham. First, the borough-wide direction removing permitted development for HMO conversions applies here as it does everywhere, so turning a house into a house in multiple occupation needs planning permission rather than a straightforward change of use. Second, the Telegraph Hill and Hatcham conservation area designations bring their own Article 4 restrictions on external works, meaning changes to windows, doors, and other elevation details that would be permitted development elsewhere often need consent here. For homeowners outside those designated areas, hip-to-gable lofts and modest rear extensions still frequently qualify as permitted development, but the steep, consistent building lines on the hill mean height and massing get scrutinised closely regardless. We confirm the exact designation covering your address, and build the application around it, before we draw anything.

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

Check your route

Does your New Cross project need planning permission?

Route check · New Cross (SE14)

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.

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New Cross (SE14) in numbers

What London Borough of Lewisham has decided, and what SE14 is built of — the two facts that shape every job here.

Householder planning decisions — London Borough of Lewisham

New Cross (SE14) 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 Q1637
Granted576
Refused61
Grantedof 637 decisions · England 90%90%
Decided within 8 weeksof 464, excluding prior approvals95%

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 SE14 notifications.

Larger home extension prior approvals — not required2024 Q2 to 2026 Q1103
Prior approval granted4
Prior approval refused71
Grantedof 75 determined5%

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 SE14 can be appealed to the Planning Inspectorate; this is London Borough of Lewisham's householder appeal record.

Householder appeals determined2021–2026164
Allowed50
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 register30
Article 4 directions in the register57
Areas covered by an Article 4 direction89

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

What SE14 is built of

Residential building form across New Cross (SE14), from 196 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.

Attached on more than one side71%
Attached on one side27%
Detached2%
Median building footprint63 m²
Addresses per buildingAbove about 2 means flats and maisonettes dominate2.19
Buildings classified196

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.

  1. Day 0Measured survey of your New Cross property — or your existing plans if you have them.
  2. About 7 daysDrawings issued for your approval. Free redraws until you are happy.
  3. SubmissionWe validate against London Borough of Lewisham’s checklist and submit on your behalf.
  4. 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 SE14

FAQ

New Cross (SE14) — FAQs

Does my house being in a conservation area stop me extending?+
No, but it changes how you extend. Telegraph Hill and Hatcham conservation area status doesn't block a rear extension or a loft outright; it means external alterations that might otherwise be permitted development, like changes to windows or rooflines, usually need planning permission instead. A side extension inside either conservation area falls into that same category rather than going through as of right. The design has to sit comfortably with the Victorian roofline and street pattern Lewisham has chosen to protect, which is a question of proportion and materials more than one of whether the extension can happen at all.
Can I convert my New Cross house into flats without planning permission?+
No. Splitting a single dwelling into separate flats is a change of use that always needs planning permission, in New Cross as everywhere else, regardless of conservation area status or Article 4 directions. The Article 4 controls in this district specifically target elevation changes and HMO conversions rather than flat conversions, but that doesn't remove the separate requirement for planning consent when you're creating additional self-contained units within the building.
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