SE27 · West Norwood & Tulse Hill edge
SE27 is West Norwood — Victorian and Edwardian terraces in Lambeth with deep rear-extension and loft precedent. Outside conservation and householder Article 4 streets, permitted development often applies; the Building Alterations and Extensions SPD frames full applications where designation bites.
Location data: postcodes.io · Constraints: planning.data.gov.uk (borough-level) · Open Government Licence
Constraint context · Lambeth
Real · planning.data.gov.ukLambeth has 62 designated conservation areas and 12 Article 4 areas. A district is too coarse to say which apply to your house — postcode districts span many streets and designations are drawn street by street. Enter a full postcode below for the point-level check, or read the full borough picture on the Lambeth planning guide.
Is SE27 in a conservation area?
Partly — and which part matters. A postcode district is never uniformly designated: SE27 contains 7 conservation areas within 1km of its centre, and whether your own property sits inside one decides whether permitted development survives. The centre point of SE27 itself does not fall inside one — but many of its streets will.
| Elderwood | Nearby |
| Lancaster Avenue | Nearby |
| Leigham Court Road (South) | Nearby |
| Norwood Grove | Nearby |
| Park Hall Road | Nearby |
| Rosendale Road | Nearby |
| West Norwood | Nearby |
Conservation areas whose official geometry lies within 1km of the centre of SE27. Source: planning.data.gov.uk · Open Government Licence. Proximity to the district centre is not a statement about your own address — run the address check for that.
Does an Article 4 direction apply in SE27?
Yes — SE27 has 3 Article 4 directions mapped within 1km of its centre. An Article 4 direction withdraws specific permitted-development rights on the streets it covers, which is the most common reason a project that looks like permitted development turns out to need a full application. The centre point of SE27 falls inside Modified Direction 2 - KIBAs and WNCBC.
| Modified Direction 2 - KIBAs and WNCBC | At the centre |
| Modified Direction 3 - Town Centres | Nearby |
| PARK HALL ROAD | Nearby |
Article 4 directions whose official geometry lies within 1km of the centre of SE27. Source: planning.data.gov.uk · Open Government Licence. The national dataset omits some property-specific directions — the council register is always definitive.
Every designation in the borough: Lambeth planning guide →
Do you need planning permission in SE27?
Three routes exist, and which one you are on is decided by your address, not your postcode district:
| Permitted development — no application. The work stays inside the GPDO limits and no designation removes them. A Lawful Development Certificate is cheap proof for a future buyer. | No permission |
| Prior approval — the larger single-storey rear extension route, with neighbour consultation. Not available on designated land. | 42 days |
| Full householder application — required once a designation removes your permitted-development right, or the scheme exceeds the limits. | 8 weeks |
SE27 contains mapped conservation-area or Article 4 geometry, so a meaningful share of its streets will have lost some permitted-development rights — which pushes those properties onto the full-application route. Whether yours is one of them is an address-level question, not a district-level one.
What does planning permission cost in SE27?
| Householder planning application | £548 (from 1 April 2026) |
| Lawful Development Certificate — proposed works | £274 (half the application fee) |
| Lawful Development Certificate — existing works | £548 (the full application fee) |
| Listed building consent | No fee |
| Resubmission after a refusal | Free once, within 12 months of the decision |
National statutory figures for England — councils do not set them, so they are the same in every borough. Planning fees re-index every 1 April; confirm the current amount on the Planning Portal fee calculator before you apply. These are the council's fees only — drawings, surveys and any specialist reports are separate.
How long does it take?
| Householder application — statutory target | 8 weeks |
| Householder application — in practice | 8–12 weeks |
| Prior approval (larger home extension) | 42 days |
| Lawful Development Certificate | 8 weeks |
| Householder appeal — deadline to lodge | 12 weeks from the decision date |
| Householder appeal — typical decision | Around 18 weeks |
What if it's refused?
A refusal is a decision notice with reasons attached, and those reasons are a roadmap. Most homeowners in Lambeth — as anywhere in England — are better served by amending the scheme and using the free resubmission than by appealing: you get one further application on the same site within 12 months without paying again.
| Who can appeal | The applicant only — not neighbours |
| Fee to appeal | None — you bear your own costs |
| Procedure | Written representations for most householder appeals |
| Success rate | Roughly a third — about 36% of householder appeals allowed in 2025/26 |
Appeals go to the Planning Inspectorate, an independent national body. How to read a refusal and choose your route →
Planning permission by project in Lambeth
Clapham, Brixton and Streatham terraces are deep PD-precedent territory; conservation and the targeted Article 4 areas need a full application.
Rear extension in Lambeth →The signature project on Clapham and Brixton's Victorian terraces — the precedent base is deep.
Side return extension in Lambeth →Follow the street's roof pattern and rear dormers approve well; conservation and Article 4 areas need an application.
Loft conversion in Lambeth →Single-storey basements under the footprint can succeed; expect a full impact assessment and structural method.
Basement extension in Lambeth →The garden-office market is strong; short terrace gardens make the 50% coverage and boundary-height rules binding.
Garden room in Lambeth →Pinpoint your street
More of Lambeth
Brixton-to-Streatham terrace belt with targeted conservation-area Article 4s.
Borough page →Planning Permission Checker provides planning and cost intelligence for early feasibility only. It is not legal, planning, valuation, architectural, structural, or surveying advice. All estimates are indicative and must be verified by qualified professionals before purchase, design, planning submission, or construction.
Cost estimates are indicative only — not a quotation. Final price depends on survey, specification, structure, access, party wall matters, VAT, professional fees, and contractor availability.
Planning outcomes are not guaranteed. Local planning authorities make final decisions.