SW12 · Balham
SW12 is Balham — the streets around Nightingale Lane and the Clapham Common conservation-area edge, classic family-terrace stock. Outside the conservation areas many houses keep permitted development rights; Policy LP6 frames the borough's frequent basement projects.
Location data: postcodes.io · Constraints: planning.data.gov.uk (borough-level) · Open Government Licence
Constraint context · Wandsworth
Real · planning.data.gov.ukWandsworth has 45 designated conservation areas and 0 Article 4 areas. A district is too coarse to say which apply to your house — postcode districts span many streets and SW12 crosses 2 boroughs. Enter a full postcode below for the point-level check, or read the full borough picture on the Wandsworth planning guide.
Is SW12 in a conservation area?
Partly — and which part matters. A postcode district is never uniformly designated: SW12 contains 10 conservation areas within 1km of its centre, and whether your own property sits inside one decides whether permitted development survives. The centre point of SW12 itself does not fall inside one — but many of its streets will.
| Clapham | Nearby |
| Clapham Common | Nearby |
| Dinsmore Road | Nearby |
| Heaver Estate | Nearby |
| Hyde Farm | Nearby |
| La Retraite | Nearby |
| Nightingale Lane | Nearby |
| Oaklands Estate | Nearby |
| Old Devonshire Road | Nearby |
| Wandsworth Common | Nearby |
Conservation areas whose official geometry lies within 1km of the centre of SW12. 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 SW12?
Yes — SW12 has 2 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 SW12 does not fall inside one, but coverage is street-level — verify your own address.
| HYDE FARM | Nearby |
| Modified Direction 2 - KIBAs and WNCBC | Nearby |
Article 4 directions whose official geometry lies within 1km of the centre of SW12. 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: Wandsworth planning guide →
Do you need planning permission in SW12?
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 |
SW12 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 SW12?
| 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 Wandsworth — 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 Wandsworth
The 'between the commons' terraces extend routinely; scale against the neighbour's daylight to clear the 45-degree test.
Rear extension in Wandsworth →Among the highest-return projects on the Wandsworth terraces; steelwork and party-wall work drive the cost.
Side return extension in Wandsworth →Strong loft stock; conservation-area dormers and rooflines get the closest scrutiny.
Loft conversion in Wandsworth →Policy LP6 treats multi-level basements as inappropriate and expects roughly half of both gardens retained, plus a metre of soil above.
Basement extension in Wandsworth →Common across the borough's terrace gardens; the 2.5m boundary-height rule is the most-breached limit.
Garden room in Wandsworth →Pinpoint your street
More of Wandsworth
Putney-to-Battersea terrace and villa belt; tight basement policy (LP6).
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.