TW13 · Feltham
TW13 is Feltham — the Feltham Town Centre and Bedfont Green conservation areas and the western suburbs near Heathrow. Conservation coverage is lighter here, so permitted development carries many projects, with the borough's HMO Article 4 the control most likely to apply.
Location data: postcodes.io · Constraints: planning.data.gov.uk (borough-level) · Open Government Licence
Constraint context · Hounslow
Real · planning.data.gov.ukHounslow has 34 designated conservation areas and 2 Article 4 areas. A district is too coarse to say which apply to your house — postcode districts span many streets and TW13 crosses 2 boroughs. Enter a full postcode below for the point-level check, or read the full borough picture on the Hounslow planning guide.
Is TW13 in a conservation area?
Partly — and which part matters. A postcode district is never uniformly designated: TW13 contains 2 conservation areas within 1km of its centre, and whether your own property sits inside one decides whether permitted development survives. The centre point of TW13 itself falls inside Hanworth Park.
| Feltham Town Centre | Nearby |
| Hanworth Park | At the centre |
Conservation areas whose official geometry lies within 1km of the centre of TW13. 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 TW13?
Yes — TW13 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 TW13 does not fall inside one, but coverage is street-level — verify your own address.
| Change of use or development that would result in new dwellings (Class MA/ZA) | Nearby |
| Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction | Nearby |
Article 4 directions whose official geometry lies within 1km of the centre of TW13. 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: Hounslow planning guide →
Do you need planning permission in TW13?
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 |
TW13 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 TW13?
| 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 Hounslow — 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 Hounslow
Chiswick and Isleworth terraces extend under PD outside the conservation areas; Bedford Park and the heritage areas need a full application.
Rear extension in Hounslow →A staple on the Chiswick and Brentford terraces; Bedford Park and the heritage areas need a full application.
Side return extension in Hounslow →Common on the Chiswick and Isleworth stock; Bedford Park and the heritage areas decide dormer form via a full application.
Loft conversion in Hounslow →More common in Chiswick's higher-value streets; a full application with structural and, near the river, flood-risk evidence is expected, to the Residential Extension Guidelines SPD.
Basement extension in Hounslow →Workable under PD on many plots; Bedford Park and the conservation areas can remove outbuilding rights — check the address.
Garden room in Hounslow →Pinpoint your street
More of Hounslow
Chiswick and Bedford Park heritage to Heathrow's edge; HMO and garden-suburb 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.