Planning and building regulation drawings in Cranford (TW5)
Cranford sits on the Heathrow fringe. The district is mostly interwar semis and post-war houses with generous back gardens, and The Avenue, Berkeley Avenue, Chaucer Avenue and Cranford Lane are among its roads. The stock suits a single-storey rear extension, a side infill, a hip-to-gable loft conversion or a rear dormer. No householder Article 4 direction is published for Cranford, so outside the conservation areas those works can be permitted development when they stay inside the standard limits.
- MCIAT chartered technologists
- London Borough of Hounslow granted 75% of 704 householder applications
- Drawings in about 7 days
The exceptions are tightly local. The Cranford Village and Cranford Park conservation areas protect the historic core and the edge of the parkland, so design is tighter in those pockets. In a conservation area, roof enlargements, side extensions and rear extensions of more than one storey are not permitted development, so a hip-to-gable or dormer that is routine on a nearby road needs a full application. A house a few doors outside the boundary may have none of that.
Cranford's other constraints are less visible. Much of the area falls under aircraft-noise designations, which affect how glazing and ventilation are specified in an extension or loft conversion. Land near the River Crane and Cranford Park can fall within flood zones, so drainage-conscious design matters for a larger rear extension. Semi-detached stock also means a party wall agreement is routine for rear and side work, and we raise it early.
Our approach is to check the conservation map, the flood map and the noise position for your address at the start, and only then settle on a route.
Planning in Cranford: what to know before you apply
Hounslow applies its design controls most tightly in its conservation areas, and in Cranford those are Cranford Village and Cranford Park. Elsewhere in the district the house can be extended under permitted development within the standard limits, though flats have no householder rights and a larger scheme goes through a householder application assessed on design and neighbour impact. Inside a conservation area, roof enlargements, side extensions and rear extensions of more than one storey are not permitted development. The council also has Article 4 directions on HMO conversions in parts of the borough, where three to six unrelated sharers is the trigger. Every application needs scaled plans, a location plan and the right ownership certificate or notice, and flood and noise are checked alongside.
Applications are decided by London Borough of Hounslow — its planning pages.
Does your Cranford project need planning permission?
Cranford (TW5) in numbers
What London Borough of Hounslow has decided, and what TW5 is built of — the two facts that shape every job here.
Householder planning decisions — London Borough of Hounslow
Cranford (TW5) applications are decided by London Borough of Hounslow; these are its published householder figures for the last four quarters.
| Householder applications decided2025 Q2 to 2026 Q1 | 704 |
|---|---|
| Granted | 526 |
| Refused | 178 |
| Grantedof 704 decisions · England 90% | 75% |
| Decided within 8 weeksof 404, excluding prior approvals | 97% |
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 Hounslow
How the larger-home-extension route has fared with London Borough of Hounslow, which decides TW5 notifications.
| Larger home extension prior approvals — not required2024 Q2 to 2026 Q1 | 263 |
|---|---|
| Prior approval granted | 54 |
| Prior approval refused | 138 |
| Grantedof 192 determined | 28% |
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 Hounslow
Refusals in TW5 can be appealed to the Planning Inspectorate; this is London Borough of Hounslow's householder appeal record.
| Householder appeals determined2021–2026 | 352 |
|---|---|
| Allowed | 175 |
| Allowedof 352 · England 36% | 50% |
Source: Planning Inspectorate appeals casework. Open Government Licence v3.0 Extracted 2026-09-22.
Conservation areas and Article 4 directions — London Borough of Hounslow
Register counts for London Borough of Hounslow. A count describes what the council has published, never a rank against another council.
| Conservation areas in the register28 dated, 1968–2014 | 43 |
|---|---|
| Article 4 directions in the register | 3 |
| Areas covered by an Article 4 direction | 3 |
Source: MHCLG Planning Data Platform. Open Government Licence v3.0 Extracted 2026-09-22.
What TW5 is built of
Residential building form across Cranford (TW5), from 265 classified buildings — the fact that decides party walls, side returns and loft headroom before any policy does.
| Attached on more than one side | 42% |
|---|---|
| Attached on one side | 54% |
| Detached | 5% |
| Median building footprint | 74 m² |
| Addresses per buildingAbove about 2 means flats and maisonettes dominate | 1.47 |
| Buildings classified | 265 |
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 Cranford 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 Hounslow’s checklist and submit on your behalf.
- Council: 8-week targetHouseholder applications carry an 8-week statutory target. London Borough of Hounslow decided 97% of 404 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.
Streets and neighbourhoods in TW5
Nearby postcode districts
Cranford (TW5) — FAQs
Can I do a hip-to-gable loft conversion on a Cranford semi?+
Does aircraft noise change what I can build?+
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