House Extension Drawings in Hounslow |

No Article 4 Direction covers Hounslow, which keeps the Hounslow permitted-development route open on unlisted houses. In Hounslow the streetscape argument usually decides the case before the numbers do, because the area is 1930s semi-detached, post-war flats. Hounslow carries 30 conservation areas; if the TW3 address falls in Bedford Park or Old Isleworth, expect the permitted-development route to close and a full Hounslow Council application to be the faster answer. Conservation status is checked against the Hounslow address before design.

The Hounslow Article 4 position is established at survey, before design. A TW3 survey answers most of it — where the 1930s semi-detached allows the rear wall to go. The borough policy layer over every TW3 address is set out on Hounslow planning. The Hounslow survey then carries into building regulations drawings in Hounslow if the project runs on to construction.

One to two weeks at London Borough of Hounslow before a Hounslow case reaches an officer. A Hounslow project opens with an on-site laser survey, which is what makes the later Hounslow Council submission robust against a validation query.

Statutory periods: 8 weeks from validation for a householder application, 13 weeks for a major scheme, 6 weeks for prior approval with a 21 days neighbour consultation, and 5 weeks for a full plans building control submission. A party structure notice requires one month notice and two months where excavation is involved.

Most Hounslow householder cases are decided under delegated powers, not committee. We issue the TW3 drawings numbered and revision-controlled.

Speaking to TW3 neighbours before submission avoids most of it. Levels between front and rear of a Hounslow house are recorded, not assumed.

Because Hounslow houses generally share walls, budget time for party wall notices alongside the TW3 application. Once consent is granted, loft conversion drawings follows for the TW3 property.

Hounslow is characterised by 1930s semi-detached, post-war flats, concentrated across TW3 in the Hounslow area. What the 1930s semi-detached in Hounslow allows is a construction question first and a planning question second, and the survey answers it. Applied to TW3 property: 1930s semis here have the deepest rear gardens in the area, which is why the 6 m and 8 m larger-home prior approval route gets used so often. We resolve it before the Hounslow design is fixed. The prevailing Hounslow eaves line is the reference Hounslow Council uses, which is why the proposed elevation is drawn with the neighbours on it.

A TW3 dig turns on engineering more than on policy. The same Hounslow drawings carry through to architectural drawings for TW3 properties and planning permission.

What the Hounslow drawing pack contains

For a TW3 address the deliverables are fixed, not open-ended.

• existing and proposed ground-floor plans for the Hounslow property
• proposed rear elevation
• long section through the extension
• site and block plans
• party wall position drawing

Streets and landmarks we survey around Hounslow

• Bell Square — shared flank walls, so Bell Square party structure notices go out before work starts.
• Hanworth Park — side returns where the 45-degree amenity test decides how far a Hanworth Park extension goes.
• Norwood Green — front-to-back level changes that drive the Norwood Green section drawings.
• High Street — terraced rear elevations — the High Street party wall position is drawn first.
• Great West Road — frontages visible from the highway, so Bedford Park materials detail governs the Great West Road elevation.
• Hounslow Central — schemes in view of it attract closer officer scrutiny.
• Hounslow Heath — height and massing nearby are argued against this frontage.
• West Middlesex University Hospital — Hounslow Council weighs TW3 sightlines to it in the character assessment.
• Lampton School — proposals within its setting are drawn with the context elevation included.
• Kingsley Academy — Hounslow Council weighs TW3 sightlines to it in the character assessment.

Getting to a Hounslow survey

Surveyors travel to TW3 addresses from the studio; the nearest stations are File:Hounslow, File:Hounslow East, Hounslow East, Hounslow Central. Appointments are booked in Hounslow on weekdays and Saturdays, and the measured survey of a standard 1930s semi-detached takes two to three hours.

Where Hounslow sits

Hounslow lies 4 miles (17.5 km) west-southwest of Charing Cross, on Ordnance Survey grid reference TQ140760, inside the Brentford and Isleworth, Feltham and Heston parliamentary constituency. Those coordinates matter in practice: a site location plan for Hounslow Council must be drawn to a recognised scale over the correct grid square. Source.

Practical detail for a Hounslow submission: File:Hounslow and File:Hounslow East and Hounslow East and Hounslow Central cover the TW3 area; the postal town here is HOUNSLOW; dialling code 020. Site plans are drawn to the address as Hounslow Council holds it.

Hounslow postcode coverage

Districts covered around Hounslow: TW3 (Hounslow), which Hounslow holds on its own.

Streets and stations in Hounslow

Bell Square, Hanworth Park, Norwood Green, High Street and Great West Road are typical of the Hounslow streets we draw. most Hounslow sites are within walking distance of File:Hounslow or File:Hounslow East or Hounslow East.

Areas we cover around Hounslow

Coverage from Hounslow extends to Ham (TW10), Mortlake (SW14), Chiswick (W4), Brentford (TW8), Isleworth (TW7), Feltham (TW13) and into Hammersmith and Fulham.

What moves the number on a Hounslow job is the 1930s semi-detached itself — party walls, level changes, and whether Bedford Park pulls a heritage statement into scope.

Statutory application fees are set by regulation, not by the council: £548 householder, £610 for a new dwelling, £274 for a lawful development certificate, £249 for prior approval.

On a Hounslow submission the statutory element is London Borough of Hounslow's, not ours. London planning approval-rate dataset · Hounslow planning · the London house extension drawings pillar page · house extension drawings in Ham.

Chartered accountability applies to every TW3 drawing we issue. We would rather spend on Hounslow Council advice than lose a Hounslow decision and resubmit.

Drawings are produced by chartered members of the Chartered Institute of Architectural Technologists (MCIAT), the professional body for technical design and building-regulations competence. First-time approval across our London caseload is 98%. Statutory fees shown are those in force in England in 2026 under the Town and Country Planning (Fees for Applications) Regulations. Confirm your local authority at gov.uk and submission requirements on the Planning Portal. Studio: 71–75 Shelton Street, London WC2H 9JQ.

Send us the Hounslow address and we will confirm the route before you commit. This Hounslow page was reviewed in August 2026.