Architectural drawings in TW3

Where in TW3 does a drawing package actually get determined?

Every TW3 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. TW3 fees below are the statutory England rates for 2026, not drawing package estimates.

How does a drawing package differ street by street across TW3?

Roof pitch, wall build-up and plot depth change every few TW3 streets, and each one changes what a drawing package can achieve at that address.

• Inside TW3: Hounslow (TW3) — 1930s semi-detached, post-war flats defines Hounslow, where 1930s semi-detached, post-war flats set what a drawing package can do. Any Hounslow drawing package is validated by Hounslow Council, with Hounslow Central the usual Hounslow reference point on the site plan.
• Bordering TW3: Chiswick (W4) — a drawing package in Chiswick starts from edwardian villas, victorian terraces, and Chiswick reads as Edwardian villas, conservation. in W4. Hounslow Council assesses Chiswick architectural drawings against its own Chiswick character guidance, and the location plan we draw for Chiswick references Chiswick House.
• Bordering TW3: Brentford (TW8) — a drawing package in Brentford starts from georgian fragments, victorian terraces, new-build, and Brentford reads as Georgian fragments, riverside new-build. in TW8. Hounslow Council assesses Brentford architectural drawings against its own Brentford character guidance, and the location plan we draw for Brentford references Kew Bridge.
• Bordering TW3: Isleworth (TW7) — a drawing package in Isleworth starts from georgian and victorian terraces, and Isleworth reads as Georgian and Victorian terraces. in TW7. Hounslow Council assesses Isleworth architectural drawings against its own Isleworth character guidance, and the location plan we draw for Isleworth references Old Isleworth.
• Bordering TW3: Feltham (TW13) — 1930s semi-detached, post-war estates defines Feltham, where 1930s semi-detached, post-war estates set what a drawing package can do. Any Feltham drawing package is validated by Hounslow Council, with Feltham station the usual Feltham reference point on the site plan.
• Bordering TW3: Hanworth (TW13) — drawing package work in Hanworth means 1930s semi-detached. Hanworth is 1930s semi-detached. Hounslow Council decides the Hanworth application, and Hanworth Park anchors the Hanworth location plan.
• Bordering TW3: Turnham Green (W4) — Edwardian villas, conservation defines Turnham Green, where edwardian villas set what a drawing package can do. Any Turnham Green drawing package is validated by Hounslow Council, with Turnham Green the usual Turnham Green reference point on the site plan.

What local planning policy applies to a drawing package in TW3?

Conservation areas covering TW3 (Hounslow): Hounslow Council runs 30, and Chiswick, Bedford Park, Old Isleworth are the ones TW3 (Hounslow) owners meet most. A drawing package inside a TW3 (Hounslow) conservation area loses permitted development, so the TW3 (Hounslow) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Chiswick a drawing package is judged on the street elevation first.

No blanket Article 4 over TW3 (Hounslow): Hounslow Council has not withdrawn permitted development across TW3 (Hounslow), so a drawing package outside a TW3 (Hounslow) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a TW3 owner wants on file.

What TW3 (Hounslow) is built from: Edwardian villas in Chiswick and Turnham Green; Georgian in Isleworth; 1930s semi-detached in Hounslow and Feltham; riverside new-build in Brentford. Chiswick is one of west London's most conservation-controlled areas; outer Hounslow is permissive suburban. That mix decides the drawing package route in TW3 (Hounslow) more than the postcode does, and it is what a Hounslow Council case officer reads first. A householder application costs £548 paid to Hounslow Council direct, with 8 weeks to a decision once validated.

Which neighbouring authorities border TW3?

• Hillingdon — cross the TW3 (Hounslow) boundary and Hillingdon Council takes the drawing package instead, applying 29 conservation areas of its own around HA4. We re-price architectural drawings at the TW3 (Hounslow) edge because Hillingdon policy and Hounslow policy rarely align on drawing package depth.
• Ealing — the Ealing boundary runs against Hounslow, so a drawing package a street from TW3 (Hounslow) is decided by Ealing Council instead. Ealing runs 30 conservation areas across W3 and its neighbours, which is why architectural drawings priced for TW3 (Hounslow) are re-checked against Ealing policy whenever the TW3 (Hounslow) address sits on that edge.
• Hammersmith and Fulham — the Hammersmith and Fulham boundary runs against Hounslow, so a drawing package a street from TW3 (Hounslow) is decided by Hammersmith & Fulham Council instead. Hammersmith and Fulham runs 45 conservation areas across W6 and its neighbours, which is why architectural drawings priced for TW3 (Hounslow) are re-checked against Hammersmith and Fulham policy whenever the TW3 (Hounslow) address sits on that edge.
• Richmond upon Thames — the Richmond upon Thames boundary runs against Hounslow, so a drawing package a street from TW3 (Hounslow) is decided by Richmond Council instead. Richmond upon Thames runs 72 conservation areas across SW13 and its neighbours, which is why architectural drawings priced for TW3 (Hounslow) are re-checked against Richmond upon Thames policy whenever the TW3 (Hounslow) address sits on that edge.

Sources for this TW3 drawing package page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.