Architectural drawings in TW7

Which TW7 postcodes does this drawing package service cover?

Every TW7 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. TW7 fees below are the statutory England rates for 2026, not drawing package estimates.

How does a drawing package differ street by street across TW7?

Roof pitch, wall build-up and plot depth change every few TW7 streets, and each one changes what a drawing package can achieve at that address.

• Inside TW7: Isleworth (TW7) — drawing package work in Isleworth means georgian and victorian terraces. Isleworth is Georgian and Victorian terraces. Hounslow Council decides the Isleworth application, and Old Isleworth anchors the Isleworth location plan.
• Bordering TW7: 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 TW7: Brentford (TW8) — drawing package work in Brentford means georgian fragments, victorian terraces, new-build. Brentford is Georgian fragments, riverside new-build. Hounslow Council decides the Brentford application, and Kew Bridge anchors the Brentford location plan.
• Bordering TW7: 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 TW7: Feltham (TW13) — a drawing package in Feltham starts from 1930s semi-detached, post-war estates, and Feltham reads as 1930s semi-detached, post-war estates. in TW13. Hounslow Council assesses Feltham architectural drawings against its own Feltham character guidance, and the location plan we draw for Feltham references Feltham station.
• Bordering TW7: 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 TW7: Turnham Green (W4) — a drawing package in Turnham Green starts from edwardian villas, and Turnham Green reads as Edwardian villas, conservation. in W4. Hounslow Council assesses Turnham Green architectural drawings against its own Turnham Green character guidance, and the location plan we draw for Turnham Green references Turnham Green.

What local planning policy applies to a drawing package in TW7?

Conservation areas covering TW7 (Isleworth): Hounslow Council runs 30, and Bedford Park, Old Isleworth, Brentford are the ones TW7 (Isleworth) owners meet most. A drawing package inside a TW7 (Isleworth) conservation area loses permitted development, so the TW7 (Isleworth) 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.

Article 4 and your TW7 (Isleworth) drawing package: Hounslow Council has made no borough-wide direction, so permitted development for a drawing package in TW7 (Isleworth) generally survives outside TW7 (Isleworth) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a TW7 owner records that a drawing package was lawful.

What TW7 (Isleworth) 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 TW7 (Isleworth) 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.

Who decides a drawing package on the edge of TW7?

• Hillingdon — adjoining TW7 (Isleworth), with 29 conservation areas centred on HA4. A drawing package on the far side of the TW7 (Isleworth) line is determined by Hillingdon Council, so the TW7 (Isleworth) quote for architectural drawings is checked against Hillingdon guidance before it is issued.
• Ealing — adjoining TW7 (Isleworth), with 30 conservation areas centred on W3. A drawing package on the far side of the TW7 (Isleworth) line is determined by Ealing Council, so the TW7 (Isleworth) quote for architectural drawings is checked against Ealing guidance before it is issued.
• Hammersmith and Fulham — adjoining TW7 (Isleworth), with 45 conservation areas centred on W6. A drawing package on the far side of the TW7 (Isleworth) line is determined by Hammersmith & Fulham Council, so the TW7 (Isleworth) quote for architectural drawings is checked against Hammersmith and Fulham guidance before it is issued.
• Richmond upon Thames — the Richmond upon Thames boundary runs against Hounslow, so a drawing package a street from TW7 (Isleworth) 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 TW7 (Isleworth) are re-checked against Richmond upon Thames policy whenever the TW7 (Isleworth) address sits on that edge.

Sources for this TW7 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.