Architectural drawings in HA4

Which HA4 postcodes does this drawing package service cover?

Every HA4 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. HA4 fees below are the statutory England rates for 2026, not drawing package estimates.

How does a drawing package differ street by street across HA4?

Roof pitch, wall build-up and plot depth change every few HA4 streets, and each one changes what a drawing package can achieve at that address.

• Inside HA4: Ruislip (HA4) — a drawing package in Ruislip starts from 1930s semi-detached, tudor cottages, and Ruislip reads as 1930s semi-detached, Tudor fragments. in HA4. Hillingdon Council assesses Ruislip architectural drawings against its own Ruislip character guidance, and the location plan we draw for Ruislip references Ruislip Lido.
• Bordering HA4: Uxbridge (UB8) — a drawing package in Uxbridge starts from georgian fragments, 1930s semi-detached, post-war flats, and Uxbridge reads as Georgian centre, 1930s residential. in UB8. Hillingdon Council assesses Uxbridge architectural drawings against its own Uxbridge character guidance, and the location plan we draw for Uxbridge references Uxbridge High Street.
• Bordering HA4: Northwood (HA6) — a drawing package in Northwood starts from 1930s detached, edwardian villas, and Northwood reads as 1930s detached and semi-detached. in HA6. Hillingdon Council assesses Northwood architectural drawings against its own Northwood character guidance, and the location plan we draw for Northwood references Northwood Hills.
• Bordering HA4: Hayes (UB3, UB4) — drawing package work in Hayes means 1930s semi-detached, post-war estates. Hayes is 1930s semi-detached, post-war. Hillingdon Council decides the Hayes application, and Hayes & Harlington anchors the Hayes location plan.
• Bordering HA4: West Drayton (UB7) — 1930s semi-detached defines West Drayton, where 1930s semi-detached, post-war set what a drawing package can do. Any West Drayton drawing package is validated by Hillingdon Council, with West Drayton station the usual West Drayton reference point on the site plan.
• Bordering HA4: Ickenham (UB10) — 1930s semi-detached, village conservation defines Ickenham, where 1930s semi-detached, tudor fragments set what a drawing package can do. Any Ickenham drawing package is validated by Hillingdon Council, with Ickenham Village the usual Ickenham reference point on the site plan.
• Bordering HA4: Harefield (UB9) — drawing package work in Harefield means tudor and georgian fragments, 1930s semi-detached. Harefield is village conservation, rural fringe. Hillingdon Council decides the Harefield application, and Harefield Hospital anchors the Harefield location plan.
• Bordering HA4: Yiewsley (UB7) — drawing package work in Yiewsley means 1930s semi-detached. Yiewsley is 1930s semi-detached. Hillingdon Council decides the Yiewsley application, and Yiewsley High Street anchors the Yiewsley location plan.
• Bordering HA4: Eastcote (HA5) — drawing package work in Eastcote means 1930s semi-detached. Eastcote is 1930s semi-detached. Hillingdon Council decides the Eastcote application, and Eastcote Tube anchors the Eastcote location plan.
• Bordering HA4: Hillingdon (UB10) — drawing package work in Hillingdon means 1930s semi-detached. Hillingdon is 1930s semi-detached, post-war. Hillingdon Council decides the Hillingdon application, and Hillingdon Tube anchors the Hillingdon location plan.

How do conservation areas and Article 4 affect a drawing package in HA4?

Conservation areas covering HA4 (Ruislip): Hillingdon Council runs 29, and Ruislip Village, Northwood, Harefield are the ones HA4 (Ruislip) owners meet most. A drawing package inside a HA4 (Ruislip) conservation area loses permitted development, so the HA4 (Ruislip) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Harefield a drawing package is judged on the street elevation first.

HA4 (Ruislip) permitted development status: there is no borough-wide direction from Hillingdon Council, so a drawing package at a HA4 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a HA4 (Ruislip) sale to argue it later.

The building fabric around HA4 (Ruislip): 1930s semi-detached dominates; Metropolitan Green Belt covers much of north Hillingdon; Victorian cottages in Uxbridge and Ruislip villages; post-war housing near Heathrow. Largest outer west London borough; significant Green Belt; Heathrow noise contours affect planning decisions in Harmondsworth and Sipson. A drawing package in HA4 (Ruislip) is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Hillingdon Council.

Which neighbouring authorities border HA4?

• Harrow — cross the HA4 (Ruislip) boundary and Harrow Council takes the drawing package instead, applying 29 conservation areas of its own around HA1. We re-price architectural drawings at the HA4 (Ruislip) edge because Harrow policy and Hillingdon policy rarely align on drawing package depth.
• Ealing — cross the HA4 (Ruislip) boundary and Ealing Council takes the drawing package instead, applying 30 conservation areas of its own around W3. We re-price architectural drawings at the HA4 (Ruislip) edge because Ealing policy and Hillingdon policy rarely align on drawing package depth.
• Hounslow — the Hounslow boundary runs against Hillingdon, so a drawing package a street from HA4 (Ruislip) is decided by Hounslow Council instead. Hounslow runs 30 conservation areas across W3 and its neighbours, which is why architectural drawings priced for HA4 (Ruislip) are re-checked against Hounslow policy whenever the HA4 (Ruislip) address sits on that edge.

Sources for this HA4 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.