Architectural drawings in HA1

Where in HA1 does a drawing package actually get determined?

Every HA1 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. HA1 fees below are the statutory England rates for 2026, not drawing package estimates.

What changes about a drawing package in each part of HA1?

Roof pitch, wall build-up and plot depth change every few HA1 streets, and each one changes what a drawing package can achieve at that address.

• Inside HA1: Harrow on the Hill (HA1) — Georgian and Victorian conservation hilltop defines Harrow on the Hill, where georgian and victorian houses, listed buildings set what a drawing package can do. Any Harrow on the Hill drawing package is validated by Harrow Council, with Harrow School the usual Harrow on the Hill reference point on the site plan.
• Bordering HA1: Pinner (HA5) — drawing package work in Pinner means tudor fragments, edwardian villas, 1930s semi-detached. Pinner is Tudor and 1930s village. Harrow Council decides the Pinner application, and Pinner High Street anchors the Pinner location plan.
• Bordering HA1: Stanmore (HA7) — 1930s semi-detached, Green Belt fringe defines Stanmore, where 1930s semi-detached, edwardian villas set what a drawing package can do. Any Stanmore drawing package is validated by Harrow Council, with Stanmore Tube the usual Stanmore reference point on the site plan.
• Bordering HA1: Harrow Weald (HA3) — drawing package work in Harrow Weald means 1930s semi-detached. Harrow Weald is 1930s semi-detached, Green Belt. Harrow Council decides the Harrow Weald application, and Harrow Weald Common anchors the Harrow Weald location plan.
• Bordering HA1: Kenton (HA3) — drawing package work in Kenton means 1930s semi-detached. Kenton is 1930s semi-detached. Harrow Council decides the Kenton application, and Kenton station anchors the Kenton location plan.
• Bordering HA1: Wealdstone (HA3) — 1930s semi-detached, post-war defines Wealdstone, where 1930s semi-detached, post-war flats set what a drawing package can do. Any Wealdstone drawing package is validated by Harrow Council, with Wealdstone High Street the usual Wealdstone reference point on the site plan.
• Bordering HA1: North Harrow (HA2) — 1930s semi-detached defines North Harrow, where 1930s semi-detached set what a drawing package can do. Any North Harrow drawing package is validated by Harrow Council, with North Harrow Tube the usual North Harrow reference point on the site plan.
• Bordering HA1: South Harrow (HA2) — drawing package work in South Harrow means 1930s semi-detached. South Harrow is 1930s semi-detached. Harrow Council decides the South Harrow application, and South Harrow Tube anchors the South Harrow location plan.

How do conservation areas and Article 4 affect a drawing package in HA1?

HA1 (Harrow / Harrow on the Hill) conservation designations: there are 29 across Harrow Council, Harrow Weald, Harrow on the Hill, Pinner Village among them. Designation costs a HA1 (Harrow / Harrow on the Hill) owner the permitted-development route: a drawing package then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Stanmore is the HA1 (Harrow / Harrow on the Hill) designation that most often changes a drawing package design.

Article 4 and your HA1 (Harrow / Harrow on the Hill) drawing package: Harrow Council has made no borough-wide direction, so permitted development for a drawing package in HA1 (Harrow / Harrow on the Hill) generally survives outside HA1 (Harrow / Harrow on the Hill) conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a HA1 owner records that a drawing package was lawful.

What HA1 (Harrow / Harrow on the Hill) is built from: 1930s semi-detached dominates; Edwardian villas in Harrow on the Hill and Pinner; Metropolitan Green Belt in Stanmore and Harrow Weald; post-war flats around Harrow Central. Outer north-west London suburban; Harrow on the Hill has exceptionally strict heritage controls; rest of borough permissive. That mix decides the drawing package route in HA1 (Harrow / Harrow on the Hill) more than the postcode does, and it is what a Harrow Council case officer reads first. A householder application costs £548 paid to Harrow Council direct, with 8 weeks to a decision once validated.

What happens if a HA1 property sits on a boundary?

• Hillingdon — cross the HA1 (Harrow / Harrow on the Hill) 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 HA1 (Harrow / Harrow on the Hill) edge because Hillingdon policy and Harrow policy rarely align on drawing package depth.
• Barnet — the Barnet boundary runs against Harrow, so a drawing package a street from HA1 (Harrow / Harrow on the Hill) is decided by Barnet Council instead. Barnet runs 20 conservation areas across N2 and its neighbours, which is why architectural drawings priced for HA1 (Harrow / Harrow on the Hill) are re-checked against Barnet policy whenever the HA1 (Harrow / Harrow on the Hill) address sits on that edge.
• Brent — adjoining HA1 (Harrow / Harrow on the Hill), with 22 conservation areas centred on NW2. A drawing package on the far side of the HA1 (Harrow / Harrow on the Hill) line is determined by Brent Council, so the HA1 (Harrow / Harrow on the Hill) quote for architectural drawings is checked against Brent guidance before it is issued.

Sources for this HA1 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.