Architectural drawings in HA3

Which HA3 postcodes does this drawing package service cover?

Every HA3 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. HA3 fees below are the statutory England rates for 2026, not drawing package estimates.

Which HA3 neighbourhoods suit a drawing package best?

Roof pitch, wall build-up and plot depth change every few HA3 streets, and each one changes what a drawing package can achieve at that address.

• Inside HA3: Harrow Weald (HA3) — 1930s semi-detached, Green Belt defines Harrow Weald, where 1930s semi-detached set what a drawing package can do. Any Harrow Weald drawing package is validated by Harrow Council, with Harrow Weald Common the usual Harrow Weald reference point on the site plan.
• Inside HA3: Kenton (HA3) — a drawing package in Kenton starts from 1930s semi-detached, and Kenton reads as 1930s semi-detached. in HA3. Harrow Council assesses Kenton architectural drawings against its own Kenton character guidance, and the location plan we draw for Kenton references Kenton station.
• Inside HA3: 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 HA3: 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 HA3: Pinner (HA5) — a drawing package in Pinner starts from tudor fragments, edwardian villas, 1930s semi-detached, and Pinner reads as Tudor and 1930s village. in HA5. Harrow Council assesses Pinner architectural drawings against its own Pinner character guidance, and the location plan we draw for Pinner references Pinner High Street.
• Bordering HA3: 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 HA3: 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 HA3: South Harrow (HA2) — 1930s semi-detached defines South Harrow, where 1930s semi-detached set what a drawing package can do. Any South Harrow drawing package is validated by Harrow Council, with South Harrow Tube the usual South Harrow reference point on the site plan.

What local planning policy applies to a drawing package in HA3?

How designation changes a HA3 (Harrow Weald / Kenton / Wealdstone) drawing package: Harrow Council maintains 29 conservation areas, including Harrow Weald, Harrow on the Hill, Pinner Village. Inside any of them a HA3 (Harrow Weald / Kenton / Wealdstone) drawing package cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Stanmore sets the tone for HA3 (Harrow Weald / Kenton / Wealdstone) casework.

No blanket Article 4 over HA3 (Harrow Weald / Kenton / Wealdstone): Harrow Council has not withdrawn permitted development across HA3 (Harrow Weald / Kenton / Wealdstone), so a drawing package outside a HA3 (Harrow Weald / Kenton / Wealdstone) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a HA3 owner wants on file.

The building fabric around HA3 (Harrow Weald / Kenton / Wealdstone): 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. A drawing package in HA3 (Harrow Weald / Kenton / Wealdstone) 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 Harrow Council.

Which neighbouring authorities border HA3?

• Hillingdon — adjoining HA3 (Harrow Weald / Kenton / Wealdstone), with 29 conservation areas centred on HA4. A drawing package on the far side of the HA3 (Harrow Weald / Kenton / Wealdstone) line is determined by Hillingdon Council, so the HA3 (Harrow Weald / Kenton / Wealdstone) quote for architectural drawings is checked against Hillingdon guidance before it is issued.
• Barnet — adjoining HA3 (Harrow Weald / Kenton / Wealdstone), with 20 conservation areas centred on N2. A drawing package on the far side of the HA3 (Harrow Weald / Kenton / Wealdstone) line is determined by Barnet Council, so the HA3 (Harrow Weald / Kenton / Wealdstone) quote for architectural drawings is checked against Barnet guidance before it is issued.
• Brent — adjoining HA3 (Harrow Weald / Kenton / Wealdstone), with 22 conservation areas centred on NW2. A drawing package on the far side of the HA3 (Harrow Weald / Kenton / Wealdstone) line is determined by Brent Council, so the HA3 (Harrow Weald / Kenton / Wealdstone) quote for architectural drawings is checked against Brent guidance before it is issued.

Sources for this HA3 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.