Where in Harrow does a permitted development scheme actually get determined?
District by district: what Harrow's housing stock looks like in each one, which authority validates a scheme there, and the statutory England fees as they stand in 2026. The householder application fee in England is £548. That is what the council charges to determine the application. It is neither a builder's estimate nor our design fee.
| Postcode | Area | Dominant stock | What it means for a permitted development scheme |
|---|
| HA1 | Harrow / Harrow on the Hill | Georgian and Victorian houses, listed buildings | Harrow / Harrow on the Hill sits wholly inside HA1, so Harrow Council validates every permitted development scheme submitted from an HA1 address. |
| HA2 | North Harrow / South Harrow | 1930s semi-detached | North Harrow and South Harrow both sit in HA2, and HA2 sits inside the borough with no overlap, so every permitted development scheme from an HA2 address is validated by Harrow. |
| HA3 | Harrow Weald / Kenton / Wealdstone | 1930s semi-detached | HA3 covers Harrow Weald / Kenton / Wealdstone only; Harrow Council handles the permitted development scheme. |
| HA7 | Stanmore | 1930s semi-detached, Edwardian villas | Stanmore falls wholly inside HA7 and wholly inside Harrow. Nothing about the boundary needs resolving before a scheme goes in. |
| HA5 | Pinner / Eastcote | Tudor fragments, Edwardian villas, 1930s semi-detached | HA5 straddles a boundary: Pinner is Harrow, Eastcote is Hillingdon. Both policies maps get checked against the address first, because the answer decides which council receives the scheme. |
Which Harrow neighbourhoods suit a permitted development scheme best?
Roof pitch, wall build-up and back garden depth shift from street to street across Harrow, and each of the three changes what a permitted development scheme can actually reach at a given address.
- 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 permitted development scheme can do. Applications on Georgian stock here almost always need a heritage statement alongside the drawings across HA1. Any Harrow on the Hill permitted development scheme is validated by Harrow Council, with Harrow School the usual Harrow on the Hill reference point on the site plan.
- Pinner (HA5) — Tudor and 1930s village defines Pinner, where tudor fragments, edwardian villas, 1930s semi-detached set what a permitted development scheme can do. Edwardian houses here typically need the same householder set plus a roof plan where a dormer is proposed across HA5. Any Pinner permitted development scheme is validated by Harrow Council, with Pinner High Street the usual Pinner reference point on the site plan.
- Stanmore (HA7) — a permitted development scheme in Stanmore starts from 1930s semi-detached, edwardian villas, and Stanmore reads as 1930s semi-detached, Green Belt fringe. Edwardian houses here typically need the same householder set plus a roof plan where a dormer is proposed in HA7. Harrow Council assesses Stanmore permitted development schemes against its own Stanmore character guidance, and the location plan we draw for Stanmore references Stanmore Tube.
- Harrow Weald (HA3) — 1930s semi-detached, Green Belt defines Harrow Weald, where 1930s semi-detached set what a permitted development scheme can do. On these 1930s semis the prior approval route often replaces a full application across HA3. Any Harrow Weald permitted development scheme is validated by Harrow Council, with Harrow Weald Common the usual Harrow Weald reference point on the site plan.
- Kenton (HA3) — 1930s semi-detached defines Kenton, where 1930s semi-detached set what a permitted development scheme can do. On these 1930s semis the prior approval route often replaces a full application across HA3. Any Kenton permitted development scheme is validated by Harrow Council, with Kenton station the usual Kenton reference point on the site plan.
- Wealdstone (HA3) — 1930s semi-detached, post-war defines Wealdstone, where 1930s semi-detached, post-war flats set what a permitted development scheme can do. On these 1930s semis the prior approval route often replaces a full application across HA3. Any Wealdstone permitted development scheme is validated by Harrow Council, with Wealdstone High Street the usual Wealdstone reference point on the site plan.
- North Harrow (HA2) — 1930s semi-detached defines North Harrow, where 1930s semi-detached set what a permitted development scheme can do. On these 1930s semis the prior approval route often replaces a full application across HA2. Any North Harrow permitted development scheme is validated by Harrow Council, with North Harrow Tube the usual North Harrow reference point on the site plan.
Does Harrow planning policy restrict a permitted development scheme?
How designation changes a Harrow permitted development scheme: Harrow Council maintains 29 conservation areas, including Stanmore, Harrow Weald, Harrow on the Hill. Inside any of them a Harrow permitted development scheme 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 Harrow casework.
Article 4 and your Harrow permitted development scheme: Harrow Council has made no borough-wide direction, so permitted development for a permitted development scheme in Harrow generally survives outside Harrow conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a HA1 owner records that a permitted development scheme was lawful.
The building fabric around Harrow: 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 permitted development scheme in Harrow is scoped against that stock first.
What happens if a Harrow property sits on a boundary?
- Hillingdon — adjoining Harrow, with 29 conservation areas centred on HA4. A permitted development scheme on the far side of the Harrow line is determined by Hillingdon Council, so the Harrow quote for permitted development schemes is checked against Hillingdon guidance before it is issued.
- Barnet — adjoining Harrow, with 20 conservation areas centred on N2. A permitted development scheme on the far side of the Harrow line is determined by Barnet Council, so the Harrow quote for permitted development schemes is checked against Barnet guidance before it is issued.
- Brent — cross the Harrow boundary and Brent Council takes the permitted development scheme instead, applying 22 conservation areas of its own around NW2. We re-price permitted development schemes at the Harrow edge because Brent policy and Harrow policy rarely align on permitted development scheme depth.
Sources for this Harrow permitted development scheme 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.
