Rear Dormer Loft Conversion Drawings in North Harrow (HA2)

Which HA2 postcodes does this rear dormer service cover?

Every HA2 postcode district we draw in, the stock that dominates it and the authority that validates a rear dormer there. HA2 fees below are the statutory England rates for 2026, not rear dormer estimates.

What changes about a rear dormer in each part of HA2?

Roof pitch, wall build-up and plot depth change every few HA2 streets, and each one changes what a rear dormer can achieve at that address.

• Inside HA2: North Harrow (HA2) — rear dormer work in North Harrow means 1930s semi-detached. North Harrow is 1930s semi-detached. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis throughout HA2. Harrow Council decides the North Harrow application, and North Harrow Tube anchors the North Harrow location plan.
• Inside HA2: South Harrow (HA2) — a rear dormer in South Harrow starts from 1930s semi-detached, and South Harrow reads as 1930s semi-detached. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis in HA2. Harrow Council assesses South Harrow rear dormers against its own South Harrow character guidance, and the location plan we draw for South Harrow references South Harrow Tube.
• Bordering HA2: Harrow on the Hill (HA1) — a rear dormer in Harrow on the Hill starts from georgian and victorian houses, listed buildings, and Harrow on the Hill reads as Georgian and Victorian conservation hilltop. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent in HA1. Harrow Council assesses Harrow on the Hill rear dormers against its own Harrow on the Hill character guidance, and the location plan we draw for Harrow on the Hill references Harrow School.
• Bordering HA2: Pinner (HA5) — Tudor and 1930s village defines Pinner, where tudor fragments, edwardian villas, 1930s semi-detached set what a rear dormer can do. The deeper Edwardian rear slope takes a full-width dormer without breaching the 40 m³ or 50 m³ volume limits on most of these houses across HA5. Any Pinner rear dormer is validated by Harrow Council, with Pinner High Street the usual Pinner reference point on the site plan.
• Bordering HA2: Stanmore (HA7) — rear dormer work in Stanmore means 1930s semi-detached, edwardian villas. Stanmore is 1930s semi-detached, Green Belt fringe. The deeper Edwardian rear slope takes a full-width dormer without breaching the 40 m³ or 50 m³ volume limits on most of these houses throughout HA7. Harrow Council decides the Stanmore application, and Stanmore Tube anchors the Stanmore location plan.
• Bordering HA2: Harrow Weald (HA3) — 1930s semi-detached, Green Belt defines Harrow Weald, where 1930s semi-detached set what a rear dormer can do. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis across HA3. Any Harrow Weald rear dormer is validated by Harrow Council, with Harrow Weald Common the usual Harrow Weald reference point on the site plan.
• Bordering HA2: Kenton (HA3) — 1930s semi-detached defines Kenton, where 1930s semi-detached set what a rear dormer can do. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis across HA3. Any Kenton rear dormer is validated by Harrow Council, with Kenton station the usual Kenton reference point on the site plan.
• Bordering HA2: Wealdstone (HA3) — rear dormer work in Wealdstone means 1930s semi-detached, post-war flats. Wealdstone is 1930s semi-detached, post-war. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis throughout HA3. Harrow Council decides the Wealdstone application, and Wealdstone High Street anchors the Wealdstone location plan.

Does HA2 planning policy restrict a rear dormer?

Conservation areas covering HA2 (North Harrow / South Harrow): Harrow Council runs 29, and Harrow on the Hill, Pinner Village, Stanmore are the ones HA2 (North Harrow / South Harrow) owners meet most. A rear dormer inside a HA2 (North Harrow / South Harrow) conservation area loses permitted development, so the HA2 (North Harrow / South Harrow) submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Harrow Weald a rear dormer is judged on the street elevation first.

HA2 (North Harrow / South Harrow) permitted development status: there is no borough-wide direction from Harrow Council, so a rear dormer at a HA2 address is normally still permitted development. We certify that with a £274 Lawful Development Certificate rather than leaving a HA2 (North Harrow / South Harrow) sale to argue it later.

What HA2 (North Harrow / South Harrow) 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 rear dormer route in HA2 (North Harrow / South Harrow) 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.

Who decides a rear dormer on the edge of HA2?

• Hillingdon — the Hillingdon boundary runs against Harrow, so a rear dormer a street from HA2 (North Harrow / South Harrow) is decided by Hillingdon Council instead. Hillingdon runs 29 conservation areas across HA4 and its neighbours, which is why rear dormers priced for HA2 (North Harrow / South Harrow) are re-checked against Hillingdon policy whenever the HA2 (North Harrow / South Harrow) address sits on that edge.
• Barnet — cross the HA2 (North Harrow / South Harrow) boundary and Barnet Council takes the rear dormer instead, applying 20 conservation areas of its own around N2. We re-price rear dormers at the HA2 (North Harrow / South Harrow) edge because Barnet policy and Harrow policy rarely align on rear dormer depth.
• Brent — adjoining HA2 (North Harrow / South Harrow), with 22 conservation areas centred on NW2. A rear dormer on the far side of the HA2 (North Harrow / South Harrow) line is determined by Brent Council, so the HA2 (North Harrow / South Harrow) quote for rear dormers is checked against Brent guidance before it is issued.

Sources for this HA2 rear dormer 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.