North Harrow / South Harrow — covered by Harrow Council.
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Loft conversion drawings delivered by an MCIAT chartered team.
House extension drawings delivered by an MCIAT chartered team.
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Basement conversion drawings delivered by an MCIAT chartered team.
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Measured building survey delivered by an MCIAT chartered team.
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HA2 primarily covers North Harrow / South Harrow in Harrow.
Decisions for HA2 are made by Harrow Council. Standard Permitted Development rules apply for most rear extensions and loft conversions on terraced and semi-detached houses, unless the property is in a conservation area, is listed, or sits under an Article 4 Direction. Article 4 in Harrow: No.
Building regs from £950. We do not charge hourly. Free site survey across all HA2 addresses.
From first call to planning decision: typically 12–14 weeks. Site survey week 1, design weeks 2–3, validation 1–2 weeks, statutory 8-week determination. Harrow Council timelines align with the national norm.
North Harrow / South Harrow in HA2 is characterised by the housing stock of Harrow — broadly 1930s semi-detached dominates.

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Every HA2 postcode district we draw in, the stock that dominates it and the authority that validates a drawing package there. HA2 fees below are the statutory England rates for 2026, not drawing package estimates.
| Postcode | Area | Dominant stock | What it means for a drawing package |
|---|---|---|---|
| HA2 | North Harrow / South Harrow | 1930s semi-detached | A drawing package at an HA2 address in North Harrow / South Harrow is determined by Harrow Council under its own Local Plan policies for North Harrow / South Harrow. |
| HA2 | North Harrow | 1930s semi-detached | North Harrow sits inside HA2; drawing package proposals here are determined by Harrow Council. |
| HA2 | South Harrow | 1930s semi-detached | South Harrow sits inside HA2; drawing package proposals here are determined by Harrow Council. |
| HA1 | Harrow / Harrow on the Hill | Georgian and Victorian houses, listed buildings | Adjoining district to HA2, also inside Harrow for drawing package purposes. |
| HA3 | Harrow Weald / Kenton / Wealdstone | 1930s semi-detached | Adjoining district to HA2, also inside Harrow for drawing package purposes. |
| HA7 | Stanmore | 1930s semi-detached, Edwardian villas | Adjoining district to HA2, also inside Harrow for drawing package purposes. |
Roof pitch, wall build-up and plot depth change every few HA2 streets, and each one changes what a drawing package can achieve at that address.
How designation changes a HA2 (North Harrow / South Harrow) drawing package: Harrow Council maintains 29 conservation areas, including Pinner Village, Stanmore, Harrow Weald. Inside any of them a HA2 (North Harrow / South Harrow) 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 HA2 (North Harrow / South Harrow) casework.
No blanket Article 4 over HA2 (North Harrow / South Harrow): Harrow Council has not withdrawn permitted development across HA2 (North Harrow / South Harrow), so a drawing package outside a HA2 (North Harrow / South Harrow) conservation area usually keeps it. The £274 Lawful Development Certificate is still the document a HA2 owner wants on file.
The building fabric around HA2 (North Harrow / South 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 drawing package in HA2 (North Harrow / South Harrow) 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.
Sources for this HA2 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.
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