Land by postcode · HA area · Harrow
Harrow covers three postcode districts, HA1, HA2 and HA3, in Greater London. Planning applications here are decided mostly by the Harrow planning authority, with Brent covering the rest. Below: what homes sold for, which planning controls apply, and what that means before you sell or develop a plot in Harrow.
Residential sales recorded by HM Land Registry between 2024-08 and 2026-07 across all three of Harrow's postcode districts. This is market context for the town, not a land valuation: what a plot is worth depends on what can be built on it, which these figures do not show.
Sales in 24 months
1,821
Median sale price
£511,000
Median £ per m² of floor area
£6,667
Median, last 12m vs prior 12m
+3%
£505,000 → £520,250
Mix of sales: 5% detached, 31% semi-detached, 26% terraced, 38% flats.
New-build sales 2023–2024: 213 of 2,061 (10%). A rough proxy for recent building activity: these are homes sold by builders, not development sites.
For each designation on the planning.data.gov.uk register, the share of the 3,188 live postcodes in Harrow's three districts whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
23 of 3,188 postcodes
Mostly in HA3 and HA2: 19 of HA3's 1,262 postcodes and 4 of HA2's 966 postcodes.
221 of 3,188 postcodes
Harrow on the Hill Village Conservation Area · Sudbury Hill Conservation Area Harrow on the Hill · Roxeth Hill Conservation Area Harrow on the Hill · Northwick Circle · Mount Stewart and 9 more
320 of 3,188 postcodes
6 separate directions recorded, each removing particular permitted development rights within a defined area. The largest named one is the Article 4 for HMOs.
No postcodes in Harrow's three districts fall inside: National Landscape (AONB), National Park.
Flood zones, tree preservation orders, local plan allocations, settlement boundaries and non-designated heritage are not included here and are checked in a full assessment.
1% of postcodes in Harrow are inside the Green Belt, so Harrow has land both inside and outside it. The Green Belt postcodes sit mostly in HA3 and HA2. Which side of the boundary a plot sits on determines whether the Green Belt tests apply to it at all.
These are town-level facts. The free assessment checks your actual boundary against the same registers and the local plan and tells you plainly what they mean for your plot.
Decided planning applications in Harrow since 2021, from the council registers, grouped by the kind of scheme a landowner might be weighing up. Extensions, conditions and tree works are left out. Counts, not estimates.
Taken from the units table on the planning form itself, so this is homes actually created, not a reading of the description. 310 decided since 2021, 170 refused.
95 of 310
approved, 31%
48% across London
216 homes approved of 724 applied for
Approved examples
57 High Street, Harrow Hill (2 new homes)
Conversion of dwelling into two flats (2 X 3 bed)
Approved 2024-05-14, Harrow ref PL/0406/24
23 Flambard Road, Kenton (3 new homes)
Redevelopment to provide three X two storey dwelling houses with habitable roofspaces (3 X 5 bed); parking; landscaping; bin and cycle store...
Approved 2023-09-15, Harrow ref P/2144/23
163 Preston Hill, Harrow (6 new homes)
Demolition of existing dwelling and erection of 3 storey building to accommodate 6 self-contained flats creation of a new vehicle crossover ...
Approved 2023-05-16, Brent ref 22/1971
By the kind of plot, from the wording of each proposal:
66 decided since 2021, 28 refused
28 of 66
approved, 42%
42% across London
Approved examples
14 Preston Waye, Harrow
Erection of two-storey detached dwellinghouse, subdivision of garden with boundary treatment, associated landscaping, off-street parking spa...
Approved 2024-07-03, Brent ref 24/1253
38 decided since 2021, 17 refused
15 of 38
approved, 39%
45% across London
Approved examples
Grange Farm Estate, South Harrow
Phase 2a (Full planning permission) to include the construction of new dwellings to provide residential homes (Use Class C3), along with cyc...
Approved 2025-12-18, Harrow ref PL/0915/25
9 decided since 2021, 3 refused
4 of 9
approved, 44%
51% across London
Approved examples
12 Robin Grove, Harrow
Substantial demolition of existing dwellinghouse and erection of a new dwellinghouse
Approved 2026-03-20, Brent ref 25/3499
17 decided since 2021, 9 refused
6 of 17
approved, 35%
46% across London
Approved examples
27 Roxeth Green Avenue, South Harrow
Conversion of outbuilding at rear to granny annexe ancillary to the main dwelling, External alterations
Approved 2025-10-30, Harrow ref PL/1419/25
Also decided here: 67 applications for outbuildings, annexes or garden buildings, 44 approved.
Decided planning applications (not extensions, conditions or tree works) from the councils' own registers, summed across the 3 of 3 postcode districts in Harrow that carry them, classified by the wording of each proposal. Counts, not estimates; within a district, a class with fewer than three applications is not counted.
Harrow's three districts are split between planning authorities: Harrow (89% of sampled postcodes), Brent (9%).
Borough guides: Selling land in Harrow · Selling land in Brent
Draw your boundary, tell us what you own, and an architect checks it against these registers and the local plan. Free, no obligation, and you get a straight written answer.
It depends on where the plot sits, not on the town average. Across Harrow, 1% of postcodes are in the Green Belt and 7% in a conservation area. Green Belt land is concentrated in HA3 and HA2; on Green Belt or National Landscape plots a new home is the exception and needs a specific case, and a replacement dwelling, a conversion or a modest extension is usually the realistic route. Outside those designations the questions that decide it are whether the plot is inside or adjoining the settlement boundary in the local plan, whether it has its own road access, and what is next to it.
Often, yes. 10% of postcodes in Harrow are under an Article 4 direction (6 separate directions), which withdraws particular permitted development rights, so an outbuilding, extension or change of use that is automatic elsewhere needs an application there. Outside those areas, permitted development applies to houses and their gardens but not to agricultural land or paddocks, where a new building or a new use normally needs permission or prior approval.
Developers look at three things before they talk about price: whether the plot is outside the Green Belt and any National Landscape, whether it sits inside or beside the settlement boundary, and what finished homes sell for. In Harrow the median sale is £511,000, from £434,000 in HA1 to £550,000 in HA3, and only 10% of 2023–2024 sales were new-build homes, so builders have been quiet here. A single plot usually goes to a local builder or a self-builder; a site for five or more homes attracts regional housebuilders, normally through an option or a conditional contract rather than an outright purchase, so the price you see quoted is not the price you receive.
There is no town figure for land, because a plot's value comes from what can be built on it, not from where it is. As a guide, a serviced plot with consent for one house commonly sells for around a third of the finished house value, which in Harrow would be measured against a £511,000 median sale. The same plot without consent, or inside the Green Belt, is worth a small fraction of that, and a paddock with no realistic route to consent is worth agricultural or amenity value only. The free check tells you which of those your plot is before you talk to anyone about a price.
Computed from open-data records; town-level, not plot-level measurements. Harrow here means the three postcode districts whose most common post town is Harrow. Sales: HM Land Registry Price Paid Data (2024-08-01 to 2026-07-31), © Crown copyright, Open Government Licence. Designations: planning.data.gov.uk (OGL); conservation areas and Article 4 directions are made locally and published on that national register. Postcode centroids: OS Code-Point Open, contains OS data © Crown copyright and database right 2026. Figures computed 2026-10-19.