Land by postcode · HA area · HA1
What the open records say about the HA1 postcode district in Greater London: recent sales, planning designations and controls, and the council that decides applications. District-level facts to read before you sell or develop a plot in Harrow.
Residential sales recorded by HM Land Registry between 2024-08 and 2026-07. This is market context for the district, 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
574
Median sale price
£434,000
Median £ per m² of floor area
£6,653
Median, last 12m vs prior 12m
-4.5%
£440,000 → £420,000
Mix of sales: 6% detached, 14% semi-detached, 15% terraced, 65% flats.
New-build sales 2023–2024: 194 of 731 (27%). 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 960 live postcodes in HA1 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
121 of 960 postcodes
Sudbury Hill Conservation Area Harrow on the Hill · Harrow on the Hill Village Conservation Area · Roxborough Park and The Grove Conservation Area · Harrow School Conservation Area Harrow on the Hill · Mount Park Estate Conservation Area Harrow on the and 3 more
32 of 960 postcodes
2 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in HA1 fall inside: Green Belt, 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.
None of these designations covers more than a small share of postcodes in HA1. What can be built on a given plot is decided by the local plan, settlement boundaries and site-specific matters such as access, flood risk and neighbours, none of which this page measures.
These are district-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 HA1 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. 85 decided since 2021, 52 refused, typically 72 days to a decision.
20 of 85
approved, 24%
47% across London
43 homes approved of 198 applied for
Approved examples
12 Walton Road, Harrow (2 new homes)
Conversion of dwellinghouse into two flats (2 x 1 Bed); Canopy over front entrance; External alterations; Separate amenity space; Refuse and...
Approved 2021-06-02, Harrow ref P/0204/21
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
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
By the kind of plot, from the wording of each proposal:
10 decided since 2021, 5 refused, typically 73 days to a decision
5 of 10
approved, 50%
41% across London
Approved examples
12 Walton Road, Harrow
Conversion of dwellinghouse into two flats (2 x 1 Bed); Canopy over front entrance; External alterations; Separate amenity space; Refuse and...
Approved 2021-06-02, Harrow ref P/0204/21
93 Headstone Road, Harrow
Conversion of dwelling into two flats (1 X 2 bed and 1 X 3 bed); bin and cycle stores
Approved 2022-03-01, Harrow ref P/2734/21
46A Hindes Road, Harrow
Conversion of dwelling into three flats (2 X 2 bed and 1 X 1 bed); separate amenity space; bin and cycle stores
Approved 2023-07-25, Harrow ref P/4602/21
14 decided since 2021, 10 refused, typically 77 days to a decision
4 of 14
approved, 29%
43% across London
Approved examples
231 Watford Road, Harrow
Demolition of the existing building and the erection of building of up to five storeys to provide residential dwellings (Use Class C3); car ...
Approved 2024-03-06, Brent ref 22/3260
Kings Snooker Club, 342 Station Road
Outline application for access, appearance, layout and scale only: Creation of second and third floors comprising of nine flats (2 X 3 bed a...
Approved 2022-12-07, Harrow ref P/1111/21
CIVIC CENTRE CAR PARKS Milton Road, Harrow
Development of apartment building comprising residential units (use class C3) and flexible non residential use to ground floor (Use Class E ...
Approved 2022-03-30, Harrow ref P/4477/21
4 decided since 2021, 3 refused, typically 74 days to a decision
1 of 4
approved
45% across London
Approved examples
16 Westmorland Road, Harrow
Conversion of detached garage in rear garden for use as annexe ancillary to dwelling; external alterations
Approved 2023-03-28, Harrow ref P/4257/22
Also decided here: 3 applications for outbuildings, annexes or garden buildings, 1 approved, typically 56 days.
Decided planning applications (not extensions, conditions or tree works) in this postcode district from the councils' own registers, classified by the wording of each proposal. Counts, not estimates; where a class has fewer than three applications it is not shown.
Harrow covers 95% of the sampled postcodes in HA1.
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 district average. In HA1, 0% of postcodes are in the Green Belt, 13% in a conservation area. 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. A plot on the edge of a village or town with access has the best chance; an open field outside the settlement boundary rarely gets consent for housing whatever the market is doing.
Often, yes. 3% of postcodes in HA1 are under an Article 4 direction (2 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 HA1 the median sale is £434,000, and 27% of 2023–2024 sales were new-build homes, so builders are active 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 district 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 HA1 would be measured against a £434,000 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.
Three places: Harrow's local plan and its policies map for the settlement boundary and allocations, the council's planning register for what has been approved or refused on neighbouring land, and planning.data.gov.uk for the national designations. That is an evening's work if you know what you are looking for. The alternative is to draw your boundary on this site: an architect checks it against the same records and writes back within 48 hours with a plain answer, free and without obligation.
Computed from open-data records; district-level, not plot-level measurements. 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), retrieved 2026-09-05; conservation areas and Article 4 directions are made locally and published on that national register. Postcode centroids: OS Code-Point Open 2026.3.0, contains OS data © Crown copyright and database right 2026. Place name is the most common post town in the sales records. Figures computed 2026-09-06.