Use this guide to understand HA1 3JJ in Harrow. Start with the interactive location and approximate postcode outline, then browse the available facts and local-area indicators. Labels show which figures relate to the exact postcode and which cover a larger geography. Census 2021 records 51 residents and 25 households at the exact postcode.
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Create a Custom MapCore details from the ONS Postcode Directory. Geography codes identify the official areas containing this postcode.
| Postcode | HA1 3JJ |
| Postcode without spaces | HA13JJ |
| Status | Active postcode |
| User type | Small user postcode |
| Introduced | January 1980 |
| Directory version | 2026-06 |
| Latitude | 51.5688600 |
| Longitude | -0.3392540 |
| British National Grid | 515,198 E, 186,861 N |
| Country | England |
| Region | London |
| Local authority | Harrow |
| Output Area (2021) | E00010708 |
| LSOA (2021) | E01002132 |
| MSOA (2021) | E02000461 |
| Electoral ward | E05013547 |
| Westminster constituency | E14001271 |
The postcode is assigned to these official political geographies. Names and election results will be added when the ElectionMaps datasets are connected.
These Census figures are matched directly to the full postcode, rather than inferred from a wider neighbourhood.
| Residents | 51 |
| Households | 25 |
| Female residents | 23 |
| Male residents | 28 |
| Residents per household | 2.0 |
A detailed vector map covering a 500 metre radius around the postcode.
Deprivation is published for the postcode's containing Lower Layer Super Output Area, a neighbourhood geography covering more than one postcode.
Land Registry Price Paid Data transactions matched to this exact full postcode.
| Sale date | Address | Property type | Tenure | Price |
|---|---|---|---|---|
| 18 May 2026 | 27, LONDON ROAD, HARROW | Flat or maisonette | Leasehold | £415,000 |
| 20 Jul 2025 | THE GERARDS, LONDON ROAD, HARROW | Semi-detached | Freehold | £1,600,000 |
| 31 Jan 2025 | 9, LONDON ROAD, HARROW | Flat or maisonette | Leasehold | £498,000 |
| 26 Jul 2024 | LINCOLN COTTAGE, LONDON ROAD, HARROW | Detached | Freehold | £1,250,000 |
| 28 Jun 2024 | 37, LONDON ROAD, HARROW | Flat or maisonette | Leasehold | £485,000 |
| 6 Jun 2024 | 11, LONDON ROAD, HARROW | Flat or maisonette | Leasehold | £735,000 |
| 23 Oct 2023 | 15, LONDON ROAD, HARROW | Flat or maisonette | Leasehold | £750,000 |
| 12 Mar 2021 | 33, LONDON ROAD, HARROW | Flat or maisonette | Leasehold | £433,000 |
Open schools and active GP practices in the HA1 postcode district, ordered by straight-line distance where coordinates are available.
Further education
Mount Park Avenue, Harrow-on-the-Hill, Middlesex, HA1 3HX
Ages 16–18
Other independent school
5 High Street, Harrow-on-the-Hill, HA1 3HP
Ages 12–19 · 833 pupils of 837 capacity
B
SUDBURY HILL, HARROW, HA1 3RX
Other independent school
South Hill Avenue, Harrow, Middlesex, HA1 3NU
Ages 4–13 · 467 pupils of 500 capacity
Voluntary aided school
Roxborough Park, Harrow, HA1 3BE
Ages 4–11 · 408 pupils of 420 capacity
7.6% eligible for free school meals
Academy converter
Sudbury Hill, Harrow, Middlesex, HA1 3SB
Ages 2–11 · 404 pupils of 420 capacity
5.4% eligible for free school meals
B
LANFRANC COURT, GREENFORD ROAD, HARROW, HA1 3QE
Other independent school
13 Kenton Road, Harrow, Middlesex, HA1 2BW
Ages 11–17 · 60 pupils of 60 capacity
B
COLBECK ROAD, HARROW, HA1 4BS
Free schools alternative provision
73-77 Lowlands Road, Harrow, HA1 3AW
Ages 11–16 · 0 pupils of 100 capacity
0.0% eligible for free school meals
B
NORTHWICK PARK HOSPITAL, WATFORD ROAD, HARROW, HA1 3UJ
B
289 STATION ROAD, HARROW, HA1 2TA
Companies House records whose registered-office address uses this exact postcode.
Private Limited Company
Incorporated 5 May 2026
46310 - Wholesale of fruit and vegetables
Private Limited Company
Incorporated 7 October 2024
85410 - Post-secondary non-tertiary education
Private Limited Company
Incorporated 24 September 2024
68209 - Other letting and operating of own or leased real estate
Private Limited Company
Incorporated 9 May 2018
47910 - Retail sale via mail order houses or via Internet
Private Limited Company
Incorporated 4 March 1992
98000 - Residents property management
Police.uk street-level incidents recorded across the postcode's containing LSOA in May 2026.
Harrow 029A includes HA1 3JJ and other nearby postcodes.
| Crime type | Incidents |
|---|---|
| Anti-social behaviour | 3 |
| Violence and sexual offences | 2 |
| Burglary | 1 |
Answers use the geographic scope stated with each dataset above.
HA1 3JJ is in Harrow, England.
The Census 2021 postcode-level dataset records 51 residents at HA1 3JJ. This is an exact postcode count.
The deprivation figures describe the containing Lower Layer Super Output Area, not only the individual postcode.
Yes. The sold-price records shown on this page are Land Registry transactions matched to the full HA1 3JJ postcode.
Vector Maps supplies editable UK postcode area, district and sector map files. For a vector or printed map focused on the full HA1 3JJ postcode and its approximate address-derived outline, request a custom map.
Explore other full postcodes in the same postcode sector.