Use this guide to understand N3 1SN in Barnet. 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 146 residents and 52 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 | N3 1SN |
| Postcode without spaces | N31SN |
| Status | Active postcode |
| User type | Small user postcode |
| Introduced | January 1980 |
| Directory version | 2026-06 |
| Latitude | 51.5979000 |
| Longitude | -0.2039550 |
| British National Grid | 524,495 E, 190,312 N |
| Country | England |
| Region | London |
| Local authority | Barnet |
| Output Area (2021) | E00000999 |
| LSOA (2021) | E01000200 |
| MSOA (2021) | E02000051 |
| Electoral ward | E05013639 |
| Westminster constituency | E14001238 |
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 | 146 |
| Households | 52 |
| Female residents | 75 |
| Male residents | 71 |
| Residents per household | 2.8 |
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 |
|---|---|---|---|---|
| 19 Dec 2025 | 19, ST MARYS AVENUE, LONDON | Semi-detached | Freehold | £1,350,000 |
| 20 Nov 2025 | FLAT E, 13, ST MARYS AVENUE, LONDON | Flat or maisonette | Leasehold | £385,000 |
| 22 Nov 2024 | 1, ST MARYS AVENUE, LONDON | Other | Freehold | £22,630 |
| 30 Jun 2023 | 38, ST MARYS AVENUE, LONDON | Semi-detached | Freehold | £1,185,000 |
| 12 Aug 2021 | 1D, ST MARYS AVENUE, LONDON | Flat or maisonette | Leasehold | £396,000 |
| 25 Mar 2021 | 34, ST MARYS AVENUE, LONDON | Semi-detached | Freehold | £875,000 |
| 12 Mar 2021 | 1, ST MARYS AVENUE, LONDON | Other | Freehold | £825,000 |
| 2 Feb 2021 | 3B, ST MARYS AVENUE, LONDON | Flat or maisonette | Leasehold | £625,000 |
| 14 Aug 2020 | 38, ST MARYS AVENUE, LONDON | Semi-detached | Freehold | £965,000 |
Open schools and active GP practices in the N3 postcode district, ordered by straight-line distance where coordinates are available.
Other independent school
6 Hendon Avenue, Finchley, London, N3 1UE
Ages 2–6 · 43 pupils of 193 capacity
Other independent school
Hendon Lane, Finchley, London, N3 1SA
Ages 11–16 · 275 pupils of 300 capacity
Voluntary aided school
Hendon Lane, Pardes House Primary School, London, Middlesex, N3 1SA
Ages 4–11 · 359 pupils of 360 capacity
2.5% eligible for free school meals
B
SUPREME HOUSE, 300 REGENTS PARK ROAD, FINCHLEY, LONDON, N3 2JX
B
55 MOUNTFIELD ROAD, FINCHLEY, LONDON, N3 3NR
B
55 MOUNTFIELD ROAD, FINCHLEY, LONDON, N3 3NR
Community school
Chalgrove Gardens, Finchley, London, N3 3PL
Ages 4–11 · 217 pupils of 224 capacity
25.3% eligible for free school meals
Voluntary aided school
Dollis Park, Finchley, London, N3 1BT
Ages 2–11 · 431 pupils of 420 capacity
9.9% eligible for free school meals
B
64 LICHFIELD GROVE, FINCHLEY, LONDON, N3 2JP
Voluntary aided school
80 East End Road, London, N3 2SY
Ages 4–11 · 418 pupils of 420 capacity
0.5% eligible for free school meals
Voluntary aided school
East End Road, Finchley, London, N3 2TD
Ages 3–11 · 180 pupils of 262 capacity
20.0% eligible for free school meals
B
2 ROSEMARY AVENUE, FINCHLEY, LONDON, N3 2QN
Companies House records whose registered-office address uses this exact postcode.
Private Unlimited Company
Incorporated 18 March 2026
64209 - Activities of other holding companies n.e.c.
Private Limited Company
Incorporated 16 March 2026
69201 - Accounting and auditing activities
Private Limited Company
Incorporated 5 February 2026
63110 - Data processing, hosting and related activities
Private Limited Company
Incorporated 10 December 2025
41100 - Development of building projects
Private Limited Company
Incorporated 7 November 2025
43999 - Other specialised construction activities n.e.c.
Private Limited Company
Incorporated 9 September 2024
98000 - Residents property management
Private Limited Company
Incorporated 8 March 2023
35300 - Steam and air conditioning supply
Private Limited Company
Incorporated 12 November 2020
43290 - Other construction installation
Private Limited Company
Incorporated 20 March 2019
49320 - Taxi operation
Private Limited Company
Incorporated 30 October 2018
70229 - Management consultancy activities other than financial management
Private Limited Company
Incorporated 30 May 2014
32990 - Other manufacturing n.e.c.
Private Limited Company
Incorporated 17 June 1996
59200 - Sound recording and music publishing activities
Police.uk street-level incidents recorded across the postcode's containing LSOA in May 2026.
Barnet 028B includes N3 1SN and other nearby postcodes.
| Crime type | Incidents |
|---|---|
| Anti-social behaviour | 2 |
| Burglary | 1 |
| Other theft | 1 |
| Public order | 1 |
| Theft from the person | 1 |
Answers use the geographic scope stated with each dataset above.
N3 1SN is in Barnet, England.
The Census 2021 postcode-level dataset records 146 residents at N3 1SN. 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 N3 1SN postcode.
Vector Maps supplies editable UK postcode area, district and sector map files. For a vector or printed map focused on the full N3 1SN postcode and its approximate address-derived outline, request a custom map.
Explore other full postcodes in the same postcode sector.