Land by postcode · N area · N3
What the open records say about the N3 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 Barnet, London.
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
426
Median sale price
£650,000
Median £ per m² of floor area
£8,833
Median, last 12m vs prior 12m
+1.2%
£642,500 → £650,000
Mix of sales: 7% detached, 28% semi-detached, 15% terraced, 50% flats.
New-build sales 2023–2024: 14 of 434 (3%). 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 630 live postcodes in N3 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
23 of 630 postcodes
Finchley Church End · Finchley Garden Village · Glenhill Close
630 of 630 postcodes
4 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in N3 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.
100% of postcodes are covered by an Article 4 direction, which removes specific permitted development rights in that area, so changes that are automatic elsewhere need a planning application there.
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 N3 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. 42 decided since 2021, 18 refused, typically 78 days to a decision.
16 of 42
approved, 38%
47% across London
44 homes approved of 110 applied for
Approved examples
27 Station Road London N3 2SB (2 new homes)
Conversion of existing dwellinghouse into 2no self contained flats. Associated amenity space, refuse/recycling and cycle store
Approved 2022-03-21, Barnet ref 22/0342/FUL
Land Adjacent To 235 Nether Street London N3 1NT (1 new home)
Erection of a two storey structure with flat roof to facilitate creation of 1-bedroom 1st Floor Flat and Ground Floor Retail Unit Class E(a)...
Approved 2023-06-19, Barnet ref 23/0931/FUL
Marwood Court 25 Gruneisen Road London N3 1LT (2 new homes)
Outline planning application for construction of a third floor level to provide 2no. flats. Provision of off-street parking and refuse and r...
Approved 2024-10-29, Barnet ref 24/1257/OUT
By the kind of plot, from the wording of each proposal:
22 decided since 2021, 8 refused, typically 84 days to a decision
12 of 22
approved, 55%
43% across London
Approved examples
Land Adjacent To 1 Wickliffe Avenue London N3 3EL
Outline application for construction of 2no. two-storey plus rooms in roofspace single family dwellings with associated amenity space to rea...
Approved 2021-06-03, Barnet ref 21/1741/OUT
Rear Of 98 Ballards Lane London N3 2DN
Erection of a single storey townhouse with basement level for use of 1no residential unit (Class C3)
Approved 2022-04-22, Barnet ref 21/3321/FUL
202 - 208 Regents Park Road London N3 3HP
Demolition of the existing building and construction of a new 5 storey building with basement comprising 8 residential units (Use Class C3) ...
Approved 2022-03-11, Barnet ref 21/4381/FUL
6 decided since 2021, 4 refused, typically 69 days to a decision
2 of 6
approved, 33%
49% across London
Approved examples
34 St Marys Avenue London N3 1SN
Demolition of existing house and the erection of a new two-storey plus rooms in roofspace semi-detached dwellinghouse. Associated amenity sp...
Approved 2022-06-16, Barnet ref 21/5028/FUL
72-74 Regents Park Road London N3 3JH
Demolition of the existing property and erection of a part three, part four storey building plus basement comprising of nine self-contained ...
Approved 2024-01-30, Barnet ref 23/4042/FUL
8 decided since 2021, 3 refused, typically 57 days to a decision
3 of 8
approved, 38%
45% across London
Approved examples
7 Shakespeare Road London N3 1FA
Conversion of existing ground floor Class B8 (warehouse and storage) into 1no. self-contained flat Class C3 (residential) use
Approved 2022-10-17, Barnet ref 22/2617/FUL
108-112 Regents Park Road London N3 3JG
Conversion of commercial unit class (Ec, Sui Generis) into residential use class (C3)
Approved 2023-01-11, Barnet ref 22/4827/FUL
85 - 87 Ballards Lane London N3 1XT
Change of use of the first, second and third floors from vacant offices (formerly Class B1) to a guest house (Class C1)
Approved 2024-05-22, Barnet ref 24/0606/FUL
Also decided here: 35 applications for outbuildings, annexes or garden buildings, 30 approved, typically 58 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.
Barnet covers 100% of the sampled postcodes in N3.
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 N3, 0% of postcodes are in the Green Belt, 4% 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. 100% of postcodes in N3 are under an Article 4 direction (4 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 N3 the median sale is £650,000, and only 3% 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 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 N3 would be measured against a £650,000 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: Barnet'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.