Land by postcode · N area · N20
What the open records say about the N20 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
411
Median sale price
£660,000
Median £ per m² of floor area
£8,861
Median, last 12m vs prior 12m
+18.8%
£625,000 → £742,600
Mix of sales: 11% detached, 32% semi-detached, 15% terraced, 43% flats.
New-build sales 2023–2024: 89 of 549 (16%). 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 536 live postcodes in N20 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
18 of 536 postcodes
Barnet
59 of 536 postcodes
Totteridge
536 of 536 postcodes
7 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in N20 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.
3% of postcodes in N20 are inside the Green Belt, so Barnet, London has land both inside and outside it. Which side of the boundary a plot sits on determines whether the Green Belt tests apply to it at all.
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 N20 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. 26 decided since 2021, 12 refused, typically 65 days to a decision.
13 of 26
approved, 50%
47% across London
16 homes approved of 33 applied for
Approved examples
57 Athenaeum Road London N20 9AL (1 new home)
Demolition of the existing dwelling and erection of a two storey dwelling with rooms in the roofspace. Associated parking and cycle storage ...
Approved 2021-05-21, Barnet ref 21/0820/FUL
26 Oaklands Road London N20 8AX (1 new home)
Demolition of existing dwelling and erection of a two storey dwellinghouse with integral garage and basement
Approved 2022-08-02, Barnet ref 22/0453/FUL
Rear Of 159 Friern Barnet Lane London N20 0NN (1 new home)
Erection of a bungalow
Approved 2022-04-22, Barnet ref 22/0989/FUL
By the kind of plot, from the wording of each proposal:
4 decided since 2021, 2 refused, typically 60 days to a decision
2 of 4
approved
41% across London
Approved examples
6 Simmons Way London N20 0TL
Vertical subdivision of the plot to form a pair of semi-detached houses (Retrospective Application)
Approved 2023-10-11, Barnet ref 23/2276/RCU
55 Fernwood Crescent London N20 0RP
Sub-division of the existing dwelling into 2no. self-contained flats
Approved 2023-07-27, Barnet ref 23/2418/FUL
28 decided since 2021, 17 refused, typically 90 days to a decision
10 of 28
approved, 36%
43% across London
Approved examples
Rear Of 153 Friern Barnet Lane London N20 0NP
Construction of 3no two storey dwelling houses with rooms in the roofspace. Associated amenity space, landscaping and parking
Approved 2022-01-31, Barnet ref 21/2109/FUL
Rear Of 159 Friern Barnet Lane London N20 0NN
Erection of a bungalow
Approved 2022-04-22, Barnet ref 22/0989/FUL
Thatcham Court High Road London N20 9QU
Erection of a 3 storey building to provide 2no self-contained flats following demolition of the existing bin and general store. Associated p...
Approved 2022-10-03, Barnet ref 22/3458/FUL
37 decided since 2021, 7 refused, typically 84 days to a decision
26 of 37
approved, 70%
49% across London
Approved examples
101 Greenway London N20 8EL
Demolition of the existing dwelling and erection of a new two storey dwelling with rooms in the roofspace
Approved 2021-04-08, Barnet ref 21/0456/FUL
Dolphins Totteridge Green London N20 8PE
Demolition of the existing dwelling and erection of a new two storey dwelling with rooms in the roofspace and double garage
Approved 2022-03-08, Barnet ref 21/0625/FUL
57 Athenaeum Road London N20 9AL
Demolition of the existing dwelling and erection of a two storey dwelling with rooms in the roofspace. Associated parking and cycle storage ...
Approved 2021-05-21, Barnet ref 21/0820/FUL
Also decided here: 27 applications for outbuildings, annexes or garden buildings, 14 approved, typically 62 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 N20.
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 N20, 3% of postcodes are in the Green Belt, 11% in a conservation area. On Green Belt or National Landscape plots a new home is the exception and needs a specific case; a replacement dwelling, a conversion or a modest extension is usually the realistic route there. 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 N20 are under an Article 4 direction (7 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 N20 the median sale is £660,000, and only 16% 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 N20 would be measured against a £660,000 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.