Land by postcode · NW area · NW9
What the open records say about the NW9 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
1,120
Median sale price
£445,000
Median £ per m² of floor area
£6,667
Median, last 12m vs prior 12m
-14.4%
£468,260 → £401,000
Mix of sales: 1% detached, 14% semi-detached, 16% terraced, 69% flats.
New-build sales 2023–2024: 347 of 1,171 (30%). 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 1483 live postcodes in NW9 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
52 of 1483 postcodes
Roe Green Village · Buck Lane · St Andrews
1447 of 1483 postcodes
8 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in NW9 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.
98% 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 NW9 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. 54 decided since 2021, 38 refused, typically 68 days to a decision.
11 of 54
approved, 20%
47% across London
31 homes approved of 97 applied for
Approved examples
155 West Hendon Broadway London NW9 7EA (2 new homes)
Addition of two storeys at first and second floor levels to create 2no. self contained residential units. Alterations to rear including sepa...
Approved 2024-07-30, Barnet ref 21/0279/FUL
31 Beaulieu Close London NW9 6SB (2 new homes)
Demolition of the existing dwelling and erection of 2no. two storey dwelling houses with rooms in the roofspace. Associated amenity space, l...
Approved 2025-05-19, Barnet ref 24/5688/FUL
6A and 7-8, Elmwood Crescent (9 new homes)
Demolition of existing bungalow and detached garage at No.6A Elmwood Crescent and erection of two-storey detached building to be used as acc...
Approved 2021-10-22, Brent ref 21/3059
By the kind of plot, from the wording of each proposal:
12 decided since 2021, 8 refused, typically 68 days to a decision
3 of 12
approved, 25%
41% across London
Approved examples
5 Elvington Lane London NW9 5WB
Vertical subdivision of the existing dwellinghouse into 2no single family dwellings and associated external changes (AMENDED DESCRIPTION)
Approved 2025-06-24, Barnet ref 25/1834/FUL
40 Wyndale Avenue, London
Demolition of the existing detached 4-bed house & adjoining garage and construction of two 2-storey semi-detached dwellinghouses with rooms ...
Approved 2023-02-13, Brent ref 22/4264
20 Ennerdale Drive, London
Proposed conversion of single dwelling into 2x self-contained flats with refuse and cycle storages to the front
Approved 2024-09-13, Brent ref 24/1869
22 decided since 2021, 12 refused, typically 61 days to a decision
8 of 22
approved, 36%
43% across London
Approved examples
Mar House 50 The Hyde London NW9 5NG
Construction of mezzanine floor at first floor level to provide 9 no. self-contained residential flats (Class C3), with associated cycle par...
Approved 2021-06-14, Barnet ref 21/0519/FUL
Adj To 148 Colin Gardens London NW9 6ER
Erection of two storey dwelling. Associated parking, cycle store, refuse and recycling area
Approved 2021-09-03, Barnet ref 21/3785/FUL
2 Woolmead Avenue London NW9 7BE
Erection of a two storey dwelling containing 2no self contained flats. (Retrospective application)
Approved 2021-12-21, Barnet ref 21/5681/RCU
4 decided since 2021, typically 235 days to a decision
4 of 4
approved
49% across London
Approved examples
31 Beaulieu Close London NW9 6SB
Demolition of the existing dwelling and erection of 2no. two storey dwelling houses with rooms in the roofspace. Associated amenity space, l...
Approved 2025-05-19, Barnet ref 24/5688/FUL
35 Braemar Gardens London NW9 5LB
Demolition of the existing dwelling and erection of a new two storey dwelling with rooms in the roofspace.
Approved 2025-09-12, Barnet ref 25/1849/FUL
4-5 Elmwood Crescent, London
Demolition of existing bungalow and erection of new-build residential dwellings (Use Class: C3) together with ancillary refuse and cycle sto...
Approved 2023-03-01, Brent ref 22/1280
3 decided since 2021, 1 refused, typically 80 days to a decision
2 of 3
approved
45% across London
Approved examples
10 Byron Avenue, London
Conversion of existing garage into a habitable room in the dwellinghouse.
Approved 2021-11-08, Brent ref 21/3213
16 Dors Close, London
Proposed conversion of garage into habitable room to ground-floor flat
Approved 2023-06-28, Brent ref 23/1551
Also decided here: 55 applications for outbuildings, annexes or garden buildings, 26 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.
NW9 is split between planning authorities: Barnet (56% of sampled postcodes), Brent (43% of sampled postcodes).
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 NW9, 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. 98% of postcodes in NW9 are under an Article 4 direction (8 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 NW9 the median sale is £445,000, and 30% 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 NW9 would be measured against a £445,000 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: the 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.