Land by postcode · TW area · TW3
What the open records say about the TW3 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 Hounslow.
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
391
Median sale price
£430,000
Median £ per m² of floor area
£5,833
Median, last 12m vs prior 12m
-0.6%
£430,000 → £427,500
Mix of sales: 3% detached, 29% semi-detached, 26% terraced, 42% flats.
New-build sales 2023–2024: 82 of 466 (18%). 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 787 live postcodes in TW3 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
20 of 787 postcodes
St Stephen's · St Paul's Church
752 of 787 postcodes
2 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in TW3 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.
96% 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 TW3 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. 107 decided since 2021, 58 refused, typically 87 days to a decision.
41 of 107
approved, 38%
47% across London
125 homes approved of 340 applied for
Approved examples
PHARMACIA HOUSE 1 PRINCE REGENT ROAD, HOUNSLOW (3 new homes)
Conversion of the ground floor into three self contained flats
Approved 2021-09-15, Hounslow ref P/2021/2029
112 STAINES ROAD, HOUNSLOW (8 new homes)
Erection of a four storey building to provide a public house at ground and basement levels with eight flats on the upper floors including as...
Approved 2022-02-24, Hounslow ref P/2021/2826
132 HEATH ROAD, HOUNSLOW (1 new home)
Erection of a two-storey one bedroom house with associated car parking, cycle and bin storage following demolition of existing garage.
Approved 2022-01-13, Hounslow ref P/2021/4586
By the kind of plot, from the wording of each proposal:
10 decided since 2021, 5 refused, typically 88 days to a decision
3 of 10
approved, 30%
41% across London
Approved examples
42 NORTH DRIVE, HOUNSLOW
Conversion of existing single family dwelling to two dwellings
Approved 2023-02-20, Hounslow ref P/2022/3922
324 HANWORTH ROAD, HOUNSLOW
Conversion of the house into two self contained flats
Approved 2023-06-01, Hounslow ref P/2023/0369
1 Albert Road, Hounslow
Conversion of the existing house into two self-contained units with associated amenity space, cycle and refuse storage, and two off-street p...
Approved 2025-12-17, Hounslow ref P/2025/2963
35 decided since 2021, 22 refused, typically 82 days to a decision
11 of 35
approved, 31%
43% across London
Approved examples
112 STAINES ROAD, HOUNSLOW
Erection of a four storey building to provide a public house at ground and basement levels with eight flats on the upper floors including as...
Approved 2022-02-24, Hounslow ref P/2021/2826
132 HEATH ROAD, HOUNSLOW
Erection of a two-storey one bedroom house with associated car parking, cycle and bin storage following demolition of existing garage.
Approved 2022-01-13, Hounslow ref P/2021/4586
333-335 BATH ROAD, HOUNSLOW
Erection of additional floor comprising three residential units with associated amenity space and associated works.
Approved 2022-08-25, Hounslow ref P/2021/4445
6 decided since 2021, 4 refused, typically 90 days to a decision
2 of 6
approved, 33%
45% across London
Approved examples
1 CROSS LANCES ROAD, HOUNSLOW
Prioir approval for the change of use of the ground floor from a retail to one residential unit
Approved 2021-05-28, Hounslow ref PAR/2021/1328
4 Princes Mews, Hounslow
Conversion of existing garage into habitable space to the house.
Approved 2025-04-28, Hounslow ref P/2025/0560
Also decided here: 48 applications for outbuildings, annexes or garden buildings, 28 approved, typically 71 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.
Hounslow covers 96% of the sampled postcodes in TW3.
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 TW3, 0% of postcodes are in the Green Belt, 3% 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. 96% of postcodes in TW3 are under an Article 4 direction (2 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 TW3 the median sale is £430,000, and only 18% 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 TW3 would be measured against a £430,000 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: Hounslow'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.