Land by postcode · TW area · TW4
What the open records say about the TW4 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
183
Median sale price
£452,000
Median £ per m² of floor area
£5,733
Median, last 12m vs prior 12m
+6.1%
£433,500 → £460,000
Mix of sales: 3% detached, 28% semi-detached, 41% terraced, 28% flats.
New-build sales 2023–2024: 1 of 206 (0%). 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 428 live postcodes in TW4 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
3 of 428 postcodes
Hounslow
356 of 428 postcodes
2 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in TW4 fall inside: National Landscape (AONB), National Park, Conservation Area.
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.
1% of postcodes in TW4 are inside the Green Belt, so Hounslow 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.
83% 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 TW4 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. 39 decided since 2021, 18 refused, typically 94 days to a decision.
15 of 39
approved, 38%
47% across London
45 homes approved of 111 applied for
Approved examples
495-497 STAINES ROAD, HOUNSLOW (8 new homes)
Erection of a part four part five storey building comprising eight residential units and a public house / restaurant at ground floor with as...
Approved 2022-07-13, Hounslow ref P/2021/0542
LAND TO THE REAR OF RECTORY COURT RECTORY ROAD, HOUNSLOW (4 new homes)
Erection of four houses with associated landscaping and amenity space.
Approved 2022-11-16, Hounslow ref P/2022/1934
112 WELLINGTON ROAD NORTH, HOUNSLOW (1 new home)
Erection of a two storey house with parking and amenity space following the demolition of the existing building
Approved 2023-01-31, Hounslow ref P/2022/1881
By the kind of plot, from the wording of each proposal:
6 decided since 2021, 4 refused, typically 88 days to a decision
2 of 6
approved, 33%
41% across London
Approved examples
77 BASILDENE ROAD, HOUNSLOW
Conversion of the house into two self-contained flats
Approved 2022-09-23, Hounslow ref P/2022/0533
76 Francis Road,Hounslow
Conversion of the existing single family house into two residential units with associated car parking, private amenity, cycle and refuse sto...
Approved 2025-01-16, Hounslow ref P/2024/3906
26 decided since 2021, 11 refused, typically 135 days to a decision
12 of 26
approved, 46%
43% across London
Approved examples
495-497 STAINES ROAD, HOUNSLOW
Erection of a part four part five storey building comprising eight residential units and a public house / restaurant at ground floor with as...
Approved 2022-07-13, Hounslow ref P/2021/0542
50 ST DUNSTANS ROAD, HOUNSLOW
Erection of a two storey side and rear extenson to the house
Approved 2021-09-08, Hounslow ref P/2021/2769
LAND TO THE REAR OF RECTORY COURT RECTORY ROAD, HOUNSLOW
Erection of four houses with associated landscaping and amenity space.
Approved 2022-11-16, Hounslow ref P/2022/1934
6 decided since 2021, 2 refused, typically 81 days to a decision
3 of 6
approved, 50%
45% across London
Approved examples
THE HOLLIES 1A FIR TREE ROAD, HOUNSLOW
Conversion of the garage into a habitable room of the house
Approved 2023-04-06, Hounslow ref P/2023/0357
358 Staines Road, Hounslow
Conversion of the existing takeaway unit on the ground floor into a self contained flat.
Approved 2025-08-31, Hounslow ref P/2025/1599
1 Heathside Whitton Hounslow TW4 5NJ
CONVERSION OF DETACHED GARAGE INTO GAMES ROOM ANCILLARY TO THE MAIN DWELLING HOUSE
Approved 2022-08-30, Richmond upon Thames ref 22/1963/HOT
Also decided here: 35 applications for outbuildings, annexes or garden buildings, 12 approved, typically 68 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.
TW4 is split between planning authorities: Hounslow (85% of sampled postcodes), Richmond upon Thames (15% 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 TW4, 1% of postcodes are in the Green Belt. 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. 83% of postcodes in TW4 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 TW4 the median sale is £452,000, and only 0% 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 TW4 would be measured against a £452,000 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.