Land by postcode · RH area · Horsham
Horsham covers two postcode districts, RH12 and RH13, in West Sussex. Planning applications here are decided by the Horsham planning authority. Below: what homes sold for, which planning controls apply, and what that means before you sell or develop a plot in Horsham.
Residential sales recorded by HM Land Registry between 2024-08 and 2026-07 across both of Horsham's postcode districts. This is market context for the town, 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
2,595
Median sale price
£420,000
Median £ per m² of floor area
£4,773
Median, last 12m vs prior 12m
-0.5%
£422,000 → £420,000
Mix of sales: 27% detached, 27% semi-detached, 24% terraced, 23% flats.
New-build sales 2023–2024: 321 of 2,696 (12%). 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 2,515 live postcodes in Horsham's two districts whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
36 of 2,515 postcodes
High Weald
112 of 2,515 postcodes
Horsham Conservation Area · Warnham Conservation Area · Cowfold Conservation Area · Horsham (Park Terrace Gardens) Conservation Area · Horsham (London Road) Conservation Area and 8 more
37 of 2,515 postcodes
1 separate direction recorded, each removing particular permitted development rights within a defined area.
No postcodes in Horsham's two districts fall inside: Green Belt, 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.
None of these designations covers more than a small share of postcodes in Horsham. What can be built on a given plot is decided by the local plan, settlement boundaries and site-specific matters such as access, flood risk and neighbours, none of which this page measures.
These are town-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.
Horsham covers 99% of the sampled postcodes in Horsham.
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 town average. Across Horsham, 0% of postcodes are in the Green Belt, 1% in a National Landscape and 4% in a conservation area. on Green Belt or National Landscape plots a new home is the exception and needs a specific case, and a replacement dwelling, a conversion or a modest extension is usually the realistic route. 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.
Often, yes. 1% of postcodes in Horsham are under an Article 4 direction (1 separate direction), 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 Horsham the median sale is £420,000, from £407,000 in RH12 to £440,000 in RH13, and only 12% 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 town 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 Horsham would be measured against a £420,000 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.
Computed from open-data records; town-level, not plot-level measurements. Horsham here means the two postcode districts whose most common post town is Horsham. 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); conservation areas and Article 4 directions are made locally and published on that national register. Postcode centroids: OS Code-Point Open, contains OS data © Crown copyright and database right 2026. Figures computed 2026-10-19.