Hertfordshire, East of England
Land in Three Rivers
Figures for the Three Rivers council area (89 km²) from the open data behind our tools: registered land by size, planning constraints, farmland quality, the electricity network, brownfield sites, and land that may not be registered at all.
1,834
registered land outlines of an acre or more, 217 of them 20 acres or more.
Search them in the site finder →62
brownfield register sites, 50 hectares in all, with room for at least 1,277 homes by the council's estimate.
See them on the map →202
plots that may not be registered with HM Land Registry, on our sister site.
Unregistered land in Three Rivers →2
outlines that pass the site finder’s solar farm starting filters: 20 acres or more, near a substation, outside the main constraints and the best farmland.
Show them →Housing and the local plan
In the government’s Housing Delivery Test 2025, Three Rivers built 47% of the homes it needed over three years: presumption in favour.
The council delivered under 75% of the homes it needed, so national policy's presumption in favour of sustainable development (the "tilted balance") applies to housing applications: permission should be granted unless the harm would significantly and demonstrably outweigh the benefits, or protective policies such as Green Belt, National Landscapes or flood risk give a clear reason to refuse.
Its adopted local plan is the Core Strategy Development Plan Document, adopted October 2011 (15 years ago; plans are meant to be reviewed at least every five years).
A new plan, the Three Rivers New Local Plan, is at early consultation (Regulation 18).
From MHCLG’s Housing Delivery Test and the Planning Data platform’s local plan records, which some councils haven’t kept up to date. Whether the tilted balance applies to a scheme also depends on the council’s five-year land supply and the site itself: get planning advice.
Planning constraints
Of the 1,834 outlines of an acre or more, 1,381 (75%) are mostly in Green Belt. 183 (10%) are partly in flood zone 3, the highest risk.
From the government’s Planning Data platform. Check any site with Planning check.
Farmland quality
1% of the graded farmland outlines of an acre or more are grade 1 or 2, the best and most versatile land.
- Grade 215
- Grade 31,107
- Grade 428
- Non-agricultural191
- Urban493
Natural England’s provisional grades at the centre of each outline. A broad-scale map, so a field survey is needed for any one site.
Electricity network
215 outlines of an acre or more are within 1 km of a primary or grid substation. The network operator’s published figures show no spare demand capacity at its substations here.
The best 2 km square for a data centre scores 41 out of 100. Data centre site search →
Nearby council areas
Counts are of HM Land Registry INSPIRE title outlines (one title can have several outlines, and an outline isn’t always one field), counted under the council HM Land Registry files them with. Substations are from OpenStreetMap. None of this says whether land is for sale or could get planning permission. Sources: HM Land Registry; MHCLG Planning Data; Provisional Agricultural Land Classification © Natural England, Open Government Licence; the councils’ brownfield land registers; network operator open data; © OpenStreetMap contributors.