Here is what is actually being proposed, what the Council's own evidence says about it, and how to write a response that will count — before the consultation closes on 29 May 2026.
Each of these is taken from the Council's own published evidence — not from us, and not from any campaign group.
The plan identifies 21,400 homes of supply across Hertsmere — against a borough-wide need of just 16,160. That over-allocation is deliberate. Reducing Radlett's share of 2,900 does not threaten the plan's soundness. (Reg 18 Table 12.1, p. 129.)
The Level 2 Strategic Flood Risk Assessment, the Water Cycle Study (sewer capacity), and a Transport & Movement Assessment for Radlett are all still in development. Residents are being asked to comment on 2,900 new homes without seeing the evidence that they are deliverable.
The Infrastructure Delivery Plan shows the Radlett school planning area will have only 0.8 Forms of Entry of spare primary school capacity by 2029-30 — about 24 Reception places a year. Any one of the proposed large sites would absorb that buffer many times over.
The Council has identified seven candidate sites (SA1–SA7). Two are already permitted or brownfield infill. Three are very large strategic urban extensions onto Green Belt fields. Here is the bigger picture.
These are the least controversial allocations: Regency House (extant permission), Railway Cottages car park (brownfield, but in Flood Zones 2 and 3), and the Shenley Hill site whose appeal was allowed in March 2026 with 50% affordable plus school and medical-centre land safeguarded.
The four large sites between Watford Road, Watling Street and the surrounding countryside. SA3 (972 homes) contains a Local Wildlife Site and TPO trees. SA6 (1,040 homes) sits on Grade 2 agricultural land with listed-building settings and the Hertfordshire Way running through. SA4 (450 homes) is HCC land that could deliver Radlett's missing secondary school. SA7 (190 homes) is safeguarded land already.
The Council's own Infrastructure Delivery Plan records existing AM-peak congestion "stretching as far back as Colney Street," with knock-on effects on Harper Lane (the M25 route from Radlett). Three of the largest sites would all empty onto the same approximately 1.5km of Watford Road — engaging the "severe residual cumulative impacts" test in NPPF para 116. No Transport & Movement Assessment has yet been published.
We've drafted a planning-grounded representation that anchors every objection in NPPF (December 2024) and the Council's own evidence base. Use it as-is, edit the parts you care most about, or copy individual paragraphs into your own letter. Every individual representation must be counted separately as a matter of law — your personalised email matters.
Open the draft response →The Reg 18 consultation is the moment when residents can shape which sites are allocated and at what scale. After Regulation 19 those decisions harden, and after examination the plan is adopted. This is the leverage point.
There is already a campaign — save-hertsmere.com — circulating a "one-click" template that supports building out SA3 and SA7 while refusing SA4 and SA6. We think that trade is the wrong one. It rests on a "community consensus" claim that no-one has documented and that named Radlett residents have publicly disputed.
The Council's own Sustainability Appraisal, Infrastructure Delivery Plan, and Green Belt Assessment support a more honest reading:
This site lays out the planning evidence in one place, so you can decide for yourself.
