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Browse 19 cases in the Planning Geek Case Law Library concerning Planning unit.
Fidler 2004 is a Court of Appeal authority on mixed uses, planning units, intensification and under-enforcement. A mixed use can materially change in character even if its component activities retain the same broad labels, and section 173(11) does not grant deemed permission for unrelated breaches omitted from the notice.
Burdle is the classic planning-unit authority: start with the whole unit of occupation unless a smaller area can be recognised as the site of a separate use both physically and functionally.
Thames Heliports is the Court of Appeal authority confirming that activities carried out from a vessel on tidal water can be capable of amounting to a material change in the use of land, and that the correct planning unit remains a matter of fact and degree for the planning decision-maker.
![R (on the application of KP JR Management Company Ltd) v London Borough of Richmond upon Thames [2018] EWHC 84 (Admin)](https://www.planninggeek.co.uk/wp-content/uploads/2026/09/KP-JR-Management-Residential-Boats-1080x675.jpg)
Planning Court case on the planning unit for a Thames mooring, lawful residential boat use and whether increased residential use amounted to a material change of use.
