Cambridge’s proposed house in multiple occupation (HMO) controls have won unanimous Cabinet approval. The Cambridge HMO controls would cover the urban area, after councillors agreed on 21st October 2026 that officers should prepare a non-immediate Article 4 Direction.
I would not treat the Cambridge HMO controls as operative yet. The Cabinet decision authorises the legal document and consultation to be prepared, but it does not itself withdraw permitted development rights. No Direction has yet been made, confirmed or brought into force.
For a homeowner, landlord or buyer, that means the ordinary planning position has not changed today. The proposed boundary covers Cambridge’s urban area, while linked areas outside the city boundary will need a separate decision from South Cambridgeshire District Council.
Cambridge HMO controls are approved, not operative
Cambridge City Council’s official decision record says Cabinet resolved unanimously to implement a non-immediate Direction, delegate its preparation and public consultation to the Director of Planning, and bring the result back to Cabinet before any confirmation decision. The decision is subject to call-in until 27th October and becomes effective as a Cabinet decision on 28th October if it is not called in.
That “effective” date is not the date on which planning permission becomes compulsory. It only marks when the Cabinet authority to proceed takes effect. The actual Article 4 Direction must still be prepared and made, and its notice will establish the future commencement date.
The Council expects a six-week consultation to start in November 2026. Responses are intended to return to Cabinet in early 2027, when councillors will decide whether to confirm the Direction. Until the formal notice is published, both the consultation dates and the eventual operative date remain to be confirmed.
What the proposed Cambridge boundary covers
The proposed map covers the urban area within Cambridge City Council. The report says all city wards are affected and explains that Cambridge is compact, with employment, university and healthcare sites spread across the city. Officers consider that a narrower boundary would not address the housing-quality and amenity issues they want the Cambridge HMO controls to manage.
This should not be confused with a Direction covering the whole of Greater Cambridge. South Cambridgeshire District Council is due to consider a linked proposal on 24th November 2026 for adjoining urban areas, including Orchard Park and parts of Cherry Hinton outside the city boundary. That council must make its own decision and publish its own map and legal instrument.
The boundary distinction matters for anyone checking a particular address. A broad reference to “Cambridge” is not enough. Planning Geek’s earlier Cambridge HMO Article 4 report explains the coordinated proposals, while the proposed city boundary map shows the land currently being considered.
What the Council’s evidence says
The Cabinet report draws on the 2026 Greater Cambridge study of houses in multiple occupation. It estimates that Cambridge had 1,727 licensed and unlicensed HMOs in February 2026, equivalent to about 3% of the city’s building stock. Concentrations were identified around Mill Road, Anglia Ruskin University and areas of older terraced housing.
The evidence is more balanced than a simple claim that HMOs cause neighbourhood problems. The study found no correlation between HMOs and crime or antisocial behaviour. It found some correlation with amenity complaints, including noise and rubbish, but said the Council’s data could not demonstrate a causal relationship. It also found limited evidence that HMOs were causing a loss of family-sized homes.
At the same time, the Council says shared housing is an important part of Cambridge’s supply of comparatively affordable accommodation. Students, professionals and healthcare workers are among those relying on it. The stated aim is therefore to improve quality and manage cumulative effects, not to remove HMOs from the city.
That distinction is worth keeping. The report states: “An Article 4 Direction does not prevent the development to which it applies”. It would instead require a planning application so that the Council can assess a proposed change against the development plan and other material considerations.
What Cambridge HMO controls would change
In England, Class L(b) of Part 3 of the General Permitted Development Order normally allows a change from a dwellinghouse in Use Class C3 to a small house in multiple occupation in Use Class C4 without a planning application. Class C4 generally covers occupation by three to six unrelated people who share basic facilities.
Once the Cambridge HMO controls become operative, that permitted development route would be removed inside the mapped area. A proposed C3-to-C4 change would then need planning permission. Larger HMOs, usually occupied by more than six unrelated people, already sit outside Class C4 and normally require planning permission as a sui generis use, meaning a use in a class of its own.
The proposal is not retrospective. A lawful existing HMO would not become unlawful merely because a Direction later takes effect. Anyone relying on an existing use should retain tenancy agreements, occupancy records and other evidence showing when the use began and how it continued.
Planning permission and HMO licensing also remain separate. A licence regulates housing standards and management, but it is not planning permission and does not by itself prove that the planning use is lawful. The lawful HMO guide explains the evidence questions that can arise.
Why the Direction is non-immediate
Officers recommended a non-immediate route because it provides a notice period before the restriction begins. The report says a period of at least 12 months is intended to avoid the compensation exposure that can arise when permitted development rights are removed with less notice.
The Council’s financial assessment therefore states that it will not be liable to pay compensation under the proposed approach. That conclusion depends on the final legal timetable matching the non-immediate process described in the report. The made Direction and statutory notice will be the documents that settle the dates.
An Equality Impact Assessment gives 3rd January 2028 as a proposed implementation date, but that is an indicative project date rather than an operative date in a made Direction. I would keep the table entry as “to be announced” (TBA) until the Council publishes the legal document and notice.
What happens next
The immediate next step is for officers to prepare the Direction and consultation material. The Cambridge HMO controls should then go through the advertised consultation before Cabinet considers whether to confirm them. Confirmation would still not make the control immediate if the notice period has not expired.
The approved Cambridge HMO controls remain a city proposal unless and until South Cambridgeshire makes its own decision. South Cambridgeshire’s separate Cabinet report is expected in November. If that authority approves its adjoining-area proposal, the shared planning service intends the two processes to proceed together, but the boundaries and legal status must still be checked council by council.
For now, buyers, landlords and agents should use the current planning position, watch for the formal consultation and check the proposed map during due diligence. Planning Geek’s HMO Article 4 table records Cambridge as approved but not yet made. I will update it again when an actual Direction, notice and reliable commencement date are published.
Official sources: Cambridge Cabinet decision and Cabinet report.
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