What the HMO direction actually changes for an owner
The direction is easy to misread in both directions, so it is worth being precise about what it does. Nationally, changing the use of a dwellinghouse to a small house in multiple occupation — broadly, three to six unrelated people sharing facilities — is permitted development, moving between use classes C3 and C4 without an application. Haringey has removed that right across fourteen wards including Harringay, so within them the change requires planning permission. What the direction does not do is regulate who may live in a house: a family, a couple with a lodger, or a household that is a single household in planning terms is unaffected, and the direction does not apply retrospectively to a use that was already lawfully established before it came into force on 30 November 2013. Nor does it replace licensing, which is a separate regime with its own thresholds, standards and enforcement — a house can require both a planning permission and a licence, and having one says nothing about the other. Three practical consequences follow for anyone refurbishing here. First, if you are buying a house that is being let to sharers, the lawfulness of that use is a question to answer before exchange rather than after, because an unlawful use is not cured by having gone unnoticed and the value of the house may depend on it. Second, if you intend to let a family house to sharers after the works, that is a planning application and it should be made and determined before the design is finalised, since a refusal changes the brief entirely. Third, if you are converting a shared house back to family use, that direction is not an obstacle at all — returning to C3 needs no permission — but the physical work of undoing the conversion is substantial and is worth surveying properly before it is priced.