HMO Conversion Guide

Define the proposed number of people and households, shared facilities and operating model. A small HMO may fall within Class C4; larger HMOs are generally sui generis, subject to assessment of the facts.

Check whether an Article 4 direction removes the relevant C3-to-C4 permitted development right. Separately check mandatory HMO licensing and any additional or selective scheme. A planning approval does not issue a housing licence, and a licence does not grant planning permission.

National mandatory licence conditions include minimum sleeping-room areas of 6.51 m² for one person aged over 10, 10.22 m² for two people aged over 10, and 4.64 m² for one child aged under 10. Rooms below 4.64 m² must not be used for sleeping, and floor area below a 1.5-metre ceiling height is disregarded for these conditions.

These are not automatic approvals for the stated occupancy. Council standards may require more area, communal space or different amenities, and the licence can limit occupants. Consider real furniture, circulation, storage, daylight and ventilation as well as the measured floor area.

The approach depends on the building, storeys, occupancy and conversion history. Escape routes, suitable doors, detection, compartmentation and any emergency-lighting requirements need coordinated advice from competent professionals.

Do not select alarm grades or door ratings from a generic internet checklist. Agree the applicable housing, building-regulations and fire-safety requirements with the relevant authorities and advisers for the specific property.

Test kitchen and bathroom provision against the council's standards, and coordinate drainage, water pressure, heating and electrical capacity for the proposed occupation. Provide space for refuse, cycles and practical management.

Consider sound transfer, privacy and the effect of intensifying use on neighbours. Planning concerns can involve amenity, concentration of HMOs and local policy as well as physical alterations.

Build and inspect the approved scheme, obtain relevant completion and installation evidence, and resolve the correct licensing process before letting where required. Keep an accurate plan showing the licensed arrangement.

Do not later turn a living room into an extra bedroom or add occupants without reassessing the licence, planning position and safety strategy. Management and maintenance obligations continue after the fit-out is finished.