HMO licensing in BCP: what to check before you convert

Converting a house into an HMO in Bournemouth, Christchurch or Poole can meaningfully improve a property’s income — but BCP Council applies a detailed set of amenity standards on top of the national licensing rules, and it’s easy to plan a conversion around the wrong numbers. Here’s what actually gets checked.

Bedroom sizes aren’t a guess

BCP Council works to specific minimum floor areas for HMO bedrooms: broadly, single rooms need at least 6.51m², and double rooms at least 10.22m², with a minimum ceiling height across most of the room. Smaller rooms (down to around 4.5m²) are only considered suitable for children under ten — not adult sharers. If a room falls short, it simply won’t count toward your licensed occupancy, no matter how the property is marketed.

Bathrooms and kitchens scale with occupancy

The number of bathrooms and kitchen facilities required rises in steps as occupancy increases — a 4-person shared house needs different provision to an 8 or 10-person HMO. As a rough guide:

These figures are a simplified guide — the exact requirement depends on whether tenants share a single joint tenancy or hold individual room-by-room agreements, which the Council treats slightly differently.

Fire safety is non-negotiable

Licensable HMOs need a fire detection and alarm system appropriate to the property’s layout and occupancy, generally to BS 5839 standards, along with fire doors, emergency lighting, and a documented fire risk assessment. This is usually the single biggest line item in a conversion budget, and it’s not an area where corners can be cut — building control sign-off depends on it.

Natural light, ventilation and floor-to-ceiling height

Every habitable room needs adequate natural light and ventilation, generally via an openable window, and a minimum ceiling height across most of the room’s floor area. Loft conversions in particular can fall foul of this if the room’s usable floor area — measured only where the ceiling clears 1.5m — ends up smaller than it looks on the plans.

The rules aren’t there to make conversions harder — they’re there because HMO tenants are sharing space with people they didn’t choose, and the standards exist to make that liveable.

The practical takeaway

• Check room sizes against BCP’s minimum standards before finalising a floor plan, not after
• Bathroom and kitchen provision scale with occupant numbers — get the count right early
• Fire safety compliance (BS 5839, fire doors, escape routes) should be budgeted from day one, not added on at the end
• Get sign-off from an independent building control body to avoid disputes at licensing stage

This is a general guide, not a substitute for BCP Council’s own published amenity standards, which should always be checked directly for your specific property and occupancy before any conversion work begins.