HMO compliance guides for UK landlords

Which fire door rules actually apply to your HMO — the 11-metre line catches most landlords out — what an FD30 door needs to pass, and how to tell a useful survey from an expensive one.

HMOs have stricter legal requirements than standard lets. This guide covers licensing, minimum room sizes, fire safety and management regulations.

Track several active room tenancies on one HMO address: property type HMO, optional room labels, rent per tenant, reminders to you, plus how it fits with Gas Safety, EICR and RRA duties.

Converting a family house into an HMO in 2026? Real cost data for planning (Article 4), fire doors, interlinked alarms, bathrooms, licensing and yield maths. Typical £20k–£60k spend per property.

Converting a family home to a house in multiple occupation (HMO) in 2026 costs £30,000–£200,000+ depending on size and spec. The step-by-step: planning permission (C3 to C4, sui generis), building regulations, HMO licensing, fire safety, and the numbers that decide whether the yield justifies the works.

Since 1 December 2023, HMOs in England are treated as a single dwelling for council tax — one band, one bill, landlord liable. That fixed the "one band per room" scandal that used to cost HMO landlords thousands. What the 2023 Regulations changed, when a landlord can still be caught, and where Wales sits.

Without an Article 4 Direction, converting a family home (C3) to a small HMO (C4) is permitted development — no planning permission needed. With one, you need full planning permission. In 2026, over 100 local authorities including 22+ London boroughs have Article 4 for HMOs. The complete guide.