HMO compliance checklist for portfolio landlords

HMOs carry the heaviest compliance load in residential property and the steepest penalties for failure — rent repayment orders, banning orders and civil penalties of up to £30,000 per breach. For a portfolio landlord running several, the duties multiply and the dates drift. This is the checklist.

Is it an HMO?

The standard test: a property is an HMO if at least three tenants live there forming more than one household (a household being a single person or members of the same family), and they share a toilet, bathroom or kitchen. A building converted into self-contained flats can also be an HMO under the converted-buildings rules.

It's a large HMO — and needs a mandatory licence — when it's occupied by five or more people forming two or more households. That threshold is national.

Licensing: check every council

Three regimes can apply, and they stack:

• Mandatory licensing — all large HMOs (5+), everywhere in England.
• Additional licensing — a council can extend HMO licensing to smaller HMOs in its area.
• Selective licensing — a council can require a licence for all private lets in a designated area, HMO or not.

Because additional and selective schemes are local and time-limited, a portfolio spread across boroughs can have different requirements per property — the full licensing guide covers the three regimes, the renewal trap and the penalties. Operating without a required licence is an offence even if you simply didn't realise a scheme had started.

The compliance stack

On top of normal letting duties, an HMO typically requires:

• Fire safety — a more demanding fire risk assessment, interlinked alarms (often a graded system), fire doors, and emergency lighting on escape routes. Sleeping risk means the bar is higher.
• Gas safety — the annual gas safety check and Landlord Gas Safety Record.
• Electrical safety — a satisfactory EICR every five years, plus often PAT on landlord-supplied appliances.
• Legionella — a risk assessment and controls for the water system.
• EPC / MEES — a valid Energy Performance Certificate; the property must meet the minimum E rating under the Minimum Energy Efficiency Standards to be let.
• Amenity and space standards — minimum room sizes for sleeping (set nationally, with a floor of 6.51 m² for one person over 10), adequate kitchen and bathroom provision per occupant, and waste arrangements — often written into the licence conditions.
• Management regulations — the Management of Houses in Multiple Occupation (England) Regulations impose duties on the manager for maintenance, safety and common parts.

The penalties

Enforcement sits with the local authority. Get it wrong and you face:

• Unlimited fines on conviction for operating an unlicensed HMO;
• Civil penalties of up to £30,000 per breach, as an alternative to prosecution;
• Rent repayment orders — tenants (or the council) can reclaim up to 12 months' rent;
• a banning order and entry on the rogue landlord database for serious or repeat offenders.

The financial exposure compounds across a portfolio — one missed licence renewal on each of five properties is five separate offences.

Why portfolios slip

It's rarely ignorance. It's that an HMO has six or more dated obligations, each renews on its own clock, licences expire on dates that vary by council, and a portfolio multiplies all of it. The failure is administrative: a renewal date passes unnoticed.

That's the problem Proprietas is built for — every site × regime becomes a tracked obligation with a computed due date and a 90/60/30/7-day reminder workflow, licences included, across the whole portfolio in one view. See the full compliance picture, or try it on a real certificate.

This is a plain-English overview, not legal advice — HMO definitions, licensing and standards vary by local authority and change over time; always check your council's current scheme.