HMO (House in Multiple Occupation)
A property let to 3 or more people from 2 or more households who share facilities (kitchen, bathroom, toilet). Any HMO with 5 or more occupants from 2 or more households needs a mandatory HMO licence from the local authority. Many councils also operate additional licensing for smaller HMOs.
At a glance
- Mandatory licence
- 5+ people from 2+ households, shared facilities
- Additional licensing
- Smaller HMOs (council-designated)
- Max penalty
- £30,000 per property + RRO
- Licence term
- 5 years (typical)
Full guide
Read the complete landlord guide on HMO (House in Multiple Occupation)
Deadlines, fines and step-by-step compliance in our in-depth resource.
Open full guideWhy HMO (House in Multiple Occupation) matters for landlords
HMOs carry the highest regulatory load in the PRS — fire-safety, room-size, amenity standards and council licensing on top of the usual safety stack. The mandatory HMO rule (5+ tenants, 2+ households) is the easy case; additional licensing is where landlords miss obligations because it is designated borough-by-borough and renewed in cycles. Operating without a required licence is both a civil penalty up to £30,000 and grounds for a Rent Repayment Order of up to 12 months’ rent.
Official sources
LetCompliance editorial reviews this entry every quarter against the sources above. Always confirm specific duties with a qualified solicitor or your local council.
Related terms
Council Tax
The tax charged on residential property by the local authority. Tenants are usually liable while the property is let as their main residence. Landlords become liable during void periods and for most HMOs (where each tenant has their own AST).
Landlord Licensing
Local authority schemes that require landlords to hold a licence to let property in a defined area. Three types: mandatory HMO licensing (national), additional licensing (smaller HMOs), and selective licensing (non-HMOs). Operating without a required licence carries fines up to £30,000 and can invalidate possession claims.
PAT Testing (Portable Appliance Testing)
Electrical safety testing of portable appliances (kettles, lamps, toasters) supplied with the tenancy. Not legally required for private rentals in England, but recommended good practice and sometimes required by insurers and HMO licences.
HHSRS (Housing Health and Safety Rating System)
The risk-assessment framework used by local authorities to judge whether housing is safe. It scores 29 categories of hazard, from damp and mould to falling on stairs. Category 1 hazards are the most serious and trigger enforcement powers including Improvement Notices and Prohibition Orders.
How to Rent Guide
A government checklist that landlords in England must give tenants at the start of every new assured tenancy. Available on GOV.UK as a PDF. Failure to serve it historically invalidated a Section 21 notice, and it remains a marker of a compliant tenancy setup.
Accelerated Possession
A fast-track court procedure used under a Section 21 notice in England and Wales. Abolished for new claims from 1 May 2026 because Section 21 no longer exists. Possession is now pursued under Section 8 using a specified ground.