HMO EICR Requirements

What counts as an HMO?

Houses in Multiple Occupation face a level of regulatory scrutiny that goes well beyond standard rental properties — and electrical safety is no exception. HMOs carry higher occupancy, shared facilities, and greater fire risk, which is why local authorities and the government apply stricter rules.

A property is classified as an HMO if it is occupied by three or more people forming two or more separate households who share basic amenities such as a kitchen, bathroom, or toilet. This includes shared houses, bedsits, and some converted flats that do not meet the 1991 Building Regulations standard.

Mandatory licensing applies to larger HMOs — properties occupied by five or more people from two or more households. These require a licence from the local authority regardless of location. Many councils also operate additional licensing schemes extending the requirement to smaller HMOs with three or more occupants.

Definitions vary between England, Scotland, and Wales. In Scotland, any property let to three or more unrelated tenants requires an HMO licence. If unsure, check with your local authority — getting it wrong can result in unlimited fines and rent repayment orders.

Why HMOs need extra attention

Higher occupancy, shared facilities, and older converted properties combine to make electrical safety significantly more important — and more likely to reveal issues — than in standard rental properties. Electrical faults are a leading cause of fires in HMOs.

Higher occupancy means higher electrical load. More tenants means more appliances, simultaneous usage, and strain on circuits designed for a single household. Circuits in HMOs commonly operate at or near capacity, especially in older properties.

Shared facilities drive constant circuit usage. Communal kitchens, bathrooms, and laundry areas see far heavier use than their equivalents in a single-family home. Appliances in shared kitchens may run almost continuously during peak hours.

Tenants may use high-draw appliances in bedrooms. Electric heaters, cooking appliances, and multiple devices on extension leads in individual letting rooms can overload circuits designed for lighting and a few sockets.

Multiple consumer units are common. Many HMOs — especially converted properties — have more than one consumer unit serving different parts of the building. This adds complexity and increases the likelihood of finding inconsistencies or faults.

Older converted properties may have DIY or non-compliant work. Properties converted from single dwellings often have electrical work carried out by previous owners or unqualified individuals. Breached fire barriers, incorrect cable routing, and missing RCD protection are common findings.

Local authorities are well aware of these risks and actively inspect and enforce electrical safety standards in HMOs. Non-compliance can result in prosecution, civil penalties, and revocation of the HMO licence.

HMO EICR cost and common failures

An HMO EICR is typically more expensive than a standard residential inspection. Standard domestic EICR might cost £150–£250; HMO EICR typically £250 to £500+ depending on size and complexity.

Higher cost reflects additional work: multiple consumer units, more circuits to test, larger installations with more outlets and lighting points, and more rooms requiring individual inspection. Three-phase supplies, sub-mains between floors, or complex fire alarm circuits push costs higher. Bedrooms and overall layout are the main cost drivers. See our EICR cost guide. EICR cost is separate from remedial work.

Common HMO EICR failures:

• Missing RCD protection on individual letting rooms — each room circuit should have RCD protection. Older consumer units pre-dating current requirements often lack adequate coverage — typical C2 code.
• Overloaded circuits — circuits designed for a single household now serving multiple tenants with high-draw appliances. Warm cables, tripping MCBs, discoloured connections.
• Breached fire-stopped cable routes — cable routes must maintain fire compartmentation. Holes drilled through fire-resistant walls and floors for unsealed cable runs are common and serious findings.
• Missing fire detection circuits — fire alarm circuits incomplete, not properly interlinked between floors, or tampered with by tenants.
• Inadequate earthing in converted properties — earthing that was adequate for the original single dwelling but insufficient for increased HMO load and complexity.
• Non-compliant DIY electrical work — unapproved additions and modifications without Building Control notification. Replacement consumer units fitted without certification, wrong cable types or ratings.

If your EICR is Unsatisfactory, you have 28 days (or less if specified) to complete remedial work. See our EICR codes explained guide. HMO landlord? Get an HMO EICR quote — we handle multi-unit properties with multiple consumer units.