HMO licensing is where lettings compliance stops being paperwork and becomes personal: the fines are per offence and effectively unlimited, tenants can claw back up to two years of rent, and the agency that collects the rent is liable in its own right, not just the landlord. This guide covers England's three licensing regimes as they stand in July 2026, with the statute behind every claim.
Everything here was verified against legislation.gov.uk and gov.uk guidance on 11 July 2026. This guide covers England only; Wales, Scotland and Northern Ireland run separate regimes.
What counts as an HMO, and what counts as a household
The statutory tests live in section 254 of the Housing Act 2004. In plain terms, a property is an HMO when it is occupied as a main residence by people who do not form a single household, at least one of them pays rent, and the households share (or lack) a basic amenity: a toilet, washing facilities or a kitchen. The tests cover shared houses, individual flats occupied as flat-shares, and converted buildings that are not fully self-contained. A separate test in section 257 catches poorly converted blocks of flats, which are HMOs but not subject to mandatory licensing.
A "household", under section 258, is essentially a family unit: couples, and relatives including parents, grandparents, children, siblings, uncles, aunts, nephews, nieces and cousins. The arithmetic matters more than it sounds: five friends are five households; a couple and three friends are four households; a family of five is one household and not an HMO at all.
Mandatory licensing: the five-and-two rule
Since 1 October 2018 (SI 2018/221), an HMO needs a mandatory licence in England when it is occupied by five or more people in two or more households, whatever the building's height. The old three-storey requirement is gone, which still catches out landlords who remember the pre-2018 regime: a two-storey terraced house with five sharers is squarely in scope.
The one carve-out: a purpose-built flat in a block of three or more self-contained flats sits outside mandatory licensing even with five occupiers, though additional licensing can still reach it. A shared flat above a shop, in a building with only one or two flats, is in scope.
Licences run up to five years, are per-property, and are not transferable when a property is sold or changes landlord. The licence holder (usually the landlord, though a managing agent can apply) and any manager must pass the fit-and-proper-person test.
Additional and selective licensing: the postcode lottery is the point
Two further regimes exist precisely so that councils can go beyond the national baseline, which is why "does this property need a licence?" can never be answered without asking "in which council area, this month?"
Additional licensing (section 56) lets a council designate an area, or its whole district, where smaller HMOs (three or four sharers, or section 257 conversions) also need licences. Selective licensing (Part 3) goes further still: every privately rented property in a designated area needs a licence, HMO or not, on grounds ranging from poor housing conditions to high crime or migration.
Two facts make this operationally serious in 2026. First, since 23 December 2024 councils no longer need central government approval for selective schemes of any size, so schemes are multiplying. Second, there is no authoritative national register of designations: the only reliable check is the specific council's property-licensing pages, and schemes start and lapse continuously. An agency should be able to show, for every managed property, when the scheme check was last done and what it found.
What a licence obliges you to do
Schedule 4 of the Housing Act 2004 sets mandatory conditions on every HMO licence: an annual gas safety certificate, electrical safety declarations on demand (alongside the five-yearly EICR that all private tenancies need), working smoke alarms on every storey and carbon monoxide alarms in rooms with fixed combustion appliances, safe furniture, written statements of occupation terms for occupiers, and compliance with the council's waste scheme.
Since October 2018 (SI 2018/616), licences also carry national minimum sleeping room sizes: 6.51 m² for one person over ten, 10.22 m² for two, 4.64 m² for a child under ten, and a prohibition on using rooms under 4.64 m² for sleeping at all. Floor area under a 1.5-metre ceiling does not count, which bites hard in loft conversions. Every licence also states a maximum number of occupants, and letting beyond it is a criminal offence in itself.
Penalties: the arithmetic changed in May 2026
The baseline has always been serious: operating a licensable HMO without a licence (section 72) carries an unlimited fine, and councils can impose civil penalties as an alternative to prosecution.
The Renters' Rights Act 2025 turned the dial. From 1 May 2026, the civil penalty cap rose from £30,000 to £40,000 per offence, and rent repayment orders doubled: tenants (or councils) can now recover up to two years' rent, the orders reach superior landlords rather than only the immediate landlord, and repeat offenders should expect the maximum. Councils also gained expanded investigatory powers from December 2025 and must now report their enforcement activity, which points one way: more enforcement, better funded, with bigger numbers attached.
The part agencies most often underestimate: liability is not the landlord's alone. Section 263 defines the "person managing" to include whoever receives the rent as agent, and the "person having control" as whoever receives the rack-rent whether on their own account or as agent. A rent-collecting agency on an unlicensed HMO is prosecutable in its own right. The professional response to an instruction that refuses to license is a written refusal.
Licensing is not planning, and planning is not licensing
The two regimes are independent, and confusing them is expensive in both directions. A licence does not confer planning permission; planning permission does not license anything.
On the planning side: a small HMO of three to six unrelated sharers is use class C4, and converting a family home (C3) to C4 is normally permitted development, no application needed. But where the council has made an Article 4 direction, common across university towns and much of London, that permitted development right is switched off and even a three-person HMO needs full planning permission. Seven or more occupants is sui generis: planning permission is always required, everywhere. An agency taking on an HMO should record its use class and Article 4 status next to its licence status, because a licensed HMO in planning breach is still a problem.
What changed (and did not) under the Renters' Rights Act
The Act left HMO definitions, thresholds and licence conditions untouched. What it changed is the environment: the penalty and RRO uplifts above, the abolition of section 21 and the shift of all assured tenancies to periodic (which reshapes room-let tenancy structures operationally), and, from late 2026, a mandatory private-rented-sector database in which every landlord must register, separate from and additional to HMO licensing. The ombudsman and a Decent Homes Standard for the sector follow later. For HMO-heavy agencies, the practical read is that the same obligations now carry roughly double the downside.
The agent's operational checklist
What all of this means, turned into process:
- Scheme check at instruction and renewal. Mandatory test (five-plus occupiers, two-plus households) plus a dated, recorded check of the council's additional and selective designations for that specific postcode.
- Occupancy watch per property. A fourth sharer can trigger additional licensing and planning issues; a fifth triggers mandatory licensing; a seventh makes the planning position sui generis. Track headcount and household composition, not just tenancy count.
- Licence lifecycle tracking. Expiry dates (up to five years), renewal lead time, non-transferability on sale, and evidence of duly-made pending applications, which are a statutory defence.
- Room-level records. Usable floor area per sleeping room against the 6.51/10.22/4.64 m² thresholds, excluding sub-1.5 m ceiling area, plus the licence's per-room and per-property occupancy limits.
- The compliance calendar. Annual gas certificate, five-yearly EICR, alarm checks, furniture declarations and written terms, each tracked to its own renewal cycle.
- Your own exposure. The agency is a "person managing" wherever it collects rent. Unlicensed instruction, written escalation, and if the landlord will not license, walk.
This is the workload LintelCRM's compliance module was built to carry: certificate types tracked per property with sixty days of runway before expiry, per-unit records for room-level detail, and a landlord portal where the licence-critical certificates are visible to the landlord without a phone call. The tenant portal handles the written-terms and repair-reporting side of the same obligations.
Sources
Housing Act 2004 ss.254, 258, 56, 72, 249A, 263 and Schedule 4; SI 2018/221 (Prescribed Description Order); SI 2018/616 (room sizes); Housing and Planning Act 2016 s.44 as amended; Renters' Rights Act 2025 and its implementation roadmap; MHCLG licensing reform guidance for local authorities; the selective licensing General Approval of December 2024. All on legislation.gov.uk and gov.uk, checked 11 July 2026. This guide is general information, not legal advice.