HMO Licence Penalties: Why Non-Compliance Is Not Worth the Risk

The consequences of operating an unlicensed HMO have never been more serious, and they became significantly more serious again with the Renters' Rights Act 2025. London councils are increasingly proactive in identifying unlicensed properties, and the financial exposure for getting licensing wrong now sits well above what many landlords assume.

Financial penalties — the tiered structure since May 2026

Until 1 May 2026, councils could impose civil penalties of up to £30,000 per offence for operating an unlicensed HMO. The Renters' Rights Act 2025, which received Royal Assent on 27 October 2025, replaced that single ceiling with a tiered structure once its landlord-facing provisions commenced on 1 May 2026: up to £7,000 for minor or initial non-compliance, rising to up to £40,000 for serious, persistent or repeat non-compliance. Criminal prosecution remains available as an alternative route in the most serious cases, sitting alongside rather than instead of the civil penalty option.

The move to a tiered structure was intended to make the penalty proportionate to the conduct rather than applying the same maximum figure to a landlord who missed a renewal deadline by a few weeks and one who has operated an unlicensed HMO for years despite council warnings. The top of the new tier is materially higher than the previous flat cap, reflecting the view that the old £30,000 ceiling was not always a sufficient deterrent.

Multiple breaches mean multiple penalties

A single inspection can uncover more than one offence at the same property — operating unlicensed and breaching overcrowding standards, for example, or unlicensed operation alongside a failure to meet the mandatory conditions on fire safety equipment. Each distinct breach can attract its own separate penalty rather than being treated as one combined offence, so the total financial exposure at a single property can climb well beyond the headline £40,000 figure for a single offence, and in extreme cases can exceed the value of the property itself.

Rent Repayment Orders now reach 24 months

Under sections 40 to 45 of the Housing and Planning Act 2016, tenants and local authorities can apply to the First-tier Tribunal for a Rent Repayment Order against a landlord who let an unlicensed HMO. Before 1 May 2026, a successful order was capped at 12 months' rent, with a 12-month window in which to bring the claim. Since the Renters' Rights Act 2025 provisions commenced, the cap has doubled to 24 months' rent — or the rent actually paid, if that figure is lower — and the window to bring a claim has extended to 24 months after the relevant period.

Because the claim window itself has also been extended to 24 months, tenants who move out of an unlicensed HMO retain a longer period in which to bring a claim than they did before 1 May 2026. Historic non-compliance can resurface as a claim well after a tenancy has ended and a property has changed hands to new tenants.

Tenant awareness makes no difference

A Rent Repayment Order is available whether or not the tenants knew the property was unlicensed, and whether or not they were otherwise satisfied with it. A landlord cannot defend a claim on the basis that tenants never complained, paid on time, or were happy with the accommodation — the offence is the absence of a licence, not the tenant's experience of living there.

Banning orders remove landlords from the market entirely

Beyond financial penalties, councils can seek a banning order against a landlord following certain offences, including unlicensed HMO operation. A banning order prohibits a person from letting or managing residential property in England, and once one is in place the landlord is required to sell or transfer their rental properties rather than continue operating them.

Because a banning order applies to the person rather than a single property, it extends across a landlord's entire portfolio. A banning order triggered by one unlicensed HMO does not just require that property to be sold — it removes the individual's ability to let or manage any residential property in England going forward.

Criminal prosecution as an alternative route

In the most serious cases — persistent non-compliance, repeat offending, or aggravating factors such as harassment of occupiers — councils can pursue criminal prosecution instead of a civil penalty. A conviction for HMO offences can result in an unlimited fine and a criminal record, and can itself be a trigger for a banning order application.

Why enforcement has become more proactive

London boroughs have shifted resources toward identifying unlicensed properties directly, rather than waiting for tenant complaints, partly because the public HMO register that every licensing council must maintain makes it straightforward to cross-reference licensed addresses against other data sources, such as council tax records or planning applications for HMO conversions. A property that has quietly operated as an unlicensed HMO for years is now considerably more likely to be identified than it once was.

The introduction of the public register, which shows the address, licence type, licence holder, maximum permitted occupants and expiry date for every licensed property, has also made it easier for tenants, neighbours and rival landlords to spot when a property appears to be operating as an HMO without a corresponding entry.

The lesson: compliance costs a fraction of non-compliance

Against a potential civil penalty of up to £40,000 per offence, a Rent Repayment Order reaching 24 months' rent, or a banning order that forces a sale, the cost of a licence application is negligible. Our fixed fees of £300+VAT for an additional HMO licence and £500+VAT for a mandatory HMO licence are a rounding error next to the financial exposure of operating unlicensed, even before accounting for the risk of prosecution or a banning order.

If you are unsure whether your property needs a licence, or your existing licence has lapsed, contact us for a free assessment before a council inspection finds the answer for you.