Penalty for Unlicensed HMO in Hounslow: Fines, Prosecution and Civil Penalties

Operating an unlicensed HMO in Hounslow is not a paperwork oversight the council ignores. The Housing Enforcement Team actively identifies unlicensed properties through Council Tax records, housing benefit data and tenant complaints, and the penalties they impose are designed to hurt more than the licence fee would have cost.

The Penalty Framework

Under section 72 of the Housing Act 2004, operating an HMO without a licence is a criminal offence. Hounslow Council has two routes for enforcement:

Criminal prosecution — conviction carries an unlimited fine. This route is typically reserved for the most serious cases: large-scale unlicensed operations, repeat offenders, or properties with severe safety hazards.

Civil financial penalty — up to £40,000 per offence under section 249A. This is the more commonly used route. The council issues a Notice of Intent, followed by a Final Notice after considering any representations. A 15% discount applies if the penalty is paid within 28 days of service of the Final Notice.

These are alternatives, not cumulative — the council chooses one route per offence. But each property and each period of unlicensed operation can be treated as a separate offence, so a landlord with two unlicensed properties faces two potential penalties.

How the Council Sets the Amount

Hounslow's Civil Penalty Policy assesses each case on five factors:

1. Culpability — did the landlord know about the licensing requirement? Deliberate avoidance attracts higher penalties than genuine ignorance.
2. Harm — were tenants at risk from poor conditions, overcrowding or missing safety systems?
3. Track record — first offence or repeat? Previous enforcement actions push the penalty upward.
4. Financial gain — how much rent did the landlord collect while unlicensed? Penalties aim to exceed the profit from non-compliance.
5. Deterrence — the penalty must discourage both the individual landlord and others in the borough from non-compliance.

A three-bedroom house let to three sharers at £600 per room collects £21,600 a year in rent. A civil penalty even at £20,000 — half the maximum — represents less than one year's gross rental income. The council's penalty guidance is explicitly structured to ensure non-compliance does not pay.

Rent Repayment Orders

On top of council enforcement, tenants have their own remedy. Under sections 73–74 of the Housing Act 2004, as expanded by the Renters' Rights Act 2025, a tenant living in an unlicensed HMO can apply to the First-tier Tribunal for a Rent Repayment Order (RRO) worth up to 24 months' rent.

The tenant does not need the council to prosecute first. They can apply independently, and the tribunal decides the amount based on the landlord's conduct and circumstances. The council can also apply for an RRO on behalf of housing benefit payments.

For a property charging £600 per room per month with three tenants, 24 months' rent across all tenants is £43,200. Combined with a civil penalty, the total financial exposure from operating unlicensed can exceed £80,000.

Further Enforcement Powers

Beyond penalties and RROs, the council can:

• Issue an Interim Management Order under Part 4 of the Housing Act 2004, taking direct control of the property
• Seek a Banning Order under the Housing and Planning Act 2016, which adds the landlord to the national rogue landlord database and prohibits them from letting or managing property
• Restrict possession proceedings — an unlicensed landlord cannot use certain Section 8 grounds to regain possession

The Duly Made Application Defence

A key statutory protection is section 72(4) of the Housing Act 2004: once you submit a valid ("duly made") application — meaning the form is complete, required safety certificates are uploaded and the fee is paid in full — you are protected from prosecution or civil penalty while the application is pending.

This protection does not apply retroactively. If you operated without a licence for six months and then applied, the council can still pursue penalties for the unlicensed period before your application date. The protection only covers the period from submission onward.

Getting a complete application submitted as quickly as possible — with all documents gathered beforehand — is the single most effective way to limit your enforcement exposure. The Hounslow Landlord Licensing Guide includes a document assembly checklist and portal walkthrough designed to get you to "duly made" status without delay.

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