Cardiff HMO Licensing - Houses in Multiple Occupation

Housing and Building Standards Wales 4 Minutes Read · published February 12, 2026 Flag of Wales

In Cardiff, Wales private landlords and managers must follow specific rules for Houses in Multiple Occupation (HMOs). This guide summarises Cardiff Council requirements, enforcement pathways, application steps and common violations so landlords and tenants understand responsibilities and remedies. It focuses on local procedures, what counts as an HMO, who needs a licence, and how to report unsafe or unlicensed premises to the council.

What is an HMO and who needs a licence

An HMO is typically a property occupied by three or more people from more than one household who share facilities such as kitchens or bathrooms. Cardiff Council sets local licensing criteria and guidance for mandatory and additional licensing; check the council page for exact thresholds and definitions via the official information link below Cardiff Council HMO guidance[1].

Key landlord duties

  • Ensure a current HMO licence is held where required and renew on time.
  • Maintain common parts, fire precautions, gas and electrical safety and waste arrangements.
  • Provide required documents and records to the council on request, including safety certificates.
  • Respond to inspections and complaints from tenants and council officers.
Always keep safety certificates and tenancy records organised for inspection.

Penalties & Enforcement

Cardiff Council enforces HMO licensing and housing standards through its private housing and licensing teams; specific enforcement powers and sanctions are set out on the council pages cited above see official guidance[1]. Where the council page does not list a numeric sanction or fee, the exact figures are not specified on the cited page.

  • Monetary fines: not specified on the cited page.
  • Escalation: first, repeat or continuing offences and any stepped fines are not specified on the cited page.
  • Non-monetary sanctions: the council may issue improvement or prohibition notices, suspend or revoke licences, and pursue prosecutions or civil penalties; specific procedures are on the council page.
  • Enforcer: Cardiff Council Private Sector Housing / Licensing teams handle inspections and complaints; contact details are on council pages in the Help and Support section below.
  • Appeals and reviews: appeal routes and time limits vary by notice type and are not specified on the cited page; applicants should follow the appeal information provided with any notice.
  • Defences and discretion: statutory defences such as reasonable excuse or compliance steps depend on the specific notice and are covered in formal notices or by council guidance.

Applications & Forms

The council publishes application guidance and any required forms for HMO licences on its website; where a specific form number or fee is not shown on the main HMO page, it is not specified on the cited page. Applicants should use the official online application process or contact the council licensing team for the correct application pack.

  • Application form: see Cardiff Council HMO guidance and application portal for the current form.
  • Fees: any licence fee amount or fee bands are not specified on the cited page and must be confirmed with the council.
  • Deadlines: licence durations and renewal deadlines are described on the council pages or in the licence conditions supplied on grant.
  • Submission: apply using the council online portal or by contacting the licensing team as instructed on the official pages.
If in doubt, contact Cardiff Council licensing to confirm the exact form, fee and submission method before applying.

Common violations and likely outcomes

  • Operating without a required HMO licence: enforcement action, notices or prosecution are possible; specific penalties are not specified on the cited page.
  • Failure to maintain fire safety or gas/electrical certificates: remedial notices and potential prohibition or prosecution.
  • Overcrowding or unsuitable management: improvement notices and conditions on licence.

FAQ

Do all HMOs in Cardiff need a licence?
Not all HMOs require a licence; requirements depend on size and local designations, so check the Cardiff Council HMO guidance for the criteria.
How do I apply for or renew an HMO licence?
Apply through the Cardiff Council licensing process and submit required safety certificates and documents; contact details and application guidance are on the council site.
How do tenants report unsafe or unlicensed HMOs?
Report concerns to Cardiff Council’s private sector housing or environmental health teams via the council complaint and enforcement pages.

How-To

  1. Check whether your property meets the HMO definition on the Cardiff Council guidance page.
  2. Gather safety documents: gas, electrical, fire risk assessment and tenancy records.
  3. Complete and submit the council HMO application form through the official portal and pay any fee identified by the council.
  4. Allow council inspections and respond promptly to requests for additional information.
  5. If issued a notice you wish to challenge, follow the appeal information provided with the notice and seek clarification from the licensing team within the stated time limit.

Key Takeaways

  • Confirm licence requirements early by checking Cardiff Council guidance.
  • Keep safety certificates and records ready for inspection.
  • Contact Cardiff Council licensing for forms, fees and appeal information if unclear.

Help and Support / Resources

  1. [1] Cardiff Council - Houses in Multiple Occupation (HMO) guidance and licensing

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