Report Unsafe Buildings - Cardiff Council Bylaws

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

In Cardiff, Wales, property owners and members of the public must report dangerous or unsafe buildings to the local authority so hazards can be inspected and remedied. This guide explains who enforces building safety in Cardiff, the typical enforcement outcomes, how to report an urgent hazard, and the actions you can take as a resident, business or occupier.

When to report an unsafe building

Report buildings or structures that are at risk of collapse, have falling masonry, significant fire damage, or features that endanger passers-by or neighbouring property. If there is an immediate risk to life or a serious incident, call the emergency services first.

How reports are handled

Cardiff Council’s Building Control team and, where relevant, Environmental Health assess reported hazards, arrange inspections and decide on emergency measures such as cordons or temporary supports. Reports can be made online or by telephone through the council’s building control/contact pages Cardiff Building Control[1]. The statutory powers that give local authorities authority to deal with dangerous buildings are set out in national legislation and applied by the council when required Building Act 1984[2].

Penalties & Enforcement

Local enforcement combines immediate safety work, formal notices and, where the legislation allows, financial penalties or prosecution. The council may serve notices requiring remedial works and carry out emergency repairs if the owner does not act.

  • Fines and penalties: specific fine amounts are not specified on the cited Cardiff Council page for dangerous buildings; see the council contact page for details and case-specific information.[1]
  • Escalation: first notices, compliance periods, repeat or continuing offence procedures are used where appropriate; precise escalation ranges are not specified on the cited page.[1]
  • Non-monetary sanctions: remedial or emergency works orders, demolition orders, temporary supports or cordons, and prosecution in the magistrates’ or Crown Court where required.
  • Enforcer and inspections: Building Control (Cardiff Council) leads inspections and enforcement; Environmental Health may be involved for health hazards. Use the council contact page to submit a complaint or request an inspection. [1]
  • Appeals and reviews: appeal routes depend on the notice type and legislation used; time limits for appeals are case-specific and not specified on the cited Cardiff page, so contact the council for precise deadlines.[1]
  • Defences and discretion: the council applies discretion, and defences such as a "reasonable excuse" or applying for a remedial consent/variance may be available under relevant legislation; specific defences are governed by national law referenced by the council.[2]
If immediate danger exists, call emergency services and then notify the council.

Applications & Forms

For emergency action the council typically does not require a separate public form beyond the initial report; specific application forms for formal notices or building control consents are published by the council where required. If a named form or fee is required for a particular remedial consent, that information will appear on the council’s Building Control pages; where the council does not publish a form for dangerous building reports, report by phone or the online contact method listed on the council page.[1]

Action steps to report an unsafe building

  • Assess urgency: if life is at risk, call 999 immediately.
  • Report to Cardiff Council Building Control by phone or the online reporting page and provide location, description and photos where safe to do so.[1]
  • Keep records: note dates, times and any council reference numbers for the complaint.
  • Follow instructions: if the council issues a cordon or closure, comply and keep clear of the area until the authority confirms it is safe.

FAQ

Who enforces unsafe building rules in Cardiff?
The Building Control team at Cardiff Council enforces building safety; Environmental Health may also act for health-related hazards.[1]
How quickly will the council respond?
Response times depend on risk: immediate dangers are prioritised; the council’s published timescales for inspections are case-specific and should be confirmed via the contact page.[1]
Can the council force repairs?
Yes, the council can serve notices and carry out emergency works if owners do not comply, then recharge costs to the owner as allowed by law.[2]

How-To

  1. Identify the hazard and check for immediate danger; call 999 if life is at risk.
  2. Take safe photos and notes of location, condition and any risks without entering unsafe areas.
  3. Report the issue to Cardiff Council Building Control via the online contact form or by phone and give all evidence and contact details.[1]
  4. Keep a record of the council reference and follow up if you do not receive an acknowledgement within the council’s stated timescale.
  5. If the council issues a notice you disagree with, ask for a review and follow published appeal routes; seek legal advice for formal appeals.

Key Takeaways

  • Report dangerous structures to Cardiff Council promptly and call emergency services for immediate risk.
  • Building Control leads enforcement; the council can impose works and pursue costs or prosecution.

Help and Support / Resources


  1. [1] City of Cardiff - Building Control and reporting pages
  2. [2] Building Act 1984 - legislation.gov.uk