The cost of ignoring it
The hidden cost of getting an installation wrong
Risks if left unchecked
- ●Licence refusal or revocation, properties marketed without a valid HMO licence carry fines up to £30,000 per offence.
- ●Insurance claims declined where the installed grade does not match the fire risk assessment.
- ●Personal prosecution of the Responsible Person under articles 8–22 of the RRFSO.
- ●Tenants displaced at short notice while remedial work is carried out, lost rent and reputational damage.
Common mistakes
- ●Buying a domestic kit off a DIY shelf and fitting it in a licensable HMO.
- ●Mixing manufacturers on the same loop, breaking BS 5839 compatibility rules.
- ●Skipping the design stage, sounder coverage, zoning and cause-and-effect must be documented, not guessed.
- ●Accepting a verbal handover with no certificate, log book or as-fitted drawings.
Every month an under-specified system stays in place is another month of unquantified liability. A single sleeping-risk incident in a non-compliant HMO can end a portfolio.