BS 5839-6 domestic fire alarm systems
BS 5839-6:2019+A1:2020 is listed by BSI as the current code of practice for design, installation, commissioning and maintenance of fire detection and alarm systems in domestic premises.
Reviewed: 20 August 2026
This guidance is general information. The correct fire safety measures depend on the premises, its use, occupants, fire risk assessment and applicable legal duties.
Where it applies
BS 5839-6 is aimed at domestic premises and differs from BS 5839-1, which covers non-domestic premises.
Grades and categories
Domestic systems are commonly described by both grade and coverage category. The grade concerns the system arrangement and power/control characteristics; LD categories describe life-safety coverage.
Current edition
BSI lists BS 5839-6:2019+A1:2020 as current. Historic systems may have been designed to earlier editions, so records should state what was installed and when.
Landlord duties are separate
Minimum smoke and carbon monoxide alarm duties for relevant landlords in England are not the same thing as a complete BS 5839-6 design or a premises-specific HMO fire strategy.
Frequently asked questions
What is the current BS 5839-6 edition?
BSI lists BS 5839-6:2019+A1:2020 as current.
Is BS 5839-6 for commercial buildings?
No. It concerns domestic premises; BS 5839-1:2025 is the current code of practice for non-domestic premises.
Sources and further reading
For legal duties and technical standards, use the current primary source and professional advice where required.