Apartment Blocks
Purpose-built apartment developments where sprinkler coverage is a condition of the fire safety certificate, designed to BS 9251 for life safety and property protection.
Projects
Design density, supply duration and certification route change with the occupancy. We classify the hazard first, then design to it.

BS 9251:2021
Sprinkler provision is a condition of the fire safety certificate across the residential sectors below. We design to BS 9251 for life safety and property protection.
Purpose-built apartment developments where sprinkler coverage is a condition of the fire safety certificate, designed to BS 9251 for life safety and property protection.
Cluster flats and corridor layouts with high occupancy density, where fast-response heads and coordinated detection support the evacuation strategy.
Residential care and supported-living settings with phased evacuation, restricted shutdown windows for testing and continuity of life-safety systems.
Large-scale BTR portfolios needing repeatable, standardised sprinkler design across multiple blocks, delivered to programme and budget.
There are broadly four system categories under BS 9251:2021. The category sets the coverage, the water supply duration and the certification route.
| Category | Typical application |
|---|---|
| Cat 1 | Single-family dwellings, individual flats/maisonettes, smaller HMOs/B&Bs |
| Cat 2 | Blocks of flats, small residential care premises, sheltered/extra-care housing |
| Cat 3 | Larger care premises, student accommodation, dormitories and hostels |
| Cat 4 | All residential buildings 18 m and over |
BS 9251 covers houses, apartments and residential-type accommodation. BS EN 12845 covers predominantly commercial and industrial buildings, and higher-hazard commercial areas.
We are assembling project records for publication, with client consent. If you want references for a specific sector or hazard class before you appoint, ask us and we will provide them directly.
Send the occupancy, the floor area and the stage you are at. We will tell you what the supply and certification route looks like.
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