Two different things, always quoted together, and the reason two alarm quotes for the same building can look nothing like each other.
You do not need to memorise this. You do need enough of it to tell whether the quote in front of you matches the building you own.
| Grade | What it means in practice |
|---|---|
| Grade A | A full system with a control panel, sounders and separate detectors, designed and installed to a standard. What you would expect in a hotel or a larger HMO. |
| Grade D1 | Mains-powered interlinked detectors with a sealed backup battery. The usual answer in flats, holiday lets and small rented property in Wales. |
| Grade D2 | As above but with a replaceable battery backup. |
| Grade F | Battery-only detectors. Rarely acceptable in anything let commercially. |
| Category | Coverage |
|---|---|
| LD1 | All circulation areas plus all rooms where a fire might start. The most comprehensive. |
| LD2 | Circulation areas plus the higher-risk rooms, typically kitchen and lounge. The common answer in let property. |
| LD3 | Circulation areas only, so detection covers the escape route and nothing else. |
Separately from the Fire Safety Order, the Renting Homes (Wales) requirements have applied since 1 December 2022: mains-wired interlinked smoke alarms on every storey of a rented dwelling, carbon monoxide alarms in any room with a fuel-burning appliance, and an electrical condition report every five years. Different law, same visit.
Two contractors can look at the same three-storey house and quote a Grade D1 LD2 and a Grade A LD1 respectively, and both can be defensible. The difference is what they assumed about the escape route and about who is sleeping there.
That is what the assessment settles. Once it says what the building needs and why, you can compare quotes on price rather than on guesswork, which usually saves more than the assessment cost.
The grade describes the kit: how the system is powered and monitored. The category describes the coverage: which parts of the building have detectors in them. You need both to specify a system, and quotes that only mention one are hard to compare.
Detection in the circulation areas that form the escape route, plus detectors in the rooms that present the highest risk, typically the lounge and the kitchen. LD3 covers only the escape route. LD1 covers essentially everywhere.
Usually not. Most self-catering properties are served by mains-powered interlinked detectors rather than a panel. The exception is larger or more complex properties, where a panelled system starts to make sense.
The fire risk assessment does, by looking at the layout, the storeys, whether the escape route is protected and who is sleeping there. Beware anyone who quotes a grade before they have seen the building.
Tell us the building and we will give you a price on the phone. Most assessments are booked within the week.