Its a question I often get asked and to be honest, it depends on the type of HMO you have.

The main guidelines I would give you are:

Under 2-storey and less than 5 people – a normal smoke detector in hall and landings on both floors plus a heat detector in the kitchen together with fire blankets and fire extinquishers.

Over 2-storeys and more than 5 people – a Grade A LD2 system that meets BS5839 Park 6 standard with fire blankets and fire extinquishers.

What is a Grade A LD2 system – well I’ve leave it to my friends over at Wire-Free Protection to give you the jist in a non-technical easy-to-read format.

http://www.w-fp.co.uk/blog/hmos-houses-in-multiple-occupation/

Suffice to say; always shop around for fire quotes and get at least 5 – you’ll be surprised at the difference in price.  I generally pay less than £3,500 but have had quotes for up to £7,500.  A little birdie has put me in contact with a new supplier who claims to be able to install for less than £1,500 so I’m investigating and will let you know once I know more.