Do I need fire doors and smoke detectors?
A loft conversion is considered a third storey for your Brighton home. You have to install a wide fire-escape window and fire doors that can withstand heat for 30 minutes. One will be installed at the top of the new stairs and doors in all the rooms of the house. You also need smoke alarms in your loft. It should be wired to the main control and include a backup battery for power supply.