Space Saving Staircases take around half the space to rise as conventional staircases.
Space Saving Staircases are suitable for loft conversions where you don’t have the space for a conventional staircase.
Technically a Space Saving Staircase is known as a alternating tread staircase.
For Building Regulations a Space Saver staircase can only be used for access to a single bedroom this room can have a WC but this bust not be the only WC in the property.
Another requirement for Building Regulations is that each step requires anti-slip for safety.
You also need to have handrails to both sides of the stairs