Spiral Staircases
Spiral staircases are a great space saver as they are made of a central pole and steps that are revolving around it.
Spiral staircases are restricted in their diameter since all steps are supported by the central pole. They are great to allow sunlight to penetrate inside the property and can have customized threads and balustrades. Fast to assemble, but difficult to design and can be expensive. Ideal for gardens, offices and small urban homes.