Designed by Robert D Henry Architects, The Setai development’s 12,000sq ft (1,114sq m) Daniela Steiner spa will be one of New York City’s largest private spas in a residential building, when it opens late in 2009.

The spa’s water suite will include teak-wood chaise longues and marble platforms with glass-mosaic spa pools.

There will also be a tea lounge, four wet treatment rooms with large soaking tubs and deluge showers, and a number of dry treatment rooms with leather flooring. A single treatment room will be set aside for signature Daniela Steiner facials. The spa will also incorporate a fitness centre.

Other facilities will include a furnished, rooftop sky lounge, which will be enclosed by floor-to-ceiling glass windows that can open onto an exterior roof deck. Details: rdh-architects.com