The Infinity or 300 Spear Street is a mixed-use residential condominium development in San Francisco, California  consisting of 2 high-rise towers and 2 low-rise buildings. The four buildings contain 650 residential units. The complex is the first phase of a massive residential development encompassing two city blocks.

General information
Status	Complete
Type	Residential condominiums
Architectural style	Modernism
Location	160 Folsom Street San Francisco, California
Coordinates	37.7894°N 122.3910°WCoordinates: 37.7894°N 122.3910°W
Construction started	2005
Completed	2008
Owner	Tishman Speyer Properties
Height
Roof	Tower I: 106.7 m (350 ft) Tower II: 128.9 m (423 ft)
Technical details
Floor count	Tower I: 37 Tower II: 41
Floor area	148,645 m2 (1,600,000 sq ft)
Lifts/elevators	14
Design and construction
Architect	Heller Manus Architects Arquitectonica
Developer	Tishman Speyer Properties
Structural engineer	Magnusson Klemencic Associates
Main contractor	Webcor Builders
Other information
Number of units	650