56 Mars Street

1. c. 1895

   Standing in a photograph of Mars Street from Kite Hill (OpenSFHistory wnp27.6091).

   Corbett Heights Neighbors, "January Neighborhood News", Vol. VIII, No. 1 (1 January 2026)
2. 1900

   Built.

3. April 1906

   Visible above the earthquake refugee camp at Corbett and Mars (OpenSFHistory wnp37.00189).

   Corbett Heights Neighbors, "January Neighborhood News", Vol. VIII, No. 1 (1 January 2026)
4. 1912

   Photographed at close range with 52 and 64 Mars, already altered (San Francisco History Center, SFPL).

   Corbett Heights Neighbors, "January Neighborhood News", Vol. VIII, No. 1 (1 January 2026)
5. Dec 1990

   Illegal kitchen removed and a new wall built to close the room.

   Complete Permit 9024908 $$$ $2,500
6. Dec 2009

   Three worn stair treads replaced.

   Complete Permit 200912113075 $$$ $200
7. Jan 2010

   56A Mars Street assigned as the legal address of the rear unit.

   Issued Permit M187966
8. Jan 2010

   Two bathrooms and the kitchen remodelled.

   Complete Permit 201001124542 $$$ $20,000
9. Jul 2010

   Rock intrusions removed from the lower level; new foundations and concrete floor slabs.

   Complete Permit 201007156722 $$$ $75,000
10. May 2022

    Horizontal addition of 670 sq ft above 56 and 56A Mars Street.

    Issued Permit 202205254962 $$$ $367,835

The assessor records 1900; the c. 1895 photograph shows the house already standing. The assessor's 1900 date is later than the photograph of about 1895 in which the house already appears.