685 Market Street

San Francisco, California

The Monadnock Building opened its doors for business in 1907, having withstood the great San Francisco earthquake and fire of 1906 while under construction. The Monadnock Building is one of the first steel frame, concrete encased buildings erected in San Francisco. The Monadnock Building, which over time was home to the executive offices of the nation’s largest railroads, a Prohibition-era speakeasy and a legendary jazz club, flourished for decades until falling into disrepair in the latter half of the century. In 1977, the then-owner, unwilling to renovate the building, was persuaded by the architectural firm of Whisler-Patri to sell the building rather than tear it down. The Monadnock Building was sold to a private investor who subsequently sold it to the AT&T pension fund in 1986. The Monadnock Building was then completely renovated, modernized and restored to its original grandeur by the architectural firm of Whisler-Patri and Charles Pfister. The Monadnock Building is now considered an historical landmark building. It is centrally located in downtown San Francisco, with close proximity to the North Financial District, Union Square and the Moscone Convention Center. As one of the premier Class B buildings in San Francisco, The Monadnock Building has excellent accessibility to all forms of public transportation, including BART, MUNI, and the historic Street Cars that run from Fisherman’s Wharf to the Castro.

Image of 685 Market

Building Details

Neighborhood amenities

  • Chinatown San Francisco
  • Embarcadero Train Station
  • Fisherman's Wharf
  • Joice Street Steps
  • Magic Bus San Francisco
  • Martin Luther King Jr. Memorial
  • Museum of Modern Art
  • Musical Stars
  • PIER 39
  • The San Francisco Dungeon

Hours of operation

Management office
Monday - Friday 8:00AM - 6:00PM
Weekends & holidays Closed
Building access
Monday - Friday 6:00AM - 7:00PM
Saturday 8:00AM - 2:00PM
Sunday & Holidays Closed
Monday - Friday 7:30AM - 6:00PM
Saturday 9:00AM - 2:00PM
Sunday & Holidays Closed

Meet our team

Frank Miskus, Senior Property Manager


Tony Alvarado, Security Site Supervisor


Image of interior greenspace with benches and industrial lighting fixtures

Certificates & designations

Leading the charge in best in class building operations and sustainable practices it’s always good to be recognized. What does that mean? Well, it means we pursue certifications like LEED in our landmark addresses to show you we are operating sustainably. Here we have achieved LEED EB:OM Platinum! We’ve also become Energy Star rated and, most recently we’ve had our entire North American portfolio WELL Health Safety Rated to confirm that we’ve put your health and safety first.

LEED Platinum 2018 bilingual logo
Energy star logo
WELL Health Safety Rating logo

Sustainability at 685 Market Street

We’re committed to bringing responsible environmental solutions and innovative energy saving strategies to our tenants. And to our neighbors in the surrounding communities. Learn how we’re building a better world.

The Brookfield Properties Office Division is part of the larger Brookfield Properties global real estate services company that provides best in class management and development capabilities on behalf of Brookfield Asset Management.  As such, we are proud that the environmental performance of our portfolio directly contributes to Brookfield Asset Management’s Environmental, Social, and Governance best practices. Visit the Brookfield Asset Management 2020 ESG Report to learn more about the positive impacts we are helping to make.

Decorative image of an office space with black leather and rosewood midcentury modern chairs and a growing green wall
Image of a man using a tablet with a cappuccino ready for the first sip

Building Resources

Your one stop shop for all building forms and manuals. Don't see what you're looking for? Contact the management office.

Building forms

  • Property removal
  • Tenant contact information

Building resources

Service Requests

We deliver the highest quality of services to our tenants. By utilizing the Angus Anywhere software platform to respond to tenant service requests, our customer service representatives manage your service and maintenance requests 24/7.

Lights out in your boardroom? A spill on the concourse? Submitting service requests is quick and simple in app or online.

Image of a happy woman in a canadian tuxedo
Image of turnstyles at an elevator lobby

Fire, life & safety

Security officers are on duty at the Building’s Security Console and tour throughout the property and garage twenty-four hours a day, seven days a week. The Building also employs electronic surveillance devices throughout certain common areas. Two-way radio communication between the Management Office, Security Console and property staff provide quick response to any issue.

While security officers, closed circuit cameras and the maintenance staff can provide basic protection for the Building, security is everyone's responsibility and your cooperation and vigilance is essential.

Emergency resources

Emergency contacts

  • All Emergencies: 911
  • Building Management Office: 415-344-0004

Resource links