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220 Montgomery St
San Francisco, CA 94104 Union Square

$78,302 USD/MO

Office For Lease  •  3,506+ SF

Property Details

  • Property Type Office
  • Year Built 1892
  • Total Building Size 491,624 SF
  • Tenancy Multiple
  • Building Class B
  • Zoning C3O
100 Transit Score
100 Walk Score

12 Spaces Available

Name Space Use Size Rent Details
3rd Floor Ste 300 Office 4,821 SF $68.00 USD/SF/YR 
NEW SPEC - 3 meeting rooms/offices,1 conference room, kitchen, open areas, space for 32 workstations,storage. Can be combined with Suite 305 for a total of 8,327 RSF

  • Date available: May 2026
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: New
  • In Contiguous block: 8,327 SF
3rd Floor Ste 305 Office 3,506 SF $68.00 USD/SF/YR 
NEW SPEC - 3 meeting rooms/offices, 1 conference room, kitchen, open area, space for 24 workstations. Can be combines with Suite 300 for a total of 8,327 RSF.

  • Date available: May 2026
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: New
  • In Contiguous block: 8,327 SF
3rd Floor Ste 346 Office 3,544 SF $29.00 USD/SF/YR 
2 private offices, kitchen, open area.

  • Date available: Now
  • Lease term: 2 - 3 Years
  • Service type: Full Service Gross
  • Built out as: Standard Office
  • Space Type: Relet
3rd Floor Ste 360 Office 3,635 SF $68.00 USD/SF/YR 
NEW SPEC - 2 meeting rooms/offices, 1 conference room, open area, space for 28 work stations, break area.

  • Date available: May 2026
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: Relet
4th Floor Ste 400 Office 4,579 SF $67.00 USD/SF/YR 
NEW SPEC - 3 meeting rooms/offices, 1 conference room, kitchen, open area, two sides of windowline, some exposed brick, Montgomery street outlooks, future spec suite, space for 12 work stations, furnished.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: Relet
5th Floor Ste 500 Office 40,951 SF Rate Upon Request 
Full floor identity, professional services suite, 87 offices/meeting rooms (67 exterior), large board room, 3 conference rooms, training room, large break area, operable windows for fresh air circulation, full height windows surrounding the premises, full A/C and heating system.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: To Be Determined
  • Built out as: Professional Services
  • Space Type: Relet
6th Floor Ste 645 Office 13,818 SF $68.00 USD/SF/YR 
Suite 645 is a 2nd generation creative space with exposed brick, high ceilings, above-standard finishes, an open kitchen/break area, six private offices, two conference rooms, operable windows, and abundant natural light. Located in the core of San Francisco’s Financial District. Updated lobby, tenant lounge, and state-of-the-art conference center. Abundant natural light with beautiful interiors.

  • Date available: Sep 2026
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Built out as: Standard Office
  • Space Type: New
7th Floor Ste 700 Office 40,642 SF Rate Upon Request 
MOVE-IN READY - FF&E POSSIBLE - Full floor identity, creative suite with exposed brick and high concrete ceilings, 8 offices/meeting rooms, 21 conference rooms, 15 phone, large kitchen/all-hands area, operable windows for fresh air circulation, abundant natural light provided by 2 internal lightwells and oversized windows.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: To Be Determined
  • Space Type: Relet
10th Floor Ste 1000 Office 4,826 SF $67.00 USD/SF/YR 
- Brand New Spec Suite Available Dec 2025
- High Ceilings
- 4 Meeting Rooms/Private Offices
- 1 Conference Room
- Open Kitchen Area
- Open Area for Workstations
- Double Door Elevator Identity
- Excellent Montgomery Street Window-line
- Access to New 10th Floor Tenant Lounge
- Furnished

  • Date available: Now
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: Relet
10th Floor Ste 1060 Office 5,543 SF $50.00 USD/SF/YR 
NEW SPEC - Creative furnished spec with elevator identity, 3 meeting rooms, open kitchen, open work area with 40 desks. Adjacent to new 10th floor tenant lounge. Exposed ceilings.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: Relet
12nd Floor Ste 1200 Office 6,027 SF $68.00 USD/SF/YR 
NEW SPEC - Boardroom & 4 meeting rooms/offices. Exposed ceiling and brick, great natural light. Furnished.

  • Date available: Jun 2026
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: Relet
17th Floor Ste 1700 Office 5,928 SF $65.00 USD/SF/YR 
1 conference room, 4 meeting rooms/offices, kitchen, restrooms in suite, three sides of window line, full floor opportunity, nice views.

  • Date available: Now
  • Lease term: Negotiable
  • Service type: Full Service Gross
  • Space Type: Relet

Description 

The Mills Building is a combination of historic prominence and modern amenities in San Francisco’s Financial District. With its rich history and legacy of success, this landmark offers today’s tenants an inviting and inspiring mix of modern amenities, historic charm, and a convenient location in the heart of the Financial District. As San Francisco’s last remaining example of the early 20th-century Chicago School architectural style, this destination has been continuously owned and operated by The Swig Company since 1954. It has been meticulously renovated over the years, including upgrades to the building systems, main lobby and common areas, and tenant amenities. 
        
Offering an elevated workplace experience, The Mills Building offers renovations that provide highly efficient and effective office solutions for a broad range of businesses. The new updates delivered modern updates to the lobby, as well as a new amenity center featuring expanded bike storage, a state-of-the-art conference center, a tenant lounge, and a wellness area with showers and lockers. This office destination echoes a commitment to environmental stewardship, positive social impact, and tenant well-being that creates value for tenants. 
       
The Mills Building is situated in the heart of downtown on one of the city’s most vibrant retail and business corridors, with abundant parking and valet. Tenants have easy access to the Montgomery BART and California and Montgomery MUNI Stations for those comminuting from the neighboring Bay Area communities. A host of dining, refreshment, fitness, and service options surrounds this central office’s prominent and accessible location in San Francisco proper. Discover the perfect blend of history, innovation, and convenience at The Mills Building, where businesses thrive in the heart of San Francisco’s dynamic Financial District.

Highlights

Embark on modern office amenities and contemporary ambience with a rich variety of large and small suites in a unique architectural setting.
Impeccably renovated building with an updated lobby and new conference center, bike storage, wellness room, and shower/locker facilities.
The Mills Building is one of the first three steel-frame buildings in San Francisco and remains essentially indistinguishable from its original state.
Identifiable presence with ground-floor retail on Montgomery Street joins neighboring amenities such as Blue Bottle Coffee, Equinox, and FedEx.
Be amazed by high ceilings, abundant natural light, robust data infrastructure, beautiful interiors, and a LEED Platinum/WELL Health-Safety rating.
Centrally located in the Financial District, a block from the Montgomery Street BART and MUNI Stations neighboring SOMA, Chinatown, and Union Square.

Property Flyers

Green Rating

EnergyStar Yes LEED Platinum

Amenities

  • 24 Hour Access
  • Atrium
  • Controlled Access
  • Concierge
  • Conferencing Facility
  • Courtyard
  • Fitness Center
  • Property Manager on Site
  • Restaurant
  • Security System
  • Signage
  • Energy Star Labeled
  • Wheelchair Accessible
  • Reception
  • Storage Space
  • Car Charging Station
  • Smoke Detector

Public Transportation

Commuter RailDriveWalkDistance
San Francisco Caltrain Station Southbound (Express - Caltrain (Caltrain), Limited - Caltrain (Caltrain), Local Weekday - Caltrain (Caltrain), Local Weekend - Caltrain (Caltrain)) 4 min - 1.5 mi
Bayshore Caltrain Station Southbound (Local Weekday - Caltrain (Caltrain), Local Weekend - Caltrain (Caltrain)) 12 min - 6.7 mi
Transit/SubwayDriveWalkDistance
California St & Montgomery St (CALIFORNIA STREET CABLE CAR - San Francisco Municipal Transportation Agency) 1 min 2 min 0.1 mi
California And Montgomery (California Street Cable Car - San Francisco Municipal Railway (MUNI Metro)) 1 min 2 min 0.1 mi
California St & Sansome St (CALIFORNIA STREET CABLE CAR - San Francisco Municipal Transportation Agency) 1 min 2 min 0.1 mi
Montgomery Station (Dublin/Pleasanton - Millbrae - Bay Area Rapid Transit (BART), Fremont - Daly City - Bay Area Rapid Transit (BART), Pittsburg/Bay Point - San Francisco International - Bay Area Rapid Transit (BART), Richmond - Millbrae - Bay Area Rapid Transit (BART)) 0 min 5 min 0.3 mi
Market And 2Nd (F Market - San Francisco Municipal Railway (MUNI Metro)) 1 min 5 min 0.3 mi
AirportDriveWalkDistance
San Francisco International 23 min - 14.5 mi
Metro Oakland International 29 min - 19.0 mi

Parking Details

Parking Available: Yes
Reserved: No
Type: Surface
Included in Rent: Yes
Mark Geisreiter 628-241-0135 Newmark
Mark Geisreiter 628-241-0135 Newmark