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100 B St 46,234 SF 23% Leased Office Building Santa Rosa, CA 95401 For Sale

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Investment Highlights

  • Offered with vacant delivery option supporting redevelopment or owner-user occupancy.
  • Strategic downtown location adjacent to retail, transit, parking, and civic amenities.
  • CMU zoning allowing mixed-use, residential, civic, and institutional uses by right.
  • Adaptive reuse potential aligned with Santa Rosa planning goals for downtown activation.

Executive Summary

Offered for sale is a strategically located, Class B, downtown office building with significant repositioning and reuse potential. 100 B Street is a four-story office property designed for multi-tenant occupancy, currently demised across multiple suites and rentable spaces, and can be delivered fully vacant to accommodate a buyer’s operational timeline and redevelopment strategy. Centrally positioned in Santa Rosa’s core commercial district, immediately adjacent to major retail, civic services, transit, and hospitality amenities. Walking distance to Santa Rosa Plaza, public parking garages, and the downtown transit mall — delivering high pedestrian visibility and accessibility. Easy access to US Highway 101 and Highway 12 connections, enhancing regional connectivity.

Property Facts

Sale Type
Investment or Owner User
Property Type
Office
Building Size
46,234 SF
Building Class
A
Year Built
1988
Percent Leased
23%
Tenancy
Multiple
Building Height
4 Stories
Typical Floor Size
11,558 SF
Building FAR
3.42
Lot Size
0.31 AC
Opportunity Zone
Yes
Zoning
C2, Santa Rosa - Commercial
Parking
100 Spaces (2.05 Spaces per 1,000 SF Leased)

Amenities

  • Kitchen
  • Fully Carpeted
  • Natural Light
  • Drop Ceiling
  • Air Conditioning

Space Availability

  • Space
  • Size
  • Space Use
  • Condition
  • Available
  • 1st Fl-Ste 110
  • 4,776 SF
  • Office
  • Full Build-Out
  • Now

1st floor lobby identity. 11 private offices, conference room, kitchen, IT room, open space for cubicles.

  • 1st Fl-Ste 120
  • 3,764 SF
  • Office
  • Full Build-Out
  • Now

1st floor lobby identity. Reception with 3 conference rooms, 1 private office, kitchen, IT room and open space for cubicles.

  • 2nd Fl-Ste 210
  • 5,534 SF
  • Office
  • Full Build-Out
  • Now

7-8 private offices, 1-2 conference rooms, kitchen, wetbar and open space with 30 cubicles in place.

  • 2nd Fl-Ste 240
  • 902 SF
  • Office
  • Full Build-Out
  • Now

3 private offices and open space for cubicles.

  • 3rd Fl-Ste 300
  • 2,818 SF
  • Office
  • -
  • 30 Days

Open and private office mix.

  • 3rd Fl-Ste 320
  • 7,245 SF
  • Office
  • Full Build-Out
  • Now

10 large private offices, Large & medium sized conference rooms, workroom, kitchen, large reception area and open space for cubicles.

  • 3rd Fl-Ste 330
  • 2,043 SF
  • Office
  • Full Build-Out
  • Now

5 private offices, IT room, open space for cubicles.

  • 4th Fl-Ste 400
  • 11,227 SF
  • Office
  • Full Build-Out
  • Now

25-28 private offices, 3 conference rooms, multiple kitchenettes, open space for work stations.

  • 4th Fl-Ste 430
  • 1,286 SF
  • Office
  • Full Build-Out
  • 30 Days
Space Size Space Use Condition Available
1st Fl-Ste 110 4,776 SF Office Full Build-Out Now
1st Fl-Ste 120 3,764 SF Office Full Build-Out Now
2nd Fl-Ste 210 5,534 SF Office Full Build-Out Now
2nd Fl-Ste 240 902 SF Office Full Build-Out Now
3rd Fl-Ste 300 2,818 SF Office - 30 Days
3rd Fl-Ste 320 7,245 SF Office Full Build-Out Now
3rd Fl-Ste 330 2,043 SF Office Full Build-Out Now
4th Fl-Ste 400 11,227 SF Office Full Build-Out Now
4th Fl-Ste 430 1,286 SF Office Full Build-Out 30 Days

1st Fl-Ste 110

Size
4,776 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

1st Fl-Ste 120

Size
3,764 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

2nd Fl-Ste 210

Size
5,534 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

2nd Fl-Ste 240

Size
902 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

3rd Fl-Ste 300

Size
2,818 SF
Space Use
Office
Condition
-
Available
30 Days

3rd Fl-Ste 320

Size
7,245 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

3rd Fl-Ste 330

Size
2,043 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

4th Fl-Ste 400

Size
11,227 SF
Space Use
Office
Condition
Full Build-Out
Available
Now

4th Fl-Ste 430

Size
1,286 SF
Space Use
Office
Condition
Full Build-Out
Available
30 Days

1st Fl-Ste 110

Size 4,776 SF
Space Use Office
Condition Full Build-Out
Available Now

1st floor lobby identity. 11 private offices, conference room, kitchen, IT room, open space for cubicles.

1st Fl-Ste 120

Size 3,764 SF
Space Use Office
Condition Full Build-Out
Available Now

1st floor lobby identity. Reception with 3 conference rooms, 1 private office, kitchen, IT room and open space for cubicles.

2nd Fl-Ste 210

Size 5,534 SF
Space Use Office
Condition Full Build-Out
Available Now

7-8 private offices, 1-2 conference rooms, kitchen, wetbar and open space with 30 cubicles in place.

2nd Fl-Ste 240

Size 902 SF
Space Use Office
Condition Full Build-Out
Available Now

3 private offices and open space for cubicles.

3rd Fl-Ste 300

Size 2,818 SF
Space Use Office
Condition -
Available 30 Days

Open and private office mix.

3rd Fl-Ste 320

Size 7,245 SF
Space Use Office
Condition Full Build-Out
Available Now

10 large private offices, Large & medium sized conference rooms, workroom, kitchen, large reception area and open space for cubicles.

3rd Fl-Ste 330

Size 2,043 SF
Space Use Office
Condition Full Build-Out
Available Now

5 private offices, IT room, open space for cubicles.

4th Fl-Ste 400

Size 11,227 SF
Space Use Office
Condition Full Build-Out
Available Now

25-28 private offices, 3 conference rooms, multiple kitchenettes, open space for work stations.

Walk Score®
Walker's Paradise (96)
Bike Score®
Very Bikeable (78)
What is a Walk Score®, Transit Score® & Bike Score®?
Walk Score® measures the walkability of any address.
Transit Score® measures access to public transit.
Bike Score® measures bikeability of a location.
What is a Walk Score®
, Transit Score® & Bike Score?
Walk Score® measures the walkability
of any address. Transit Score®
measures access to public transit. Bike Score®
measures bikeability of a location.®

Property Taxes

Property Taxes

Parcel Number
010-066-017
Land Assessment
$980,685
Improvements Assessment
$2,696,895
Total Assessment
$3,677,580
  • Listing ID: 39414888

  • Date on Market: 2/12/2026

  • Last Updated:

  • Address: 100 B St, Santa Rosa, CA 95401

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