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851 Irwin St 29,923 SF 100% Leased Office Building San Rafael, CA 94901 $8,165,000 ($272.87/SF) 6.63% Cap Rate

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INVESTMENT HIGHLIGHTS

  • 851 Irwin Street – 29,923-square-foot, three-story office building at full occupancy across 39 units and an excellent 1031 exchange candidate.
  • Recent Capital Improvements – Building has undergone upgrades under current ownership, reducing near-term CapEx and providing operational stability.
  • Strong Parking Ratio & Visibility – 59 on-site parking spaces (covered and surface) plus high visibility with traffic counts of over 151,000 VPD.
  • Stabilized Downtown Asset – Diversified tenancy of professional offices, creative firms, and community orgs with room for escalations upon renewals.
  • Prime Marin County Location – Situated in the heart of San Rafael with excellent access to Highway 101, public transit, and walkable amenities.
  • Upside in Rent Growth – Market rents are trending upward in Marin County, with tenant demand largely leaning toward this building's suite sizes.

EXECUTIVE SUMMARY

The Kilpatrick Team of NAI NorCal presents this fully upgraded, 100% leased acquisition opportunity for 851 Irwin Street, a 29,923-square-foot, three-story office building in Downtown San Rafael.

851 Irwin Street has been leased to a solid mix of tenants since its 20% occupancy rate at the outset of 2024, offering a stabilized, cash-flowing asset ready for a turnkey takeover. The strong lease-up strategy has led to a scheduled NOI of $525,611 and leaves ample potential for value-add initiatives. The average monthly rate of leases here is $2.54 per square foot, compared to the San Rafael office submarket average of around $3.37 per square foot. 851 Irwin Street’s diverse roster of thriving tenants will likely be receptive to rental due to the current discounted rents, and the building’s estimated income could increase nearly 60% upon reaching market rates.

A flexible layout and recent capital improvements give 851 Irwin Street sturdy fundamentals for long-term appreciation, minimal capital expenditure costs, and strong future leasing potential. The building’s floor plan comprises small- and mid-sized offices, an optimal range for the San Rafael submarket, where the average office lease size since 2023 is approximately 1,365 square feet. After purchasing the building, the ownership group has made significant refurbishments along with its superb leasing strategy. Infrastructure upgrades include HVAC modernization, elevator improvements, roof restoration, and comprehensive security/safety enhancements. Aesthetic revisions were also made to freshen up the interior flooring, lighting, and common areas, plus a communal kitchen and conference room were added.

Direct Highway 101 exposure and access in the heart of San Rafael are some of the greatest advantages of 851 Irwin Street, attractive facets that are amplified by its rare abundance of on-site parking at 59 spaces. This is an excellent address for any office user with lifestyle-elevating amenities right at the doorstep. The building is within three blocks of essentials like Starbucks, Whole Foods, Trader Joe’s, Petco, and over a dozen restaurants, plus the San Rafael SMART rail station.

Marin County paints an optimistic outlook as its real estate indicators turn positive after the industry-wide pandemic slump, building upon its unrivaled foundation as one of the wealthiest counties nationwide and its proximity to San Francisco. Due to the density of high-income households, the Marin County real estate market comprises mostly residential assets, with commercial inventory and new development sites limited by municipality regulations, underpinning the exclusivity of 851 Irwin Street. This has put upward pressure on office rents, and the county saw a 1.4% growth rate in 2024 after remaining flat the previous two years. Additionally, much of the county’s leasing activity is concentrated along Highway 101, particularly near transit hubs, outlining 851 Irwin Street as a marquee model for success.

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SALE FLYER

MORE ATTACHMENTS

851 Irwin Flyer_

PROPERTY FACTS

Sale Type
Investment
Property Type
Office
Building Size
29,923 SF
Building Class
B
Year Built
1982
Price
$8,165,000
Price Per SF
$272.87
Cap Rate
6.63%
NOI
$541,013
Percent Leased
100%
Tenancy
Multiple
Building Height
3 Stories
Typical Floor Size
9,974 SF
Building FAR
1.04
Lot Size
0.66 AC
Zoning
T5N 50/70
Parking
59 Spaces (2.91 Spaces per 1,000 SF Leased)
Walk Score®
Walker's Paradise (95)
Bike Score®
Very Bikeable (81)
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.®

DEMOGRAPHICS

Demographics

1 Mile 1 Mi. 3 Miles 3 Mi. 5 Miles 5 Mi.
1 Mile
3 Mile
5 Mile
2020 Population
21,130
87,102
144,579
2024 Population
20,466
84,726
140,770
Population Growth '20-'24
-3.1%
-2.7%
-2.6%
2020 Households
8,059
33,987
57,074
2024 Households
7,874
33,272
55,764
Household Growth '20-'24
-2.3%
-2.1%
-2.3%
Average Age
40
44
45
Median Household Income
$86,283
$112,220
$123,364
Daytime Employees
17,186
61,835
84,328
Total Businesses
2,774
9,445
13,154
College Degree + Higher
44%
54%
59%

NEARBY AMENITIES

RESTAURANTS

Taqueria San Jose Mexican $ 3 min walk
Little Mandarin Chinese $ 2 min walk
Whistlestop Cafe $ 3 min walk
Starbucks Cafe $ 3 min walk
Mauna Loa Hawaiian BBQ Barbecue $ 5 min walk
House Of Bagels Bagels $ 4 min walk
Best Burgers Fast Food $ 6 min walk
Chipotle - - 6 min walk
Fenix Seafood $$$ 8 min walk
Pete's 881 Club American $$ 9 min walk

RETAIL

FedEx Office Business/Copy/Postal Services 3 min walk
Walgreens Drug Store 6 min walk
F45 Training, Inc. Fitness 6 min walk
Trader Joe's Supermarket 6 min walk
Petco Animal Care/Groom 6 min walk
Supercuts Salon/Barber/Spa 6 min walk
Whole Foods Supermarket 6 min walk
Staples Office Supply 8 min walk
Sprouts Farmers Market Supermarket 8 min walk
Best Buy Consumer Electronics 10 min walk

HOTELS

AC Hotels by Marriott
140 rooms
3 min drive
Four Points by Sheraton
235 rooms
6 min drive
Courtyard
146 rooms
7 min drive
Embassy Suites by Hilton
236 rooms
8 min drive
Ascend Collection
69 rooms
12 min drive

PROPERTY TAXES

PROPERTY TAXES

Parcel Number
014-125-15
Land Assessment
$728,280
Improvements Assessment
$2,705,040
Total Assessment
$3,433,320

SALE ADVISORS

SALE ADVISORS

James Kilpatrick, President, Chief Operating Officer
James Kilpatrick is the President of NAI Northern California. His career began in 1998 with a major national firm specializing in investment property brokerage where he received numerous achievement awards. He has been involved in investment transactions exceeding $1 Billion across most product categories and oversees the day to day operations, strategic expansion of the firm and large account management.

Mr. Kilpatrick is a San Francisco Bay Area native with ownership, management, syndication and debt structuring experience across most product types. He has had various positions from board of directors appointments to President of various real estate organizations. He has also been a regular contributing writer for newsletters and trade journals of organizations such as the Berkeley Property Owners Association (BPOA) and RHA (Rental Housing Association of northern Alameda county). He is a member of the Rental Housing Owners Group (RHO), the Investment Marketing Forum (IMF) and Investment Property Marketing Group (IPMG). In addition to the above, Mr. Kilpatrick has experience in distressed asset sales, expert witness work, portfolio valuations, condominium and subdivision work, bankruptcy and trustee’s sales, sale leasebacks and other more complicated transactions.
Seth Hubbert, Investment Advisor
Seth is an Investment Advisor at NAI Northern California, specializing in transacting multifamily assets in the Bay Area. Seth has a strong leadership, analytical, and service background, providing the highest-level value to clients.

Seth has grown and led several successful businesses, including Five Iron Financial, a real estate investment firm renovating distressed property and operating housing in high-growth regions in the United States. He also previously served as the CEO of Tech Exchange, providing 45,000 computers to students and families during the height of the pandemic.

Holding degrees in Physics and Education, Seth masterfully blends quantitative analysis with client guidance and support. When not immersed in real estate, you’ll find Seth coaching youth sports, serving on community boards, and volunteering at his children’s school.
Damon Gerstein, Investment Advisor
Damon Gerstein specializes in office, multifamily, and industrial real estate across the Bay Area. Born and raised in Marin County, CA, Damon has spent his life immersed in the region’s unique communities and dynamic market. His local knowledge, combined with his academic background, provides clients with both insight and strategy in navigating complex transactions. Damon earned his Bachelor of Science in Urban and Regional Development with a minor in Real Estate Development from the University of Arizona. This foundation equips him with a deep understanding of market analysis, urban planning, and investment strategy—tools he leverages to deliver value to his clients. At NAI NorCal, Damon is committed to learning from industry leaders while actively contributing to the team’s success. Outside of real estate, he is passionate about traveling and sports, enjoying everything from working out and snowboarding to hiking and exploring the outdoors.
  • Listing ID: 37339421

  • Date on Market: 8/19/2025

  • Last Updated:

  • Address: 851 Irwin St, San Rafael, CA 94901

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