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David Russell O'Brien

David Russell O'Brien
Real Estate Agent (Broker)
Greenbrae CA

Broker (CA: 01832087)

18 years experience

REALTOR® 1 Active Listings Serves Marin County, CA
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Contact Information

Brokerage
Compass
Office Address
300 Drakes Landing Rd Ste 120
Greenbrae, CA  94904
(Marin County)
Office Phone
415-755-1111
Office Fax
415-738-7103
Mobile
415-948-3197
Email
davi*@*********.com
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Service Areas

San Rafael: CA Santa Venetia: CA Sleepy Hollow: CA Lucas Valley-Marinwood: CA Greenbrae: CA Kentfield: CA Larkspur: CA Corte Madera: CA Muir Beach: CA Strawberry: CA Tamalpais-Homestead Valley: CA Mill Valley: CA Alto: CA Sausalito: CA Black Point-Green Point: CA Novato: CA Bloomfield: CA Petaluma: CA Valley Ford: CA Tomales: CA Glen Ellen: CA Ross: CA San Anselmo: CA Fairfax: CA Marin City: CA

About David O'Brien

Since obtaining his real estate license in 2008, David O’Brien has diligently established himself as a leading professional in the Marin County market. His team, Team O’Brien, consistently ranks within the top 2% to 3% of agents in the area. The extensive network he has cultivated over the years provides his clients with early access to critical information, enabling them to achieve their real estate objectives. David has been an active member of the Marin Top Agent Network since 2015 and joined the Marin Platinum Group in 2016.

David's journey into real estate was inspired by his own experience purchasing a condominium, where he recognized a gap in the market for agents skilled in customer service, project management, and negotiation. He approaches each transaction with respect, humility, and empathy, utilizing his expertise and connections to benefit his clients. His knowledge extends to septic systems and water well management, making him a reliable resource for clients interested in country properties.

David prioritizes understanding his clients' needs, crafting tailored solutions that help them realize their property aspirations or maximize the value of their homes. Committed to professional development, he has earned several industry credentials, including the Accredited Buyer’s Representative, Graduate Realtor® Institute, and Certified Residential Specialist designations. Since becoming a licensed broker in 2017, his background in real estate finance has further enhanced his ability to serve clients effectively.

A fundamental belief of David's is that hard work yields significant rewards. He witnesses this daily with first-time buyers, sellers preparing for retirement, and seasoned investors looking to expand their portfolios. David is dedicated to helping his clients navigate the property market, striving to create opportunities for financial stability.

A native of the Bay Area, David has resided in Marin since 2002. He enjoys family time with his wife and business partner, Deirdre, and their two children in San Rafael. An avid soccer player, David also dedicates time to volunteer at the county jail and detox center, viewing these humble acts of service as a means to foster hope within the community.

Marin County, CA Real Estate Market Analysis (Single Family Homes)

$2,679,784
Avg. Listing Price
From David's portfolio
3.6 / 3.0
Avg. Beds/Baths
Typical property size
2,548 sf
Avg. Square Footage
Interior living space
349
Active Listings
Current inventory

Marin County's real estate market stands as one of California's most exclusive and geographically diverse property landscapes, where million-dollar homes nestle against rolling hills and waterfront communities command premium prices. This affluent market north of San Francisco attracts buyers seeking luxury living with natural beauty, creating a unique ecosystem where properties routinely sell for well above state averages and inventory remains perpetually tight.

The county's 1,632 total actively licensed agents serve a sophisticated clientele across dramatically different terrain, from Tiburon's waterfront estates to Mill Valley's wooded enclaves. What makes this market particularly interesting is how these 1,632 agents with email connectivity have adapted to serve both tech executives seeking modern amenities and families prioritizing top-rated schools, all while navigating some of California's most complex zoning regulations and environmental constraints.

Major Marin County, California Real Estate Markets

San Rafael anchors the county as its largest city and commercial hub, offering relatively more affordable options while still maintaining Marin's signature quality of life. The city's diverse neighborhoods range from charming Craftsman homes in the Gerstle Park area to newer developments near the civic center, making it a focal point for first-time Marin buyers and those seeking urban conveniences without San Francisco price tags.

Mill Valley and Sausalito represent the county's premium waterfront and hillside markets, where properties regularly exceed $2 million and buyers compete for homes with Golden Gate Bridge views or redwood grove settings. Meanwhile, Novato in the north provides the county's most family-oriented market, featuring newer construction and larger lots that appeal to buyers prioritizing space and value within Marin's prestigious school districts.

Market Dynamics and Geographic Complexity

Marin County's real estate dynamics are heavily influenced by its geographic constraints, with hillsides, wetlands, and open space preserves limiting developable land and maintaining artificial scarcity. This creates micro-markets where a property's elevation, view corridor, or proximity to hiking trails can dramatically impact values, requiring agents to possess intimate knowledge of neighborhood-specific factors that don't exist in more uniform markets.

The market also experiences unique seasonal patterns driven by both school calendars and weather, as many buyers time purchases around the acclaimed Marin school system while sellers capitalize on the county's stunning spring and summer landscapes. Fire risk in hillside areas and flood considerations in low-lying regions add additional complexity layers that sophisticated buyers expect their agents to navigate expertly.

Why Businesses Need Marin County, California Agent Contact Data

Companies serving the luxury home market find Marin County agents invaluable for reaching high-net-worth clients who invest heavily in premium home services, from custom landscaping to smart home technology. These agents regularly work with clients whose home improvement budgets exceed most people's annual salaries, making them crucial referral sources for businesses offering high-end residential services.

The county's agent network also provides unique access to environmentally conscious consumers who prioritize sustainable building materials, solar installations, and eco-friendly home solutions. Given Marin residents' strong environmental values and substantial disposable income, businesses offering green products or services find these agent relationships particularly profitable for generating qualified leads and premium project opportunities.

Current Property Listings

As of 2/15/2026, David O'Brien has 1 property for sale in Greenbrae and surrounding areas.

$299,000

Listed 2026-01-15

119 Marin Valley Dr
Novato, CA  94949

Beds: 2.0
Baths: 2.0
Sq Ft: 955
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Current Property Rentals

David O'Brien currently has no rental properties available in Greenbrae and surrounding areas. Check back later.