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William N Bullock

William N Bullock
Real Estate Agent (Broker)
Mill Valley CA

Broker (CA: 00837358)

34 years experience

REALTOR® 5 Active Listings Serves Marin County, CA
View on Realtor.com

Contact Information

Brokerage
Golden Gate Sotheby's International Realty

Office Website
Office Address
100 Tiburon Blvd Ste 100
Mill Valley, CA  94941
(Marin County)
Office Phone
415-381-7300
Office Fax
415-383-1258
Mobile
415-381-7300
Email
b.bu*****@*****.com
Show Email for $5

Service Areas

San Rafael: CA Santa Venetia: CA Sleepy Hollow: CA Lucas Valley-Marinwood: CA Greenbrae: CA Kentfield: CA Larkspur: CA Tiburon: CA Belvedere Tiburon: CA Strawberry: CA Belvedere: CA Corte Madera: CA Fairfax: CA Woodacre: CA Forest Knolls: CA Lagunitas-Forest Knolls: CA Muir Beach: CA Tamalpais-Homestead Valley: CA Mill Valley: CA Alto: CA Sausalito: CA Black Point-Green Point: CA Novato: CA Inverness: CA Point Reyes Station: CA Ross: CA San Anselmo: CA Marin City: CA Stinson Beach: CA San Geronimo: CA

About William Bullock

With nearly $2 billion in closed transactions, Bill and Lydia are prominent figures in the Marin real estate market, showcasing an extensive portfolio of luxury homes in areas such as Belvedere, Kentfield, Ross, and Tiburon. Over their eighteen-year collaboration, they have earned a reputation for facilitating the sale of exceptional properties, each becoming a cherished home filled with lasting memories for their new owners.

In 2015, they achieved a remarkable milestone by surpassing the previous record for the number of Marin County homes sold for over $10 million in a single year. Their extensive global network of distinguished buyers and sellers, along with access to exclusive off-market listings, has further established their standing as leaders in the industry. Bill and Lydia are recognized for their unwavering commitment to professionalism, confidentiality, and the unique needs of their clients.

Renowned for their integrity and reliability, they provide personalized guidance and leverage their specialized expertise in the luxury market to facilitate successful transactions. Their exceptional service, combined with innovative and sophisticated marketing strategies, underscores their continued success in the real estate arena.

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

$2,679,784
Avg. Listing Price
From William'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 2/17/2026, William Bullock has 5 properties for sale in Mill Valley and surrounding areas.

$580,000

Listed 2026-02-04

852 Diablo Ave Apt 304
Novato, CA  94947

Beds: 2.0
Baths: 2.0
Sq Ft: 1,268
Lot: 1,359 sf
Condos Map
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$3,995,000

Listed 2025-02-19

3800 Paradise Dr
Tiburon, CA  94920

Beds:
Baths:
Sq Ft:
Lot: 323,215 sf
Land Map
View Full Details

$8,750,000

Listed 2026-01-30

2800 Paradise Dr
Tiburon, CA  94920

Beds:
Baths:
Sq Ft:
Lot: 632,731 sf
Land Map
View Full Details

$7,495,000

Listed 2025-07-25

117 Telegraph Hill Blvd
San Francisco, CA  94133

Beds: 4.0
Baths: 4.5
Sq Ft: 4,190
Condos Map
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$28,000,000

Listed 2026-01-21

201 Bridgeway
Sausalito, CA  94965

Beds: 8.0
Baths: 6.5
Sq Ft: 8,770
Lot: 19,798 sf
Single Family Map
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Current Property Rentals

William Bullock currently has no rental properties available in Mill Valley and surrounding areas. Check back later.