```
Sandy Onken Fiek

Sandy Onken Fiek
Real Estate Agent (Salesperson)
Mill Valley - CA

Salesperson (CA: 01365123)

24 years experience

REALTOR® 1 Active Listings Serves Marin County, CA
View on Realtor.com

About Sandy Onken Fiek

Sandy is a seasoned real estate professional who has successfully facilitated the sale of 150 homes, demonstrating her extensive market knowledge and unwavering dedication. Her calm demeanor and sensible approach provide clients with reassurance throughout the buying and selling process.

With a proven track record in diverse market conditions, Sandy has effectively represented clients in the sale of single-family homes, multi-unit properties, and condominiums throughout the Bay Area. Sellers rely on her expertise to handle every facet of the transaction, from pre-market preparations and contractor management to staging, marketing, evaluating offers, and negotiating optimal deals. Buyers appreciate her relentless advocacy, often describing her as the proactive agent who ensures they secure their desired properties.

Sandy's passion for real estate is deeply rooted in her upbringing. Growing up in Newport Beach, California, she observed her mother excel as a top residential producer for over 25 years, while her father practiced as a commercial real estate attorney. This early exposure instilled in her a strong work ethic and a commitment to excellence in her own career.

In addition to her real estate practice, Sandy holds a leadership position as Committee Chair within the San Francisco Association of Realtors®, where she collaborates with industry leaders to influence the organization’s direction. Her commitment to professional development is evident in her participation in weekly and monthly real estate courses. She is also a certified Pricing Strategy Advisor and a Real Estate Negotiation Expert.

Sandy earned her undergraduate degree from UC Berkeley and her MBA with honors from the University of San Francisco. As a long-time homeowner and property investor, she understands the intricacies of family life and the challenges of navigating school choices in the Bay Area, where she resides with her husband and teenage children.

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

$2,627,700
Avg. Listing Price
From Sandy's portfolio
3.7 / 3.0
Avg. Beds/Baths
Typical property size
2,515 sf
Avg. Square Footage
Interior living space
283
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.

Contact Information

Brokerage
Compass
Office Address
250 E Blithedale Ave Ste D
Mill Valley, CA  94941
(Marin County)
Office Phone
415-380-6100
Office Fax
Mobile
415-902-5991
Email
sandraonken@************

Service Areas

San Francisco: CA Muir Beach: CA Strawberry: CA Tamalpais-Homestead Valley: CA Larkspur: CA Mill Valley: CA Alto: CA Sausalito: CA

Current Property Listings

As of 1/31/2026, Sandy Onken Fiek has 1 property for sale in Mill Valley and surrounding areas.

$709,000

Listed 2026-01-27

3235 Gough St Apt 301
San Francisco, CA  94123

Beds: 1.0
Baths: 1.0
Sq Ft:
Lot: 6,874 sf
Single Family Map
View Full Details

Current Property Rentals

Sandy Onken Fiek currently has no rental properties available in Mill Valley and surrounding areas. Check back later.