Sonoma About Us

Corporate & Office History

* The CENTURY 21 system was founded in 1971 in Southern California. The founding principle was simple: to enable small independent brokers to operate under a common identity, sharing in the resources of collective advertising, training and marketing. This concept enabled brokers to remain responsive to the needs of their local marketplace while favorably positioning themselves against the competition. And it worked!

* The CENTURY 21 network grew rapidly in the ’70s and ’80s, quickly becoming the largest real estate sales organization in the world. Sales topped the $70 billion mark. Independent polls now show the CENTURY 21 name to be the best recognized name in real estate

* Catherine Sevenau and Linda De Martini purchased a Century 21 franchise and became CENTURY 21 Wine Country in 1996. Working together in the real estate business since the early 1980s. They’ve successfully navigated through three major market swings, remaining today as the longest established locally owned and operated company in Sonoma Valley.

* Through its 2008 partnership with CENTURY 21 NorthBay Alliance, CENTURY 21 Wine Country became part of the largest Sonoma County owned real estate company north of the Golden Gate. C21 NorthBay Alliance has nine offices in Sonoma, Marin and Lake Counties and over 200 talented sales associates to serve your real estate needs.

* CENTURY 21 is the most recognized name in Real Estate with over 8000 offices located in 80 countries across the globe. Easter Seals is at the heart of the company’s charitable work having raised nearly $102 million in support, helping thousands of children and adults with disabilities live with greater independence.

* CENTURY 21 Corporate advertised in the 2012 and 2013 Super Bowl games, the company featured on prime time TV with upbeat, bold, positive commercials putting Century 21 agents front and center. We are “Smarter, Bolder and Faster”!

* CENTURY 21 Corporate prime time advertised not only the Super Bowl, but also in the Summer Olympics


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CalBRE # 01523620
At Century 21 NorthBay Alliance, we service all types of real estate in Santa Rosa, Sonoma County, Sebastopol, Oakmont, Petaluma, Rohnert Park, Cotati, Sonoma, Lake County, Petaluma, Guerneville, Healdsburg, Cloverdale, Forestville and the entire Sonoma Valley Wine Country. Our Realtors and Real Estate Agents, live and work in Sonoma County which is located in the North Bay Area of California. The type of real estate offered ranges from single family homes, condos, and townhouses, to vineyards, land, ranches, lots, units, commercial property and more. If you are thinking about relocating to our area, contact our relocation department and we can help you sell your current home and find a home in the beautiful wine country.

Century 21 Real Estate LLC supports the principles of the Fair Housing Act and the Equal Opportunity Act. Each Office is Independently Owned and Operated. CENTURY 21® and the CENTURY 21 logo are registered marks licensed to Century 21 Real Estate LLC. All other trademarks and service marks are the property of their respective owners. Neither Century 21 Real Estate LLC nor any of their respective franchisee's affiliated companies provides any product or service described herein. Not all products and services are available in all states. All products and services are provided by the applicable service provider described herein.

Equal Housing Opportunity Equal Housing Opportunity.

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