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Hello…  I am Joanne L. Gardiner,  a real estate broker in the beautiful San Francisco Bay area. Known for its moderate climate and bridges crisscrossing the bay, it’s a wonderful place to call home.

I specialize in residential real estate: houses, condos, manufactured homes, and residential income property.

Do you have a question about real estate or manufactured homes?  Tell me what’s on your mind by sending me a note on our contact form or call me on my cell phone.

For more than 40 years I have delivered results buyers and sellers love.  I strive to exceed my client’s expectations.  It would be my honor to do the same for you whether you’re buying or selling in the San Francisco Bay Area.   You may find it interesting what other clients have to say about my service, click here

I am looking forward to hearing from you and to assisting you with your real estate needs.


JLG headshotJoanne L. Gardiner, Broker, e-PRO Realtor®, Notary Public
CalBRE 00822285 and DOH SP117851

Cell phone: 510-589-4794

Grand Master for 2015 Bay East Achievement Club
Grand Master for 2014 Bay East Achievement Club
Grand Master for 2013 Bay East Achievement Club

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Why call Joanne?

  • Listens to her clients

  • Strives to exceed their expectations

  • Produces results buyers and sellers love

  • More than 40 years experience

  • Top producer, even in the toughest years


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Serving San Francisco Bay Area Buyers and Sellers for more than 40 years.

Bureau* of Real Estate Brokers License Number: 00822285
Department of Housing and Community Development Occupational License Number:  SP1178511

Advantage Realty

3205 Whipple Road – Union City, CA 94587

Office: 510-429-4800 or Cell Phone: 510-589-4794   

We serve the greater bay area: Joanne L. Gardiner and Advantage Realty serve most communities in the  East Bay and portions of the Peninsula.  Our location near the bay, San Mateo Bridge, and Interstate 880 enables us to easily serve most of Alameda Country, parts of Contra Costa County, and parts of San Mateo County. Our primary service areas in Alameda County include:  Hayward, Union City, Fremont, Castro Valley, San Leandro, San Lorenzo, Dublin, Livermore, Newark, Niles, Oakland, Pleasanton,  and Sunol.  In Contra Costa County we serve:  Danville and San Ramon.  In San Mateo County we serve:  Belmont, Burlingame, Foster City, Palo Alto, San Carlos and San Mateo.  

The types of real estate in which we specialize are:  Single family homes, duets, condominiums, townhomes, garden homes, PUDs, manufactured homes, mobile homes, and  residential income properties.

The primary zip codes for the areas we serve are:  94540, 94544, 94545, 94541, 94542, 94543, 94540, 94557, 94587, 94536, 94537, 94538, 94539, 94555, 94560, 94577, 94578, 94579, 94546, 94552, 94583, 94582, 94566, 94588, 94506, 94526, 94568, 94611, 94610, 94602, 94618, 94619, 94605, 94501, 94502, 94404, 94002, 94010, 94301, 94302, 94303, 94304, 94306, 94309

Proud to be a Realtor

ARM Homes - Dream Homes - Meticuously remodeled manufactured homes by master craftsmenOur sister company ARM Homes specializes in manufactured homes: New customized manufactured homes and meticulously rebuilt manufactured homes by master craftsmen.  ARM Homes also purchases select manufactured homes for all cash in as-in condition.  Please visit their web site for more information:


* California Bureau of Real Estate (CalBRE) is the same as the Department of Real Estate.  The name was changed July 1, 2013.