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Dennis Mastrantonio
4.8 out of 5
Rating 4.8
(15 Reviews)
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Farmers Insurance Agent in Castro Valley, CA

Dennis Mastrantonio

4.8 out of 5
Rating 4.8
(15 Reviews)
8:00 AM - 5:00 PM 8:00 AM - 5:00 PM 8:00 AM - 5:00 PM 8:00 AM - 5:00 PM 8:00 AM - 5:00 PMClosed Today Closed Today

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Contact info
Location info
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20821 Chester St
Ste A
Castro Valley, CA 94546
Office hours
Day of the WeekHours
Monday8:00 AM - 5:00 PM
Tuesday8:00 AM - 5:00 PM
Wednesday8:00 AM - 5:00 PM
Thursday8:00 AM - 5:00 PM
Friday8:00 AM - 5:00 PM
Evenings by appointment

About Dennis Mastrantonio

As your local Farmers® agent in Castro Valley, CA, I'm here to help you protect your assets and feel confident about your insurance. At the agency, we do the heavy lifting and take the worry out of managing your protection. This process is straightforward and personalized to help make you smarter about insurance. Whether, auto, home, business or life¹ we have the knowledge and experience to help you better understand your coverage options. Please stop by our friendly office.

PWS 96722N 12/16

Give me a call at (510) 537-2000 and I'll be happy to answer any questions you might have.


Years of experience

I have over 37 years of experience as a Farmers Insurance agent.
Languages spoken: English


CA License #: 0531062


St Mary's College, Moraga CA and Moreau Catholic High School, Hayward CA

Neighborhoods Served

Hayward, San Leandro, Livermore, Union City, and Dublin

States licensed in


Insurance products offered

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Auto Insurance
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Home Insurance
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Life Insurance1
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Call for more info

1. To check the background information of this firm or an investment professional. visit FINRA BrokerCheck
2. For a free tool to research our financial professionals. visit
3. To view the FFS Customer Relationship Summary select: Form CRS.
4. To view additional disclosures related to FFS products select: Disclosures

Ask me about

Insurance claims for water damage are 7 times more frequent than claims related to theft or fire.* Drips and leaks can go unnoticed, causing mold and costly damage over time.  Call me today to discuss ways you can help protect your home. You may also earn a discount on your Farmers® homeowner’s insurance policy. 

Ghazni Afghan Kabobs

After leaving my office I recommend trying out Ghazni's Kabob for a great meal and great value. My friend Tawab and Tee will take good care of you!
Here is their story....
At our first location on A street, the owner lived near the restaurant for years, watching as they served Indian food and dreaming of the possibility of opening an Afghan restaurant in the neighborhood. In 2014, the Indian Restaurant moved and Ghazni Afghan Kabobs was born. Our delicious food is the product of a lifelong dream of sharing our family recipes from Afghanistan with people who want to try new cuisines. Our Winton location opened its doors in May of 2019 and we are committed to keep going forward with our mission of serving high quality food, friendly service and a clean atmosphere for our guests and community.

Moreau Catholic High School, Hayward

It's been my privilege and honor to volunteer at my almamtre for over twenty years. I'm currently active as a member of the Board of Trustees.

  • Playing my Guitar
  • Playing with my grand children
  • Cooking
  • Watching some Football

New baby? Getting married? Life Insurance can help you provide a financial safety net. Let’s discuss your life changes.

PWS LD-01 10/17

Farmers agents are small business owners like you. We know from experience the unexpected happens.
Give me a call to learn more about our coverage and get a quote today!

Frequently asked questions