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Dennis Mastrantonio
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Dennis Mastrantonio

Rating 4.7
Farmers Insurance Agent in Castro Valley, CA
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Contact Info


20821 Chester St
Ste A
Castro Valley, CA 94546

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Phone Numbers

(510) 537-2000(510) 537-2000
(510) 537-2140

Office Hours

Day of the WeekHours
Mon:8:00 AM - 5:00 PM
Tue:8:00 AM - 5:00 PM
Wed:8:00 AM - 5:00 PM
Thu:8:00 AM - 5:00 PM
Fri:8:00 AM - 5:00 PM
Evenings by appointment
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Farmers Insurance Agent in Castro Valley, CA

Dennis Anthony Mastrantonio
About Me

Rating 4.7

As your local Farmers® agent in Castro Valley, CA, I'm here to help you protect your assets and promote your financial health. At the agency, we are skilled in educating you about insurance so you can tailor coverage to meet your needs. 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.

Languages Spoken: English

Years of Experience

I have over 37 years of experience as a Farmers Insurance agent.


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

Neighborhoods Served

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



CA License #: 0531062

States Licensed In


Insurance Products Offered

Auto Insurance
Home Insurance
Life Insurance1
Business Insurance
*To check background information of this investment professional, visit FINRA BrokerCheck.

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. 

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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.

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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.

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  • 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: