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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
Contact me

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 Marys College, Moraga and Moreau Catholic High School, Hayward

Neighborhoods Served

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



CA License #: 0531062

Insurance Products Offered

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

Ask Me About:

There are so many variables to consider when choosing homeowners insurance. But Farmers Smart Plan Home® can simplify your decision with customizable packages! Call me today to learn more.

Subject to restrictions.

Castro Valley AutoHaus

I've supported this business for many years. Excellent service. They know everything you need to know about your Toyota and Honda.

Learn More

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.

Learn More

  • 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:

Recent Reviews for Dennis Mastrantonio

Rating 4.7
12 Customer Reviews
  • Rating 5.0
    I have worked with Ms. Jagdeep and Mr. Mehta. They are both extremely efficient and always return calls promptly. Both of them have gone beyond the requirements of their job to give service. They have proactively guided and advised me in unfamiliar areas. That is why I have moved other insurane policies to your agency. Give them both raises
  • Rating 5.0
    Professional and courteous service.
  • Rating 5.0
    Paul Mehta is a very efficient agent with excellent customer service skills, he was on the ball from the start -- and helped me get a great policy for my cars and renter's insurance. Great job!
  • Rating 4.0
    Sometimes I have difficulty understanding the staff member. My wife has more difficulty than I. The person has been helpful in getting new policies done.
  • Rating 5.0
    Dennis and Paul have been great to work with. They fully explained my policies and need for additional insurance.
  • Rating 5.0
    Jagdeep is very helpfull and prompt. Thank you.
  • Rating 5.0
    Everything was perfect, everyone here at this office was more then willing to help and guide me threw all my options, great knowing they are there to help, i look forward to my relationship here.
  • Rating 4.0
    He is always there, accessible.
  • Rating 5.0
    Great job!
  • Rating 5.0
    Dennis was very thorough in reviewing our insurance needs, offered relevant options and patiently answered all of our questions. He ran various options to arrive at the policy that best fit our needs and saved us money in comparison to our current situation.
  • Rating 5.0
    Person who answered my call was very knowledgeable and pleasant to talk toi, very helpful doing the transaction that was needed almost inmediatly, it's very comforting to know they take good care of their customers
  • Rating 4.0
    Good agent
Displaying 1 - 3 reviews of 12