Home Office, San Ramon, CA
San Ramon, CA
Since 1887, Mason-McDuffie Mortgage has operated under one idea: Your Financial Security Begins at Home. An employee owned company, Mason Mac works with one mission – to make the dream of home ownership a reality for our clients. We help to... Show More
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Charles Sterni
Charles is a phenomenal man and great at his career! He explains everything very thoroughly and is always open to more questions. You can contact him anytime. If he doesn't answer right away he always calls back very quickly, ready to answer...
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Don Bartolomucci
Don is a real pro always responds and provides great information
Reply from Don Bartolomucci
May 18th, 2026 03:00 PM
Daniel, I appreciate your kind words. I am so happy for You and Lisa. You guys are in the most Perfect Home. I wish You and Lisa many happy memories in your new Home on the Water! Congratulations!
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Don Bartolomucci
Don was amazing to work with and helped solve problems as they came up on this deal. He helped over come several obstacles with the client.
I will definitely call Don on another deal soon!
Reply from Don Bartolomucci
May 18th, 2026 01:53 PM
Mike and I appreciate you for all Your Assistance! We couldn't have got to the finish line without you and your help!
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Charles Sterni
Charles and his staff were incredible in their work experience, communication and professionalism. Thanks a bunch!
for
Charles Sterni
Extremely quick to communicate and answer any questions we had. Charles was super friendly along with the underwriters.
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Charles Sterni
Charles has been one of the most amazing lenders I have had the pleasure to work with, and I highly recommend him for all your lending needs!!
Katerina went above and beyond to get our loan processed quickly. She explained all of our financing options and answered all of our questions. She was kind, professional and proficient. and just a pleasure to work with. We have already recommended...
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Reply from Katerina Stephens
May 8th, 2026 06:31 PM
Tracy, I'm so glad to hear that you had a positive experience with me! It was a pleasure working with you, and I appreciate your kind words. Thank you for recommending me to your friends; it truly means a lot!
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Don Bartolomucci
Don was a rock star to work with. Any future home purchases requiring financing will go through Don, hands down.
Reply from Don Bartolomucci
May 4th, 2026 09:22 PM
Sarah, I appreciate your kind words and confidence in my work. I'm happy to know that you had such a positive experience. Thank you for choosing me and my team.
Katerina went above and beyond to ensure my husband and I were informed and comfortable throughout our first home purchase. I cannot think of a single area of improvement for Katerina or how our experience could have been better. We are so...
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Reply from Katerina Stephens
May 8th, 2026 06:33 PM
Jacqueline, I'm truly grateful for your kind words and trust in me during such an important milestone. It's appreciated to know that you and Jon felt informed and comfortable throughout your home purchase. I look forward to assisting you with...
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Don Bartolomucci
Don's focus and attention to detail!
Reply from Don Bartolomucci
May 4th, 2026 03:54 PM
It takes the focus and detail of the entire team! I am am so proud to be part of Your Team!
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About
Since 1887, Mason-McDuffie Mortgage has operated under one idea: Your Financial Security Begins at Home. An employee owned company, Mason Mac works with one mission – to make the dream of home ownership a reality for our clients. We help to fulfill that dream every day from coast to coast.
Over the years, we’ve made some changes to keep up with the times. Today, we work with the latest in technology to provide an efficient loan process for our clients. We utilize the latest in encryption and security services to maintain our client’s privacy and security, without sacrificing the convenience of a digital loan process.
One thing that hasn’t changed is our focus on people and relationships.
Products & Services
Mortgage Loan Officer
FHA Home Loan
VA Home Loan
Jumbo Home Loan
Mortgage Refinance
Year Started
1887
Time Zone
Pacific Standard Time (PST)
Disclaimer
To protect your personal information from unauthorized access and use, we use security measures that comply with federal law. These measures include computer safeguards and secured files and buildings.