Showroom: 1079 Boulevard Way
Walnut Creek CA 94595
Hours: M-F: 10-5:30 & Sat: 10-4

Our Team

Jim Vivrette

California General Contractor, License No. 577881
CKD, Certified Kitchen Designer
CBD, Certified Bath Designer
CID, Certified Interior Designer
Past President, Diablo Valley Chapter,
NARI (National Association of the Remodeling Industry)
Instructor, Adult Education Programs & Seminars

With more than 30 years of experience in all phases of residential remodeling, Jim Vivrette has a passion for kitchen and bath design. After receiving a bachelor’s degree in Economics from the University of California at Berkeley and completing the coursework for a master’s program at California State, East Bay, Jim gained several years of management experience in the public and private sectors. However, he always dreamed of starting his own business.

In 1986, Jim created Altera Design & Remodeling. Known for his vision and creativity, he has transformed thousands of homes to match the dreams of his clients. Jim loves facing new challenges and prides himself on his ability to overcome design obstacles that have stymied other firms. He has assembled a team of friendly, sincere, intelligent and creative designers and remodelers who provide impeccable service in all aspects of the job. An award-winning designer, Jim continues to focus his attention on great customer service, tremendous quality and timely scheduling. He attends numerous educational classes each year to ensure that he and the Altera Design & Remodeling team are always on the leading edge of the kitchen and bath industry.

Yuko Matsumoto

CKD, Certified Kitchen Designer
CBD, Certified Bath Designer

Yuko Matsumoto has designed beautiful kitchen and bath remodel projects for Altera Design & Remodeling for more than seven years, including some of our most complex projects. After receiving a bachelor’s degree in English literature from Tsuda College in Japan, Yuko completed an Interior Design Certification program and continues to take classes to stay at the forefront of the industry. She previously served as a kitchenware buyer for Williams-Sonoma in Japan, and Kitchenelia, a high-end kitchen goods store in Japan. Fluent in Japanese, Yuko brings a unique blend of talent, design and cultural perspective to Altera Design.

Amanda VanNortwick


Amanda is a creative and artistic Kitchen Designer with over 10 years residential design experience.

She is a detail oriented industry professional with an eye for design and a passion for creativity. Her attention to detail serves her well in an ever changing market where details dictate success. She is highly versed in 20-20 Design Software as well as AutoCAD and is at- her- best when communicating with her clients, interpreting floor plans, strategizing over field measures and designing with the nation’s finest cabinet manufacturers.

When designing, Amanda is a visionary who has a strong ability to produce aesthetically pleasing, innovative, functional designs. In 2001 she earned a Bachelor of Arts Degree (B.A.) in Interior Design from California State University, Fresno, CA. Her enthusiasm, determination and extensive design experience aid in her success as a kitchen designer.

Amanda’s interests include The American Society of Interior Designers (ASID), College Art Association (CAA), and the National Kitchen & Bath Association (NKBA). Her leisure activities including traveling all over the world and competing on the tennis courts for the local US Tennis Association (USTA).

Jennifer Rocha

Operations Manager

As the Operations Manager, Jennifer’s role is critical to the success of the company. Functioning as Altera Design’s estimator, customer relationship manager and IT lead, Jennifer works very closely with Jim to help run the company’s current operations as well as plan for and execute against its future goals. Her strong background, which includes experience as a kitchen designer, outside salesperson and design assistant for both large companies and small businesses in the remodeling industry, makes her expertly suited for her position and to provide clients with a great remodeling experience. Outside of the office, Jennifer enjoys photography and crafts, especially as it relates to her young daughter.

Sylvia Vivrette

Accounting Manager

Sylvia has been the office manager since the inception of Altera Design and Remodeling in 1986. She has provided more than 25 years of administrative support including human resources, accounts payables and receivables, payroll, and all administrative aspects of both the remodeling company and the showroom. Sylvia prides herself in maintaining the professional yet family-oriented culture at Altera Design, providing staff with an arena for open communication and interaction . Off hours, she enjoys travel, music, biking, attending A’s baseball games, college football games, and particularly loves spending time with her family and friends.


Project Managers

Our in-house team of project managers collectively represent over 100 years of building experience. As the ones responsible for overseeing the implementation of the design, they are all highly trained and highly experienced craftsmen with a meticulous eye for detail and an unwavering focus on quality. Dedicated to only one project at a time, our project managers also understand and offer exceptional project management and customer service. Our project managers are day-to-day contacts in field for our clients, and together with our designers, ensure that projects are completed on time and budget. As face of Altera Design to homeowners, our project managers are committed to providing a great experience as much as anyone in the company.

See to what our customers have to say about our Project Managers & crew.

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