Vision to Reality

We help busy homeowners build their vision while avoiding construction pitfalls that create unnecessary delays. Our smooth and efficient home construction process was built with decades of experience allowing us to help you bring your vision to reality.

Custom wine cellar in California modern home remodel

What We Do

Honest Work Builds Lovable Homes

We believe every family deserves a space they can be proud of, where they can relax and make memories together. That's why we offer honest contracting services to help you avoid the headaches and heartaches of working with unreliable companies. Let us help you build a better future, one brick at a time.

Arch celling and wall with decor in place on each shelf and bright window for natural lighting

Living Room project completed fully furnished

Who We Are

The Innovators Behind Our Homes

Michael Mok, Business Strategist and Serial Executive

I grew up in a home where a contractor never finished the job. We laugh about it now, but for 25 years, we had an unpainted wall, so I firmly believe that any job started should be finished, down to the details.
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Pictured: Michael Mok. Michael is a highly skilled construction expert with a background in business leadership and biotechnology and a passion for design. His experience in construction is accompanied by expertise in business management, strategy, and vendor management, making him a valuable and reliable leader.

Who We Are

The Innovators Behind Our Homes

Greg Ryczkowski, General Contractor, Serial Entrepreneur

I was forced to leave my home in Poland with nothing but a suitcase, and I never want anyone to feel like I did. This is why I do what I do. Because a home is the most important thing in your life.

Home construction with our staff inspecting the progress

Our Approach

A Streamlined Process for Exceptional Results

Your home is a reflection of yourself so we take the time to listen carefully to understand your unique needs and wants.

Step 1

Share Your Vision

Your home is a reflection of yourself so we take the time to listen carefully to understand your unique needs and wants.

Step 2

Develop a Project Plan and Financial Forecast

We’ll work with you to turn your colossal concepts into detailed designs, tested, vetted and ready to build.

Step 3

Break Ground on Your Big Project

The big moment is finally here. We work together to implement your ideas, one step at a time.

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Meet our team

Our team is a diverse set of individuals that will help you bridge the gap to complete you next project.

Michael Mok

Cofounder, Principal

Michael Mok leads the day-to-day operations and business management. As the past Vice President of Artistic Stone Kitchen and Bath, he led the company to win recognition as one of Inc. Magazine’s 5000 fastest-growing businesses in 2008. He was responsible for all aspects of business management including strategy, vendor management, partnerships, hiring and firing contractors and sales team. He was the former board member for NARI Silicon Valley for 3 years. His previous career was in biotechnology. Michael co-invented 5 patents in stem cells and gene therapy related to diagnostics and production. He worked full-time in biotech while he earned his MBA from Santa Clara University and funded part of his undergrad degree in Biochemistry and Molecular Biology from U.C. Santa Cruz by trading stocks and working for a biotech company. In 2009, Michael started investing in real estate buying rental properties in California. He grew up in Palo Alto and attended Palo Alto High School.

Gregory Ryczkowski

Cofounder, Principal

Greg Ryczkowski leads the construction operations. He built his first business venture, a 2,000 sq. ft. wrestling sports club, at the age of 21. He had just finished at Civil Engineering Technical School and was continuing his education at the Academy of Physical Education in Warsaw, Poland. Due to the political situation in 1986, he was forced to leave Poland for the U.S. via Paris. He arrived in the U.S. with nothing and started as a Masonry contractor setting tile and stone while taking English and business classes in accounting, law, and taxation. Two years later, he bought his first house in Hayward and opened his stone fabrication business, Marble and Stone Works. He had numerous successes in selling two stone companies and a Polish restaurant. During this period, Greg moved to Palo Alto to buy his first rental property and to start his general contracting company. From 2004 to 2007, he worked as a Mortgage Broker at Bankers Preferred to better understand real estate financing. His goal has always been to educate himself to be a sophisticated real estate investor and builder to best serve his partners, clients and investors.

Rich Mathers

General Contractor – Advisor

Rich brings the heart and soul of Rich Mathers Construction to El Centro Builders, his attention to quality and detail, and a refreshing transparency and integrity to every project. With over 30 years experience in construction and hands-on experience in carpentry, Rich stays closely involved in all phases of your project, providing you with timely updates and open communication every step of the way. In his spare time, you’ll find Rich improving his single-digit golf handicap, riding his KTM motorcycle, or traveling with family and friends.

Peter Ryczkowski

General Contractor

Peter Ryczkowski has worked in construction since 1998. Starting out as a stone and tile installer. With job sites often not being ready, Peter took on more active roles including plumbing and cabinet installation. In 2002, due to demand, he added general contractor classification to the license. After over a decade of working sites, he now supervises and creates designs. Using the experience of being a laborer and knowledge of codes, he combines it with his design expertise he gained at AAU. Often creating drawings by hand and in CAD. He studied at San Jose State University and the Academy of Art University in San Francisco. He is currently getting a second degree in Civil Engineering.

Leszek Lyszczarz

Project Manager – Partner

Leszek is a meticulous project manager who started his career in the stone and tile industry for over 20 years. He is in charge of day to day job site operations to ensure the team passes the city and county inspections. He knows how to troubleshoot installation issues when they arise.

Sakiko Ueno

Operations Manager – Partner

Sakiko Ueno graduated from San Jose State University with a degree in Interior Design. She began her career at Artistic Stone Kitchen and Bath, a tile and stone fabrication company where she held numerous roles in sales and operations. Afterward, she worked for Boston Trade International and interior design and product procurement services to hotels during construction and renovation. Currently, she is a critical partner for our design and engineering partners in collaborating with them and the homeowners to get our homeowners to start construction.

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