Greg was 12 years old when he first found his passion. He was sitting next to his father, also in the trade, riding in their work van on the way to the lumber yard. He looked over at his dad and realized he wanted to be just like him. At the time, he saw a respected man who knew a hard day’s work and knew how to be good to people and be good at what he does. As Greg grew up in the trade, he wanted to continue the proud tradition of quality craftsmanship, building and remodeling homes to help families feel safe and comfortable. He wanted to give people quality work that they could be proud of, that would last generations, just like his father.

Greg spends most of his time on project sites, working closely with the team. He enjoys new challenges and any builds that require a lot of customization – for Greg, the more detailed the work, the better. He also takes pride in teaching his team the tradition of stick framing in the right way. Greg believes in doing things the right way, the first time, and loves to see their projects come together.

When he’s not on the job, Greg loves spending time with their children, Mason and Isabella. Greg is also a major Wisconsin sports fan – he’s a Badger, Brewer, and Packer fan all the way! When he can find free time, he likes to spend time outside.




Wendy began her administrative career as an office manager for a fire protection company. It was there that she learned everything from customer service, to brokering deals. Her natural sense of humor and attention to detail were a perfect fit for clients when she and Greg started Renz Construction in 2008. Her tenacious attitude and drive helps to keep projects on time. Wendy often visits work sites to take detailed photos of projects to keep her clients in-the-know at all times.

Wendy meets with all team members of the project, from architects to engineers to clients, to make sure all projects run smoothly and to her standards. To ensure their clients have an amazing experience, Wendy tackles all the paperwork and expediting. From researching local codes to pulling permits, Wendy is the reason projects move forward quickly! Wendy acts on behalf of all their clients, going to local municipality meetings to get all permits and paperwork approved on-time.

When Wendy isn’t in the office or at the job site, she’s usually spending time with Greg, Mason, and Bella. Wendy loves gardening, walking their dog, Chewbacca, and taking in a movie with the whole family. Just like Greg, she’s an avid Wisconsin sports fan, and they all enjoy watching games together.

Circular photo of Tony



Bio coming soon!

Mason Renz

Apprentice Carpenter

Mason has been helping out with Renz Construction for the past two years and has since become an official apprentice carpenter with our team. He’s lived in Lake Country his whole life and has grown up watching his parents provide top-notch contracting services to families throughout Waukesha County.

He was inspired to join the family business because he’s always been around it and became even more engaged after Greg and Wendy told Mason about Greg’s carpentry experience with his own father. He’s very proud of everything his family has accomplished and is eager to help build the business.

Mason loves every aspect of working with Renz Construction and isn’t afraid to try his hand at many of the skills of jobs that accompany their large-scale remodels and new home construction projects.

When Mason isn’t working and isn’t at school he enjoys hunting, fishing, working, and hanging out with friends. He also likes spending time with his mom and dad, his sister Bella, his girlfriend, and his cousins.


Apprentice Carpenter

Dylan has been with Renz since 2021. Living in Lake Country his whole life, Dylan has an eye for residential construction trends in our area. He’s currently exploring future career paths and is working with Renz Construction to master carpentry.

Dylan particularly enjoys roof trussing days and loves seeing projects come together from the ground up. When he’s not honing his carpentry skills with Renz Construction, you can find Dylan four-wheeling, hunting, and playing (and watching) basketball.


Apprentice Carpenter

Braden has been working with Renz Construction since 2020 but his carpentry and construction experience goes well beyond that, into his early childhood working with his dad and uncle. He really enjoys the hands-on nature of carpentry and likes spending his time with the Renz crew, working on different projects.

In his free time, Braden likes to hunt and fish. He also likes to spend time outdoors four-wheeling in the fall, spring, and summer, and snowmobiling in the winter.


Renz Construction is proud to announce our partnership with Dream Build Developers, a residential renovation group dedicated to designing and renovating lake homes in our area to create move-in-ready masterpieces.

Dream Build Developers


Ready to get started on a new project for your home?  Contact Renz Construction at 262-490-6368 or click on the link below for our contact form so we can get started!