Back in 1951, S.J. Janis Company began with the goal of helping Wisconsin homeowners. From heating to carpentry and eventually siding and roofing, the legacy of providing the highest quality service with expert craftsmanship has remained true to this day.
Now a fully certified design-build firm, our award-winning team has been the most trusted name in home renovation throughout Southeast Wisconsin. We’ve collaborated with more than 1,400 homeowners (and counting!) to transform their existing homes into the meaningful living spaces they’ve always wanted.

Make your dream home a reality.
When you partner with us, you get a team of experts for every step of the process, from consultation to design to build and beyond.
We strive to deliver exceptional craftsmanship and construction quality, plus outstanding customer service via constant communication while remaining on schedule and budget.
Since opening our doors in 1951, we’ve transformed more than 1,400 homes.
With over 115 awards under our belt, you can be confident that when you choose us, you’ll enjoy awe-inspiring results.
Embark on the journey to transform your space by scheduling a complimentary consultation with our team of experts.
When you work with S.J. Janis, you get a team of experts for every step of the process, from consult to design to build and beyond. Having in-house experts for every step of the process allows for constant collaboration, clear understanding, and seamless transitions.
We realized early on that we weren’t just renovating living spaces. We were transforming the quality of life for every family that hires us. And we dedicated ourselves to making sure every family got our absolute best every time. That means exceptional craftsmanship and construction quality, plus outstanding customer service via constant communication and remaining on schedule and budget.
If you’re reading this, there’s a good chance someone you know referred us. In fact, more than half of our business comes from referrals. Our reputation for quality work and excellent customer service has led to us earning Guild Quality rankings of 98% in the value of “trust,” 99% in “expertise,” and 96% in “would work with S.J. Janis again or recommend them to a friend.”
If you want it done, we can do it! We evaluate all the possibilities of a challenge and can often come up with several options. We are also proactive and will fill a need when we see one, whether it is in direct relation to your project or not.
We clean up at the end of each day. We set up zip walls and take dust preventative measures to keep your home as clean as possible. Finally, at the end of your job, we conduct another cleaning to make your house shine!
We do as we say and we are all shepherds of the company. Employees are always looking out for the client’s best interest by giving an honest, well thought out opinion.
Our ultimate goal is to prove to you that we are your trusted home advisor. We understand it can be difficult to find a contractor you can trust and have faith in to remodel your home. We want you to feel comfortable calling us for all your home projects. Our quality of service can be provided to you no matter how big or small the project.
Award-winning services begin with an exceptional team. The design-build team at S.J. Janis consists of knowledgeable, professional, experienced designers and craftspeople who strive to deliver superior results.
Our team members bring years of experience to each project, ensuring that your renovation will yield unparalleled results, whether you’re remodeling a single room or reimagining your entire home.
You can rely on the experts at S.J. Janis for your complete design-build services, from the initial design to the final walkthrough.

NICK
PRESIDENT AND CO-OWNER

GARY CR, CGR
VICE PRESIDENT AND CO-OWNER

Barb
Bookkeeper

Kathryn
Office Manager

JOE, CKBR, UDCP
DIRECTOR OF DESIGN

SARAH
DESIGNER

Daniel
DESIGNER

CASEY
DESIGN CONSULTANT

VINCENT
PROJECT COORDINATOR

CORY
PRODUCTION MANAGER

NIK
Lead Carpenter

DAN
Lead Carpenter

JIM
Finish Carpenter

JOSEPH
Carpenter
Original owner Samuel Joseph Janis opens S.J. Janis as an offshoot of the Standard Heating Company.
Janis expands his company’s services in the summertime, providing carpentry as well as siding and roofing projects for his heating clients.
S.J. Janis relocates office to 3127 W. Greenfield Ave.
Gary Sannes joins S.J. Janis as a sales representative.
S.J. Janis sells the Standard Heating Company and relocates S.J. Janis to 3228 W. National Ave.
Gary Sannes becomes the owner of S.J. Janis and incorporates the company with the goal of expanding business from home improvements to remodeling.
Sannes hires the company’s first full-time Salesperson.
Sannes was elected President of the Milwaukee NARI Home Improvement Council.
S.J. Janis is inducted into the “Big 50” remodeling industry hall of fame.
Sannes was elected President of the Milwaukee NARI Foundation.
S.J. Janis won its first Wisconsin Remodelers Award from NARI and has won an award every year since 1989.
Sannes hires the company’s first full-time In-House Director of Design.
Sannes hires the company’s first full-time Production Manager.
We relocated our office to 11501 W. North Avenue in Wauwatosa, doubling our office space.
S.J. Janis has (5) Certified Remodelers on staff.
Sannes was awarded the NARI National Professionalism Award.
The S.J. Janis Company won the Standards of Excellence Award form the Metropolitan Builders Association.
Guildquality “Guildmaster Award” winner every year since 2007
Nick Sannes Joins S.J. Janis fulltime as Director of Marketing.
Nick Sannes becomes President.
We relocated to Elm Grove to triple our office space and to maintain a central location to serve our clientele.