Custom View Windows is a family business. John Zellmer has been president for over 20 years.

Pella's Designer Series Wood Patio Doors offer French or Contemporary styling.

Easy care, energy-efficient vinyl windows from Sunrise don't need painting, staining or refinishing.

From bow to casement, Custom View Windows can install any type of window to meet your needs!

Custom View Windows offers entry doors, storm doors, patio doors and more!

Exquisitely detailed wood windows in custom shapes, sizes, grille patterns, exterior colors, and more.


Custom View Windows sells high quality windows, entry, storm and patio doors in and around Cedarburg, Grafton and Mequon, Wisconsin.  Whether you dream of a new bay or bow window for the living room, double-hung windows for the bedroom, or a customized solution.….we can help. Our company has served the Ozaukee County area of Wisconsin for over 20 years. Please check out the rest of our website to learn a little about our company and our products. We look forward to hearing from you soon!

Call (262) 377-5051or e-mail us at
to set up a free, in-home estimate!

Weeknights and Weekends: please leave us a
message and we will return your call promptly.


Bay & Bow Windows
Garden Windows
Double-Hung Windows
Picture Windows
Slider Windows
Awning Windows
Casement Windows
Entry Doors
Storm Doors
Contemporary Patio Doors
French Patio Doors
French Hinged Patio Doors

Old world craftsmanship skills

John Zellmer is a man with old world craftsmanship skills. He is the only one we call for replacement windows and doors.

Ralph and Carol Luedtke,
Cedarburg, WI

Attention to detail

We particularly appreciate John’s attention to detail. He is able to problem solve at the job site. He gives opinions and listens to our wishes. He and his crew do quality work. He is pleasant and easy to work with.

Jim and Jacquie Branchford
Colgate, WI

They deliver in a first class way

Custom View Windows is spectacular! From workmanship, to follow up, to service, they deliver in a first class way. It is a delight to have them work on my home.