About Us


Our Promise is Simple:

Treat every job like it is our own home!

It is not just our team of experts, but our quality of service that defines DeMark’s Window & Pressure Cleaning. Since 2007, we have served residential and commercial customers in Madison, the Greater Milwaukee Area, and SE Wisconsin. We pride ourselves on innovative, cutting-edge technologies and products which produce superior results.


Nick DeMark, President of DeMark’s Window and Pressure Cleaning, started the business in 2007. He started the company as a window cleaning company but quickly added additional exterior cleaning services for residential and commercial buildings. Nick’s founding principles have remained consistent since the inception of the business. Nick knew using the very best equipment and cleaning technologies, hiring outstanding individuals, constantly training, tracking, and improving internal systems would provide customers with an expectational experience. 

Our Peace of Mind Guarantee:

 Factors to Choose the Best Power Washer

Careers with DeMark's

Learn How to Join the Team At DeMark's Window & Pressure Cleaning!