ASSOCIATION IWCA - International Window Cleaning Association
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Kristina R.


Provided by YPmobile

You guys are the best!! Very professional and the work is outstanding! The guys were very nice and courteous as well :) see you next year!!

Sara D.


Provided by YPmobile

These guys are awesome! I had my house washed and my windows cleaned a few weeks ago and they still look great! They are very nice an professional. I totally recommend them..

Paul Z.


Provided by

Did an outstanding job washing and cleaning our front porch. They were very professional and paid attention to detail. Will definitely use them again and recommend to others.

Keturah J.


Provided by

I had my windows and gutters cleaned by these guys a couple weeks ago. They look great! When I look out my windows it's like watching HD TV they are so clean! The tech who did the job was super efficient and friendly. He even got along with my dog. I would highly recommend this business to anyone who needs some windows or gutters cleaned.



Provided by

Thanks for the great work on my pressure washing. My concrete looks like new. And my windows look great too. thanks demarks



Provided by

DeMark's window and pressure cleaning services was amazing! Not only did they call before showing up but they were on time. The workers were clean and polite. And they really knew what they were doing. My house wash and windows looked great. They also gave me a multi-service discount for getting both done on the same day. They also told me if my neighbours signed up for services for the same day they could get a 10% discount for their services, so next time me and my neighbor are doing our cleanings the same day



Provided by

About a week ago I had DeMarks come out, and I had a house washing, patio washing windowcleaning and my gutters cleared out. I am a very satisfied customer and plan on having them back out again. I will be recommending this company to everyone. THANKS!



Provided by

DeMarks did an AMAZING job!! I never knew my windows could ever be that clean and clear. I will definitly be calling them back in the fall. Great Job Guys!

Nick D.


Provided by

Great job on the house wash and windows!



Provided by



Provided by
Fantastic job!!! Work was sta...

Fantastic job!!! Work was started and completed on time, and exceeded our expectations! We will be using their services again in the future and will recommend DeMark's to all of our friends!

Nick D.


Provided by
I'm on tthe Board of a condomi...

I'm on tthe Board of a condominium complex in downtown Milwaukee and we have used DeMarks Window Cleaning several times to clean our windows. DeMarks is a highly professional quality company with competitive pricing. Their staff is flexible in terms of scheduling and willing to go the extra mile in terms of customer service. I would highly recommend them.



Provided by
The DeMark Window crew did a w...

The DeMark Window crew did a wonderful job with cleaning the windows of my condo. They were courteous and efficient. No more spending a whole day myself struggling with ladders and Windex. I plan to have them back every Spring.



Provided by
Thanks, you did a great job!!...

Thanks, you did a great job!!



Provided by
Thanks, Nick We were all ver...

Thanks, Nick

We were all very pleased with the job you did .



Provided by
We've had other window cleaner...

We've had other window cleaners come to our home in the past, and with each one we were dissatisfied, whether it be the staff or the service. Complete opposite when Demark's came. The difference was seen immediately! First the initial phone call then the most informative estimate, and of course the window cleaning! DeMark's even vacuumed our screens and sills. We will be using them again, finally a local company to rely on for consistently great service!



Provided by Superpages

Very friendly, professional and knowledgeable about window cleaning. Even had my concrete pressure washed- unbelievable how clean it became! Highly recommend DeMark's!



Provided by
5 Stars!

DeMark's was extremely helpful and clean window washers!!! Highly recommended for your home!! We were able to set up an appointment on a Saturday to work with my family's schedule, the company was very flexible with our needs. I couldn't believe how clean our windows became with the interior and exterior cleaning! The workers even removed the storms and screens; the windows have not been that clean since we first bought them! I recommend DeMarks for their great customer service and quality of work.

More Business Info

Quality Service Makes the Difference

Regular Hours
Mon - Fri:
Sat - SunClosed
Services Offered or Problems Solved: *Professional Window Cleaning *Residential/Commercial *Industrial/Institutional (Specified) *Homes/Flats/Victorians *Offices *High Rise Buildings *Apartments *Condominiums *Shopping Centers *All Combination Windows *Pressure Washing (Buildings) *Caulking/Other Repairs Skylights *Gutter Cleaning Service *Stuck Windows Opened *Theaters *Contract Cleaning - Day/Week/Month/Quarterly *Construction Clean-Up *Schools *Stores/Store Fronts *Steam Cleaning *Difficult Glass *Oxidation Removal *Complete Cleaning Services *Bucket Truck Available *Hotels/Motels *Nursing Homes *Banks *Institutions *Hospitals *Factories *Atrium Maintenance *Awnings/Decks *Stain Removal *Mirrors *New Construction/Renovations *Screens Cleaned/Repaired *Sidewalks Pressure Washed Confidence Factors: *High Rise *"2nd & 3rd Story Specialists" *"Heights No Problem" *Quality Work *Locally Owned & Operated Convenience Factors: *Insurance Work *Walls Cleaned
Payment method
visa, mastercard, check
DeMark's provides unsurpassed residential and commercial window cleaning. We have developed a company philosophy based on superior customer service, quality workmanship, efficiency and safety. Our definition of QUALITY measures a degree of excellence that both includes and extends beyond the service technician themselves, reaching into internal business operations to ensure performance to our customers expectations. Our many years of experience have enabled us to develop innovative and sophisticated techniques. Combine this experience with our professional staff, and we guarantee the best service available in Southeastern Wisconsin.
DeMark's dedication to outstanding customer service has translated well into commercial window cleaning and high rise window cleaning market. Property managers, building managers, restaurant managers, and janitorial companies have all appreciated DeMark's customer service orientated approach inside reputable commercial window cleaning properties. McDonald's, Olive Garden, Taco Bell, Hardee's and Buffalo Wild Wings are a few of the companies we represent the window & pressure cleaning for.
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Gutters & Downspouts Cleaning, Cleaning Contractors, Concrete Restoration, Sealing & Cleaning, Water Pressure Cleaning, Window Cleaning