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Northern Colorado Parade of Homes: How One Berthoud Build Earned Four Awards

October 1, 2026/in Uncategorized/by andrew@mkemarketingpartners.com

Every fall, builders across the region open their doors and invite the public to judge […]

Build Your Own House: What to Know Before You Start in Northern Colorado

October 1, 2026/in Uncategorized/by andrew@mkemarketingpartners.com

Deciding to build your own house, or more accurately, deciding to have one built for […]

How to Build a House on Your Own Land in Northern Colorado

September 1, 2026/in Uncategorized/by COS Builders

If you are wondering how to build a house on your own land, the process […]

REVIEWS

See what our clients are saying

    
 
 
       Posted on Google  
   
   Andrea Dunlap 
 
 
 
 Trustindex verifies that the original source of the review is Google. Custom On-site Builders are extremely knowledgeable regarding how to build.They have many Clients that are repeat Clients. That tells you a lot about customer satisfaction.
  
 
      Posted on Google  
   
   Mark Shaw 
 
 
 
 Trustindex verifies that the original source of the review is Google. Won’t use any other builder
The best by far
  
 
      Posted on Google  
   
   Tara Moreno 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have worked with Custom On-Site for years and they are by far the best builder. They operate with integrity, passion, loyalty and commitment to their clients. Their workmanship is top-notch and they have received many awards for this. When it came time for our remodel on our own home, they were the ones! They transformed our home into our dream home. I recommend Custom On-Site to everyone I know, for new builds, custom builds on private land, remodels and basement finishes.
  
 
      Posted on Google  
   
   Jim Richter 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have worked with custom on-site for a number of years and have had a excellent experience with them, they truly are a superior builder
  
 
      Posted on Google  
   
   Mamaw Freel 
 
 
 
 Trustindex verifies that the original source of the review is Google. We've had a great experience with Custom On-Site Builders!  Responsive, thorough, and friendly!  Highly recommend!
  
 
      Posted on Google  
   
   Brian Terpstra 
 
 
 
 Trustindex verifies that the original source of the review is Google. I have worked with Custom On Site for many years. They build a quality home and have a good reputation in Northern Colorado. If you are in the market make sure to check them out.
  
 
      Posted on Google  
   
   Bryan Clymer 
 
 
 
 Trustindex verifies that the original source of the review is Google. Kurt and the whole team was amazing.  we only had a small project but will use them again when we expand.
  
 
      Posted on Google  
   
   Mary Lou Stoltzfus 
 
 
 
 Trustindex verifies that the original source of the review is Google. Reliable high quality builder!   They stand behind their product!   Great folks!
  
 
      Posted on Google  
   
   Pam 
 
 
 
 Trustindex verifies that the original source of the review is Google. Top-notch contractor. Honest and shoot straight. - gave us accurate information throughout the entire project. Were very tolerant of us "over-seeing" the work. Confident our project would not have been as successful with another contractor. Consider using them for YOUR next project.