Our Story

Mile High Designs was formed in 2005 as a small two man subcontracting crew. With a lot of hard work, we’ve grown into a highly rated family business with a team of valued employees and trade partners ready to transform homes throughout the Denver metro area and mountain communities along Hwy 285 and I-70.

In 2019, after a few cases of mistaken identity and a lot of consideration, we started transitioning to doing business as Highline. There are so many ‘Mile High’ service companies out there and we don’t want to be mistaken for other less than stellar competitors.

But don’t worry, Highline is still delivering the same award winning service that made Mile High Designs thrive. Contact us today and let us know how we can help you.

Our clients love us but we love them more.

Current reference list provided during design consult.
Highline by Mile High Designs
Based on 7 Reviews
Rachael D.
Rachael D.
2021-10-01 22:57:44
Selling Real Reviews for Your BusinessGuaranteed confidentiality and quality of reviewsAll accounts of real users, with reviews and friendsYelp accounts...
Joni J.
Joni J.
2021-05-18 10:22:52
Selling reviews Yelp, googleWe write reviews, promote your companiesGuaranteed confidentiality and quality of reviewsAll accounts of real users, with...
Rexford H.
Rexford H.
2020-03-26 19:07:52
The bid process of getting a new deck was frustrating and exhausting to say the least. I recieved 8 bids ranging from 28k to 65k all giving me a wide...
Liz G.
Liz G.
2019-01-15 08:55:28
Ray and his team built our deck and they were great to work with. They showed up with they said they would, they communicated with us, and they finished on...
Cooper S.
Cooper S.
2017-12-10 12:56:18
I've been looking for an honest, straight forward and talented contractor and the name Mile High Designs kept coming up. Took a look at the website and...
E M.
E M.
2013-03-17 11:09:39
Ray Dertz and Mile High Designs completed a 500 sqft covered patio to our home in the Summer of 2012. From the beginning of the project to months after,...

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Ray Dertz in Littleton, CO on Houzz
Ray Dertz in Littleton, CO on Houzz

Check out what we're building in your neighborhood.
What can we build for you?

Testimonials from our wonderful clients.

Thoughtful design. Thoughtful customer service.


Complimentary project management software on all projects.

  • 24/7 access to project details on Buildertrend site and app
  • Secure messaging
  • Progress photos
  • Scheduling calendar


The Highline Team

Ray Dertz

Owner &

General Manager


On-site Project Leader

All of our employees are covered by workers comp coverage.

We're open for business year round!

What can we do for you?


Our employees are important to us and we love to keep them busy year round. Contact us today and see how we can help you maximize your budget for any project, big or small. We’ve got the home remodeling solution you need, indoors or outdoors.

Highline: P.O. Box 631596 Littleton, CO 80163

P: 303-503-5597

F: 720-362-5214