P.O. Box 631596 Littleton, CO 80163

HIGHLINE by Mile High Designs


Remodeling & Additions 

You love being in the great outdoors but who says Highline can’t make your indoors just as inviting? We’ll make your home a retreat.


Decks, Covers & Pergolas

Let Highline optimize your outdoor space with innovative designs that allow you to enjoy our sunny mile high days all year long.


Quality Design, Service & Value

Highline has the innovative designs, quality craftsmanship and award winning customer service to bring your remodeling dreams to life.



by Mile High Designs

Here at 5,280 miles above sea level, we all love our Mile High nickname. Maybe a little too much. We know our clients love to refer their friends and family to Mile High Designs and we don’t want anyone to confuse us with other less than stellar Mile High service businesses. So we’re introducing a new name and online look with Highline. Don’t worry, we may be doing business as Highline but we’re delivering the same award winning service you’ve come to expect over the years from Mile High Designs.  



As a local family-owned business, Mile High Designs started small in 2005. With each completed project and satisfied client, our business continues to grow but we still think and act small. And that’s the key to our success today at Highline by Mile High Designs.  Using a small number of trusted employees, trade partners and suppliers, we have confidence that you’ll be just as satisfied as our past, and oftentime repeat, clientele. 

Highline is fully licensed, fully insured and trained in EPA Lead Safe techniques to protect your family. We maintain an A+ rating with the BBB and are a recipient of the BBB Gold Star Certificate. Call or email for your free design consultation and we’ll give you a copy of our extensive reference list and credentials in person.



Check out what we built for your neighbors. What can we build for you?

Interior Remodeling Project Gallery

Basement Remodels, Kitchens, Bathrooms & More

Take Me Indoors
Exterior Remodeling Project Gallery

Decks, Covers, Pergolas & More

Take Me Outdoors

The details are not the details. They make the design.

Using the same attention to detail we’ll bring into your home, we’ve given thought to every detail within our company to provide truly exceptional value and service on each and every project. And we want you to have access to those details too!

Our complimentary project management software Buildertrend provides direct messaging, progress photos, online payments, scheduling and more to all of our clients.


Our Team Leaders

Bringing over 30 combined years of industry experience to each and every project.

Ray Dertz


Ray Dertz

Owner & Company Manager

Ben Campbell

Project Foreman

Ben Campbell

Project Leader

How can we help you?

Contact Info

Prefer to contact us directly?

Email    Info@MileHighDesignsLLC.com

Phone  (303) 503-5597

Fax       (720) 362-5214

Where do we build?

We service a large portion of the Denver metro area and the mountain communities along Hwy 285 and I-70. Not sure if that applies to you? Just drop us a line and we would be more than happy to let you know if your project falls within our service area.