Keystone Construction
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Keystone Construction and Development, Inc. has been in the Magic Valley since 2006. During that time, we have built countless homes and developed several residential subdivisions. We pride ourselves in having a trustworthy team where honesty, communication, attention to detail, and daily supervision is the foundation of our business.

The owner, Colby Walter, is the only builder in the Magic Valley that has earned the Graduate Master Builder (GMB) and Certified Green Professional (CGP) designations with the National Association of Home Builders (NAHB). Feel free to browse some of our 'stock' plans or contact us for help designing a custom home.

If you already have your home design complete, bring it to us! We routinely bid existing home plans, and offer an 'open-book' business model so you can be involved not only with design and feature selection, but also financial decisions along the way. Please contact us for a free consultation regarding your construction project.
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Colby Walter is the President of Keystone Construction and Development, Inc. He graduated from Brigham Young University in 1998 with a Bachelor's degree in Construction Management. From a young age, he learned about the home building and real estate industries by working with his father in the Salt Lake City area.
Colby Walter is the President of Keystone Construction and Development, Inc. He graduated from Brigham Young University in 1998 with a Bachelor's degree in Construction Management. The Walter family has called Twin Falls home since 2007, where Colby utilizes his training and experience in the construction and real estate industries, and where he enjoys the lifestyle that Southern Idaho offers.
We can build practically anywhere there's available land - just let us know where you want to live. One of Northwest Twin Falls newest developments located near St. Luke's Hospital, restaurants, and shopping. Country living with City Amenities. Just a short drive from Twin Falls across the canyon can save you $35,000 in building lot costs!
We had an awesome experience working with Colby Walter of Idaho Legacy Real Estate! He represented us both for the sale of our previous home and the purchase of our new (current) home, and now we are working with him to build an addition to our home (he is a building contractor). He is very responsive and professional.
Reviews (3)
Kate
Kate
Jun 24, 2019
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Great company to work with. Colby is patient and great to answer questions, meet after hours to work with our schedule and was so patient in looking at several properties with us and giving us an idea on what remodels might cost. He is an excellent contractor and realtor. I wouldn't use anyone else in Twin Falls.
Andrew Mix
Andrew Mix
Jun 16, 2018
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I have used Keystone for commercial and residential remodeling projects. My neighbors have noticed the efficiency and quality workmanship, and have asked about my experience, so I decided to share it here.
When I remodeled my office, I already had an idea of how I wanted it to look. Keystone made it happen - all the way through the design, permitting and building phases - and we were able to complete the project on time despite some delays and difficulty dealing with the city building department.
With our home remodel, I was again impressed at the excellent communication and attentiveness to
Brian Jensen
Brian Jensen
Dec 10, 2017
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The owner, Colby, is great to work with and has always been flexible to work around our schedules and time. He is honest and does great work. He even showed us a property after hours late one night because of a time crunch. Thanks Keystone Construction!