Accessory Dwelling Units in Longmont, CO
Accessory Dwelling Units
Often called mother-in-law suites, backyard cottages, garage, or basement apartments, these areas add to your functional living space and increase the value of your home.

Our Accessory Dwelling Units: Built to Last
An ADU is part of the property of your main home. If you are thinking about having one built, whether for your parents, guests or potential tenants, Koeppen Construction can lend you the assistance you need. We have years of experience in building accessory dwelling units in Longmont, CO. If you are looking for a contractor to get the job done, reach out to us.
Interior Planning
Efficient Designs
We value efficiency in our work. That’s why our designs reflect the same. We want to increase the efficient flow of foot traffic in your space, so you can make the most out of every inch in the room. Whether working on an extensive renovation or basement apartments in Longmont, CO, we are experts at handling these projects. We know what it takes to make plans work, so we can guide you along to ensure you make the best possible decisions.
Professional Staff
Our certified contractors are trained to deliver successful outcomes. We employ a crew of skilled and experienced contractors who know how to get the job done and done well, so you won’t need to worry about mistakes. With us by your side, you can make decisions with confidence, knowing that we’re there to guide you through the process.
Extensive Portfolio
We’ve completed many ADUs for clients over the years. If you want to learn more about these units and are interested in hiring us to create one for you, call us.
We also serve Boulder, Erie, Lafayette, Louisville, Frederick, Firestone & surrounding areas.