Your Complete Guide to Building or Buying an ADU in Glenwood Springs, Colorado | Avant Garde Aspen Luxury Real Estate
Stephanie Kroll
Stephanie Kroll
Are you thinking about adding an Accessory Dwelling Unit (ADU) to your property in Glenwood Springs? Whether you’re looking to create a rental unit for extra income, house aging family members, or build a flexible guest house, Glenwood Springs offers clear guidelines and opportunities for homeowners interested in ADUs.
Below, we break down what’s possible, what you need to know, and how to get started — all based on the City of Glenwood Springs’ official ADU regulations.
An Accessory Dwelling Unit (ADU) is a smaller, independent residential dwelling located on the same lot as a single-family home. ADUs are also known as backyard cottages, granny flats, or in-law suites. They typically have their own kitchen, bathroom, sleeping area, and entrance.
According to the City of Glenwood Springs, ADUs are allowed in all residential zoning districts where single-family detached dwellings are permitted. This means many homeowners throughout Glenwood Springs may be eligible to add an ADU to their property.
Here are the main things you should know before planning an ADU in Glenwood Springs:
An ADU must be no larger than 850 square feet or 50% of the main dwelling’s floor area, whichever is smaller.
Detached ADUs must also meet minimum lot size requirements depending on your zoning district.
Either the primary dwelling or the ADU must be owner-occupied. This requirement ensures that these units remain integrated within the neighborhood.
Short-term rentals (less than 30 days) are generally not allowed for ADUs.
One additional off-street parking space is required for the ADU, unless the property is within the Downtown Development Authority (DDA) boundary, where some exemptions may apply.
Detached ADUs must complement the existing house and neighborhood character.
ADUs can be attached (like a basement or garage conversion) or detached (like a backyard cottage).
Building an ADU can help you:
Generate rental income to offset your mortgage or living expenses.
Provide housing for aging parents, adult children, or caretakers.
Increase your property value and flexibility for future needs.
The City of Glenwood Springs has made it relatively straightforward for homeowners to plan and permit ADUs:
1️⃣ Review Zoning & Lot Requirements
Start by verifying your zoning and lot size on the City’s official ADU page.
2️⃣ Contact the City’s Community Development Department
City staff can help you confirm what’s possible on your lot and answer questions about permits and inspections.
3️⃣ Work With Professionals
Consider hiring a local architect, designer, or builder familiar with Glenwood Springs’ ADU codes to help navigate the design and permitting process.
4️⃣ Apply for Permits
Submit your building plans and permit applications. Make sure your ADU meets all building code and safety standards.
🔗 City of Glenwood Springs ADU Page — Official rules, applications, and contacts.
📞 Community Development Department — Reach out for personalized help.
🛠 Local Builders — Find experienced contractors who understand local ADU requirements.
Glenwood Springs is embracing accessory dwelling units as a smart solution to housing needs and changing lifestyles. By adding an ADU, you can create more living space, generate income, and increase your property’s value — all while contributing to a vibrant and diverse community.
If you’d like help navigating Glenwood Springs’ ADU rules or want to connect with trusted local designers and builders, reach out anytime — I’m always happy to help homeowners unlock the full potential of their properties!
Interested in ADU properties in Glenwood Springs? Contact me today to start your real estate search:
303.345.5886
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