Accessory dwelling unit companies

Looking for accessory dwelling unit companies in Fort Collins, CO? Call AccessoryDwellingUnit Pros for a contact a provider — no obligation. Licensed adu builders serve Fort Collins and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.

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Frequently asked in Fort Collins

What are the disadvantages of ADUs in Fort Collins?

How much does an ADU cost in Colorado?

The cost of an ADU in Colorado, including Fort Collins, varies significantly based on the unit's size, the chosen design, and the quality of materials selected. Site preparation, utility connections, and any necessary foundation work also play a role in the overall expense. To receive an accurate cost, a personalized quote is essential. Call us to get yours.

What are the rules for ADUs in Colorado?

Colorado has statewide laws encouraging ADUs, but specific Fort Collins ordinances are also crucial. These typically cover aspects like minimum lot sizes, setback requirements from property lines, and maximum height restrictions for the dwelling. Ensuring compliance is key to a successful build. We can help you navigate these regulations.

Is an ADU allowed in my Fort Collins neighborhood?

Generally, ADUs are permitted in most residential zones within Fort Collins, provided specific requirements are met. These often relate to the size of your property and any existing structures. To get a definitive answer for your address, consulting with an expert is highly recommended. Call us for clear guidance.

What are the steps to building an ADU in Fort Collins?

Also serving nearby: Greeley · Longmont · Boulder · Thornton · Westminster

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More on this: HUD ADU resources — ADU policy and financing research.

Service area details

170,376residents

2,976per sq mile

8ZIP codes served

Serving all of Fort Collins — population 170,376; about 2,976 residents per square mile across 57.2 sq mi. ZIP codes covered include 80521, 80522, 80523, 80524, 80525, 80526, 80527, 80528.

Neighborhoods served in Fort Collins: Old Town, Drake, Fossil Creek, Laporte Avenue, Harmony Corridor — and every surrounding area.