Accessory dwelling unit services

Looking for accessory dwelling unit services 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.

About this service

These services cover the entire lifecycle of building a backyard home, from initial property assessments and architectural design to navigating local zoning permits. You need this when you want to add living space to your property but don’t know where to start with city regulations or site feasibility. Professionals handle the paperwork, site planning, and technical requirements so you can focus on the final layout and how you plan to use the additional square footage on your lot.

Frequently asked in Fort Collins

What are the disadvantages of ADUs?

Disadvantages can include increased utility costs and potential impacts on your neighbors' privacy or parking. Construction itself can also be disruptive. It's important to consider these factors when planning your ADU.

How much does an ADU cost in Fort Collins?

What are the rules for ADUs in Colorado?

Colorado has state laws that encourage ADUs, but Fort Collins also has its own specific municipal codes. These address things like lot size, setbacks, and occupancy. Knowing these local rules is vital for compliance.

Is an ADU allowed in my Fort Collins neighborhood?

What permits are needed for an ADU in Fort Collins?

You will need to obtain building permits from the City of Fort Collins. This involves submitting detailed plans for review against zoning and building codes. The pros we work with are familiar with this process.

Grant programs for ADUs are more common in states like California, and specifics can vary. While Colorado may have different incentive structures, it's worth asking the specialists about any available funding or financing options.

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

All cities in Colorado →

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, Harmony Corridor, Drake Road, Midtown, Fossil Creek — and every surrounding area.