Cost to build accessory dwelling unit

Looking for cost to build accessory dwelling unit in Des Moines, IA? Call AccessoryDwellingUnit Direct for a contact a provider — no obligation. Licensed adu builders serve Des Moines 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 involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

The expense of building an ADU varies based on site preparation, whether you need to run new sewer or electrical lines, and the level of interior customization you choose. Larger custom builds naturally require more materials and labor than simpler conversions. We provide exact pricing confirmed free on the call.

Frequently asked in Des Moines

What are the disadvantages of ADUs in Des Moines?

Potential downsides include the initial cost of construction and the time it takes to complete. You’ll also want to consider ongoing maintenance and any local zoning changes. A local pro can help you understand these aspects for your Des Moines ADU.

How much does an ADU cost in Des Moines?

What are the rules for ADUs in Des Moines?

Is an ADU allowed in Des Moines?

Yes, Accessory Dwelling Units are permitted in Des Moines. The city has regulations in place to allow for their construction. A professional can help confirm that your property meets all the necessary guidelines for building an ADU.

What's the process for building an ADU in Des Moines?

The process generally involves design, securing necessary permits from the city, and then proceeding with construction, including site preparation and utility hookups. Final inspections are a required part of the process. Local pros in Des Moines manage these steps efficiently.

Also serving nearby: Cedar Rapids · Omaha · Davenport · Lincoln · Independence

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

Service area details

210,381residents

2,386per sq mile

8ZIP codes served

Serving all of Des Moines — population 210,381; about 2,386 residents per square mile across 88.2 sq mi. ZIP codes covered include 50301, 50302, 50303, 50304, 50305, 50306, 50307, 50308.

Neighborhoods served in Des Moines: Waterbury, Drake Neighborhood, Sherman Hill, Beaverdale — and every surrounding area.