1 Best ADU Builders in Des Plaines, Illinois
Verified ADU contractors and builders in Des Plaines, IL
Frequently Asked Questions — ADU Builders in Des Plaines
How much does it cost to hire an ADU builder in Des Plaines?
ADU construction costs in Des Plaines, Illinois vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Des Plaines to get accurate quotes for your specific project.
How long does it take to build an ADU in Des Plaines?
In Des Plaines, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Illinois local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Des Plaines?
Yes, a building permit is required for ADU construction in Des Plaines, Illinois. Your ADU builder will typically handle the permit application as part of their service. Illinois has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Des Plaines?
Common ADU types in Des Plaines include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Des Plaines ADU builder can advise on what's allowed on your specific parcel.