1 Best ADU Builders in Irmo, South Carolina
Verified ADU contractors and builders in Irmo, SC
Frequently Asked Questions — ADU Builders in Irmo
How much does it cost to hire an ADU builder in Irmo?
ADU construction costs in Irmo, South Carolina 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 Irmo to get accurate quotes for your specific project.
How long does it take to build an ADU in Irmo?
In Irmo, 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 South Carolina local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Irmo?
Yes, a building permit is required for ADU construction in Irmo, South Carolina. Your ADU builder will typically handle the permit application as part of their service. South Carolina has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Irmo?
Common ADU types in Irmo 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 Irmo ADU builder can advise on what's allowed on your specific parcel.