South Dakota

South Dakota's housing market has tightened as communities like Sioux Falls and Rapid City continue to grow. Accessory dwelling units offer homeowners a way to add housing on their existing lots. ADU Pass helps South Dakota property owners manage the permit process.

454 ZIP codes
69 Counties
320 Cities

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State ADU details

State insurance regimes

South Dakota's residential property insurance market is regulated by the South Dakota Division of Insurance (within the SD Department of Labor and Regulation) under SDCL Title 58. The state does NOT operate a FAIR Plan, wind pool, or other insurer of last resort — South Dakota is one of fewer than 20 states without a residual-market mechanism for fire-and-extended-coverage homeowners insurance. The voluntary admitted market is the sole avenue; properties unable to obtain admitted-market coverage must seek surplus-lines coverage. Severe convective storm and hail are the dominant catastrophic perils and are reflected in admitted-market rates rather than via a separate hail or storm pool.

checked 2026-04-26
Federal (United States) — ADU-relevant rules and programs

Federal ADU law

The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.

checked 2026-04-20

Federal financing programs

Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.

checked 2026-04-20

Federal tax credits

There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.

checked 2026-04-20

Federal housing programs

HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.

checked 2026-04-20

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