South Dakota

10 adopted codes · 35 cities tracked

Complete GuideEdition 2021

State Building Authority

Mandatory Codes (9)

IBC2021

International Building Code

ICC·Building

IBC 2021 — mandatory statewide via State Fire Marshal

IEBC2021

International Existing Building Code

ICC·Existing Buildings

IPMC 2021 — mandatory statewide (code_editions id for IPMC 2021 not available, using IEBC 2021)

IEBC2018

International Existing Building Code

ICC·Existing Buildings

IEBC 2018 — adopted statewide

IFC2018

International Fire Code

ICC·Fire Safety

IFC 2015 — mandatory statewide via State Fire Marshal

IFGC2018

International Fuel Gas Code

ICC·Fuel Gas

IFGC 2018 — adopted statewide

IMC2018

International Mechanical Code

ICC·Mechanical

IMC 2015 — mandatory statewide via State Fire Marshal (using 2018 edition id)

IPC2018

International Plumbing Code

ICC·Plumbing

IPC 2018 — adopted statewide

IRC2021

International Residential Code

ICC·Residential

IRC 2021 — mandatory statewide

NFPA 702020

National Electrical Code

NFPA·Electrical

NEC (NFPA 70) — mandatory statewide

Important Notes

South Dakota spans the northern Great Plains with extreme weather. Tornado Alley extends into eastern SD — ICC 500 storm shelters recommended. Heavy snow loads (25-56 psf) are a major design consideration, especially in the Black Hills. Frost depth reaches 42-60 inches — deep foundations required. The state is in Climate Zones 5A (southeast) and 6A (rest). Ice barriers are mandatory statewide. Seismic risk is low (Category A/B). The Black Hills region (Spearfish, Deadwood, Lead) has the most extreme snow and frost requirements. Most municipalities have adopted 2021 ICC codes; some smaller cities still use 2012 or 2018 editions.