Sac County, IA zoning map, flood zone and property lines by address
Free, no account. Or open the Iowa map and tap a lot.
Towns in Sac County: Sac City, Lake View, Odebolt.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's countywide study for Sac County has 46 FIRM panels, the newest effective June 2022; no coastal V zones are mapped in it.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Sac house comes from a licensed surveyor and is often on file with the county or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the Iowa county parcel layers (each county publishes its own), so a Sac lot shows the same lines the county assessor draws. Sac County covers about 368,014 acres of land and 2,118 acres of water.
Mapped lines are approximate. The Sac County assessor keeps the parcel record (Sac County website); a licensed surveyor sets the true corners.
Zoning
Sac County zones its unincorporated land, and Sac City, Lake View, Odebolt each zone the land inside their limits. ParcelSheet shows the use the county assessor lists for the lot and links the county zoning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Iowa's county zoning law (Iowa Code Chapter 335), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Sac lot can add one depends on its district; the county zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Sac County is soil survey area IA161, Sac County, Iowa, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Sac County needs a permit from the Sac County environmental health department (county board of health, under Iowa Department of Natural Resources rules).
Setbacks
Setbacks in Sac County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county zoning office gives them for the lot's district, and Sac City, Lake View, Odebolt for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Sac lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Sac County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's countywide flood map for Sac County has 46 panels, the newest effective June 2022. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Sac County?
Open the Iowa map, type the address, and the parcel outline from the Sac County assessor shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Sac County?
Zoning in Sac County is set by the county for unincorporated land and by each city (such as Sac City, Lake View) inside its own limits. ParcelSheet shows the use code the county assessor lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Sac County?
Under Iowa's county zoning law (Iowa Code Chapter 335), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Sac County ask the zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Sac County?
Yes. A new or changed septic system in Sac County needs a permit from the Sac County environmental health department (county board of health, under Iowa Department of Natural Resources rules). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area IA161 (Sac County, Iowa).
What can I build on 5 acres in Sac County?
Zoning in Sac County is set by the county for unincorporated land and each city inside its own limits (such as Sac City, Lake View). The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the planning office has the district and its rules. See the Sac County website.
What are the residential setbacks in Sac County (2026)?
Setbacks in Sac County come from the zoning code of the county, or of the city when the lot is inside city limits: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the zoning office gives them for the district. See the Sac County website.
Next to Sac County: Buena Vista County, Calhoun County, Carroll County, Crawford County, Ida County.
The Iowa map · All Iowa counties · Flood zones explained · FIRM panels and LOMAs · All 50 states