Black Hawk County, IA zoning map, flood zone and property lines by address
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Towns in Black Hawk County: Waterloo, Cedar Falls, Evansdale.
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 Black Hawk County has 117 FIRM panels, the newest effective May 2024; 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 Black Hawk 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 Black Hawk lot shows the same lines the county assessor draws. Black Hawk County covers about 362,095 acres of land and 4,420 acres of water.
Mapped lines are approximate. The Black Hawk County assessor keeps the parcel record (Black Hawk County website); a licensed surveyor sets the true corners.
Zoning
Black Hawk County zones its unincorporated land, and Waterloo, Cedar Falls, Evansdale 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 Black Hawk 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. Black Hawk County is soil survey area IA013, Black Hawk County, Iowa, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Black Hawk County needs a permit from the Black Hawk County environmental health department (county board of health, under Iowa Department of Natural Resources rules).
Setbacks
Setbacks in Black Hawk 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 Waterloo, Cedar Falls, Evansdale for land inside their limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Black Hawk lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Black Hawk 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 Black Hawk County has 117 panels, the newest effective May 2024. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Black Hawk County?
Open the Iowa map, type the address, and the parcel outline from the Black Hawk 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 Black Hawk County?
Zoning in Black Hawk County is set by the county for unincorporated land and by each city (such as Waterloo, Cedar Falls) 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 Black Hawk 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 Black Hawk 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 Black Hawk County?
Yes. A new or changed septic system in Black Hawk County needs a permit from the Black Hawk 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 IA013 (Black Hawk County, Iowa).
What can I build on 5 acres in Black Hawk County?
Zoning in Black Hawk County is set by the county for unincorporated land and each city inside its own limits (such as Waterloo, Cedar Falls). 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 Black Hawk County website.
What are the residential setbacks in Black Hawk County (2026)?
Setbacks in Black Hawk 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 Black Hawk County website.
Next to Black Hawk County: Bremer County, Buchanan County, Butler County, Grundy County, Tama County.
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