Sherman County, OR zoning map, flood zone and property lines by address
Free, no account. Or open the Oregon map and tap a lot.
Towns in Sherman County: Moro.
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 Sherman County has 67 FIRM panels, the newest effective July 2025; 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 Sherman 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 Oregon county parcel layers (each county publishes its own), so a Sherman lot shows the same lines the county assessor draws. Sherman County covers about 527,113 acres of land and 4,848 acres of water.
Mapped lines are approximate. The Sherman County assessor keeps the parcel record (Sherman County website); a licensed surveyor sets the true corners.
Zoning
Sherman County zones its unincorporated land, and Moro zones the land inside its limits. ParcelSheet shows the use the county assessor lists for the lot and links the county planning department for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Oregon's county land use planning law (Oregon Revised Statutes Chapter 215), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Sherman lot can add one depends on its district; the county planning department 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. Sherman County is soil survey area OR055, Sherman County, Oregon, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Sherman County needs a permit from the Sherman County onsite septic program office (run by the county or by Oregon DEQ, under DEQ onsite rules).
Setbacks
Setbacks in Sherman 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 Moro for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Sherman lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Sherman 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 Sherman County has 67 panels, the newest effective July 2025. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Sherman County?
Open the Oregon map, type the address, and the parcel outline from the Sherman 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 Sherman County?
Zoning in Sherman County is set by the county for unincorporated land and by each city (such as Moro) 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 Sherman County?
Under Oregon's county land use planning law (Oregon Revised Statutes Chapter 215), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Sherman 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 Sherman County?
Yes. A new or changed septic system in Sherman County needs a permit from the Sherman County onsite septic program office (run by the county or by Oregon DEQ, under DEQ onsite rules). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area OR055 (Sherman County, Oregon).
What can I build on 5 acres in Sherman County?
Zoning in Sherman County is set by the county for unincorporated land and each city inside its own limits (such as Moro). 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 Sherman County website.
What are the residential setbacks in Sherman County (2026)?
Setbacks in Sherman 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 Sherman County website.
Next to Sherman County: Gilliam County, Wasco County.
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