Crawford County

ADU Pass helps homeowners in Crawford County, Ohio navigate the permit paperwork for building an accessory dwelling unit. We cover 8 cities and 9 ZIP codes in this county.

9 ZIP codes
8 Cities

County ADU details

County permitting (unincorporated parcels)

Permit responsibility in unincorporated Crawford County is split across multiple authorities, and Crawford County does NOT operate its own residential building department. (1) Township zoning permits, where required, are issued by the zoning inspector of the township the parcel sits in - applicants must contact that specific inspector directly using the Crawford County Engineer's public inspector list. (2) Ohio Building Code residential permits for single-family and accessory residential structures in unincorporated areas are not handled by a Crawford County building department; smaller jurisdictions in Ohio that do not maintain a certified residential building department default to direct application of the Residential Code of Ohio with field oversight typically coordinated through the township and the Ohio Department of Commerce Division of Industrial Compliance. Commercial construction in unincorporated Crawford County (and in every municipality except the City of Galion) is handled under contract by the Richland County Building Department in Mansfield - inspections are run on Tuesdays and Thursdays. (3) Floodplain development permits are administered locally; updated countywide floodplain ordinances were adopted in 2012 by Crawford County jurisdictions, with FEMA FIRMs revised concurrently. (4) Septic / on-site sewage approval for unincorporated parcels routes through the Crawford County Public Health Department. (5) Property-improvement notification to the County Auditor is mandatory above $2,000 - either automatically (in jurisdictions on the auto-notification list: Bucyrus, Galion, Jackson Township, Jefferson Township, Polk Township, Crestline, New Washington, North Robinson, Chatfield) or via a $5 County Auditor Notification Permit filed within 60 days of breaking ground in any other jurisdiction. Failure to notify can trigger a 50% tax penalty.

DepartmentCrawford County Engineer (zoning-inspector roster) / Richland County Building Department (commercial only, except City of Galion) / Crawford County Auditor (notification permit) / Township zoning inspector (residential zoning permit)

Process overview: Typical Crawford County unincorporated ADU workflow: (1) Identify the township the parcel sits in (one of Auburn, Bucyrus, Chatfield, Cranberry, Dallas, Holmes, Jackson, Jefferson, Liberty, Lykens, Polk, Sandusky, Texas, Tod, Vernon, Whetstone) and contact the zoning inspector listed on the Crawford County Engineer's printable inspector roster to confirm whether the township has adopted zoning and, if so, whether ADUs / accessory residential structures are permitted, conditional, or prohibited in the parcel's district. Note that many Crawford County township resolutions do not explicitly enumerate ADUs as an allowed accessory residential use; in those cases a variance or conditional-use approval from the township Board of Zoning Appeals is the typical path. (2) If the parcel is in a jurisdiction on the Auditor's auto-notification list (Bucyrus, Galion, Jackson Township, Jefferson Township, Polk Township, Crestline, New Washington, North Robinson, Chatfield), the building-permit issuing authority will notify the Auditor automatically; otherwise the owner must obtain a $5 County Auditor Notification Permit within 60 days of starting work. (3) Apply for septic / on-site sewage approval through Crawford County Public Health if the parcel is not on public sewer. (4) Apply for a floodplain development permit through the parcel's local floodplain administrator if the parcel is in a FEMA Special Flood Hazard Area. (5) For commercial / mixed-use construction, file commercial plans with the Richland County Building Department (except inside the City of Galion). (6) Construct under the Residential Code of Ohio with applicable inspections, then complete the Auditor notification trail so the new improvement is correctly added to the parcel record.

Impact fees: Crawford County itself does not levy a county impact fee on residential construction. Documented county-side fees on an unincorporated ADU project are limited to the $5 County Auditor Notification Permit (when applicable), township zoning permit fees (set by each township and typically a flat-rate residential fee in the $50-$250 range; confirm with the township inspector), Crawford County Public Health septic application fees, and Richland County Building Department commercial fees if the project is commercial. The City of Galion is the only Crawford County jurisdiction with its own residential building department issuing residential building permits; Galion residential applicants pay city permit fees through 115 Harding Way East rather than any county fee.

County assessor

The Crawford County Auditor is the elected county official responsible for valuing all real property in Crawford County for property-tax purposes, including new ADU improvements added to a host parcel. Crawford County follows the Ohio Department of Taxation's mandated valuation cycle: a sexennial (six-year) full reappraisal and a triennial (three-year) update between reappraisals. The most recent sexennial reappraisal was completed in fall 2024 using 2021-2023 sales data, and the resulting values flowed into the 2025 tax bills mailed in January 2025; the prior triennial update was in 2021. The Auditor picks up new ADU value either through an automatic permit feed from the City of Bucyrus, City of Galion, Jackson Township, Jefferson Township, Polk Township, and the villages of Crestline, New Washington, North Robinson, and Chatfield, or via the owner-filed $5 Auditor Notification Permit (required within 60 days of breaking ground) in every other Crawford County jurisdiction. Improvements over $2,000 that are not reported can attract a 50% tax penalty under Ohio law. Ohio's owner-occupancy 2.5% reduction and the Homestead Exemption apply to the principal residence on the parcel but do not exempt the value added by a new ADU. Valuation disputes go to the Crawford County Board of Revision under ORC Chapter 5715.

NameCrawford County Auditor
Address112 E. Mansfield St., Suite 105, Bucyrus, OH 44820

Assessment policy: Sexennial full reappraisal and triennial update cycle mandated statewide by the Ohio Department of Taxation. Crawford County's most recent sexennial reappraisal was completed in fall 2024 (2021-2023 sales data) and is reflected in 2025 tax bills. Real estate tax is ad valorem: the tax rate is applied to 35% of fair market value. Construction or improvement valued above $2,000 must be reported to the Auditor: automatically (auto-notification jurisdictions: Bucyrus, Galion, Jackson Township, Jefferson Township, Polk Township, Crestline, New Washington, North Robinson, Chatfield) or via a $5 County Auditor Notification Permit filed within 60 days. Failure to notify can trigger a 50% penalty. Owner-occupancy 2.5% reduction and Homestead Exemption attach to the principal residence and reduce tax owed on that portion but do not exempt added ADU improvement value. Valuation challenges go to the Crawford County Board of Revision under ORC Chapter 5715.

County overlays (3)

Crawford County's primary cross-county overlay is FEMA NFIP floodplain regulation, governed by floodplain ordinances refreshed countywide on 2012-08-16 alongside revised Flood Insurance Rate Maps. There is no countywide coastal overlay (Crawford is inland; headwaters of the Sandusky River drain north toward Lake Erie), no wildland-urban-interface fire overlay, and no countywide historic-preservation overlay - the cities of Bucyrus and Galion maintain their own historic-district designations but those are municipal, not county. The county's other operationally significant cross-jurisdiction characteristics are the dual residential / commercial permit split (residential by township and/or Ohio Department of Commerce; commercial by Richland County Building Department except in Galion) and the Auditor auto-notification list described in unincorporatedPermitting, which materially changes paperwork burden depending on which jurisdiction the parcel sits in. Both are overlays in the practical sense even though neither is a zoning overlay per se.

Known county issues (5)

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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.

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.

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.

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.