Kingsville

Ashtabula County has NOT adopted a countywide zoning resolution under O.R.C. Chapter 303. Zoning in Ashtabula County is administered at the township and municipal level, not the county level. The county's published 2025 Ashtabula County Zoning Contacts roster (issued by the Ashtabula County Building Department, document /DocumentCenter/View/1746) explicitly lists each city, village, and township that has a zoning inspector or administrator. Of the county's 27 civil townships, 3 explicitly carry 'Not Applicable' next to their entry on that roster (Monroe Township, Richmond Township, Windsor Township) — meaning those townships have not adopted township zoning under O.R.C. Chapter 519 and are unzoned, leaving the Ohio Residential Code and the county Subdivision Regulations as the only land-use rules in force. The other 24 townships, plus the three cities (Ashtabula, Conneaut, Geneva) and the eight villages (Andover, Geneva-on-the-Lake, Jefferson, North Kingsville, Orwell, Roaming Shores, Rock Creek, and the village of Andover) each administer their own zoning. The Ashtabula County Planning and Development Department reviews township-zoning text and map amendments before they go to the County Planning Commission for advisory action, but the township trustees, not the county, adopt and enforce the rule. There is therefore no county-side ADU ordinance to cite — accessory-dwelling permissibility is decided at the township or municipal level, and on parcels in the three unzoned townships there is no zoning gate at all (a residential building permit through the Ashtabula County Building Department is the only land-use approval needed for a dwelling unit conforming to the Ohio Residential Code).

• O.R.C. Chapter 303 — County rural zoning (not adopted by Ashtabula County)
• O.R.C. Chapter 519 — Township zoning
• Ashtabula County Subdivision Regulations (Ashtabula County Planning and Development)
• Ashtabula County Zoning Contacts roster (2025) — document /DocumentCenter/View/1746

State-floor overlay: Ohio has no statewide ADU preemption (see state-level research). On unzoned Ashtabula County parcels (the three townships above), the only state-level standards are the Ohio Residential Code (OAC 4101:8 for one- and two-family dwellings) governing construction and the Ohio Plumbing Code where applicable. There is no state-imposed floor on ADU permissibility, parking, owner-occupancy, or size.

Ashtabula County's overlay-style constraints that meaningfully affect ADU siting are: (1) Lake Erie shoreline regulation — Ashtabula County has a long Lake Erie shoreline running from the Lake County line at Geneva-on-the-Lake through Saybrook Township, Ashtabula City, Kingsville Township, North Kingsville, and Conneaut City. Lake Erie shoreline construction is subject to the Ohio Department of Natural Resources Office of Coastal Management coastal-erosion-area program (O.R.C. Chapter 1506) and the FEMA NFIP Coastal A-Zone and V-Zone provisions where mapped; the county does not itself administer a coastal overlay but coordinates with ODNR Coastal Management for setback and erosion-area determinations on shoreline parcels. (2) FEMA NFIP Special Flood Hazard Areas along the Grand River, Ashtabula River, Conneaut Creek, Pymatuning Creek, and their tributaries — Ashtabula County participates in the NFIP and administers a county floodplain ordinance for unincorporated parcels through the Planning and Development Department; municipalities administer their own floodplain ordinances within city/village limits. (3) Pymatuning State Park / Pymatuning Reservoir — a major Ohio-Pennsylvania interstate reservoir on the county's eastern boundary; shoreline parcels and parcels in the reservoir's drainage face additional regulatory layers including Pymatuning Lake Association rules and the Pymatuning Lake Authority for properties leased from or adjacent to the reservoir. (4) Wine country / agricultural overlays — much of Ashtabula County is within the Grand River Valley AVA (federal viticultural area) and the lake-effect grape belt; while AVA designation does not by itself create local land-use restriction, parcels enrolled in CAUV face the recoupment described above on conversion. (5) Historic resources — the county includes a number of properties on the National Register of Historic Places, including covered bridges (Ashtabula County is known as 'The Covered Bridge Capital of Ohio' with 19 historic and modern covered bridges), the Hubbard House Underground Railroad Museum in Ashtabula, and numerous individual properties; local historic-preservation review is handled at the municipal level rather than countywide.

• FEMA NFIP Special Flood Hazard Areas — Ashtabula County Floodplain Ordinance — An ADU built inside an SFHA must meet 44 CFR 60.3 standards: lowest-floor elevation at or above Base Flood Elevation (BFE), flood vents, anchoring, and post-construction Elevation Certificate filing. Coastal V-zone parcels require breakaway walls or pile foundations. ADU cost impact in SFHA siting is typically material.
• Lake Erie Coastal Erosion Area / Ohio Coastal Management — An ADU proposed on a Lake Erie bluff or beach-front parcel should be evaluated against ODNR's CEA determination before design. ODNR may require pile foundations, erosion-control structures, or denial in extreme cases.
• Pymatuning Reservoir / Pymatuning Lake authority area — A residential ADU on a Pymatuning shoreline parcel may require additional review from the Lake Authority and ODNR Division of Parks and Watercraft in addition to county building-permit and township-zoning approvals.
• Grand River Valley AVA and lake-effect grape belt (CAUV interaction) — CAUV recoupment is a material project cost on an ADU built on previously enrolled agricultural land. Owners should run the recoupment calculation with the County Auditor's CAUV staff before committing to siting an ADU on CAUV acreage rather than on a separate non-CAUV residential parcel.
• Historic resources (covered bridges, NRHP listings, Underground Railroad sites) — Historic-listed status alone does not prevent an ADU but may impose design-review at the municipal level. Check with the local zoning office on the 2025 Zoning Contacts roster for any historic-overlay review specific to a parcel's jurisdiction.

The Ashtabula County Building Department, located at the county complex in Jefferson, OH and certified by the Ohio Board of Building Standards, enforces the Ohio Residential Code (OAC 4101:8) and Ohio Building Code for residential and commercial construction throughout Ashtabula County, with one notable exception: residential plumbing in the City of Conneaut is handled by Conneaut City Plumbing (440-593-7406), not the county. The department uses the CitizenServe customer portal (citizenserve.com/ashtabula) for permit applications, contractor registration, document uploads, payments, and inspection scheduling. The stated permitting workflow for an ADU is sequenced and explicit on the department's published 'Requirements to Obtain a Permit' page: (1) before applying, the parcel must have a formal address issued and the correct parcel number identified from the tax bill; (2) Zoning approval must be obtained from the local township, village, or city zoning office that has jurisdiction over the parcel — the county will not issue a building permit without proof of zoning approval from the local authority, and on parcels in the three unzoned townships (Monroe, Richmond, Windsor) this step is skipped because no zoning office exists; (3) Septic approval from the Ashtabula County Health Department (440-576-6010 x3) is required because adding additional living space or constructing a new dwelling unit triggers septic-capacity review (most Ashtabula County rural parcels are on private well and septic, not public utilities); (4) the application is then submitted via the CitizenServe portal with one paper copy of plans for residential projects plus a PDF upload; (5) plan review can take up to 30 days; (6) before permit issuance, contractors must be named and registered with the department, all required approvals (zoning, plumbing, septic) must be received, and outstanding fees paid.