Building permits, zoning and septic rules in Franklin County, Ohio
34Index Score / 100 #85 of 88 in Ohio
Unincorporated Franklin County, Ohio requires building permits for new homes, many alterations, and accessory structures larger than 200 square feet1. The Franklin County Building Department handles county building permits; zoning approval comes from the county or the applicable township authority23. Septic systems require a separate permit through Franklin County Public Health within its health-district jurisdiction45.
At a glance
Building permit
Required for listed residential work in unincorporated areas1
Zoning
County zoning applies where a separate township resolution does not63
Septic permits
Separate permit through Franklin County Public Health within its jurisdiction45
Well permits
Franklin County Public Health permits private water systems7
RV living
Prohibited outside approved recreational parks or campgrounds under county zoning; separate township rules may apply86
Owner-builder
An owner doing electrical, heating, plumbing, well or septic work on their own project may get a homeowner's permit by signing an affidavit9
Land division
County review covers lot splits and larger subdivisions10
Building code
County directs applicants to the 2019 Residential Code of Ohio11
Administers zoning (Certificate of Zoning Compliance) for 10 of Franklin County's 17 townships; the other 7 townships and several villages zone themselves
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Do you need a building permit in Franklin County, Ohio?
Unincorporated Franklin County, Ohio requires a building permit for new and modular houses, interior alterations, detached garages or pole barns, decks, pools, porches, demolition, and accessory structures larger than 200 square feet1. The county directs applicants to the 2019 Residential Code of Ohio for its building code11. Permits for properties with public water and sewer are issued 7 to 10 days after full plan approval2. For a property with a private well or cistern, Franklin County Public Health reviews the plans before returning them to the Building Department2. Electrical, heating, plumbing, well, and septic work each require separate permits4. An owner who does the electrical, heating, plumbing, well or septic work personally may obtain a homeowner's permit after signing an affidavit to that effect; the separate trade permits are still required.9 Like most counties around it in Ohio, Franklin County requires a county building permit12. In Columbus, the city building official issues building permits; Columbus Public Health handles household sewage treatment systems within its jurisdiction1314.
Who issues building permits in Franklin County, and how do you apply?
The Franklin County Building Department handles covered building work in unincorporated Franklin County12. Reach the office at 142 S. Front St., Columbus, Ohio, 43215, by phone at 614-525-3166, or by email at building@franklincountyohio.gov2. Apply in person or online2. Planning questions go to planning@franklincountyohio.gov at the same phone and street address15. County zoning applications carry an application fee, while building-review and inspection fees follow the locally adopted schedule1617.
Does Franklin County have zoning?
Franklin County zoning applies to unincorporated territory except where a township zoning resolution applies or the county resolution has been repealed63. Brown, Clinton, Franklin, Hamilton, Madison, Mifflin, Norwich, Pleasant, Sharon, and Truro Townships submit zoning-compliance applications to the county Economic Development and Planning Department15. Blendon, Jackson, Jefferson, Perry, Plain, Prairie, and Washington Townships use their own zoning authorities, as do the villages listed on the county building-permit page15. Inside the cities, Reynoldsburg administers zoning through its Planning and Zoning Division18, and Westerville zones its own land19. Septic systems outside Columbus stay with Franklin County Public Health within its health-district jurisdiction5. County-administered districts set permitted uses and development standards, so identify the district before planning a house20. The county Limited Suburban Residential District requires at least 20,000 square feet per dwelling unit and centralized water and sanitary sewer service; that standard is not a countywide minimum for every residential parcel2120.
How do septic permits work in Franklin County?
Franklin County Public Health reviews, inspects, and regulates household sewage treatment systems within its health-district jurisdiction5. Installing, repairing, or replacing a septic system requires a separate permit4. Ohio's process requires a site review that generally includes a soil evaluation and system design before the health board issues an installation or alteration permit; operating the system also requires a valid operation permit22. Franklin County Public Health makes annual observations of aeration systems, evapotranspiration mounds, commercial systems, and household systems installed since 201523. USDA rates 0% of the county's soils as not limited for a conventional drain field, so expect a site evaluation and possibly an engineered system rather than a standard trench24. Franklin County Public Health also permits construction, alteration, and abandonment of private water systems, including wells, cisterns, springs, ponds, and hauled-water tanks7.
Can you live in an RV or tiny home on your land in Franklin County?
In unincorporated Franklin County areas governed by county zoning, recreational vehicles and camping trailers cannot be used for living, sleeping, or housekeeping on residential property outside an approved recreational park or campground86. RV parking and storage are regulated separately; permission to store an RV does not authorize living in it8. Ask the township zoning authority about parcels under separate township zoning15. We could not confirm a tiny-home occupancy rule in the county zoning resolution; ask the county Economic Development and Planning Department or the parcel’s township zoning authority15. New manufactured homes in the county-administered Residential Manufactured Home overlay district must have at least 900 square feet of living area, excluding garages, porches, and attachments, and be at least 14 feet wide at one point25. That district also requires a permanent foundation, appropriate utilities, and frontage on an approved subdivision street, with no lot access to an existing township, county, or state road25. A regulated manufactured home generally cannot be occupied until a state inspector issues the inspection seal26.
What are the steps to build a home in Franklin County?
Identify the parcel’s zoning authority and district, and obtain the applicable zoning-compliance documentation1520.
For private septic or water, begin with Franklin County Public Health; septic and well work require separate permits47.
Submit the building-permit application to the Franklin County Building Department in person or online2.
Allow for plan review: public-water-and-sewer properties receive building permits 7 to 10 days after full plan approval, while private-well or cistern plans first need Franklin County Public Health approval2.
Arrange building inspections as work progresses; Ohio building officials inspect against approved construction documents27. Hot tubs, spas, and swimming pools need electrical bonding inspections; for an inground pool, bonding inspection must precede footing inspection28.
What should you check before buying land in Franklin County?
Confirm the zoning authority and district before making an offer because Franklin County and local jurisdictions divide zoning work320. Check the soil before counting on a conventional septic field: USDA data rates 0% of assessed county soils as free of severe limitations for that use24. If an existing septic system discharges to the county storm-sewer system, Franklin County Public Health works with the owner to connect to an available sanitary sewer or install an approved septic system29. A lot split can create up to 4 new lots smaller than 5 acres, while large-lot development covers 5-to-20-acre lots and a major subdivision begins at 5 new lots or when another category does not fit10. Franklin County's density is about 2,491 people per square mile, and the nearest city of 100,000 or more is about 2 miles from the county center3031. The median annual property-tax bill is about $4,110, with an effective rate near 1.5%3233.
Watch-outs
A homeowner's permit covers only work the owner performs personally, and the separate electrical, heating, plumbing, well and septic permits are still required.9
County district limits do not apply automatically in townships with their own zoning; confirm the parcel’s authority and district before relying on a lot-size or manufactured-home standard620.
USDA rates 0% of Franklin County's soils as not limited for a conventional septic drain field, so make the health-district site review an early contingency2422.
Written October 14, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.
Franklin County highlighted among the Ohio counties · colored by Index score
How Franklin County scores
Seclusion11100% ev.
Self-Sufficiency57100% ev.
Admin Boringness4090% ev.
Durability82100% ev.
Property Autonomy35100% ev.
Carry Cost57100% ev.
Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →
$301kTypical home
1.5%Property tax
$11,462Land / acre
41.1"Annual rain
1.6% of yrsSevere drought
4.6 / yr (+4.5)Mid-century 100°F days
12.5 daysMid-century dry spell
1.68" (+6.5%)Mid-century 1-day rain
1.9×Wildfire change factor
100%Forward climate coverage
$1,263Home insurance / yr
1.1% / yrInsurance growth
1.18%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,678,783People within 30 min
7,862,711People within 2 hr
1,250,684Radius comparison (15 mi)
2,490.6People / sq mi
0.4%Federal land
98.7%Land at 15% slope or less
0%Soils rated "not limited" for septic (strict USDA rating)
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Cities and towns in Franklin County
Inside a city, town or township here, that government usually sets zoning and may issue its own building permits; the county’s rules above cover land outside them.
Not yet researched: Blendon Township · Village of Brice · Brown Township · Canal Winchester · Clinton Township · Dublin · Franklin Township · Hamilton Township · Village of Harrisburg · Jackson Township · Jefferson Township · Village of Lithopolis · Village of Lockbourne · Madison Township · Mifflin Township · Norwich Township · Perry Township · Plain Township · Pleasant Township · Prairie Township · Sharon Township · Truro Township · Village of Urbancrest · Village of Valleyview · Washington Township · Westerville · Whitehall
Answers from the rulebook for Franklin County
What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.
Franklin County rules
Building permitRequired
The listed residential and accessory construction, alteration, moving, and demolition activities in unincorporated Franklin County.
The source lists interior residential alterations; replacement of doors, windows, roofing or siding; new and modular houses; detached garages or pole barns; decks; swimming pools; sun rooms or porches; accessory structures greater than 200 square feet; moving a structure; and demolition.
The FAQ states its answers are general and may not apply to every specific situation.
accessory structure threshold: > 200 sq.ft
“You must obtain a building permit for any of the following activities:”
An owner performing electrical, heating, plumbing, well, or septic work on a project requiring permits in unincorporated Franklin County.
The owner must be performing the work themselves.
The owner must sign an affidavit to obtain a homeowner's permit.
Separate electrical, heating, plumbing, well, and septic permits are required.
Electrical, heating, and plumbing work otherwise requires a contractor licensed with the Franklin County Development Department or the homeowner.
“An owner may obtain a homeowner's permit if performing the work themselves after signing an affidavit to that effect.”
Building code adoptedAdopted
Franklin County building-code administration for the residential projects covered by the county Building Department.
The county FAQ directs applicants to the 2019 Residential Code of Ohio for the Franklin County Building Code.
code: 2019 Residential Code of Ohio
“For Franklin County Building Code, please refer to the 2019 Residential Code of Ohio (RCO).”
InspectionsLimited
Electrical bonding inspections for hot tubs, spas, and swimming pools.
The inspection must occur before a footing inspection for an inground pool installation.
“An Electrical Bonding inspection is required on all hot tub, spa, and swimming pool installations.”
County-wide zoningPresent (with conditions)
Franklin County zoning in unincorporated territory under the Franklin County Zoning Resolution.
The county resolution does not apply where a township zoning resolution applies under Ohio Revised Code Chapter 519.
The resolution includes statutory exemptions, including agriculture, public utilities, and railroads, subject to the resolution and applicable law.
“all land in the unincorporated territory of Franklin County”
Local zoningVaries (with conditions)
Aggregate local zoning within Franklin County, including county-administered zoning for many unincorporated areas and separate township zoning where a township zoning resolution applies.
The county resolution applies in unincorporated territory except areas included in a township zoning resolution or a township where the county resolution has been repealed.
The conclusion aggregates different local authorities and does not mean Franklin County administers every local ordinance.
“from the zoning authority in that jurisdiction.”
Zoning districtsPublished (with conditions)
Zoning districts and district-specific uses and regulations in the unincorporated territory governed by the Franklin County Zoning Resolution.
The resolution divides unincorporated Franklin County into zoning districts with specified allowed uses and uniform regulations within each district.
Township zoning resolutions may govern instead in covered areas.
The 2026 resolution identifies residential, commercial, industrial, planned, special, and other districts and includes district-specific development standards.
“divides the unincorporated territory of Franklin County into zoning districts.”
Minimum dwelling sizeDistrict specific (with conditions)
New single-wide or double-wide manufactured homes in the county-administered Residential Manufactured Home (RMH) overlay district in unincorporated Franklin County.
The RMH district is an overlay that may be placed over the R-1, R-2, R-4, or R-8 districts through the zoning map amendment process.
The home must meet the United States Department of Housing and Urban Development 1974 Manufactured Housing Construction Safety Standards.
The home must front on an approved public or private subdivision street created to service the lots; RMH lots may not have access to an existing township, county, or state road.
The structure must be affixed to a permanent slab, crawl space, or full foundation and connected to appropriate utilities; indicia of mobility must be removed before placement on the permanent foundation.
The structure must have a width of at least fourteen (14) feet at one point.
Total living area excludes garages, porches, and attachments.
The structure must have a six-inch minimum cove overhang with appropriate guttering, an A roof with a minimum roof pitch of 3/12, and conventional siding.
The structure must have been manufactured after January 1, 1995 in accordance with Ohio Revised Code 3781.06(F).
The county zoning resolution applies to unincorporated territory except territory included in a township zoning resolution or a township where the county zoning resolution has been repealed.
minimum total living area: >= 900 square feet (Excludes garages, porches, or attachments) · minimum structure width at one point: >= 14 feet · minimum cove overhang: >= 6 inches (Including appropriate guttering) · minimum roof pitch: >= 3/12 (A roof) · manufacture date: > 1995-01-01 (Must be manufactured after January 1, 1995)
“The provisions of this Zoning Resolution shall apply to all land in the unincorporated territory of Franklin County except as is included in a township zoning resolution adopted in accordance with Chapter 519, Ohio Revised Code, or in a township in which this Zoning Resolution has been repealed in accordance with Section 303.25, Ohio Revised Code. [...] The RMH district is an overlay district, which may be placed over the R-1, R-2, R-4, or R-8 districts as approved by the zoning map amendment process. [...] 319.021 - New single wide or double wide manufactured homes which meet the United States Department of Housing and Urban Development 1974 Manufactured (mobile home) Housing Construction Safety Standards (1974 HUD Code). [...] c.) The structure has a width of at least fourteen (14) feet at one point, and a total living area, excluding garages, porches, or attachments of at least nine hundred (900) square feet.”
Minimum lot sizeDistrict specific (with conditions)
Lot area for each dwelling unit in the Limited Suburban Residential District under the Franklin County zoning resolution.
Centralized water and sanitary sewer service is required.
For other permitted and conditional uses, lot area must meet county board of health sanitation requirements and cannot be less than the amount prescribed for the use.
The county zoning page states that Blendon, Jackson, Jefferson, Perry, Plain, Prairie, and Washington Townships administer their own zoning regulations.
minimum lot area per dwelling unit: >= 20000 square feet (Centralized water and sanitary sewer service is required.)
“twenty thousand (20,000) square feet per dwelling unit”
Living in an RVProhibited
Use of recreational vehicles, camping trailers, and similar recreational vehicles or equipment as a dwelling unit or for living, sleeping, or housekeeping purposes on residential property in unincorporated Franklin County.
The prohibition applies outside an approved recreational park or campground area.
The zoning resolution separately regulates parking and storage of recreational vehicles by parcel acreage, number of vehicles, location, and property-line setbacks.
The county zoning page states that Blendon, Jackson, Jefferson, Perry, Plain, Prairie, and Washington Townships administer their own zoning regulations.
“The following townships administer their own zoning regulations and should be contacted for properties located in their respective township: Blendon, Jackson, Jefferson, Perry, Plain, Prairie, and Washington Townships.”
Who permits septicCounty
Private water and sewage systems administered by Franklin County Public Health within its health-district jurisdiction.
Franklin County Public Health enforcement authority is also governed by Ohio Revised Code and Ohio Administrative Code.
“We also review, inspect and regulate sewage systems.”
Septic permitRequired
Installation, repair, or replacement of a Household Sewage Treatment System in Franklin County.
The source directs applicants to the Franklin County Public Health forms and permits page for HSTS work.
“Yes, electrical, heating, plumbing, well, and septic all require separate permits.”
Septic inspectionLimited
Annual observations and other inspections of specified sewage treatment systems.
Annual observations cover aeration systems, evapotranspiration mounds, commercial septic systems, and HSTSs installed since 2015.
Staff also conduct real-estate inspections for private wells and septic systems and investigate failing HSTSs.
annual observation start year for HSTS: >= 2015 year
“We make annual observations of aeration systems, evapotranspiration mounds, commercial septic systems and HSTSs installed since 2015.”
Well permitRequired
Construction, alteration, or abandonment of a private water system, including wells.
Private water systems include water wells, cisterns, springs, ponds, and hauled-water storage tanks.
“We review and approve permits for the construction, alteration and abandonment of private water systems.”
Mandatory utility hookupConditional
A septic system that discharges to the County's MS4.
Franklin County Public Health will work with the property owner either to connect to an available and accessible sanitary sewer or to install an approved septic system.
“If your septic system discharges to the MS4, we will work with you to either connect to an available and accessible sanitary sewer or install an approved septic system.”
Subdividing landRegulated (with conditions)
Creation of lots of record through lot splits, large-lot development, or major subdivision in the county's land-division jurisdiction.
A lot split creates up to four new lots and each lot must be less than five acres.
Large-lot development divides land into five-to-twenty-acre lots; each lot must be along an existing street and require no common easements.
A major subdivision creates five or more new lots or does not meet the criteria for the other categories and requires detailed review.
lot split maximum new lots: <= 4 lots · lot split lot size: < 5 acres · large lot development range: 5-20 acres · major subdivision threshold: >= 5 new lots
“When a property owner wishes to create a lot of record, he or she must formally apply for a land division with the Franklin County Economic Development & Planning Department.”
Permit feesPublished
County land-division and zoning application fees for the applicable county-administered jurisdiction.
The subdivision page links a fee schedule.
The zoning FAQ states that each zoning-compliance application has an application fee.
“There is an application fee required for each application.”
Ohio rules that apply here
SetbacksDistrict specific (with conditions)
Township zoning regulation of setback building lines for agricultural buildings or structures on lots greater than one acre but not greater than five acres in qualifying platted subdivisions or qualifying areas of fifteen or more contiguous lots.
The local regulation must arise under a township zoning resolution or amendment.
The subdivision or area must meet the statutory qualification in section 519.21(B).
The statute does not provide a statewide numeric setback distance.
Township zoning may not regulate agriculture, agricultural buildings or structures, or dairying and animal and poultry husbandry on lots greater than five acres under division (B).
lot size lower threshold: > 1 acre · lot size upper threshold: <= 5 acres
“not greater than five acres by: set back building lines;”
Building heightDistrict specific (with conditions)
Township zoning regulation of height for agricultural buildings or structures on lots greater than one acre but not greater than five acres in qualifying platted subdivisions or qualifying areas of fifteen or more contiguous lots.
The local regulation must arise under a township zoning resolution or amendment.
The subdivision or area must meet the statutory qualification in section 519.21(B).
The statute does not provide a statewide numeric height limit.
Township zoning may not regulate agriculture, agricultural buildings or structures, or dairying and animal and poultry husbandry on lots greater than five acres under division (B).
lot size lower threshold: > 1 acre · lot size upper threshold: <= 5 acres
“Buildings or structures incident to the use of land for agricultural purposes [...] height;”
Manufactured homesLimited
Occupancy of manufactured homes installed in Ohio and regulated under Chapter 4781 of the Revised Code and implementing rules.
A manufactured home generally may not be occupied until the inspector issues the inspection seal.
The inspection seal must be paid for when the permit is issued.
A temporary occupancy permit may provide the applicable exception under Rule 4781-7-01(C).
The home must meet Ohio manufactured-home installation standards; local ordinances and other regulations may also apply to site placement.
“Except as provided in paragraph (C) of this rule, no manufactured home shall be occupied until the inspector has issued the inspection seal.”
Agricultural exemptionConditional
Buildings or structures incident to agricultural use of the land, and a specific building or structure declared by a county or township zoning inspector to be used in agriculture.
The exemption in section 3781.06 applies to buildings or structures incident to agricultural use of the land.
The buildings or structures must not be used in the business of retail trade.
A building or structure is not considered used in the business of retail trade if fifty per cent or more of gross income from sales of products in the building or structure comes from products produced or raised in a normal crop year on farms owned or operated by the seller.
Under section 3781.061, a county zoning inspector under section 303.16 or township zoning inspector under section 519.16 must issue a zoning certificate declaring the specific building or structure is to be used in agriculture for the additional exemption described there.
The cited section 3781.06 is effective January 1, 2025; section 3781.061 is effective October 17, 2019.
retail-sales agricultural-product threshold: >= 50 percent of gross income (Products must be produced or raised in a normal crop year on farms owned or operated by the seller.)
“issues a zoning certificate that declares a specific building or structure is to be used in agriculture, such building is not subject to sections”
2 more reviewed findings on this topic
Available (with conditions) — Qualifying parcel divisions processed under rules adopted pursuant to Ohio Revised Code section 711.133.
“Rules adopted under this section shall exempt from the approval requirements of this section parcels of land to be used only for agricultural”
Available (with conditions) — Buildings or structures incident to agricultural use of the land in Ohio.
“incident to the use for agricultural purposes [...] provided those buildings or structures are not used in the business of retail trade.”
Building in a floodplainRequired
Development in a recreational vehicle park, recreation camp, combined park-camp, or temporary park-camp located within a one-hundred-year flood plain.
In a municipal corporation, the permit is obtained from the municipal corporation under its floodplain-management ordinance.
In an unincorporated area, the permit is obtained from the board of county commissioners under the county floodplain-management resolution adopted under Revised Code section 307.37.
When development occurs on a site where a recreational vehicle or portable camping unit is or will be located, the owner and operator must jointly obtain the permit, except that for a temporary park-camp the temporary park-camp owner must obtain it.
Municipal and county permit fees are not regulated by the director of health.
statutory effective date: 2012-09-10
“No person shall cause development to occur within any portion of a recreational vehicle park, recreation camp, combined park-camp, or temporary park-camp that is located within a one-hundred-year flood plain in an unincorporated area unless the person first obtains a permit therefor from the board of county commissioners of the county in which the development is to occur in accordance with the flood plain management resolution of the county adopted under section 307.37 of the Revised Code.”
Permit processPublished (with conditions)
Construction, erection, alteration, or equipment of buildings subject to Ohio Revised Code section 3781.06.
Before beginning construction, the owner must submit plans, drawings, specifications, and data to the municipal, township, or county building department having jurisdiction, subject to the statutory exceptions where no certified department has jurisdiction.
No owner may proceed until the plans and specifications are approved or the industrialized unit is inspected at the point of origin.
Plans must comply with Chapters 3781 and 3791 and applicable rules.
Approval becomes invalid if work has not commenced within twelve months; one additional twelve-month extension may be granted if requested at least ten days before expiration and accompanied by a fee not exceeding $100.
If work is delayed or suspended for more than six months, approval becomes invalid; two six-month extensions may be granted, each with a fee not exceeding $100.
A certified building department or the superintendent must review submitted plans.
Conditional approval may allow construction only up to the point of an unresolved objection.
initial approval deadline: <= 30 days (Failure to approve or disapprove within thirty days is treated as an adjudication order denying issuance of a license.) · commencement period after approval: 12 months (One extension of twelve months is available under the stated conditions.)
“No owner shall proceed with the construction, erection, alteration, or equipment of any building until the plans or drawings, specifications, and data have been approved as this section requires, or the industrialized unit inspected at the point of origin.”
Campground & park staysLimited
Roadside camping at designated Ohio state forests along public roads maintained by the division of forestry.
Permitted only at designated state forests, along public roads maintained by the division of forestry, during certain legally established hunting seasons.
The chief of the division of forestry must authorize the applicable season.
Only self-contained camping units meeting Rule 1501:3-3-04 are permitted unless restroom facilities are available.
Vehicles must be parked sufficiently far off the roadway not to present a hazard and may not block roads, trails, or gated access areas.
Other restrictions in Rule 1501:3-3-06 apply.
“Roadside camping is permitted at designated state forests, along public roads maintained by the division of forestry, during certain legally established hunting seasons as authorized by the chief of the division of forestry.”
2 more reviewed findings on this topic
Limited — Occupancy and placement of recreational vehicles in Ohio-licensed campgrounds and temporary campgrounds.
“Recreational vehicles or portable camping units shall be parked only on sites that have been verified as complying with plans approved by the director, or in the case of a temporary campground, by the licensor;”
Prohibited — Camping in Ohio state forests outside areas, sites, or campgrounds designated by the chief of the division of forestry or an authorized agent.
“No person shall camp in a state forest except in areas, sites or campgrounds designated by the chief of the division of forestry or authorized agent.”
county zoning authorityGeneral
County commissioners may adopt zoning resolutions regulating building, structures, land uses, and districts or zones in unincorporated territory statewide.
The authority is exercised by resolution and must be in accordance with a comprehensive plan.
The authority applies to unincorporated territory of the county.
The statute begins with the exception phrase “Except as otherwise provided in this section,” so the limitations in ORC Chapter 303 apply.
For nonresidential property only, the county may regulate height, bulk, number of stories, size, lot coverage, yards, courts, open spaces, and population density.
Agricultural uses and agricultural buildings are subject to the limitations in ORC 303.21; the statute also contains limitations for public utilities, railroads, telecommunications towers, alcoholic-beverage sales, oil and gas drilling, and permanently sited manufactured homes.
Activities regulated under ORC Chapters 1513 and 1514 may be regulated only in the interest of public health or safety, and Chapter 1514 activities must be provided for as permitted or conditional uses as specified by ORC 303.02.
“the board of county commissioners may regulate by resolution, in accordance with a comprehensive plan”
county building authorityGeneral
County commissioners may adopt and enforce local residential building regulations in unincorporated areas and may operate certified county building departments that enforce state residential and nonresidential building codes, accept and approve plans, and conduct inspections.
Local residential building regulations may be enforced within the unincorporated area or within districts established in the unincorporated area.
A local residential building regulation may not differ from the state residential building code unless it addresses subject matter not addressed by that code or is adopted under ORC 3781.01.
An existing structures code must concern subject matter not addressed by, and may not conflict with, the state residential building code.
County building departments may enforce state codes only for the types of buildings and subject matters for which they are certified.
Certification permits enforcement authority, plan approval, and inspections; the certification application identifies whether it covers residential or nonresidential buildings and whether residential certification covers new construction only or also repair and alteration.
The board may adopt flood-hazard, Lake Erie coastal-erosion, and drainage regulations, subject to the statutory limits and exceptions in ORC 307.37.
Local regulations, codes, or amendments require public hearings at not fewer than two regular or special board sessions; they take effect on the thirty-first day after adoption.
Regulations adopted under ORC 307.37 generally do not affect buildings or structures existing, or under construction, before adoption, except as provided for an existing structures code.
The state residential building code is effective as a uniform requirement in areas with a building department certified to enforce it.
“The board of county commissioners may adopt local residential building regulations governing residential buildings as defined in section 3781.06 of the Revised Code”
One more reviewed finding on this topic
General — Ohio boards of county commissioners adopting and enforcing local residential building regulations in unincorporated county areas, including districts established within those areas, and administering state building codes when certified.
“The board of county commissioners may adopt local residential building regulations governing residential buildings”
Set by your township or city, not the county
In Ohio, zoning is adopted by each township or city, so Franklin County has no county-wide answer on these. Find your township or city in the list of places on this page, or call its clerk or zoning administrator.
Lot coverage
Camping on your land
Tiny homes
Accessory dwellings
Short-term rentals
Still unanswered
We looked and could not find an official answer yet. Silence is not permission — ask the county directly.
Certificate of occupancy — Certificate-of-occupancy requirements in Franklin County.
Off-grid sanitation — Off-grid sanitation systems in Franklin County.
Driveway access — Driveway access requirements in Franklin County.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Living off-grid in Franklin County, Ohio
Is Franklin County a good place to live off-grid or homestead?
Franklin County scores 34/100 on the Bolthole Index, a marginal county profile. Its strengths: mixed durability signals. Watch-outs: little seclusion — roughly 1,678,783 people within a 30-minute drive and a weaker property-autonomy legal backdrop.
Do you need a building permit in Franklin County, Ohio?
Franklin County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Franklin County Public Health. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.
Can you live in an RV or tiny home on your land in Franklin County?
Living in an RV on your own land in Franklin County is prohibited: Use of recreational vehicles, camping trailers, and similar recreational vehicles or equipment as a dwelling unit or for living, sleeping, or housekeeping purposes on residential property in unincorporated Franklin County. The prohibition applies outside an approved recreational park or campground area. The zoning resolution separately regulates parking and storage of recreational vehicles by parcel acreage, number of vehicles, location, and property-line setbacks. Confirm with the county before relying on it.
How much does land cost in Franklin County, Ohio?
Land in Franklin County runs about $11,462 per acre, based on the latest county data.
What is the water situation in Franklin County?
Franklin County gets about 41.1" of rain a year, with severe drought in roughly 1.6% of years.
How remote is Franklin County?
A representative private-land location has about 1,678,783 people within a 30-minute drive and 7,862,711 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.
