Springfield

ADU Pass helps homeowners in Springfield, Clark County, Ohio navigate the permit paperwork for building an accessory dwelling unit. This area covers 6 ZIP codes.

6 ZIP codes

ADU details

ADU legality: with-restrictions

Statewith-restrictions (Ohio Revised Code Title 7 Chapter 713 (municipal zoning enabling); ORC Chapter 3781 (Ohio Building Code via OBBS)) — Ohio has no statewide ADU preemption statute. ORC 713 delegates zoning authority to municipalities; Article XVIII of the Ohio Constitution gives chartered cities home-rule power over local affairs. Buildings must comply with the Ohio Residential Code (OBBS-adopted IRC 2018 with state amendments).
Countywith-restrictions (Clark County Combined Health District; Clark County Zoning (unincorporated only)) — Clark County zoning controls only unincorporated parcels and townships that have not adopted independent zoning. Inside Springfield city limits, Clark County zoning does not apply; the city's Part Eleven Zoning Code plus the Ohio Residential Code (state OBBS) govern. County Health District handles septic/well permits if outside Springfield's sewer/water envelope.
Citywith-restrictions (City of Springfield Codified Ordinances Part Eleven (2025 Zoning Code) - Chapter 1107 Accessory Uses & Features Standards; Section 1107.05 Accessory Feature-Specific Regulations) — Springfield adopted a fully rewritten Part Eleven Zoning Code by Ordinance 25-121 on 2025-05-06 - the first comprehensive update since 2001. Chapter 1107 establishes accessory feature standards covering accessory structures and accessory dwellings. ADU-style secondary units are reviewed by the Planning & Zoning Division (Vaidehe Agwan, City Planner) with building permit through the Building Regulations division (Michael Reffitt, CBO). All applications submitted via the CityWorks online portal; paper intake discontinued.

Springfield is a chartered home-rule city and the county seat of Clark County. ADU permitting is governed by the May-2025 rewritten zoning code; review is administrative if the unit fits Chapter 1107 standards, with Planning Commission referral for variances. Wittenberg University-area parcels and the National Trail/Old Reid Park historic-tagged corridors require additional design review.

Cost scenarios

ScenarioSq ft PermitBuildTotal
minimum 300 $1,650 $63,000 $64,650
600 600 $1,850 $132,000 $133,850
midpoint 700 $1,950 $161,000 $162,950
maximum 900 $2,150 $220,500 $222,650
Fee breakdown (as of 2026-04)
Plan review$540
Building permit$990
Total$1,850

Permitting process

Typical duration49 days
Backlog10 days
  1. Pre-application zoning consult with Planning Division (~5d)
    Email Vaidehe Agwan (vagwan@springfieldohio.gov) or Isabel Travis (itravis@springfieldohio.gov) at 76 E. High St 2nd floor; Planning will pull the parcel on the Clark County GIS viewer (https://clarkcounty.maps.arcgis.com) and confirm Chapter 1107 lot-coverage and accessory-feature compliance.
  2. Register and submit on the CityWorks online portal (~1d)
    Submit zoning application and building permit application through https://app05.cityworksonline.com/CLIENT_SpringfieldOH-Public/login - paper intake is no longer accepted. Upload site plan, floor plan, elevations, energy compliance worksheet (REScheck for IECC 2018), and contractor's Ohio license info.
  3. Zoning certificate review (Planning) (~14d)
    Planning issues zoning certificate for compliant Chapter 1107 accessory-feature applications administratively; non-conforming applications referred to Springfield Planning Commission or Board of Zoning Appeals.
  4. Building plan review (Building Regulations division) (~21d)
    Michael Reffitt (Chief Building Official) and inspectors Mike Trabert / Matthew Laird review against the OBBS-adopted Ohio Residential Code (IRC 2018 with state amendments). Plan-check cycle typical for residential.
  5. Fee invoice and permit issuance (~3d)
    CityWorks invoices fees once both tracks clear; payment online; permit emailed.
  6. Construction inspections via CityWorks
    Foundation, framing, plumbing/electrical/mechanical rough, insulation, drywall, final - inspections requested through CityWorks; called in to (937) 324-7389.
  7. Certificate of occupancy (~5d)
    CO issued after final inspection pass; ADU eligible for occupancy and rental.

Viability (permitted uses)

  • Long-term rental: yes (Springfield Chapter 1107 accessory dwelling provisions) 30+day rental of an ADU is a permitted accessory residential use under Chapter 1107. Landlord-tenant law (ORC 5321) governs.
  • Short-term rental: with-restrictions (Springfield Codified Ordinances rental-registration provisions) Springfield does not run a separate STR licensing scheme as of Apr 2026 but requires landlord rental registration and lodging-tax remittance to Clark County for stays under 30 days. ADU may serve as STR if rental registration is current.
  • Office rental: no Chapter 1107 limits accessory dwellings to dwelling-unit use; commercial office tenant not permitted in residentially-zoned ADU.
  • Home office: yes Home occupation is a permitted accessory use citywide subject to traffic, signage, and customer-volume limits.
  • Studio / workshop: yes Personal artist/workshop use is a permitted accessory residential use; Wittenberg-faculty studio sheds are common in the University area.
  • Agriculture: with-restrictions Backyard chickens/bees allowed by permit citywide; no livestock; the ADU itself remains residential.
  • Relative support: yes Family-occupancy ADU explicitly permitted; common Springfield use is multigenerational housing on older South Fountain blocks.

Incentives

  • Community Reinvestment Area (CRA) tax abatement — Springfield's CRA program offers up to 100% tax abatement on new-construction residential improvements (including detached ADUs counted as new residential value) for 10-15 years on qualifying parcels in designated CRAs. Coverage spans much of the older grid (downtown, South Fountain, Wittenberg-area).

Contacts

DepartmentCity of Springfield Community Development - Planning & Zoning Division and Building Regulations Division

Staff: Michael Reffitt (Chief Building Official, Building Regulations) mreffitt@springfieldohio.gov, Vaidehe Agwan (City Planner, Planning & Zoning Division) vagwan@springfieldohio.gov, Isabel Travis (Planning and Zoning Technician) itravis@springfieldohio.gov, Logan Cobbs (Director, Community Development)

Utilities

  • Water: City of Springfield Water - drawn from the Mad River buried-valley aquifer · 28d connect · $3,800
  • Sewer: City of Springfield Wastewater Treatment Plant · 30d connect · $4,200
  • Electric: AES Ohio (formerly Dayton Power & Light) - investor-owned utility serving most of Springfield · 21d connect · $1,650
  • Gas: CenterPoint Energy Ohio (formerly Vectren) · 28d connect · $1,450

Property values & taxes

Median value$138,500
Median tax$2,270/yr
Effective rate1.6%

Market rent by ADU size

Sq ftRent
400$825/mo
600$1,100/mo
800$1,325/mo
900$1,450/mo

Construction timeline

Detached build22 weeks
Conversion10 weeks
Contractor lead3 months

Realistic total: best 6mo · typical 9mo · worst 14mo

Springfield has a thinner GC bench than Columbus or Dayton; many ADU jobs use Greene/Montgomery County builders willing to commute to I-70. Mad River buried-valley aquifer requires careful sewer-lateral coordination.

Modular pathway Ohio Industrialized Unit Program (OBBS) · inspectors are rare with modular · 1 modular permits (last 24mo)

I-70 access is straightforward; older grid lots in South Fountain have narrow alleys and overhead power that limit module width to ~14 ft.

Financing

Typical HELOC8.7%
Cash-out refi avg7.6%
Fannie Mae ADUeligible

Insurance impact

Annual premium delta$280
Landlord policyrecommended
Umbrella threshold$1M umbrella when long-term renting

Tornado-alley exposure (Clark County is in the southwestern Ohio severe-weather corridor) modestly inflates premium quotes; hail and wind are the primary loss drivers, not seismic or wildfire.

HOA prevalence & preemption

% parcels under HOA22%
State HOA preemptionno
Preemption citationOhio Planned Community Law (ORC Chapter 5312) - no statutory ADU override

Springfield is mostly fee-simple older grid lots with limited HOA presence; HOA covenants concentrate in newer subdivisions north and west of the city. Where covenants prohibit accessory dwellings or secondary kitchens, those covenants remain enforceable - Ohio has no AB 670-style override.

Regulatory overlays (3)

  • historic-district — South Fountain Avenue Historic District (NRHP-listed); Old Reid Park / Wittenberg-adjacent contributing structures; downtown Heritage District · +21d · +8% cost
    Historic Design Guidelines govern infill/accessory features in the South Fountain district; Architectural Review Board sign-off needed. (map)
  • flood-zone — Mad River and Buck Creek FEMA Zone AE corridor running through Springfield (downtown to North Hampton) · +14d · +5% cost
    Finished-floor elevation 1 ft above BFE in Zone AE; flood vents on enclosed below-base areas; carriage-house parcels in the Buck Creek floodway need engineering review. (map)
  • other — National Trail (Old US 40) corridor cultural-resource sensitivity; Wittenberg University environs · +7d · +2% cost
    National Trail (the original National Road) bisects Springfield; SHPO consultation may be triggered for ADUs adjoining Trail-listed structures. (map)
Technical envelope (climate & building code)

Climate & energy code

IECC climate zone5A
Heating degree days5,800
Cooling degree days850
Frost depth32"
Design snow load20 psf
Wind design speed105 mph
Seismic design cat.A
Annual rainfall39"
Wildfire exposurelow
Energy codeIECC
Version / adopted2018 / 2020

Building code

Base codeOhio Residential Code (RCO) - based on IRC 2018 with state amendments
Version year2,018
Adopted2020-07-01
Fire sprinklernone
Egress window5.7 sqft min
Min ceiling7 ft
Attic R-valueR-49 min
Wall R-valueR-20 min

Amendments:

Contractor market (aggregate)

Licensed residential GCs180
ADU-specialist GCs14
Laborer median wage$25/hr

Known issues (1)

  • policy-review (since 2025-05) — Expect informal staff interpretations to harden into written guidance through 2026; first batch of ADU permits under the new code is the test cohort. (source)
Clark County — county ADU rules and overlays

County ADU ordinance

Clark County, Ohio (~133,500 residents; county seat Springfield; 10 townships - Bethel, German, Green, Harmony, Mad River, Madison, Moorefield, Pike, Pleasant, and Springfield Township; incorporated places Springfield (city, county seat, ~59,680), New Carlisle (city, ~5,693), Catawba (village), Donnelsville (village), Enon (village - partly extends into Greene County), Medway (village), North Hampton (village), South Charleston (village), South Vienna (village), and Tremont City (village)) DOES exercise county-tier zoning under O.R.C. Chapter 303. Clark County is among the minority of Ohio counties that have adopted a county Rural Zoning Resolution (Resolution adopted under O.R.C. 303.02 et seq. by the Board of County Commissioners); the county Combined Planning & Zoning office administers it for unincorporated parcels in any township that has not adopted its own independent township zoning resolution under O.R.C. Chapter 519. Most Clark County townships (including Mad River, Bethel, Springfield Township, and German) operate under the county Rural Zoning Resolution rather than maintaining a separate township ordinance; a few have their own (Green Township, Moorefield Township, and Pleasant Township each carry stand-alone zoning resolutions). The county Rural Zoning Resolution treats accessory dwelling units as 'accessory residential structures' or 'second dwellings on a parcel,' with permission turning on the parcel's zoning district (A-1 Agricultural and R-1/R-2/R-3 Residential have differing accessory-use allowances), minimum lot area, setbacks, and a septic-capacity finding from the Clark County Combined Health District. Ohio is a home-rule state under Article XVIII of the Ohio Constitution, which insulates municipalities from county zoning inside their corporate limits; the county ordinance therefore does NOT govern parcels inside Springfield, New Carlisle, or any of the incorporated villages - each of those administers its own zoning code. The Mad River corridor through Mad River and Bethel townships is a meaningful overlay-adjacent factor because Mad River is a state-designated scenic river and a heavily-mapped FEMA Zone AE floodplain.

State-floor overlay: No Ohio statewide ADU preemption is in force as of 2026-05-20. Clark County and each of its incorporated municipalities and zoned townships retain full authority over ADU zoning and permitting under O.R.C. Chapters 303, 519, and 713 plus Ohio Constitution Article XVIII.

County regulatory overlays

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.

ZIP Codes

  • 45501
  • 45502
  • 45503
  • 45504
  • 45505
  • 45506

Post Office

  • 150 N Limestone St, 45501