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Permitting Authorities / City of Dayton, Ohio - Division of Building Inspection

City of Dayton, Ohio - Division of Building Inspection

Adopted code

The permitting authority for the City of Dayton, Ohio (Montgomery County). Dayton's Division of Building Inspection sits within the city's Department of Economic Development and operates a state-certified local building department that administers permits, fees, and inspections under the Residential Code of Ohio (RCO); the technical roof-covering content of that code is set by the state Board of Building Standards and is uniform statewide (Ohio Rev. Code 3781.11), so Dayton's own levers are permit administration, contractor registration (limited to a handful of specialty trades), fees, historic-district review, and inspection scheduling rather than code content. Ohio Rev. Code 3781.01(B) lets a municipal corporation add non-conflicting local regulations; Dayton has exercised that authority through its own Unified Building Code chapter (Code of Ordinances, Title XV, Chapter 153), which was read in full for this record (via an independent, non-Cloudflare-walled mirror of the city's own Code of Ordinances) and adds only administrative/appeals provisions, not roof-covering technical content. Notably, Dayton exempts a simple shingle-only re-roof from the building-permit requirement altogether - see repair_permit_threshold.

Jurisdiction
City of Dayton, Ohio
Jurisdiction type
city
Address
371 W. Second St., Dayton, OH 45402
Contact
  • url: https://www.daytonohio.gov/190/Building-Inspection
  • phone: 937-333-3883
Roofing permit required
Not required
Contractor registration required
Not required
Registration details
  • license: CITY-SPECIFIC sourced negative for roofing, and the sharpest state-vs-city split found in the Ohio metro wave so far. Dayton's Division of Building Inspection runs a contractor-registration program, but its own "Contractors Registration & Bond Forms" page enumerates only four registered trades: Electrical, Pipe-Laying, Plumbing, and Warm Air Heating (HVAC); the companion "Registered Contractors Lists" page names the same four categories. No roofing, general-contracting, or home-improvement-contractor registration category exists on either page, and none was found via targeted search of daytonohio.gov. This differs from Cincinnati and Cleveland, both of which register general/home-improvement contractors covering roofing work. IMPORTANT STATE-VS-CITY SPLIT (as already established for Cincinnati/Cleveland): Ohio has no statewide residential roofing contractor license - Ohio Rev. Code Chapter 4740 (OCILB) licenses only electrical, HVAC, plumbing, hydronics, and refrigeration contractors, and expressly excludes "a residential building as defined in section 3781.06" from its "construction project" definition for commercial work, so roofing is outside the chapter's scope entirely. One nuance a roofer should know: Dayton's own Permit Process FAQ separately states that for rental properties, unoccupied homes, or duplexes undergoing permitted work, "A contractor, registered with the City of Dayton, must be hired" (as opposed to an owner-occupant doing the work personally) - that FAQ item does not specify which trades the phrase reaches, and does not identify a roofing-specific registration category; read together with the enumerated four-trade list, the most supportable reading is that the phrase refers to the same four registered specialty trades (relevant if the reroofing work triggers electrical/plumbing/HVAC scope), not to a general roofing-contractor registration that does not appear to exist in Dayton.
Permit process note
Dayton's Division of Building Inspection is at 371 W. Second St., Dayton, OH 45402 (One Stop Center, 2nd floor); general phone 937-333-3883, fax 937-333-4284; hours M-F 8:30 a.m.-4:30 p.m.; Chief Building Official Scott Adams ([email protected]). Per the Division's own Permit-Process FAQ, "The Building Inspection Division strives to review and provide comments, as appropriate, no later than 30 calendar days following the date of application," and "Three copies of the site plan, construction documents, and supporting information are to be submitted with the application." Permit-fee cost estimates go through 937-333-6794; form-completion problems go through 937-333-3979. Online applications were not yet available as of this verification; the city stated it is upgrading its permitting software. The Division's own "Inspection Procedures Bulletin" (3/2021) instructs applicants to "CALL FOR THE REQUIRED INSPECTIONS" at least 24 hours in advance and lists dedicated phone lines by trade (e.g., Structural 333-3897, Electrical 333-3881, Plumbing/Water/Gas/Sewer 333-3892, Mechanical 333-3980).
Adopted code
SET BY STATE RULE. Ohio regulates one-, two-, and three-family dwelling construction through a single statewide code, the Residential Code of Ohio (RCO), adopted by the state Board of Building Standards under Ohio Revised Code Chapter 3781 and codified in Ohio Administrative Code Chapter 4101:8. The current edition is the "2019 Residential Code of Ohio," based on the 2018 International Residential Code, as subsequently amended effective March 1, 2024 and April 15, 2024. Ohio has NOT moved to a newer IRC base edition as of this verification date. Dayton's own city website (daytonohio.gov/194/Building-Codes) independently confirms the city currently enforces the "2019 Residential Code of Ohio (This version of the residential code became effective July 1, 2019.)" for residential structures and the "2024 Ohio Building Code" for commercial structures. Dayton's codified local building chapter (Code of Ordinances Title XV, Chapter 153) is published on a host this directory could not open directly; its content is not restated here.
Drip edge
Not required — SET BY STATE RULE, and a genuine, non-obvious deviation from most other IRC-based states. Ohio's RCO does NOT carry forward the base IRC's prescriptive drip-edge provision. The entire content of RCO Section 905.2.8.5 is, verbatim: "905.2.8.5 Drip edge. Refer to Sections 903.1 and 905.1." Neither cross-referenced section imposes a drip edge: Section 903.1 (General) requires only that roof coverings be "secured to the building or structure" per the chapter's provisions and the "approved manufacturer's instructions," and Section 905.1 is a general wind-load-resistance provision. There is therefore no numbered Ohio provision requiring a drip edge at eaves and rakes with the usual dimensional and fastening specifications; where a drip edge is required in Ohio, it is required by the roof-covering manufacturer's approved installation instructions operating through Section 903.1, not by a freestanding code mandate. About drip edge
Ice & water shield
Required — SET BY STATE RULE - required in Dayton exactly as everywhere else in Ohio, because Ohio makes the ice-damming determination statewide by rule rather than leaving it to local option. RCO Table 301.2(1) pre-fills "Ice Barrier Underlayment Required" as "Yes" for the whole state, with footnote (h) reciting that "all jurisdictions in Ohio have a history of local damage from the effects of ice damming." RCO Section 905.1.2 (Ice barriers) then requires an ice barrier for asphalt shingles and other listed coverings, consisting of not fewer than two layers of cemented underlayment or a self-adhering polymer-modified bitumen sheet, extending not less than 24 inches inside the exterior wall line (36 inches on slopes of 8:12 or greater). Exception: "Detached accessory structures and roof assemblies terminating at a vertical wall over unconditioned floor areas." About ice & water barrier
Mid-roof inspection
Not required — CITY-SOURCED negative. The Division of Building Inspection's own "Inspection Procedures Bulletin" (3/2021) lists the "GENERAL INSPECTION PROGRESSION" for permitted construction in Dayton, in order: Foundation excavation, Foundation & Waterproofing, Concrete Floors & Slabs, Crawlspace, Rough mechanical, Framing ("After the mechanical systems have been roughed-in and approved and building dried-in, the framing inspection is conducted"), Energy Conservation, and Final Inspections. No roof-covering-specific or mid-roof inspection step appears anywhere in that list; the bulletin was grepped for "roof" and "sheath" and returned no relevant hits beyond the word "roof" inside "waterproofing." Because Dayton additionally exempts a simple shingle-only re-roof from the building-permit requirement altogether (see repair_permit_threshold), a permit-triggered inspection would not even arise for the routine residential re-roof case in the first place.
Repair permit threshold
CITY-SPECIFIC, and unusually permissive, mirroring Cincinnati's pattern. The Division of Building Inspection's own FAQ, "Do I need a permit to install or re-roof my house?", states verbatim: "If you are simply applying a new layer of shingles you do not need a building permit. If you are replacing or repairing any portion of the wood sheathing supporting the shingles or structural members like rafters or trusses, a building permit is required." The same FAQ separately states the two-layer ceiling, verbatim: "when recovering an existing roof, the new roof covering cannot be installed without first removing all coverings when the existing roof has two or more layers of any type of roofing to keep from overloading the roof structure" - mirroring the state RCO 908.3.1.1 rule (see roof_layer_limit). The FAQ also notes a homeowner may need a Certificate of Appropriateness from Dayton's Landmarks Commission (937-333-3670) if the property is in a historic district. Practical effect: a routine shingle-only re-roof of a 1-, 2-, or 3-family dwelling needs no building permit in Dayton so long as it does not create a third roofing layer and does not touch the sheathing or structural framing; work reaching the deck or framing requires a permit.
Wind design criteria
SET BY STATE RULE. RCO Table 301.2(1) ("Climatic and Geographic Design Criteria"), as printed in the state rule itself, pre-fills a Wind Design Speed of 115 mph (ultimate design wind speed) for the entire state - the value is printed in the rule's own table rather than left blank for local fill-in. The same statewide table also pre-fills Weathering as "severe," Termite as "moderate to heavy," and Ice Barrier Underlayment Required as "Yes." Wind exposure category is determined site-specifically rather than by state or city rule. Ground snow load is the one geographically-varying input and is NOT a statewide constant: the master rule leaves that cell blank, with footnote (o) directing that "the jurisdiction shall fill in this section of the table using the Ground Snow Loads in Figure 301.2(6)." No Montgomery County / Dayton ground snow load figure was obtained from a Montgomery County or City of Dayton source this session.
Roof layer limit / recover
SET BY STATE RULE, and independently echoed in Dayton's own permit FAQ wording (see repair_permit_threshold). RCO Section 908.3 (Roof replacement) states: "Roof replacement shall include the removal of existing layers of roof coverings down to the roof deck. Exception: Where the existing roof assembly includes an ice barrier membrane that is adhered to the roof deck, the existing ice barrier membrane shall be permitted to remain in place and be covered with an additional layer of ice barrier membrane in accordance with Section 905." Section 908.3.1 (Roof recover) permits installing a new roof covering over an existing one where the manufacturer's approved instructions are followed (among other conditions). Section 908.3.1.1 (Roof recover not allowed) bars a recover where the existing roof is water-soaked/deteriorated, is slate, clay, cement, or asbestos-cement tile, or "has two or more applications of any type of roof covering." Net effect for the common asphalt-shingle case: one existing layer may be recovered over; once two or more layers already exist, full tear-off to the deck is mandatory.
Deck & sheathing requirements
SET BY STATE RULE - applies identically in Dayton as everywhere else in Ohio. RCO Section 905.2.1 (Sheathing requirements) states verbatim: "Asphalt shingles shall be fastened to solidly sheathed decks." Ohio carries this base IRC language through without amendment - no Ohio- or Dayton-specific addition was found in the rule text or in Dayton's own Chapter 153 (read in full; see adopted_code).
Sales & use tax
Montgomery County's combined state-and-local sales and use tax rate is 7.50%, per the Ohio Department of Taxation's Sales and Use Tax Rate Map (dated March 31, 2026, reflecting rates in effect as of October 2025): a 5.75% state rate plus a 1.25% Montgomery County permissive rate plus a 0.50% transit permissive rate, printed in the map's own county table as "Montgomery 1.25% 0.50% 7.50%." The map's narrative separately lists Montgomery County among the counties with rates of 7.30 percent or higher, at "7.50 percent."

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