Fees, valuation & enforcement
Permit fees are a project input. Enforcement exposure is a project risk. Use the official schedule where available, then confirm valuation, trade permits, plan review, and inspection charges with the Authority Having Jurisdiction.
Official fee pathway
The final charge may depend on declared construction value, occupancy classification, square footage, plan review, state surcharges, trade permits, technology fees, and inspection activity. Do not use a neighboring city’s fee table as a substitute for this jurisdiction.
Fee desk contact
OKSFM 405-522-5005; Stephens County Courthouse 580-255-4193; Duncan AHJ 580-251-7728
Ask the counter to confirm current charges before submitting a project with multiple trades or a change of use.
Financial exposure
Plan for building, mechanical, plumbing, electrical, fire, energy, zoning, septic, right-of-way, or other reviews that the project scope triggers. The lowest initial permit fee is not always the lowest project cost.
Enforcement exposure
When work begins without authorization, the agency may halt the site, require corrective plans, impose additional fees, withhold inspection release, or require concealed work to be exposed for review.
Closeout exposure
A missing final inspection or certificate can complicate occupancy, refinancing, sale, insurance, and utility connection. Preserve the approved plans and signed inspection record through closeout.
Professional field note
Even when a cosmetic or minor project does not require a building permit, zoning, floodplain, shoreline, historic, utility, fire, or right-of-way controls may still apply. Confirm the full jurisdictional picture before work starts.
Source trail
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
This record is marked State Fallback. Confirm whether a city, state agency, or other local authority controls the parcel before filing.
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact OKSFM 405-522-5005; Stephens County Courthouse 580-255-4193; Duncan AHJ 580-251-7728.
OKSFM strives for a 30-day plan review, but its current FAQ reports an approximately 4-8 week queue before review depending on project complexity, staffing, and submittal volume. Stephens County publishes no separate county review timeline.
For OKSFM projects, request 50% or 100% inspections by emailing angela.aguilar@fire.ok.gov or calling 405-522-5005, with at least 7 days' advance notice and the permit number plus contact details. One 50% and one 100% inspection are included in the state permit fee; failed final/reinspection visits incur the published state charge. Duncan and Marlow handle inspections within their municipal AHJ boundaries.
For unincorporated Stephens County, the Oklahoma State Fire Marshal requires compliance with the minimum codes adopted by the Oklahoma Uniform Building Code Commission (OUBCC), including applicable current building and fire/life-safety standards; exact 2026 editions are N/A. Duncan is a current municipal AHJ and Marlow is listed in the current state AHJ list; tribal trust property follows the corresponding tribal government. No current county minor/cosmetic exemption list was found. OKSFM identifies limited elements that may begin before full permit issuance, including site work/site utilities, cast piles, pile caps, foundations, piers, grade beams, slabs, structural columns/beams, civil abutments, and retaining walls, subject to the state process.
Why permit costs vary
Building departments commonly calculate charges from valuation, occupancy, floor area, project type, plan review effort, trade scope, state surcharges, and inspection activity. A remodel that appears small on paper may still trigger structural, energy, fire, or utility review. Ask the permit counter which disciplines apply before you finalize the construction budget.
The same discipline applies to enforcement. Correcting unpermitted work after finishes are installed can require demolition, revised plans, additional inspections, and schedule disruption. Authorization is usually the less expensive project-management decision.