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Accessory Structure / Deck Permit in Ronan, Montana

Required for detached accessory structures (sheds, garages) and decks within Ronan city limits that exceed the City's posted 2012 IBC/IRC permit-exemption thresholds, using the standard Application for Building Permit.

Verified 2026-07-03 · Source

When you need this permit

  • A detached one-story accessory structure (tool/storage shed, playhouse) exceeding 120 sq ft (per the City's posted 2012 IBC exemption list) or 200 sq ft (per the City's posted 2012 IRC exemption list, applicable to one- and two-family dwelling accessory structures) requires a Building Permit
  • A deck exceeding 200 sq ft in area, OR more than 30 inches above grade at any point, OR attached to a dwelling, OR serving a required exit door (per IRC Section R311.4) requires a Building Permit — decks meeting ALL FOUR exemption criteria (200 sq ft or less, 30 inches or less above grade, not attached to a dwelling, not serving a required exit) do not require a permit
  • Complete the standard Application for Building Permit with a description of the accessory structure/deck scope of work and estimated cost
  • Permit fee calculated from the City's valuation-based Building Permit Fee Schedule Worksheet

Required documents

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Fee schedule

Building Permit Fee (valuation-based, same schedule as new construction)City of Ronan Building Permit Fee Schedule Worksheet, adopted March 3, 2020
$35.00 minimum (valuation $1,999 or less), scaling per the City's Building Permit Fee Schedule Worksheet

Review timeline

Plan review
Not published — contact the department

How long did your Accessory Structure / Deck Permit permit actually take in Ronan?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

    See the full Ronan inspection guide — scheduling & re-inspection fees →

    Tips

    • A shed or similar one-story detached accessory structure of 120 sq ft or less (IBC-referenced) or 200 sq ft or less (IRC-referenced) does not require a building permit in Ronan — check both thresholds since the City's posted forms cite slightly different figures depending on which 2012 code section applies.
    • A deck must meet ALL FOUR exemption conditions simultaneously (200 sq ft or less, ≤30 inches above grade, unattached to the dwelling, not serving a required exit) to avoid needing a permit — a deck failing any one of these four conditions requires a Building Permit.
    • Retaining walls not over 4 feet high (unless supporting a surcharge) are also exempt from a building permit per the City's posted 2012 IBC/IRC lists.

    Frequently asked questions

    A one-story detached shed of 120-200 sq ft or less (depending on which code section applies) does not require a permit. A deck needs a permit unless it is 200 sq ft or less, no more than 30 inches above grade, unattached to the dwelling, and does not serve a required exit door. Source: City of Ronan '2012 IBC Exempt' and 'Work Exempt From Permits 2012 IRC' PDFs.

    In Ronan, the published Building Permit Fee (valuation-based, same schedule as new construction) is: $35.00 minimum (valuation $1,999 or less), scaling per the City's Building Permit Fee Schedule Worksheet. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

    Ronan does not publish a plan-review timeline for this permit. Contact City of Ronan Building Department — Building Official Dan Miller; city-certified for Building (B) permits only. Electrical, Plumbing, and Mechanical/HVAC permits within Ronan city limits are issued directly by the Montana Department of Labor & Industry Building Codes Bureau, not the City. at (406) 676-4231 for current turnaround.

    You'll need: Application for Building Permit (Accessory Structure/Deck). See the required-documents checklist on this page for details on each.

    Apply through City of Ronan Building Department — Building Official Dan Miller; city-certified for Building (B) permits only. Electrical, Plumbing, and Mechanical/HVAC permits within Ronan city limits are issued directly by the Montana Department of Labor & Industry Building Codes Bureau, not the City. at 207 Main St SW, Ste A, Ronan, MT 59864. Phone: (406) 676-4231, email: clerk@cityofronan.org. Office hours: City Hall business hours not separately published online; contact (406) 676-4231 or clerk@cityofronan.org. City ordinances may be obtained at 207 Main St SW during normal business hours per the City's own Ordinances page.. Official information: https://cityofronan.org/departments/planning-department/.

    Ronan, Montana has adopted: Montana has a mandatory statewide building code administered by the Montana Department of Labor & Industry (DLI) Building Codes Bureau, amended by the Administrative Rules of Montana (ARM) Title 24, Chapter 301. Cities, counties, and towns may become 'certified' to locally administer permitting and inspection for all or part of the code; non-certified trades in a partially-certified jurisdiction fall under direct state administration by the DLI Building Codes Bureau. Source: Montana DLI Building Codes Bureau, Certified City, County and Town Programs (bsd.dli.mt.gov/building-codes-permits).; Ronan is a Montana DLI-certified jurisdiction for Building (B) ONLY within city limits; certified building official on file with DLI: Dan Miller, (406) 676-4231. Verified directly against the DLI Building Codes Bureau's 'Montana Certified Local Government Program' roster PDF, updated 04/22/2026 (fetched and read directly, not via a mirror): 'Ronan | B | Dan Miller | 676-4231 | City Limits'. Source: https://bsd.dli.mt.gov/_docs/building-codes-permits/certified-city.pdf; The City of Ronan's own published Building Department forms reference the 2012 International Building Code (IBC) and 2012 International Residential Code (IRC), specifically Section 105.2 (IBC) / R105.2 (IRC) 'Work exempt from permit' provisions — a locally-adopted 2012-cycle edition, not the 2021-cycle state-adopted edition used by non-certified/directly-state-administered jurisdictions. Source: City of Ronan Building Department page, '2012 IBC Exempt' and 'Work Exempt From Permits 2012 IRC' PDFs (cityofronan.org/wp-content/uploads/2016/05/2012-IBC-Exempt.pdf and .../Work-Exempt-From-Permits-2012-IRC2.pdf).; Per the Montana DLI Building Codes Bureau's Current Codes page (statewide effective date June 11, 2022, governing state-administered permits and setting the baseline amendment framework under ARM Title 24 Chapter 301): 2021 IBC, 2021 IRC, 2021 IEBC, 2021 IMC, 2021 IFGC, 2021 IECC, 2021 ISPSC, 2021 UPC, 2020 NEC, 2017 ICC A117.1 Accessibility. Ronan's own published exemption-list forms cite the 2012 IBC/IRC by name rather than the current 2021-cycle editions; this discrepancy is reported as found rather than assumed away — the City's posted permit-exemption documents have not been confirmed updated to the current statewide cycle as of this review. Source: bsd.dli.mt.gov/building-codes-permits/current-codes. Local amendments apply — see the Ronan overview page for the full list.

    Sources & verification

    Verified against official sources. Last reviewed 2026-07-03.

    Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Ronan building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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