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Commercial Tenant Improvement / Change of Use Permit in Plummer, Idaho

Covers remodel, fit-out, and change-of-use work within existing commercial space in the City of Plummer. The City's Rate Book (March 2026) lists two distinct valuation lines for this scope under BUILDING VALUATION: 'Remodel — Commercial: 20% of adjusted square footage costs' (a formula-based valuation tied to the same ICC Building Valuation Data cost-per-square-foot figures used for new commercial construction) and, as a separate line item, 'Change of use/tenant improvement: Approved declared value' (the applicant's declared project value, as approved by the reviewing official, used directly rather than a formula). Both valuations then feed the same 1997 Uniform Building Code fee table used for new construction and residential permits, plus the City's 25% surcharge. There is no dedicated TI application — the same generic City of Plummer Utility Work Permit/Plan Review Application is used, with the applicant checking 'IB' and describing the scope of work.

Reviewed 2026-08-02 · Source

When you need this permit

  • Required for remodel, fit-out, or change-of-use work within an existing commercial building in Plummer city limits
  • Application submitted to and issued through Plummer City Hall (880 C Street) — the same generic Building Permit/Plan Review Application used for new commercial construction and residential work; no separate TI-specific form exists
  • Valuation basis depends on the nature of the work: physical remodel work is valued at 20% of the adjusted square-footage cost from the ICC Building Valuation Data table for the applicable occupancy/construction type (Rate Book's 'Remodel — Commercial' line); a change-of-use scope is instead valued at the applicant's approved declared value ('Change of use/tenant improvement' line) — the Rate Book lists these as two separate line items without further published guidance distinguishing when each applies, so confirm with City Hall which applies to a given project
  • Completed application must be sent to rhi@cityofplummer.org
  • Separate permits are required for electrical, plumbing, HVAC, and sewer work (administered by Idaho DOPL, not the City, per the same application form)
  • Sign permits ($50 flat fee) and demolition permits ($65 flat fee) are billed as their own separate Rate Book line items if a TI project also involves new signage or interior demolition

Required documents

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Fee schedule

Commercial Remodel — valuation basisPlummer Rate Book (March 2026), Building Valuation table, 'Remodel — Commercial' line (distinct from the 'Residential' remodel line, which is a flat $18.55/sq ft). 'Adjusted square footage costs' ties back to the same ICC Building Valuation Data $/sq ft figures used for new commercial construction (e.g., B Business ranges $104.41-$152.75/sq ft by construction type). This valuation then feeds the 1997 UBC fee table below.
20% of adjusted square footage costs
Change of Use / Tenant Improvement — valuation basisPlummer Rate Book (March 2026), Building Valuation table, separate 'Change of use/tenant improvement' line — valuation is the applicant's declared project value as approved by the reviewing official, rather than a formula. This valuation then feeds the 1997 UBC fee table below.
Approved declared value
Building Permit — valuation $1 to $500Plummer Rate Book (March 2026), 1997 Uniform Building Code fee table, plus the City's 25% surcharge
$23.50
Building Permit — valuation $501 to $2,000Plummer Rate Book (March 2026)
$23.50 for the first $500, plus $3.05 for each additional $100 or fraction thereof, plus City's 25% surcharge
Building Permit — valuation $2,001 to $25,000Plummer Rate Book (March 2026) — likely bracket for a small commercial tenant-space remodel
$69.25 for the first $2,000, plus $14 for each additional $1,000 or fraction thereof, plus City's 25% surcharge
Building Permit — valuation $25,001 to $50,000Plummer Rate Book (March 2026)
$391.25 for the first $25,000, plus $10.10 for each additional $1,000 or fraction thereof, plus City's 25% surcharge
Building Permit — valuation $50,001 to $100,000Plummer Rate Book (March 2026)
$643.75 for the first $50,000, plus $7 for each additional $1,000 or fraction thereof, plus City's 25% surcharge
Demolition (all)Plummer Rate Book (March 2026), Building Valuation table — applies if TI scope includes interior demolition, billed separately from the remodel/change-of-use valuation fee
$65 flat fee
SignPlummer Rate Book (March 2026), Building Valuation table — applies if TI scope includes new signage, billed separately from the remodel/change-of-use valuation fee
$50 flat fee

Review timeline

Plan review
Not published — contact the department

How long did your Commercial Tenant Improvement / Change of Use Permit permit actually take in Plummer?

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

Inspection process

  1. 1

    Footings / Poles

    Only applicable if the TI scope includes new foundation/footing work. Listed on the same generic inspection log printed on the combined application form used for all permit types; not every stage applies to every TI project.

  2. 2

    Framing

    Only applicable if the TI scope includes new or altered framing

  3. 3

    Insulation

    Only applicable if the TI scope disturbs or adds insulated wall/ceiling assemblies

  4. 4

    Drywall / Sheet Rock

    Only applicable if the TI scope includes new or patched drywall/sheetrock

  5. 5

    Final Inspection

    All work complete per approved plans — applies to every TI/change-of-use permit regardless of scope

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

Tips

  • Two different valuation methods appear in the Rate Book depending on how the project is characterized: a straight remodel is valued at 20% of adjusted square-footage cost, while a change of use is valued at the applicant's approved declared value. Which line applies isn't spelled out beyond the two entries themselves — confirm with City Hall (208-686-1641) before budgeting.
  • The same City 25% surcharge and 1997 UBC valuation-based fee table apply to TI/change-of-use permits exactly as they do to new construction and residential permits.
  • There is no dedicated tenant-improvement application — use the same combined City of Plummer Utility Work Permit/Plan Review Application used for every other permit type in this file, checking 'IB' rather than 'IRC'.
  • Demolition and signage components of a TI project are billed as their own separate flat-fee line items ($65 and $50 respectively) in addition to the base remodel/change-of-use valuation fee.
  • Not every inspection stage printed on the application's generic inspection log applies to a given TI — only the stages matching the actual scope of work (e.g., a cosmetic fit-out with no new framing would skip the Footings/Poles and Framing lines) plus the Final Inspection, which always applies.

Frequently asked questions

Plummer requires a commercial tenant improvement / change of use permit for: Required for remodel, fit-out, or change-of-use work within an existing commercial building in Plummer city limits; Application submitted to and issued through Plummer City Hall (880 C Street) — the same generic Building Permit/Plan Review Application used for new commercial construction and residential work; no separate TI-specific form exists; Valuation basis depends on the nature of the work: physical remodel work is valued at 20% of the adjusted square-footage cost from the ICC Building Valuation Data table for the applicable occupancy/construction type (Rate Book's 'Remodel — Commercial' line); a change-of-use scope is instead valued at the applicant's approved declared value ('Change of use/tenant improvement' line) — the Rate Book lists these as two separate line items without further published guidance distinguishing when each applies, so confirm with City Hall which applies to a given project; Completed application must be sent to rhi@cityofplummer.org; Separate permits are required for electrical, plumbing, HVAC, and sewer work (administered by Idaho DOPL, not the City, per the same application form); Sign permits ($50 flat fee) and demolition permits ($65 flat fee) are billed as their own separate Rate Book line items if a TI project also involves new signage or interior demolition. If your project isn't listed, confirm with City of Plummer Planning, Zoning & Building Department at (208) 686-1641 before starting work.

The City's Rate Book (March 2026) lists two separate valuation methods: a 'Remodel — Commercial' line valued at 20% of the ICC Building Valuation Data's adjusted square-footage cost for the applicable occupancy/construction type, and a separate 'Change of use/tenant improvement' line valued at the applicant's approved declared project value. Either valuation then runs through the same 1997 Uniform Building Code fee table used elsewhere in this file, plus the City's 25% surcharge. The Rate Book does not spell out which of the two lines applies to a given project — confirm with City Hall.

Plummer does not publish a plan-review timeline for this permit. Contact City of Plummer Planning, Zoning & Building Department at (208) 686-1641 for current turnaround.

You'll need: City of Plummer Building Permit Application; Construction Drawings / Floor Plan. See the required-documents checklist on this page for details on each.

Plummer requires 5 inspection(s) for a commercial tenant improvement / change of use permit, in order: Footings / Poles, Framing, Insulation, Drywall / Sheet Rock, Final Inspection. Schedule each through City of Plummer Planning, Zoning & Building Department ((208) 686-1641).

Apply through City of Plummer Planning, Zoning & Building Department at 880 C Street, P.O. Box B, Plummer, ID 83851. Phone: (208) 686-1641, email: rhi@cityofplummer.org. Office hours: Monday–Friday, 9:00 AM – 5:00 PM (closed federally recognized holidays); after-hours line (208) 755-2573. Official information: https://www.cityofplummer.org/planning-zoning-building.

Plummer, Idaho has adopted: 2018 International Building Code (IBC), with Idaho amendments; 2018 International Residential Code (IRC), Parts I, II, III and IX, with Idaho amendments — collectively named the Idaho Residential Code (2020 Edition); 2018 International Energy Conservation Code (IECC), with Idaho amendments — collectively named the Idaho Energy Conservation Code (2020 Edition); 2018 International Existing Building Code (IEBC); 2018 International Mechanical Code (IMC) — state-administered via Idaho DOPL, not city-issued; 2018 International Fuel Gas Code (IFGC) — state-administered via Idaho DOPL, not city-issued; 2018 International Residential Code Parts V and VI (mechanical/fuel gas) — state-administered via Idaho DOPL; 2017 Idaho State Plumbing Code, based on the 2015 Uniform Plumbing Code — state-administered via Idaho DOPL, not city-issued; 2023 National Electrical Code (NEC), with Idaho amendments — state-administered via Idaho DOPL, not city-issued; 2018 International Fire Code (IFC) — administered by the Idaho State Fire Marshal. Local amendments apply — see the Plummer overview page for the full list.

No. Plummer uses the same combined 'City of Plummer Utility Work Permit/Plan Review Application' used for new commercial construction and residential work. The applicant checks 'IB' under Plan Checked and describes the scope of work; there is no TI-specific form.

Sources & verification

Key facts verified against official sources. Last reviewed 2026-08-02.

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 Plummer building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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