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Codes, exemptions & field inspections

Build to the adopted code. Verify every exception.

This guide translates the available agency record into a preconstruction checklist for structural scope, minor work, and inspection release. The adopted code and the issuing official control when a field condition is disputed.

Regulatory framework

The code baseline for Boone County.

2015 International Codes for Boone County, including the 2015 International Building, Residential, Mechanical, Plumbing, and related codes with Boone County addenda; the inspection page states these codes apply to permits issued on or after April 1, 2017. County jurisdiction is primarily the unincorporated area; Columbia has its own building office, while the county has agreements with Centralia, Sturgeon, Harrisburg, Hallsville, Hartsburg, and Rocheport.

Inspection lane

Submit the online permit application with all required information and a site drawing; incomplete submissions are not processed. New construction requires a site/setback inspection before permit issuance effective June 1, 2026. After the application and payment are processed, call the Inspections office at 573-886-4339 to schedule; the county requires at least 24 hours' notice and does not schedule inspections by email. A Certificate of Occupancy is required before occupancy, and the county says temporary/final certificates generally take three business days to process.

Minor-work playbook

Understand what may be exempt—and what is not.

Cosmetic work does not require a building permit. The county does not require a demolition permit, although the Fire Protection District or Health Department may have separate requirements. The county's published permit list generally requires permits for commercial or industrial structures, single-story residential/accessory structures over 160 square feet, structural/electrical/plumbing/HVAC/insulation work, homes and additions, re-roofing, mobile/modular homes, garages, carports, sheds, barns, workshops, pools, greenhouses, fences over 12 feet, retaining walls over 4 feet, and towers.

Field rule

A permit exemption generally addresses one narrow construction trigger. It does not automatically waive zoning, land-use, floodplain, shoreline, fire, energy, electrical, utility, septic, or right-of-way requirements. Obtain written confirmation when the project involves a new structure, structural alteration, change in occupancy, or concealed work.

Inspection pipeline

Keep the work visible at every release point.

  1. 1

    Request with lead time

    Submit the online permit application with all required information and a site drawing; incomplete submissions are not processed. New construction requires a site/setback inspection before permit issuance effective June 1, 2026. After the application and payment are processed, call the Inspections office at 573-886-4339 to schedule; the county requires at least 24 hours' notice and does not schedule inspections by email. A Certificate of Occupancy is required before occupancy, and the county says temporary/final certificates generally take three business days to process.

  2. 2

    Preserve access

    Do not cover framing, reinforcement, wiring, piping, damp-proofing, or life-safety work until the required inspection has been completed and documented.

  3. 3

    Close the record

    Retain the approved plans, inspection approvals, correction responses, and final certificate or occupancy release with the property file.

Contractor verification

Verify the builder before the contract is signed.

Use the state licensing system to verify active registration, trade credentials, bond status, and liability coverage where available. Match the legal business name to the proposal and permit application.

No verified lookup link

Planning reference

Keep the parcel rules beside the building plans.

A building permit is only one part of statutory compliance. Check the local zoning, ordinance, map, or land-use reference before finalizing setbacks, height, lot coverage, access, drainage, or accessory structure placement.

Open planning reference ↗

Source trail

Official sources for this profile

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.

Agency websiteOpen official source ↗Permit portalOpen official source ↗Fee scheduleOpen official source ↗Planning or zoning referenceOpen official source ↗

Project questions

Frequently asked questions for Boone County

Who handles permitting for this jurisdiction?

Boone County Resource Management — Planning, Inspection, and Engineering Services is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.

How should I begin an application?

Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact 573-886-4330 (Resource Management); 573-886-4339 (Inspections).

How long might review take?

No general permit-review timeline is published. Temporary and final Certificates of Occupancy are generally processed within three business days; inspections require at least 24 hours' notice.

How are inspections scheduled?

Submit the online permit application with all required information and a site drawing; incomplete submissions are not processed. New construction requires a site/setback inspection before permit issuance effective June 1, 2026. After the application and payment are processed, call the Inspections office at 573-886-4339 to schedule; the county requires at least 24 hours' notice and does not schedule inspections by email. A Certificate of Occupancy is required before occupancy, and the county says temporary/final certificates generally take three business days to process.

Which codes and exemptions should I review?

2015 International Codes for Boone County, including the 2015 International Building, Residential, Mechanical, Plumbing, and related codes with Boone County addenda; the inspection page states these codes apply to permits issued on or after April 1, 2017. County jurisdiction is primarily the unincorporated area; Columbia has its own building office, while the county has agreements with Centralia, Sturgeon, Harrisburg, Hallsville, Hartsburg, and Rocheport. Cosmetic work does not require a building permit. The county does not require a demolition permit, although the Fire Protection District or Health Department may have separate requirements. The county's published permit list generally requires permits for commercial or industrial structures, single-story residential/accessory structures over 160 square feet, structural/electrical/plumbing/HVAC/insulation work, homes and additions, re-roofing, mobile/modular homes, garages, carports, sheds, barns, workshops, pools, greenhouses, fences over 12 feet, retaining walls over 4 feet, and towers.

Field sequencing matters

The inspector needs to see the work at the right moment.

Code compliance is not only a plan-review exercise. Footings, reinforcement, framing, fireblocking, wiring, piping, insulation, weather protection, and life-safety systems each have points where the work must remain accessible. Build the inspection calendar into the trade schedule instead of treating it as a final administrative step.

When a project qualifies for a narrow minor-work exemption, keep a written explanation of why it qualifies and confirm that related zoning, utility, fire, energy, or environmental rules do not create a separate approval requirement.

Closeout file

Keep the approved plan set, inspection approvals, correction responses, contractor license verification, final certificate, and any occupancy release together. A clean record protects the owner, builder, lender, insurer, and future buyer.