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Missouri, Clark County Remodeler Permit Regulations and County Ordinances for Unincorporated Areas

Clark County, Missouri Remodeling and Renovation Permit Requirements

In Clark County, Missouri, building permits are generally issued by individual city and town building departments. For properties in unincorporated areas, the county commission or a designated county department typically handles permit issuance. It is crucial to verify the specific jurisdiction and its requirements, as rules and fees can change. Missouri does not have a statewide building code; instead, local authorities having jurisdiction (AHJs) manage permit processes.

1. Authority Having Jurisdiction (AHJ)

The AHJ for building permits in Clark County, Missouri, varies. In incorporated cities and towns, the local municipal building department is the AHJ. For unincorporated areas of Clark County, the county commission or a county building department is responsible for permit review and issuance.

2. Rules for Properties in Unincorporated Areas

In unincorporated areas of Clark County, Missouri, the county commission may require building permits for the erection or construction of any building with a cost exceeding six hundred dollars. This requirement applies to lands outside the corporate limits of any incorporated city. The process involves filing an application with the county clerk, describing the land and proposed construction. A permit fee is typically required. Failure to secure a permit for such construction is a misdemeanor. However, these provisions may not apply if the county has adopted a planning and zoning commission. Additionally, township boards in unincorporated areas may have the power to regulate building, provided such powers are approved by a vote of the people. These regulations can cover building height, size, lot occupancy, yards, and the location and use of structures, with exceptions for agricultural and forestry purposes.

3. Permit Triggers for Demolition Work During a Remodel

Demolition of existing structures generally requires a building permit in Missouri. This includes the removal of attached or detached garages, shops, pools, decks, or patios. Before any demolition or excavation work begins, it is mandatory to contact Missouri One Call (1-800-344-7483 or 811) to locate underground utilities. This notification must be made at least two working days and no more than ten working days before commencing work. State regulations also require notification for asbestos renovation and demolition projects at least 10 working days before work begins.

4. Permit Requirements for Converting Non-Living Spaces

Converting non-living spaces such as garages, attics, or unfinished basements into habitable living areas typically requires a building permit. Depending on the scope of work, electrical, plumbing, or mechanical permits may also be necessary. Existing features in these spaces, like ceiling heights, windows, and insulation, must meet current building code requirements for finished living areas.

For all conversions, doors leading into the converted space must meet specific size requirements (at least 6'2" high and 30 inches wide), and egress windows must have a sill height of 44 inches or less.

Resources to Learn More

Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Missouri, including Clark County.

Missouri Remodeler Legislation, Codes, and Guidelines

Missouri State-Level Building Codes and Legislation for Remodelers and Residential Renovations

Missouri does not have a single, statewide building code. Instead, building codes are adopted and enforced at the local level by municipalities and counties. These local jurisdictions typically reference model codes from the International Code Council (ICC). The most commonly adopted versions of these codes in Missouri include the 2015 editions of the International Building Code (IBC), International Residential Code (IRC), International Existing Building Code (IEBC), International Plumbing Code (IPC), and International Mechanical Code (IMC). Some areas may also reference the 2009 International Energy Conservation Code (IECC) and the National Electrical Code (NEC), which are enforced locally. It is crucial for remodelers to verify the specific codes and any local amendments in effect with the local building department for their project's location. Some municipalities, like O'Fallon and Town and Country, have adopted the 2021 or 2024 editions of the International Existing Building Code, respectively.

The primary state board or agencies that set these standards are not centralized at the state level for building codes. Instead, the Division of Professional Registration supports various professional licensing boards and commissions responsible for regulating professions within the state. However, for building codes, enforcement and adoption are primarily handled by local building departments and officials.

Generally, the classification of remodels and when demolition guidelines apply are determined by local ordinances and the adopted building codes. The International Residential Code (IRC) and International Existing Building Code (IEBC) provide frameworks for alterations and repairs. Structural alterations, such as converting attics or basements to habitable spaces, typically require permits and are subject to more stringent requirements than cosmetic remodels. Demolition guidelines are also locally enforced and often require specific permits, advance notice to neighbors, and adherence to safety and debris removal protocols. For instance, some municipalities require a notice of intention to demolish to be sent to properties within 200 feet, and demolition must proceed continuously and be completed within a specified timeframe.

Missouri law broadly defines remodeling as any work that erects, demolishes, alters, or repairs improvements to a property. This includes kitchen and bathroom renovations, room additions, structural changes, and electrical, plumbing, and HVAC upgrades. For substantial renovations, Missouri statute defines it as modifications affecting at least fifty percent of the square footage of a building or costing at least fifty percent of the building's fair market value.

Resources to Learn More

Select a City in Clark County

If your project is located within incorporated city limits, you will likely need to follow municipal ordinances rather than county rules. Select your city below to view local regulations.

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