Oregon, Grant County HVAC Permit Regulations and County Ordinances for Unincorporated Areas

Grant County HVAC Permit Requirements

Grant County, Oregon, requires building permits for all new construction and structural alterations within its unincorporated areas. This includes HVAC installations, replacements, or alterations. The county's Planning & Development Department is responsible for issuing these permits. While Oregon has statewide mechanical permit standards, local jurisdictions like Grant County handle the actual permit issuance and inspections. HVAC projects, even seemingly minor ones like replacing a furnace, generally require a permit and subsequent inspection to ensure compliance with the Oregon Mechanical Specialty Code (OMSC) and other relevant codes. Exemptions are limited, and most work involving refrigerant, venting, or significant electrical or plumbing connections will necessitate a permit.

Jurisdiction and Unincorporated Areas

Grant County's Building & Safety jurisdiction, managed by the Planning & Development Department, specifically covers properties located in unincorporated areas of the county. If a property is within an incorporated city, that city's building department is responsible for permit issuance, not the county. For those in unincorporated areas, a building permit is mandatory for any new construction or structural modifications, including HVAC work.

Application Process and Requirements

Contact: Begin by contacting the Grant County Planning & Development Department at 541-575-1519 for pre-permit consultation.
Land Use Review: Verify if your project requires any land use review or other local approvals.
Application Forms: Obtain permit application forms from BuildingPermits.Oregon.gov or in person at the county courthouse.
Project Details: Provide a complete property description, owner information, project scope, and detailed construction plans.
Plan Submission: Submit applications and required documents online via BuildingPermits.Oregon.gov or in person. The county will review plans for compliance with the Oregon Residential Specialty Code (ORSC) and Oregon Structural Specialty Code (OSSC).
Permit Issuance: Once approved, the permit will be issued. It is valid for construction to begin within 180 days of issuance.
Inspections: Schedule inspections by appointment by calling 541-575-1519. Inspections are typically conducted every Tuesday. All required inspections (e.g., foundation, framing, electrical, plumbing, final) must be passed for final approval.
Contractor Licensing: All contractors must hold a current Oregon Construction Contractors Board (CCB) license. For systems with refrigerant, an EPA Section 608 certification is also required.

Resources to Learn More

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

Oregon Hvac Legislation, Codes, and Guidelines

Oregon HVAC Building Codes and Legislation

Oregon regulates heating, ventilation, and air conditioning (HVAC) systems through a series of state-specific specialty codes. These codes are updated periodically to incorporate modern standards, energy efficiency requirements, and safety protocols. As of April 2026, the primary codes governing mechanical systems in the state include the 2025 Oregon Mechanical Specialty Code (OMSC) and the 2023 Oregon Residential Specialty Code (ORSC).

The 2025 OMSC, which became mandatory on April 1, 2026, is based on the 2024 editions of the International Mechanical Code (IMC) and the International Fuel Gas Code (IFGC), with specific Oregon amendments. For residential construction, the 2023 ORSC provides the governing standards. Recent legislative and regulatory updates have introduced significant changes, including new requirements for heat pumps in certain new residential construction projects where split-system air conditioning is installed, aimed at improving energy efficiency and reducing long-term utility costs for homeowners.

Primary Regulatory Agencies

The administration and adoption of these building codes are managed by the following state entities:

Oregon Building Codes Division (BCD): A division within the Department of Consumer and Business Services, the BCD is the primary agency responsible for adopting, administering, and enforcing the state's specialty codes, including the mechanical and residential codes.
Residential and Manufactured Structures Board (RMSB): This board works with the BCD to review and approve updates to residential building codes, including recent measures regarding energy-efficient HVAC and heat pump mandates.
Mechanical Board: This board collaborates with the BCD to adopt and administer the Oregon Mechanical Specialty Code.
Construction Contractors Board (CCB): While the BCD sets the technical standards, the CCB is responsible for issuing specialty contracting licenses for HVAC work in the state.

Resources to Learn More

Select a City in Grant 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.

Help Us Improve This Guide

Did you find a dead link, or do you have the direct link to the Grant County permit application portal? Help us keep this information accurate by submitting an update.