Building codes

The City of Louisville has adopted the 2024 International Code Council (ICC) Codes, along with local amendments and additional building regulations, to establish minimum standards for safe, sustainable, and resilient construction. These codes govern the design, construction, maintenance, and energy efficiency of buildings throughout the city. The 2024 ICC Codes became effective on December 6, 2025.

View the 2024 ICC Code Adoption Ordinance here:
[2024 ICC Code Adoption Ordinance]

Applicable building codes

Code	Description
2024 International Code Council (ICC) Codes (Effective 12/6/25) 2024 IBC, IRC, IECC, IFC, IPC, IFGC, IMC, IEBC, IPMC Get Free Access to These Codes	Provides the City's adopted building, residential, fire, mechanical, plumbing, fuel gas, energy conservation, existing building, and property maintenance codes.
1997 Uniform Code for the Abatement of Danerous Buildings (Effective 12/6/25)	Establishes procedures for identifying, repairing, or removing buildings that pose a danger to public health and safety.
1997 Uniform Housing Code (Effective 12/6/25)	Sets minimum standards for the maintenance, occupancy, and safety of residential housing.
Colorado Model Electric Ready and Solar Ready Code (Effective 12/6/25)	Promotes new construction that is prepared for future electric appliances, electric vehicle charging, and solar energy systems.
Louisville Fire Hardening Code Effective 12/10/24 Updated March 4, 2025 Emergency ordinance passed January 21, 2026	Requires fire-resistant building materials and construction methods to improve resilience against wildfire hazards.
Louisville Municipal Code – Chapter 15: Buildings and Construction	Contains Louisville's local building regulations, permit requirements, and amendments to adopted building codes.
Residential Energy Services Network (RESNET)	Provides Home Energy Rating System (HERS) standards used to verify residential energy efficiency compliance.

Local code amendments & requirements

2023 National Electrical Code (NEC)

Establishes minimum safety standards for electrical wiring, equipment, and installations.

NEC 2023 – Section 210.8(F), Exception #2

Requires GFCI protection for all new outdoor air conditioning units within the City of Louisville.

Free code access

You can access ICC codes online here.

Marshall Fire rebuild design criteria

For eligible Marshall Fire rebuilds:

Design Criteria / Prescriptive Energy Code
Only for original owners

Department

Sustainability

Through inclusive and community-driven action, we strive to reduce greenhouse gas emissions, strengthen climate resilience, protect natural resources, support a vibrant local economy, and create equitable opportunities for all who live, work, and visit here.

Resource

Economic Vitality

Programs and resources that support local businesses, attract investment, and strengthen the community’s economic growth.

Permit

Building Permits

Building Permit page with all information about how to get a permit.

Building Safety

Phone: (303) 335-4584
Email Building Safety
Our address:
City Hall, First Floor
749 Main St
Louisville, CO 80027
Our office hours:
Monday-Thursday: 8 a.m.–4 p.m.
Friday: By appointment

Website feedback