Lakewood, CO Frost Depth & Snow Load: Building Design Criteria (2026)
Key Facts
- Seismic design category, residential
- B
- Seismic, commercial
- Calculated per Chapter 16, IBC
- Wind exposure
- Exposure C
- Wind banding
- Split at the 10,000 West block of Kipling, not by elevation
- Codes enforced
- 2021 IBC, IRC, IPC, IMC, IFGC, IECC, IEBC, IFC, ISPSC and the 2023 NEC
- Local amendments
- Lakewood Municipal Code, Title 14
Summary
Lakewood's design loads set residential seismic category B, Exposure C, and a wind speed that changes at a street boundary, the 10,000 West block of Kipling, rather than by elevation.
CITY OF LAKEWOOD ADOPTED BUILDING CODES — 2021 International Building Code; 2021 International Residential Code; 2021 International Plumbing Code; 2021 International Mechanical Code; 2021 International Fuel Gas Code; 2021 International Energy Conservation Code; 2021 International Existing Building Code; 2021 International Fire Code; 2021 International Swimming Pool and Spa Code; 2023 National Electrical Code. Wind Design: East of 10,000 West Block (Kipling) / West of 10,000 West Block (Kipling). Wind Exposure: Exposure 'C'. Seismic Design Category: Residential: B. Commercial: Calculated per Chapter 16, IBC.
Full Breakdown
Lakewood's Codes and Loads handout is unusual in how it bands wind. Rather than splitting by elevation, as mountain-adjacent Colorado jurisdictions typically do, it divides the city at the 10,000 West block of Kipling: east of that line the ultimate design wind speed is 155 mph for Risk Category I, rising through 166 and 178 mph for higher risk categories, and west of it the figures are higher again. Wind exposure is Exposure C on both sides. The seismic design category is B for residential work, while commercial work is calculated per Chapter 16 of the IBC rather than assigned a fixed category. The city enforces the 2021 I-Codes across the board, building, residential, plumbing, mechanical, fuel gas, energy, existing building, fire, and swimming pool and spa, together with the 2023 National Electrical Code, with local amendments held separately in Title 14 of the municipal code.
Violations & Fines
These are design inputs enforced at plan review rather than offences in themselves. The wind banding is the entry that most often goes wrong, because the boundary is a street block rather than a contour line, so a site near Kipling needs its side of that line established rather than assumed.
Frequently Asked Questions
What seismic design category applies in Lakewood?
How does Lakewood band wind speed?
Which codes does Lakewood enforce?
Sources & Official References
Other rules in Lakewood
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