Santa Cruz, CA: Climate Zone, Risk and Window Requirements
Santa Cruz sits in IECC climate zone 3C, which sets the energy-performance bar for any window installed here. Below that, a short list of Santa Cruz's longest-licensed window contractors can turn a spec into an actual installed window.
Licenses checked · California Contractors State License Board
3CIECC climate zone · ENERGY STAR South-Central zone
Santa Cruz's climate zone, in plain terms
Santa Cruz County's normal precipitation runs about 30.6 inches a year, with 0.0 inches of snow, which is a separate question from energy performance but still shapes which window details matter in Santa Cruz.
Moisture and glass performance are handled by different parts of a window's spec sheet, and a Santa Cruz buyer benefits from checking both instead of assuming one implies the other.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 2.2 mi away.
What FEMA's risk data says about Santa Cruz
FEMA scores Santa Cruz County's winter-weather risk as Relatively Low and its flood risk as Relatively High.
Winter risk in Santa Cruz weighs on U-factor and condensation resistance; flood risk weighs more on sill height and drainage detailing than on the glass package.
Treat these as two separate conversations with a Santa Cruz contractor, not one.
- Strong wind
- Very Low
- Winter weather
- Relatively Low
Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).
Guides to finish before Santa Cruz window bids come in
- How to Read an NFRC Window Label Four numbers on one sticker decide most of a window's real-world performance. Here's what each one means.
- ENERGY STAR Window Criteria by Climate Zone ENERGY STAR splits the country into four zones, each with its own numbers. Here they are, and why the Northern zone works backward from the other three.
- Impact Windows vs. Shutters in Florida's Hurricane Zones Florida gives homeowners two paths to a protected opening. Here's how each one is tested, and where the HVHZ raises the bar further.
Santa Cruz's longest-licensed window installers
Oldest license first, newest last, pulled directly from the state's file. This list isn't for sale.
- A & B Construction ServicesVerify license
- Lighthouse Windows INCVerify license
- Doors Windows And MoreVerify license
- Showcase Shower Door CompanyVerify license
- Skylight Window & Door SolutionsVerify license
- Lume GlassworksVerify license