Adopted edition
Coverage in progress
Inherits from WA state floor.
WA · County
Mason County, WA.
Mason County is a coastal WA jurisdiction — design wind 115 mph.
Design wind speed
115 mph
ASCE 7 Risk Cat II, 3-second gust at 33 ft. Drives fastener spacing, hold-downs, and opening protection.
Climate zone (IECC)
4C
Drives R-value, fenestration U-factor, and air-leakage envelope rules.
Special zones
- HVHZ
- WBDR
- WUI
- FEMA SFHA possible
Permit office
Mason County County Building Department
Common amendments + overlays
What's specific to this county.
- §01 Coastal flood-zone overlays (FEMA AE/VE).
- §02 WUI overlay — fire-resistant exterior + defensible space requirements.
Working in Mason County?
Pull an address-level code packet for any property in Mason County. SkyCanvass resolves the parcel, looks up the adopted edition + the Mason County-specific amendments listed above, and emits a cited packet ready for permit submittal.
See the Washington state overview for the broader context, or browse the state directory.
Pull a Mason County code packet.
Free to start — property lookups, state code access, the hail map, and your first storm report on us. No credit card required to look up an address.