WA AHJ
Solar permit requirements in Seattle, WA
Solar installation projects in Seattle, King County, must adhere to specific structural design criteria. These standards ensure that all residential and commercial solar systems meet local safety regulations.
Requirements at a glance
- Design wind speed
- 100 mph (ASCE)
- Exposure category
- B
- Ground snow load
- 0 psf
What Seattle expects on a solar permit
The jurisdiction requires solar designs to account for a wind speed of 100 mph and exposure category B. The ground snow load requirement for this area is 0 psf.
Design a permit-ready Seattle planset with these rules baked in.
Solar Design Lab derives the SLD, electrical, and structural live as you draw, and checks your design against the AHJ's requirements before you submit. First planset free.