Washington law on a lot: Accessory dwellings (HB 1337, 2023).
A Washington lot sheet on ParcelSheet shows the FEMA flood zone, wetlands, wildfire hazard, faults, septic soil rating, slope and 3 ft sea level rise for any address, each with its public source, and points to the zoning office. Lot lines and parcel numbers come from the Washington statewide parcel map. Free to start.
Updated
| Layer | Official source |
|---|---|
| Flood zone | FEMA National Flood Hazard Layer |
| Wetlands | US Fish and Wildlife Service, National Wetlands Inventory |
| Wildfire hazard | USDA Forest Service, Wildfire Hazard Potential |
| Faults | USGS Quaternary Fault and Fold Database |
| Soil for septic | USDA NRCS Soil Survey (SSURGO), septic absorption field rating |
| Slope and elevation | USGS 3DEP elevation |
| Sea level rise, 3 ft | NOAA Office for Coastal Management, sea level rise viewer |
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Washington laws on a lot: Accessory dwellings (HB 1337, 2023), Critical areas.
A Washington lot sheet on ParcelSheet shows the FEMA flood zone, wetlands, wildfire hazard, faults, septic soil rating, slope and 3 ft sea level rise for any address, each with its public source, and points to the zoning office. Lot lines and parcel numbers come from the Washington statewide parcel map. Free to start.
The city or county planning office where the lot sits decides what can be built on it. ParcelSheet points to that office and to the 2 Washington state laws that limit what it may require, each with its source.
Yes. A lot sheet is free to start, with no account.
Every rule and hazard on the lot, sorted Flagged, Caution and Clear, each with its source and date.
Guides: How it works · All Washington counties · All 50 states · Questions
Public records and maps with sources. Not legal advice, a survey, or a permit. Confirm with the town or county planning office. By using ParcelSheet you agree to the Terms of Use. Privacy.