Thurston County, WA Parking Rules: Driveway Rules (2026)

050 of the zoning code, the Development Standards for off-street parking, sets the physical rules for every driveway and parking area built under Thurston County's zoning title. Subsection E requires that "all parking areas and driveways for more than four vehicles" be surfaced with asphalt, concrete, permeable paving, or similar pavement, built durable and dust-free, and graded and drained so surface water is properly disposed of, in conformance with the county's Drainage Design and Erosion Control Manual. 05 TCC, the county's stormwater standards chapter, into every parking and driveway project.

Subsection A gives the county engineer authority over where a driveway's ingress and egress points sit, including the power to require access from a side street instead of a front street when one is available, and to alter existing access later if traffic safety requires it. Subsection B bars "backing out" driveway designs entirely for commercial and industrial developments and for any residential building with five or more dwelling units: those parking areas must be arranged so a vehicle never has to back out into a public street or right-of-way.

Maneuvering aisle and parking stall dimensions for the paved area are pinned to Tables 21T-18 through 21T-20 under subsection C. None of this reaches driveways serving four or fewer vehicles, the typical single-family case, which is why gravel driveways survive on smaller residential lots even though the county requires hard surfacing everywhere above that threshold.