Carnation streets, storm rules, and permits
Carnation’s Street and Storm Sewer System Standards cover both the street and the lot. Chapter 1, section 6 requires a right-of-way or street use permit from the Public Works Director before any work inside the road corridor, under Carnation Municipal Code 15.56.250, and Chapter 2 requires a right-of-way permit for every road and sidewalk cut. The same section sets a drainage permit once the new and replaced impervious surface on a site adds up to 2,000 square feet, and it excludes single-family residential development from that permit. Chapter 3 says the city has no stormwater conveyance network able to accept runoff from areas outside its existing tributary areas, so each site must handle its own runoff.
Walls follow the state residential code, which exempts a retaining wall no more than four feet high, measured from the footing’s bottom to the wall’s crest, so long as no surcharge bears on it. The road standards add a separate limit for rock-faced walls that hold up a road embankment: four feet above the keyway where the soil is stable, with an engineer’s design above that height.
Nearby, we also build in Snoqualmie, Duvall, Fall City, and Monroe, and we serve the rest of western Washington.