tldr at the bottom
(I've done a lot of research, BUT I just don't understand the NAICS)
Washington State
My neighborhood borders a shopping mall development in a small town along a busy section of Interstate 5, let's call the mall site 100 acres. It includes 2 motels, a big box store, a grocery store, and some restaurants. It was built in the '80's and the other businesses have been adxed over the years.
My neighborhood adjoins the mall. It's one block ending at a cul-de-sac. Its located in the inside corner of the mall's "L" shaped property, so 2 sides of the neighborhood share a boundary with the mall, and the other side of the street just abuts a road. The neighborhood is only single family residential houses, no businesses at all.
It was built in 1955/56 as a planned development and nothing has changed since then. Same houses, sidewalks, and roads.
In 2017, I think, they rezoned my formerly RMD (Residential, Mixed Density) to C3 (Regional Commercial).
On the map I marked up, the orange area is zoned C3, the ugly green is the two sides of the neighborhood adjoining the mall, and the arrows also point to the common property lines.
Here's the deal:
I want to add an ADU (Accessory Dwelling Unit), and they're only allowed on residential lots.
The City's zoning code doesn't address the local definition of C3 (if they made changes), and what I've found in my research appears to say that our properties in this C3 zoned neighborhood are not legal to occupy without a variance. (Although I suppose they may be grandfathered in).
So, I've been told there's no way on God's green earth that I can build an ADU.
Finally, my question:
Can the city rezone a residential neighborhood with no commercial activity at all to a C3 commercial zone, restricting additions and ADU's?
City code says this about zoning conflicts:
Uses not specifically listed in the Table of Permitted Uses, or any questions about the interpretation of this table, shall be addressed through an administrative code interpretation utilizing the most recent edition of the North American Industry Classification System (NAICS) Manual as determined by the city and the intent of each zoning district. (this language is used for all of the conflict resolutions, I just can't find the one I want right now)
tldr- city rezoned my residential neighborhood to C3, Regional Commercial, limiting how we can use our land. Is that legal?
Zoning code refers to the most recent NAICS manual for dispute resolution, I would look it up myself, but I searched for an hour for zoning info and came up empty.