Riverside has been on the National Register of Historic Places since 1985, and the city has also designated Riverside and Avondale as a local historic district. The local designation is the one that matters day to day. City rules require a Certificate of Appropriateness (COA) for work on the outside of a building, and for site work such as fences, driveways and sheds. Interior work that does not touch windows or exterior doors usually does not need one.
City staff handle smaller requests, which take about a week or two. Requests such as demolishing a contributing building, new construction or a two-story addition go to the Jacksonville Historic Preservation Commission, which meets once a month, so those take at least a month. If work started without a COA, the application fee for after-the-fact review is doubled. Riverside Avondale Preservation is a nonprofit neighborhood group, not a city office, and it does not make the final decision. When you sell as-is, any future COA work becomes the next owner’s job.