In a bit of a pickle...anyone knowledgable please advise!

[Debbie C.]

We have an old house that my husband and I have lived in for a long time. When we purchased this house decades ago, it was apparently assessed as a 2 bedroom house. But the previous owner had made some additions to the house and an extra bedroom and bathroom were added apparently without obtaining a permit. We never officially notified the city about these additions. We've recently made a few renovations for the house and obtained permits for them from the city. But now, the city is telling us they need to reassess the house because of the renovations. They gave us a survey to fill out asking about all the new additions/alterations that we've made to the house though these renovations.

In this circumstance, is it best to notify the city about the bedroom/bathroom additions that were made by the previous owner? Or do you think this isn't necessary, since these additions were done decades ago and by the previous owner? Any advice would be greatly appreciated!