Fee for adding bedrooms?

Un-friggin' believable. This Public Works person at the city told our architect today that this mysterious $1157.13 "developmental impact fee" was for adding bedrooms, which we're not doing.

Think he'd bother to check the city records? Nope, he's using realquest.com, which indeed does list our house as a 2BR. He said people add on without permits all the time and that it's up to us to provide documentation that the house already had 5BR and that the developmental impact fee had already been paid. Never mind that this "developmental impact fee" doesn't appear in the city's fee schedule, or that previous permitted work we've done clearly indicates more than 2 bedrooms.