Well,
this is interesting.
98.85% of homeowners filled out the empty tax declaration. The 1.15% who didn't (that's 2,132 homes) are about to be sent a tax notice that assumes that their property is vacant. There's still an appeal process if it's actually occupied, or any of the other clauses apply that mean the vacant property tax doesn't apply.
"A total of 8,481 residential properties were declared or deemed to be unoccupied/under-utilized for more than 180 days in 2017. This figure not only includes properties that were declared vacant, but also properties that claimed one of the various exemptions to the tax. Properties can be eligible for an exemption based on a number of reasons, including if the property was undergoing renovation or redevelopment, title transferred during the year, or the owner was residing in a hospital, long term or supportive care facility."
That means 6,349 homes were vacant, but an unstated number are exempt from paying the tax. There's a report coming in the fall that will have the final numbers.
This is way fewer vacant homes than either the census, or other estimates have previously suggested. It's quite possible that there are people who have a 'vacant or underutilized' home, but said it was occupied. They're not necessarily off the hook: "The Empty Homes Tax audit program is underway. Using a risk-based approach, as well as random audits, the program has a goal of verifying property status declarations and encouraging compliance with the new tax."