The city manager wants the government to close a loophole which means owners of newly built homes are exempt from property tax.
Homeowners pay property tax based on an evaluation recorded in 2013.
People who bought new builds since then don't have to pay the levy, because the property didn't exist at the time of the valuation.
They're not due to be hit with a bill until October 2019 but the city manager wants the government to change that.
According to the Irish Times, Owen Keegan has said in a report on the local authority's 2018 budget, that the "inequity must be removed".
80% of the Local Property Tax is ring-fenced for services, while 20% is handed over to a central fund for poorer and more rural parts of the country.
Dublin City Council says the exemption means it's losing out on €15m which could be used to deliver services and tackle the homeless crisis.