The scheme that will remain operative till January 31 next year, was earlier approved by the Standing Committee of the South Delhi Municipal Corporation.
Mayor Kamaljeet Sehrawat asked the property owners in unauthorised colonies to come forward and avail the scheme, the civic body said in a statement.
The scheme to provide substantial relief to the residential property tax assesses in unauthorised colonies along with urbanised villages and rural villages was earlier approved by the standing committee's chairman, Bhupender Gupta, the SDMC said.
He said the scheme will include the owners of all such properties, who have not submitted the tax return from April 1, 2004, or not submitted return on regular basis or the owners whose assessment has not been done from 2004 and ahead.
"Further all residential properties in unauthorised colonies where the matter is pending before MTT or other courts will also get benefit under the scheme," Gupta was quoted as saying in the SDMC statement.