AUGUSTA — Efficiency Maine has extended a $1,000 “bonus” offer for Maine homeowners who weatherize their homes, according to a news release from the agency.

Maine homeowners may now qualify for up to $5,500 in combined cash incentives and federal tax credits. Homeowners and landlords of all income levels are encouraged to apply.

An energy audit is the first step toward installing insulation, air sealing and heating system upgrades and receiving a package of rebates and tax credits.

The bonus was initially announced in June. Originally, homeowners had to complete the work by Aug. 31. With the newly announced extension, customers need to sign up online at http://efficiencymaine.com by Aug. 31, complete an energy audit by Sept. 30 and complete the work by Dec. 31 to be eligible for the $1,000.

The program is funded by stimulus dollars through the American Recovery and Reinvestment Act.