Prime Minister Julia Gillard has spent almost $10,000 removing a storm-damaged tree at The Lodge and possum-proofing Kirribilli House.

A Senate estimates committee on Tuesday heard there had been some "relatively minor works" on both houses in recent months.

The work included removing a storm-damaged tree at the prime minister's official Canberra residence, costing $8200, and putting possum collars on a camphor laurel tree at her Sydney home at a cost of $1,560.

- AAP