A delay in the bushfire clean-up process has "frustrated" some residents.
Wollondilly Shire Council local recovery coordinator Ally Dench spoke about the clean-up at a hearing for the Royal Commission into National Natural Disaster Arrangements last week.
Ms Dench said clean-up crews had faced challenges following the Green Wattle Creek bushfire.
"The sheer size of the clean-up across the state has been one of the major issues," Ms Dench said.
"[Wollondilly Shire] Council also managed very significant tree clean-up operations in the bushfire-affected area."
"Trees are becoming one of the biggest issues," she said.
"There are some issues in relation to trees on private property and the role of council cleaning those up as well as issues in the public realm.
"Council's tree experts made themselves available to inspect fire-damaged trees on private property and helped to determine if removal was required."
Ms Dench said several organisations were responsible for the bushfire clean-up.
"The general public looks to council for the clean-up, however it's not just the sole responsibility of council," she said.
"We implemented a bushfire waste drop-off for fire-affected residents at our Bargo waste management centre.
"We actually opened that up to Wingecarribee residents as well because [the Green Wattle Creek bushfire] straddled across the two areas.
"We've worked collaboratively with Laing O'Rourke, the state government's appointed contractor, to undertake post-fire clean-up."