The work safety watchdog revisited 15 residential construction sites after a crackdown this month resulted in more than 50 safety notices handed out.

On Wednesday, inspectors issued one infringement notice, nine prohibition notices and 21 improvement notices as part of Operation Safe Prospect.

Work Health and Safety Commissioner Jacqueline Agius was pleased by the improvement in compliance.

"We are glad to see a reduction in the number of notices issued at residential construction sites in Throsby this time, but there is still more work to be done to improve WHS standards," she said.

On November 4, 12 prohibition notices were issued as well as four infringement notices and 42 improvement notices

Ms Agius said safety needed to take priority after seeing a worker performing high-risk work on a roof without any safety equipment.

"We continue to see safety risks at residential construction sites, which can lead to death or serious injury; in the photo below, the worker is performing high risk work without any fall protection or edge protection in place," she said.

Ms Agius said inspectors would continue to attend worksites across Canberra as part of Operation Safe Prospect.

"Safety must come first so that every worker can make it home safely at the end of their shift," she said.

"Through Operation Safe Prospect we will continue visiting and re-visiting greenfield sites in the Territory, to make sure that workers WHS obligations are complied with."