It's taken nearly 50 years, but a state is vowing to make new homes a reality via a more efficient planning system, with advocates urging authorities to seize momentum behind the "significant" changes.

Councils in NSW will get only 10 days to dispute small variations of development applications that normally take months to be processed.

An alternative approval body panel will also be made permanent, while 16-year-old regional planning panels will be scrapped.

Premier Chris Minns touted the ambitious overhaul as the biggest reform to planning and housing in the state's history.

His planning minister said it was time for NSW to stop "sweating the small stuff" and assure projects don't get stuck in the system.

"It's a necessary reset of the way the planning system and its pathways work .

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