The protest group said one of their members was taken to Kawakawa police station in handcuffs but later released without charge.
Locals want the land returned to council ownership and protected as a reserve while hapū say it is subject to a Treaty claim.
The long-running protest started in October 2020 but had been quiet since late 2022.
At a public meeting in June, the landowner offered to reduce the number of homes to 13 from the original 17, and to preserve the top of the hill as a lookout.
Protests resumed when vegetation clearance began earlier this month before hapū had met to discuss the offer.