A landmark $1.3 billion native title deal across Western Australia's south west is expected to proceed after all six claimant groups involved voted in its favour.

The West Australian Government and the South West Aboriginal Land and Sea Council (SWLSC) ended formal negotiations on the deal in November, described as one of Australia's most comprehensive.

The council, which represented the claimant groups in the negotiations, agreed to a benefits package worth more than $1.3 billion.

The Noongar community then had to consider the agreement at authorisation meetings between January and March.

All of the groups have now voted in favour of the deal with the last ballot held on Saturday night.

The council's chief executive Glen Kelly said he expected benefits to start flowing from next year.

"We've got a little bit of work to do on the legal side but hopefully we'll be able to get all of that finished by the end of the year, so that can start flowing," he said.

"We're really looking forward to its implementation because we think there's great empowerment in there for the Noongar people and great prosperity to be had."

Cultural programs investment priority

Under the proposed settlement, native title over the south-west of the state would be exchanged for the formal recognition of the Noongar people as the traditional owners of Noongar country, land, funds and investments.

Annual payments of $50 million would be made into a Noongar Future Fund over 12 years.

About 320,000 hectares of land would also be handed over to Noongar ownership.

Mr Kelly said six new Indigenous corporate bodies will be established to make sure the funds flow to their region to support cultural programs.

"Initially the priorities will be around language and culture, things like language and connection to country, so it will have a massive and revitalising affect on Noongar people and culture and the corporations will be the conduit for that," he said.

"It's really very exciting, the agreement when it starts will usher in a new time of prosperity for Noongar people, we're really looking forward to it."

Opponents claim deal selling off heritage

The negotiations have at times turned bitter, with some opponents of the deal accusing those in favour of selling their heritage and culture to the Government for cash.

Herbert Kenneth Bropho opposes the deal and claimed Saturday's vote was rigged.

"SWALSC has been doing a bodgie deal for the 'yes' vote," he said.

"SWALSC was picking and choosing the family members that were allowed in the meeting, they had a bus load of people going to the meeting who was the 'yes' vote.

"SWALSC and the Government need to be fair and go back into the voting poll again."

Mr Bropho said the deal would increase homelessness among Noongar people.

"You'll have a lot of homeless people, you'll have people in the streets, you'll have a lot of homeless people in the country areas living on the outskirts of the city areas and the ditches," he said.

"A lot of people are starting to move to the city from the country and filling up Perth's parks."

In 2012, protesters against the settlement established a tent embassy at Perth's Heirisson Island and were moved on by police.

The State Government was contacted for comment.