A developer has been given the green light to demolish three historic buildings in Brisbane’s CBD and put a temporary dog park on the site.

Three heritage buildings in Brisbane’s CBD have gone to the dogs.

But only temporarily.

A developer has been given the green light to demolish the historic brick buildings and replace them with a temporary dog park.

While the buildings aren’t heritage-listed, two are more than 100 years old.

The development approval has outraged Brisbane Heritage, the group that started an online campaign in a bid to save the Margaret Street architecture.

“It’s a dog of an idea,” Brisbane Heritage spokesman John Macdonald told AAP.

“We’re not against the development of the site, but want to see the buildings integrated into any future plans.

“They could easily be incredible, beautiful buildings.”

Millionaire mogul Sam Chong and his son Paul lodged the demolition application with Brisbane City Council in mid-December.

The application attracted 122 submissions and a 1300-signature petition, while over 900 emails were sent to the Lord Mayor in protest.

But the campaign to prevent 100 years of history from becoming a dog park was short-lived.

Brisbane City Council this week approved the demolition, but says the green pocket isn’t a “dog park” despite it including a water basin and refuse bin for canines.

The development that will eventually replace the dog park is a work in progress.

Architect Noel Robinson says plans are being developed for a 300-room five star hotel and about 500 apartments over 60 levels.

His firm says the buildings must be removed as they’re laden with asbestos and homeless people are risking their lives by trespassing on the site.

But Mr Macdonald says campaigners will keep fighting to save them.

“We are not giving up,” he said.

“We will now focus on the developers to hopefully get them to change their mind.”