PHOTO: Bob Ell told the government he will not commence residential development if they do not allocate a new hospital to his site 

Billionaire developer Bob Ell has declared he will stall a 4500-unit development in one of the most rapidly growing regions in NSW unless the government builds a new hospital on his site.

Mr Ell’s ultimatum to Premier Gladys Berejiklian and three senior ministers is squared at the most sensitive issue in the critical seat of Tweed at the coming election, which Labor has cast as a referendum on the location of the hospital.

The government controversially decided last year to replace the ageing hospital at Tweed Heads with a greenfields development on state significant farmland, while Labor candidate Craig Elliot says he would have the facility built on a block owned by Mr Ell that was rejected by Health Infrastructure.