Spending by the WA Liberal Party and teal independent Kate Chaney has reached unprecedented levels in the battle for the prized seat of Curtin, with millions of dollars being poured into campaigning across Perth’s most affluent coastal suburbs.

Climate 200 has tipped more than $200,000 into Curtin in less than a month as the daughter of Perth business icon Michael Chaney fights to hold on to the once-safe Liberal seat she turned teal at the last election.