Let's Get Wellington Moving is expecting outside experts’ fees will soar to $60 million in the coming year.

LGWM has already spent $38.5m on external consultants in the past three years and $35m this year, all going towards their forecast price tag of $7.4 billion.

The plan features tunnels, light rail, bike and bus lanes, footpath changes, and speed limit alterations.

Wellington regional councillor Thomas Nash told Heather du Plessis-Allan that the city's been waiting for this for a long time.

He says a public transport system major revamp is overdue, and if they're going to spend $7.4 billion they need to do it right.

LISTEN ABOVE