Police investigating suspicious fire that destroyed home at Carrara on the Gold Coast

A young mother and her three children are homeless tonight after a suspicious house fire on the Gold Coast.

The four weren't inside the Carrara home when it went up in flames, returning about an hour later to find it fully alight.

Police say they were called to an argument between the woman and her boyfriend just before the fire broke out.

Neighbour Barney Shirley told 9NEWS the woman "dropped to the floor and started crying" when she saw the home alight, before walking into the house and grabbing a bag of her stuff.

No one was found inside the home, which was almost completely destroyed.

While the cause of the fire is not yet known, it is being treated as suspicious.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000.