Police are investigating a deliberately lit house fire at Brighton overnight.

Emergency services were called to the fire on Brighton Road about 8pm yesterday, arriving to find the structure fully engulfed.

Fire investigators have determined it was deliberately lit, and police are investigating.

Police would like to speak to anyone who may have witnessed the incident or who has dash cam footage from Brighton Road, between the Brighton roundabout and the United service station, between 7:45pm and 8:45pm yesterday.

Anyone with information is asked to contact Bridgewater Police on 131 444 or Crime Stoppers Tasmania on 1800 333 000 or at crimestopperstas.com.au.

Information can be provided anonymously.