The father, a serving police officer, survived the blaze after being unable to rescue his wife and children despite desperate attempts.
Emergency services were called around 3 am, and the fire caused extensive damage, including the collapse of the roof, ceilings, and stairs.
The bodies of the mother, in her 40s, and one child have been recovered.
Police are not treating the incident as suspicious, believing it to be a tragic accident, and investigations into the fire's cause, which is thought to have started on the ground floor, are ongoing.