Fire services were called to a fire on 78 Farquhars Rd at 9.30pm Monday.
A spokesman for the Fire Service said the fire was suspicious. The house had been vacant for about a week.
No one was injured in the fire, which had been extinguished by 10pm.
A neighbouring resident said it was no surprise the fire took place at the address as the property was "a mess".
Police guarded the scene overnight.