The incident happened yesterday when the roof of the second floor collapsed allegedly due to sub-standard material used in the construction, police said.
While people in the area the locals pulled out the bodies of the two labourers from the rubble, they managed to rescue the third labourer trapped under the debris.
Shrawan received serious injuries and was admitted in a hospital, where his condition is stated to be stable, they said.
The deceased were identified as Ram Chander (45) and Bijender Singh (32), both residents of Moth Karnail village in Hisar district.
