Well, It depends on a lot of factors including external weather conditions and property and quality of building materials used.
If you are particular about concrete, creep plays a major role. The amount and strength of steel reinforcement and concrete is also very important. The corrosion of steel reinforcements drastically reduces life span.
So without specifications, it would be hard to give an estimate for a life span.
But generally, the age is estimated as 65 to 70 years.
Types of structures and their life span:
- Historical structures (temples, etc) – 500-1000 yrs
- Steel structures – 100-150yrs
- Concrete structures – 100yrs
- Personal or commercial bldgs – 60-80yrs
- Rigid roads – 30-35yrs
- Flexible roads – 8-10yrs