1. The house has poor drainage.
2. The house has faulty wiring.
3. The roof leaks.
4. The house has an unsafe heating system.
5. The whole house has been poorly maintained.
6. The house has minor structural damage.
7. The house has plumbing problems.
8. The house’s exterior lets in water and air around windows and doors.
9. The house is inadequately ventilated.
10. The house has an environmental hazard.
According to MSN Real Estate