Major home system lifespans: Roof 20-50 years depending on material, HVAC 15-20 years, water heater 8-12 years for tank and 20+ years for tankless, foundation indefinite with proper maintenance, electrical panel 25-40 years, plumbing 40-70 years for copper and 25-40 for PVC, appliances 8-15 years.
Lifespan Table
Roof: 20-50 yrs. HVAC: 15-20 yrs. Water Heater: 8-12 (tank) / 20+ (tankless). Foundation: Indefinite.
Factors That Affect Life
Climate, maintenance quality, initial installation quality, and frequency of use.
Maintenance to Extend Life
Regular servicing, timely repairs, and proper usage can add years to system life.
When to Plan Replacement
Start budgeting for replacement when systems reach 75% of expected lifespan.
Budgeting
Set aside 1-2% of home value annually for major system replacements and repairs.