List only what matters
Roof type, heating/cooling equipment, water heater, sump pump, major appliances, exterior finishes and safety devices are common examples.
Record age when known
Unknown is better than invented.
Attach the next action
Each component should have a next review, service or replacement-planning trigger.
Update after renovations
The inventory should change when the house changes.
Safety boundary. This site is for planning, observation and records. Do not improvise electrical, fuel-burning, structural, roof-height or other hazardous work. Follow manufacturer instructions, applicable codes and qualified professional guidance.