Home Inspection Checklist Score Calculator
Rate each home inspection category from 0 (Poor) to 10 (Excellent). The calculator computes a weighted overall score and provides a condition rating for the property.
Formula
Weighted Score (0–10):
WeightedScore = Σ (Scorei × Weighti)
Final Score (0–100):
FinalScore = WeightedScore × 10
Category Weights:
- Foundation & Structure: 18%
- Roof & Attic: 15%
- Electrical System: 13%
- Plumbing System: 12%
- HVAC System: 10%
- Exterior & Drainage: 8%
- Interior Walls/Floors/Ceilings: 8%
- Windows & Doors: 6%
- Insulation & Ventilation: 5%
- Safety Features: 5%
Condition Ratings: 85–100 = Excellent | 70–84 = Good | 55–69 = Fair | 40–54 = Poor | 0–39 = Critical
Assumptions & References
- Scores are subjective ratings assigned by a licensed home inspector or buyer on a 0–10 scale per category.
- Weights reflect relative importance based on ASHI (American Society of Home Inspectors) standards, which prioritize structural integrity and safety-critical systems.
- Foundation and structural issues carry the highest weight (18%) as they are the most costly and difficult to remediate.
- Roof defects are weighted at 15% due to their direct impact on water intrusion and long-term property integrity.
- Electrical (13%) and plumbing (12%) are weighted heavily due to safety and habitability concerns.
- Safety features (smoke/CO detectors, railings) are weighted at 5% as they are typically low-cost to remediate but critical for occupant safety.
- This calculator is intended as a decision-support tool and does not replace a professional home inspection report.
- Reference: ASHI Standards of Practice (ashi.org); HUD Housing Quality Standards; InterNACHI Inspection Standards.