Security Survey Score Calculator
Physical security assessment scoring by category.
About this calculator
This calculator turns a physical security walkthrough into a composite 0-100 security rating. You rate eight categories — perimeter, doors, windows, lighting, lock quality, alarm, cameras, and access control — each on a 0-10 scale, and the calculator applies fixed weights before averaging: lock quality (22) and doors (20) carry roughly twice the weight of lighting, perimeter, alarm, cameras, or access control, reflecting that a locksmith-focused survey should treat the barrier and locking hardware itself as the most consequential factors. The weighted average is scaled to a 0-100 score and mapped to a five-tier risk level (85+ excellent, 70+ good, 50+ fair, 30+ poor, below 30 critical). Any category scoring below 4 counts as a critical vulnerability, and the single lowest-scoring category is flagged as the weakest link to prioritize first.
Estimated remediation cost is built bottom-up: each deficient category below its own threshold (6 for physical/lighting categories, 4 for alarm/camera/access-control) contributes a per-point cost that's higher for categories that are typically more expensive to fix, like perimeter fencing or camera systems. A potential insurance discount is also estimated, stepping up from 0% below a 40 score to 15% at 80+, since insurers commonly offer premium reductions for demonstrably hardened properties. The category weights and remediation unit costs are built-in rules of thumb, not a formal insurance or code-compliance standard, so use the score to prioritize work rather than as a certified security rating.
Inputs
Results
Overall security score
44.8
How to Use This Calculator
- Walk the property and assess each security category: perimeter, doors, windows, lighting, lock quality, alarm, cameras, and access control.
- Enter a score from 0-10 for each category based on observed condition and effectiveness (categories are pre-weighted internally, with lock quality and doors weighted highest).
- Review the overall security score out of 100 along with the risk level and the weakest-scoring category.
- Check the critical vulnerabilities count and estimated remediation cost to prioritize fixes.
- Share the insurance discount potential with the customer to show the financial upside of closing the gaps.
How the result changes with Lock quality (0-10)
| Lock quality (0-10) | Overall security score |
|---|---|
| 2.5 | 39.3 |
| 3.75 | 42.1 |
| 7.5 | 50.3 |
| 10 | 55.8 |
What each input means
- Perimeter security (0-10)
- Fencing, gates, landscaping visibility, perimeter barriers.
- Door security (0-10)
- Door construction, frame reinforcement, strike plates, hinges.
- Window security (0-10)
- Window locks, security film, bars/grilles, glass break sensors.
- Exterior lighting (0-10)
- Adequate exterior lighting, motion-activated lights, dark spots.
- Lock quality (0-10)
- Lock grade, pick resistance, bump resistance, key control.
- Alarm system (0-10)
- Alarm coverage, monitoring, sensor placement, backup power.
- Camera coverage (0-10)
- Camera count, placement, recording quality, coverage gaps.
- Access control (0-10)
- Key management, electronic access, visitor procedures, audit trails.
What each result means
- Overall security score
- Weighted security score out of 100 (85+ excellent, 70+ good, 50+ fair, below 50 poor).
- Risk level (1-5)
- 1 = Excellent, 2 = Good, 3 = Fair, 4 = Poor, 5 = Critical.
- Weakest area (code)
- 1=Perimeter, 2=Doors, 3=Windows, 4=Lighting, 5=Locks, 6=Alarm, 7=Cameras, 8=Access control.
- Critical vulnerabilities
- Number of categories scoring below 4 (critical risk threshold).
- Est. remediation cost
- Estimated cost to bring all categories up to acceptable levels.
- Insurance discount (%)
- Potential insurance premium discount based on security score.
- Lock subscore
- Lock quality score (highest weight in a locksmith survey).
- Physical barrier score
- Combined doors, windows, and perimeter score out of 100.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersPerimeter security (0-10) = 5, Door security (0-10) = 5, Window security (0-10) = 5, Exterior lighting (0-10) = 5 = 8 input(s) provided
- Calculate Overall security scoreOverall security score = (weightedSum / totalWeight / 10) * 10044.8 = 44.8
- Calculate Risk level4 = 4
- Calculate Weakest areaWeakest area6 = 6
Engine last updated . Checked against 3 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
Why are lock quality and doors weighted so much higher than cameras or access control?
Lock quality carries a weight of 22 and doors a weight of 20, versus 8 each for cameras and access control — roughly two and a half times as much influence on the overall score. That reflects the calculator's locksmith-focused perspective: the barrier and locking hardware itself is treated as the most consequential factor in physical security, ahead of monitoring and surveillance systems.
Is the 'weakest area' the category with the lowest weighted impact, or just the lowest raw score?
It's the lowest raw score among the eight categories, not the lowest weighted contribution — the calculator sorts all eight scores ascending and reports whichever one you rated lowest, regardless of that category's weight. So a low score in a lightly-weighted category like cameras can still be flagged as your weakest area even though it has less effect on the overall 0-100 number.
Why might my estimated remediation cost be high even with a decent overall score?
Remediation cost is calculated per category independently, using a different per-point cost for each: cameras and alarm deficiencies cost $600 and $500 per point below threshold, while lighting or lock quality cost $250 and $150. A single very low score in an expensive-to-fix category like perimeter or cameras can drive up total remediation cost even when your other categories are strong enough to keep the weighted overall score respectable.
What triggers a category to count as a 'critical vulnerability'?
Any of the eight categories scoring below 4 (on the 0-10 scale) counts as a critical vulnerability, and the calculator simply counts how many categories fall below that line. This threshold is independent of the weighted overall score — a property can have zero critical vulnerabilities and still land in the 'fair' risk tier, or vice versa, depending on how the low scores are distributed.
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