Historic Building Assessment Calculator

Condition assessment scoring for historic structures.

Structural (1-5)

Roof (1-5)

Exterior (1-5)

Mechanical (1-5)

Interior (1-5)

Site (1-5)

Tab to move between fields

Overall score (1-5)

Priority (0-3)2

Critical systems1

Years to intervention8

How to Use This Calculator

Walk the building and rate each system: Structural, Roof, Exterior, Mechanical, Interior, and Site on a 1 (critical) to 5 (excellent) scale.
Base scores on visible deficiencies — a structural rating of 1 or 2 indicates immediate intervention is needed.
Review the Overall score (1–5) — scores below 2.5 typically warrant emergency stabilization before any programmatic work.
Check the Priority rating (0=Emergency, 1=Priority, 2=Standard, 3=Maintenance) to sequence repair work.
Note Critical systems — the number of building systems requiring immediate attention drives the repair budget urgency.
Use Years to intervention to establish a capital planning timeline and set a preservation maintenance schedule.

How the result changes with Structural (1-5)

Structural (1-5): Foundation, framing, load-bearing walls (1=critical, 5=excellent).
Roof (1-5): Roofing, flashing, drainage condition.
Exterior (1-5): Siding, masonry, windows, trim condition.
Mechanical (1-5): HVAC, plumbing, electrical systems.
Interior (1-5): Interior finishes, floors, historic features.
Site (1-5): Grading, drainage, landscaping, parking.

Identify Input Parameters
4 parameters
Structural (1-5) = 3, Roof (1-5) = 3, Exterior (1-5) = 3, Mechanical (1-5) = 2 = 6 input(s) provided
Calculate Overall score
Overall score = round(overallScore * 100) / 100
3 = 3
Calculate Priority
2 = 2
Calculate Critical systems
Critical systems
1 = 1