According to Florida construction industry standards, which situation would justify the highest contingency percentage in an estimate?
Correct Answer
D) Renovation of a 50-year-old building with incomplete drawings and unknown conditions
Renovation projects with incomplete drawings and unknown existing conditions carry the highest risk and uncertainty, justifying higher contingency percentages due to potential hidden problems and unforeseen conditions.
Why This Is the Correct Answer
Renovation of a 50-year-old building with incomplete drawings and unknown conditions represents the highest risk scenario requiring maximum contingency. Unknown structural conditions, outdated systems, potential asbestos or lead, hidden utilities, and incomplete documentation create numerous variables that can significantly impact project costs. Industry standards typically recommend 15-25% contingency for such high-risk renovation projects versus 5-10% for new construction.
Why the Other Options Are Wrong
Option A: New construction on a cleared, level site with complete drawings
New construction on cleared, level sites with complete drawings represents low risk with minimal unknowns. Site conditions are known, drawings are complete, and there are no existing structural surprises. This scenario typically requires only 5-10% contingency, the lowest percentage range.
Option B: Repeat construction of a previously built design
Repeat construction of previously built designs carries very low risk since all potential issues have been identified and resolved in the original project. Construction methods, material quantities, and labor requirements are well-documented, requiring minimal contingency of 3-8%.
Option C: Standard commercial construction with experienced subcontractors
Standard commercial construction with experienced subcontractors represents moderate, predictable risk. While some unknowns exist, experienced teams and standard practices minimize surprises. This typically requires 8-12% contingency, significantly less than high-risk renovation projects.
Memory Technique
Remember 'OLD + UNKNOWN = HIGH CONTINGENCY' - Older buildings with unknown conditions always require the highest contingency percentages due to hidden surprises.
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