Align contingency with complexity, age of the home, and investigation quality. Historic houses, structural changes, or tight schedules warrant higher buffers. Track draws against the contingency separately to reveal trends early and avoid masking issues by quietly cannibalizing funds from unrelated categories.
Assume some plumbing, electrical, or framing surprises, and budget for exploratory openings before finalizing finishes. Set criteria for when to pause work and re-estimate. Clear thresholds reduce panic, keep choices rational, and prevent a cascade of rushed spending after a single discovery.
Confirm builder’s risk insurance, liability coverage, and warranties, and ask for endorsements that fit your project. Insurance cannot solve everything, but it can transfer catastrophic risk, smoothing finances if rare events occur and allowing your cash reserves to remain focused on construction.
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