вскрыть непредвиденные проблемы(I favour the full new build as it conserves that block of land for future uses. Renovations are more likely to discover unforeseen problems that were not detected before and require un-budgeted "change orders" to fix before proceeding. (burnabynow.com)ART Vancouver)
непредвиденные обязательства(Like individuals, business concerns also face emergencies and have contingent and unforeseen liabilities; therefore they also keep a portion of their income in ... Alexander Demidov)