Building Surveys for Non-Standard Construction in 2026 Urban Conversions: Hidden Defects and Valuation Risks

Nearly one in three office-to-residential conversions completed in major UK urban centres since 2020 has required significant post-purchase remediation — yet the majority of buyers entered those transactions without a Level 3 building survey. As demand for converted flats continues to surge in 2026, that gap between risk and due diligence is becoming dangerously wide. […]