On an office to residential conversion, the hazardous materials survey is often what saves the schedule

Take a 1979 mid rise, 186,000 gross square feet, converting to 140 apartments. Owner's representation and MEP coordination fees on a project like this commonly run in the low hundreds of thousands over a roughly two year build, sometimes with a completion bonus tied to certificate of occupancy date. A typical starting budget on a conversion of this size might run around $34m of hard cost, roughly $183 a gross foot or $243,000 a unit, on a purchase price well under half that. Actual hard cost often lands 8 to 12 percent over budget, absorbed by contingency plus a partner capital call once contingency runs out. The risk that most often breaks a conversion budget is what's hiding in the risers. A design that assumes reuse of existing wet cores and new risers in a handful of locations can run into post tensioned tendons in the slab where the drawings show none, forcing a reroute that touches two dozen bathroom stacks. That kind of surprise commonly costs seven figures and ten or more weeks. What keeps a discovery like that from doubling in scope is the hazardous materials survey done early. An invasive survey with a meaningful sample count, done before closing rather than the visual screen a lender requires, tends to find asbestos in floor tile mastic and beam fireproofing on conversions of this vintage. Getting that abated as an early separate contract, before design is even finished, means that when a structural surprise hits later, abatement is already behind the project instead of stacked on top of it. The pattern worth keeping on a project like this: the invasive survey, a separate early abatement contract, and x-raying every penetration before pipe is ordered. The pattern worth reconsidering is a completion bonus structure that puts the project team in the position of arguing for schedule in rooms where someone needs to be arguing for scope.