What to screen first when evaluating an obsolete office building for conversion

Screening a possible office-to-residential conversion raises a real question worth working through carefully rather than guessing at. Say someone is looking at a 1970s three story office building, mostly empty, cheap per square foot, with a few thousand dollars to spend before deciding whether to keep going. Where should that money go first? Case for the building itself. A structural engineer and a mechanical consultant can determine whether the floor plate can take apartments with real windows, whether the plumbing risers land anywhere near where bathrooms would need to go, and whether the slab can be cored. If the answer is no, the process ends there for a few thousand dollars instead of forty thousand in architect fees. Most conversion projects that end badly have a building problem somewhere in the chain. Case for the market first. The building can be perfect and the rents still won't cover the conversion cost. No conversion has a hard cost under ground-up construction, so the rent side has to be strong, and lease-up in a market with three hundred new units delivering next year rarely is. If the numbers don't work at achievable rent, the engineering question never mattered. Case for zoning first, the argument most often made by people who've been burned. Use permitted, parking minimums, whether the jurisdiction has a conversion program in place. A great building means nothing if residential isn't allowed and a variance takes two years. This varies enormously by city and state, which is part of why it can deserve to go first. All three cases have merit, and the right sequencing usually depends on which risk is cheapest to rule out first in that specific market and building.