Do you underwrite a conversion to sale at stabilization or to a long hold?
Working through a sponsor's model on a 165,000 sf mid-block office going to 190 apartments, and the exit assumption is doing more work than anything else in the file.
The base case sells 14 months after certificate of occupancy at a cap rate 40 basis points below where comparable stabilized multifamily is trading today, and the return falls apart if that compression doesn't happen. When I asked, the sponsor said the alternative is holding, and their hold case shows a lower IRR but a much longer runway of rent. Both cases are in the same deck and they don't reconcile.
The argument for underwriting to sale: the whole thesis is that you create value in the conversion, and the way you prove and harvest that value is to sell into the housing shortage while obsolete-office basis is still unrepeatable. Capital comes back, gets recycled into the next building at distressed pricing, and you never find out whether your assumptions about a converted building's operating costs 15 years out were right.
The argument for underwriting to hold: converted stock is complicated to operate, the exit market for a first-generation conversion is thin, and the only way to actually collect the spread you created is rent over time. Underwriting to sale also lets a sponsor bury cost overruns in an exit cap assumption nobody can falsify until it's too late.
Same building, same basis, two different funds. Which one do you want to be an LP in?
How should institutional conversion capital underwrite the exit?
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