I see from efcheerBB's old posts that your chapter moved from the Spartan St location to the old AOPi house, after AOPi began renting the Alpha Gam house when we closed. (After our chapter closed, I didn't pay as close attention to the goings on in Michigan State's Greek system.

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However, Theta Delta Chi has moved into the location on 445 Abbott. (Their old house at 139 Bailey...which was briefly the Alpha Gamma Delta house, before our 333 Charles St location was built...was purchased by the city and demolished this past week to make a parking lot.) So...although I was unaware that Sigma Delta Tau had moved from 120 Spartan St to 445 Abbott Rd, it appears that their current location is still a mystery.