From the chapter website
THE CURRENT HOME TO BETA RESTS WITHIN AN AREA OF 7.7 ACRES JUST SOUTH OF THE PORTAGE LAKE GOLF COURSE. THE THREE STORY HOUSE IS SURROUNDED BY TWO PONDS, A SAUNA, VOLLEYBALL COURT, AND BONFIRE PIT. THETA TAU HAS ALSO HAD NINE ST. BERNARD DOGS THROUGHOUT ITS YEARS AT MICHIGAN TECH WITH EACH BEING LOYAL AND PROTECTIVE OF ANCHOR HILL. IN 2006, BETA CELEBRATED 100 YEARS AT MICHIGAN TECH.
(from elsewhere on the page, they bought the house in 1963.)
Theta Tau's house is 2.8 miles off campus, but there are two that are farther away (Phi Kappa Tau and Sigma Rho) (
http://www.greek.mtu.edu/map/map.html)