Work is under way to make the architect’s most famous home water tight—a project that is expected cost about 40 more times than its entire construction budget.

Crews are closing the on ramp to shore up the parapet wall until permanent repairs can be made. “Damage to the bridge was limited to the concrete barrier that runs along the side of the bridge ...

Wright made the “parapet walls”—the low barriers around the house’s many balconies—much shorter than the 42 inches required by contemporary building codes. Wright, at just 5 feet 7 ...