THE FLT BEGAN WITH ABOUT 20 GAL OF FUEL IN THE ACFT'S 30 GAL FUEL TANK. ABOUT 1.7 HRS LATER, AS THE PLT WAS RETURNING TO LAND, HE REPORTED A 'SLIGHT FUEL SITUATION.' ABOUT 2 MIN LATER, THE ENG LOST POWER. SUBSEQUENTLY, THE ACFT WAS DAMAGED AS THE PLT WAS MAKING AN EMERGENCY LANDING ON A STREET ABOUT 1/4 MI FROM THE ARPT.