The blaze broke out at 6:15 a.m. Monday at the Rolling Hills development in the 2100 block of Buchert Road.
Firefighters arrived to find flames coming from a 2-story townhouse.
The fire went to 2 alarms before crews got the upper hand.
No injuries were reported.
The American Red Cross of Southeastern Pennsylvania was assisting 6 people from 2 families with food, clothing and lodging.