In the early morning hours of December 4, 1906, the Preston carbarns of the Galt, Preston & Hespeler Street Railway, and the Preston & Berlin Railway, were destroyed by fire. Two large cars, numbers 20(1st) & 30, two summer open cars whose numbers are unknown, GP&H cars 22 & 23, a new $12,000 freight motor, two freight cars and a sweeper were lost. Only two passenger cars and one freight car escaped the flames. The fire is believed to have been caused either by workmen making repairs inside the shops or a faulty stove in one of the cars.

The remains on the right is that of either 20(1st) or 30, while the car to its left is likely 22 or 23.

Almost immediately, four passenger cars were ordered from the Ottawa Car Co., numbered 21, 31, 41 & 51, and one freight motor, 20(2nd), from Baldwin-Westinghouse. Construction of a new larger car barn and shops commenced as well on the same spot.