aux box model 240 prefab prefabricated home with wood deck and blue painted steel cladding.

Prefab Builder Aux Box Makes Preciously Small Backyard Homes and Offices Starting at $32K

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Although aux boxes were originally designed as detached one-room structures of around 100 square feet, they now offer the larger Model 240 and Model 620. (The model number denotes its footprint in square feet).