``It doesn't appear suspicious,'' Fire Chief Dave Sparks said.
But he's asked the Idaho Fire Marshal's office to help investigate the cause of the early Wednesday morning blaze at Aspen Village Condominiums.
No one was hurt, Sparks said, but there was ``radiant heat'' damage that discolored two nearby buildings.
The destroyed units were to have joined 40 existing condos at the site, which backs up to the city's golf course.
Sparks said the owner was to receive a certificate of occupancy in just two weeks.