Portland, Or. – Fire investigators say  last week’s fire at an under construction two story addition to a North Portland home was arson. They are asking the public for help.

Homeowner Timothy Wilson was inside his home on North Foss Ct. when the fire broke out and tells KGW he’s shocked someone set it on purpose. He says he’s “very disappointed. It hurts my heart.”

Wilson has lived in the home for 20 years and says he was building the addition for rental income.

If you know anything about the fire, you are asked to call the Arson Investigation Unit tip line at 503-823-INFO(4636).