Paul Cox, 13, was last seen by a family member at the home address on Egerton Road, Blackpool at about 9.15am on Friday (September 23)
Paul is described as slim, 5ft 4ins, with cropped dark brown hair.
He was last seen wearing a black t-shirt, maroon jeans and a maroon coat and black trainers.
A police spokesman said: “We are getting more concerned about Paul as time passes and I would urge anyone who sees him or knows where he might be to get in touch. I would also urge Paul himself to contact us if he sees this appeal to let us know he is okay.”
Anyone with information should contact police on 101 quoting log number 1104 of September 23.