Why Is My Dog Peeing On Brand New Carpet?

We have a 1 1/2 year old bichon cockapoo. He has been house trained for quite some time. We just bought a new house and he started peeing on a brand new area rug in our living room. We removed the rug completely (ceramic tile underneath) then he started peeing on the new small rug we have by the stairs. We have carpet throughout the house but the two matching rugs are the only thing he has peed on. What is going on? Is it the texture of the rug? Maybe the color?