Hundreds of thousands of people have viewed or shared the link to a photograph of the house after it was published on Twitter, the social networking site.
The slanted roof was said to resemble the Hitler fringe, the door lintel was the moustache and the small top windows were seen as the dictator’s piercing eyes.
The joke took off when it was tweeted by Jimmy Carr, the comedian, but the owner of the house in Port Tenant, Swansea, a man in his 70s, said he had never even heard of Twitter.