They used to live next door to each other in Chiswick but last year McPartlin moved a few streets away with wife Lisa Armstrong.
Now, however, Dec is following him to the new road and has bought a £1.9 million property. He is also due to have it refurbished by the same architect that styled his colleague's, according to The Sun.
He has been given planning permission to put in a swimming pool with a retractable roof, Jacuzzi, golf simulator, cinema and gym.
“Ant’s house is not the most beautiful but it is big," a neighbour explained. "It will be slightly bizarre having two identical modern houses on the same road.”
“I’ve seen the plans for the new house and they do look amazing. Dec is building the ultimate bachelor pad. Nobody has objected – they are both very likeable people.”