Speaking to Somerset Life, the 59-year-old spilled the reasons behind his decision.
"I just love places with character. I have various houses in various places and they all mean something special to me," he said.
"I don't have them just to say I own them, I have them for use and because they are a bit special."
The 'Fantastic Beasts: The Crimes of Grindelwald' actor additionally explained that staying in the area gave him a more comfortable life away from the spotlight.
He added: "British people are cool and will greet you as if you are a neighbour without going over the top."
Privacy was another reason for Depp.
"I don't mind if people want an autograph or a brief chat but not when I am having some private time with my family," he said.
"I can go into shops without being surrounded by people wanting selfies. I don't mind that up to a point, but sometimes it gets a little too crowded."
Pointing out that the low-key lifestyle suited him the best, he further said: "I like going to places, seeing things and meeting people - but I'm not the great extrovert that people think."
He went on to say, "In truth, I'm quite a shy person. That's one of the great things about Britain, and especially Somerset. I can just be me - and that's nice."
Johnny bought an 850-acre estate in Somerset for 13 million pound ($1,58,95,100) in 2014, as per the Evening Standard. His property, which Somerset Life described as "a great manor house," is a 19th century mansion equipped with 12 bedrooms and eight bathrooms. It is also surrounded by walled gardens.