According to a statement, the Duke and Duchess of Cambridge will "increasingly base their family at Kensington Palace".
Since 2014 the couple have always used their London home, Apartment 1A, as their official residence when carrying out royal duties, but they have based their young family primarily in their country home, Anmer Hall, in Norfolk.
This arrangement allowed William to work as a pilot with the East Anglia Air Ambulance, a role he has "valued hugely". But because the Prince is due to finish his role with the organization in the summer, it makes sense to return to London.
"Their Royal Highnesses love their time in Norfolk and it will continue to be their home," the statement emphasized.
In the fall, the family will relocate to London. The move will allow William and Kate to increase their official work on behalf of the Queen and for the charities and causes they support, as they have done in recent years. This commitment will "require greater time spent in London".
In addition, George will start school in the capital in September. Princess Charlotte will also go to pre-school and eventually school in London, the statement revealed.
The palace update ended with a few words from William, who said it had been a "huge privilege" to fly with the EEAA. "Following on from my time in the military, I have had experiences in this job I will carry with me for the rest of my life, and that will add a valuable perspective to my royal work for decades to come," he said.
He added: "I have loved being part of a team of professional, talented people that save lives every day. My admiration for our country's medical and emergency services community could not be any stronger."