It's possible for a smaller place. But this is a four-bed large detached house and my remote command centre is an elevated extension off the side (rather splendidly, the heating pipes go outside the actual house to get here1). I can't imagine sparking up the big boiler and pumping the hot water to my distant domain would be more efficient though.
I'm in the cold at the moment in a jumper and two sweatshirts, it's a rather balmy 18 degrees (I'm not sure if it's accurate, it feels colder) in the RMC. I usually only fire up the radiator when my fingers and toes start to go numb, which if the thermomobox is to be believed, sub 17.5 degrees, or when my wife shouts at me because she's working at home2).
1I wish I were joking, the come out from the side of the house and up into my office. They weren't even insulated. Now boxed-in and snug. That's British workmanship for you.
2Not told her about the Alexa thing and she doesn't know and probably won't learn to work the new themostat. It's for the best otherwise it'd be 25 degrees upstairs.