Anyone here renovate garage attic for living space?

[Seb Ko]

Hi Chitown BP folks, I'm thinking of renovating the garage attic space into an office area (no plumbing and not a bedroom). It's a good amount of space for this purpose. Challenge is that the garage is not insulated at all so it's pretty hot in summer, pretty cold in winter. Will a proper insulation (blown perhaps) work well enough along with auxiliary heaters and window A/C make the space liveable during the day? Anyone have experience with this or seen examples?