update the existing detached garage with an exterior facelift so it matches a two story craftsman influenced traditional home with subtle colonial revival character keep the existing structure generally intact but refresh it with white horizontal lap siding crisp white trim a dark charcoal to black shingle roof wide eave overhangs exposed rafter tails and simple craftsman style brackets or knee braces where appropriate use divided lite windows with white trim and install classic craftsman or carriage house style garage doors in white or warm white with optional subtle black hardware and a natural wood pedestrian door accent the overall look should be clean timeless and historically compatible with the main house with no overly modern design elements