There is no ready-made checklist by which you can tell whether the property belongs to the luxury category. Still, some features characterize an upscale property. These include a first-class location, high-quality interior fittings such as marble worktops, professional kitchen appliances, and tailor-made cupboards as well as hotel-like services such as concierge service, a first-class fitness center, or a spa center. Still, not every high-end home is created equal. Often it is the unique characteristics that separate luxury properties from general ones. This includes, for example, buildings designed by a renowned architect.