A Las Vegas wedding puts a lot of people on airplanes. Most of them stay in hotels for three nights, and the arithmetic of that is somebody else's job. The part that lands on the couple arrives afterward, when the same relatives come back for a birthday, a holiday, a baby, and there is no room block and no coordinator. A pull-out sofa handles one visit. It does not handle a pattern.
Couples who settle in the valley tend to reach the same conclusion within a few years. Recurring guests need a door that closes, a bathroom that is not the one everybody shares, and somewhere to put a suitcase that is not the living room floor. Sometimes the answer is a bedroom added off the back of the house. Sometimes it is a separate structure in the yard, which in Nevada also has a second life as a rental unit or a suite for an aging parent, depending on the decade.
That whole category carries its own set of problems: setbacks, utility runs, and whether a new roofline reads as part of the house or as a shed somebody bolted on. Kingdom & Co treats it as a single service line, and is one Las Vegas firm that groups guest houses, pool houses, additions and accessory dwelling units together, with finished casitas in Lone Mountain, Rhodes Ranch, Green Valley and Centennial Hills shown in its portfolio. Its stated approach puts interior design and construction on the same team from the start, so an addition matches the main residence.
The design question that carries the most weight is not size. It is separation. A casita sharing a wall with the primary bedroom is a guest room with extra steps. One placed across a courtyard, with its own entrance and its own approach from the driveway, gives both households a normal morning. That decision gets made on a site plan in the first weeks of a project and is close to impossible to undo once footings are poured.
Engaged couples reading a wedding site are not shopping for a contractor, and this is not a nudge to start. It is a note for the version of you three years out, hosting the fourth visit from the same four people. When that stage arrives, count the visits per year and the nights per visit before pricing anything. Those two numbers decide whether the answer is a bedroom or a building.