A guest house usually needs residential zoning that allows accessory buildings, and some rural and agricultural zones allow one too. Whether it has a full kitchen often decides if the code treats it as a guest house or as an accessory dwelling unit.
New to zoning types? Read what residential zoning means and what it allows.
R - Residential
Is a guest house allowed in Columbus?
Open the Columbus zoning map to find a property's zoning district, then check what that district allows.
Check zoning in Columbus, OH →The difference usually comes down to the kitchen. In many codes, a guest house is a detached building with sleeping space and often a bathroom, but no kitchen, used by visitors or family. An accessory dwelling unit, or ADU, is a complete second home with its own kitchen, bathroom and living space.
| Feature | Guest house (guest quarters) | ADU |
|---|---|---|
| Kitchen | Usually not allowed, sometimes a wet bar only | Required |
| Counts as a second dwelling | Usually no | Yes |
| Long-term rental | Often prohibited | Usually allowed, sometimes with limits |
| Typical code section | Accessory structures or guest quarters | ADU or second unit rules |
| State protections | Rare | Strong in some states |
If you add a full kitchen, most codes will treat the building as an ADU no matter what you call it. The ADU zoning guide covers those rules.
Often yes, if your lot is in a residential zone that allows accessory structures and the lot has room. Check three things in your code: whether "guest house" or "guest quarters" is a listed accessory use, the size limits for accessory buildings, and whether there's a minimum lot size for one.
Some rural and agricultural zones are more generous, and some allow a second full home outright. The residential zoning guide and agricultural zoning guide explain what those districts usually allow.
Use the setback calculator and the lot coverage calculator to test a layout before you pay for drawings.
Expect a building permit at minimum, plus separate electrical, plumbing and mechanical permits. A few codes also require a zoning permit or an administrative review for guest quarters. If your plans are close to an ADU, ask the planning department which path is easier, because some states now make ADU approval simpler than guest house approval.
California is the clearest example. Its housing department's ADU fact sheet says ADUs must generally be approved ministerially in residential and mixed-use zones, and cities can't set rear and side setbacks over four feet for new ADUs. That can make an ADU the faster route there.
Many codes forbid renting a guest house because it isn't a legal second dwelling. Nightly rentals bring in short-term rental rules too. Before you list one, read short-term rental zoning and check whether your city allows rentals of accessory buildings at all.
Only if it has a full kitchen and meets the code's ADU definition. Without a kitchen, most codes treat it as an accessory structure or guest quarters.
On a home lot, a guest house is a private building for the owner's visitors. In lodging, "guest house" can also mean a small inn that rents rooms to the public, which zoning treats as a commercial use; see bed and breakfast zoning for that kind.
Some codes allow it for a limited time with a temporary permit, and others don't allow anyone to live in an accessory building before the main home is finished. Ask the building department before you move in.