Johns Creek, GA Accessory Structures: ADU Rules (2026)
ADU rules in Johns Creek, GA, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.
Key Facts
- Code section
- Zoning Ordinance § 19.3.5 (Guest House)
- Local term for ADU
- Guest House (detached accessory dwelling unit)
- Number allowed
- 1 per lot
- Min / max heated floor area
- 650 sq ft min, 1,500 sq ft max
- Kitchen
- Separate kitchen facility allowed
- Location
- Rear yard only; principal-building setbacks apply
- Renting
- Not allowed; relatives, guests, or on-site employees only, no rent
Summary
Johns Creek allows a detached accessory dwelling unit, called a Guest House, on single-family lots. Zoning Ordinance Section 19.3.5 caps it at one per lot, 650-1,500 sq ft of heated floor area, rear yard only, with principal-building setbacks. It may have a kitchen but cannot be rented.
Guest House. A detached accessory dwelling unit located on the same lot with a single-family dwelling unit. A guest house may be only used by relatives, guest or employees that work on the property without payment for rent. 19.3.5 Standards: 1. No more than one guest house structure per lot may be used for occupancy by relatives, guest(s) or employees that work on the property without payment for rent. 2. A separate kitchen facility shall be allowed. 3. Heated floor area shall be a minimum of 650 square feet and a maximum of 1500 square feet. 4. Principal building setbacks shall apply. 5. The location shall be limited to the rear yard.
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
Johns Creek regulates accessory dwelling units under the term Guest House. Article III of the Zoning Ordinance defines a Guest House as a detached accessory dwelling unit located on the same lot with a single-family dwelling unit, used only by relatives, guests, or employees who work on the property without payment of rent. 5 sets the standards: a Guest House is permitted in nearly all residential districts (R-1 through R-6, NUP, CUP, TR, A, A-L, AG-1, O-1, and MIX) when accessory to a single-family dwelling.
No more than one guest house structure per lot may be used for occupancy. A separate kitchen facility is allowed. Heated floor area must be a minimum of 650 square feet and a maximum of 1,500 square feet. Principal-building setbacks apply (not the smaller accessory-structure rules), and the location is limited to the rear yard. Because the unit cannot be rented and must house only relatives, guests, or on-site employees, Johns Creek does not permit a true income-producing ADU the way some states mandate. Georgia has no statewide ADU mandate, so the Johns Creek Guest House standard is the controlling local rule.
Violations & Fines
Building or occupying a guest house without a permit, renting it out, exceeding the 1,500 sq ft maximum, placing it outside the rear yard, or adding a second guest house can trigger code-enforcement action, stop-work orders, and required correction or removal. Renting the unit violates the no-rent occupancy limit in Section 19.3.5.
Frequently Asked Questions
Can I rent out a guest house (ADU) in Johns Creek?
How big can a Johns Creek guest house be?
Where on my lot can a guest house go?
Sources & Official References
Other rules in Johns Creek
How Johns Creek compares: Easiest Cities to Build an ADU·Compare Johns Creek to another location·View the Georgia accessory structures overview
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ADU Rules in Nearby Cities
How other cities in Fulton County handle adu rules.