ADU Rules in Greenville, SC (2026)
ADU rules, permit requirements, size limits, and fees for Greenville, SC. Source-cited from official municipal code.
Yes, ADUs are allowed in Greenville, SC.
Greenville, SC permits accessory dwelling units (ADUs) on residential properties. ADUs — also called granny flats, in-law units, backyard cottages, or secondary suites — are secondary housing units on a single-family or multifamily lot. State and local law governs the approval process. In Greenville, the City of Greenville Planning and Development — Building Permits handles ADU permit applications. Below you will find the current size limits, setbacks, fees, and timeline for building an ADU in Greenville.
ADU Size Limits
ADU Size Limits in Greenville: Detached ADU: size varies by zoning — see official source (max height: varies — see official source). Attached ADU: size varies by zoning — see official source.
| Type | Max Size | Max Height |
|---|---|---|
| Detached ADU | See official source | See official source |
| Attached ADU | See official source | See official source |
Permit Fees
ADU Permit Fees in Greenville: Plan check fee: $200–$700. Building permit fee: $400–$2,000 based on construction value. Impact fees: None. School fees: None or N/A. Total estimated permit cost: Varies.
| Fee Type | Amount |
|---|---|
| Plan Check | $200–$700 |
| Building Permit | $400–$2,000 based on construction value |
| Impact Fees | None |
| School Fees | None |
| Total Estimate | See official source |
Permit Timeline
Greenville ADU Permit Timeline: Greenville Planning and Development processes permits. Standard ADU: 4-6 weeks. Greenville's online permit portal: https://aca.greenvillesc.gov/. Greenville's growth pace means permit backlogs can occur — early application submission recommended. Apply through the City of Greenville Planning and Development — Building Permits online permit portal. Phone: (864) 467-4476.
Setback Requirements
ADU Setback Requirements in Greenville: Front setback: follows zone standard. Side setback: no minimum. Rear setback: no minimum.
Parking Requirements
Parking Requirements: 1 parking space per ADU. Greenville's downtown core and walkable neighborhoods near Main Street may qualify for reduced parking requirements. Greenville Transit Authority (GTA) bus service extends to many residential areas. Properties within 1/4 mile of GTA routes may qualify for parking reduction under Greenville LMO.
Restrictions & Requirements
- Maximum one ADU per single-family residential lot
- ADU must be on same lot as primary dwelling
- Historic Hampton-Pinckney neighborhood properties may require additional design review
- ADU must have independent entrance from primary dwelling
- Lot coverage limits by zone apply — ADU footprint counts toward coverage
How Many ADUs Are Allowed?
Number of ADUs Allowed in Greenville: Single-family lots: 1. Multifamily properties: Additional units within base zone density limits. Greenville allows one ADU per single-family lot. Greenville's Housing Diversity Plan supports ADU expansion as part of addressing housing supply constraints driven by rapid growth.
- Single-Family Lots
- 1
- Multifamily Properties
- Additional units within base zone density limits
Statewide Preemption
ADU Preemption
We could not confirm a statewide ADU preemption statute for South Carolina.
View South Carolina preemption detailsHistoric District Considerations
Historic District Requirements: Greenville has 2 historic districts where additional design review may be required for ADU construction. Design review approval is required before obtaining a building permit for properties in historic overlay zones. Greenville's Hampton-Pinckney Historic Neighborhood is a locally designated historic district covering late-Victorian and early-20th-century homes near downtown. The North Main neighborhood also has historic significance. Greenville's design review is less prescriptive than Charleston's BAR but still requires compatibility with neighborhood character for exterior changes to designated properties. Greenville's historic preservation program is administered through the Planning and Development Department. Source: https://www.greenvillesc.gov/planning/historic-preservation Look up historic district boundaries at: https://www.greenvillesc.gov/planning/historic-preservation
Frequently Asked Questions
Can I build an ADU in Greenville?
Yes. Greenville, SC allows accessory dwelling units. On a single-family lot you can build 1.
How big can an ADU be in Greenville?
The maximum size for a detached ADU in Greenville is 900 square feet.
How long does it take to get an ADU permit in Greenville?
The typical ADU permit timeline in Greenville is Greenville Planning and Development processes permits. Standard ADU: 4-6 weeks. Greenville's online permit portal: https://aca.greenvillesc.gov/. Greenville's growth pace means permit backlogs can occur — early application submission recommended.. Total estimated permit fees are $800–$4,000 total fees.
Do I need extra parking for an ADU in Greenville?
Greenville parking rules for ADUs: 1 parking space per ADU. Greenville's downtown core and walkable neighborhoods near Main Street may qualify for reduced parking requirements. Greenville Transit Authority (GTA) bus service extends to many residential areas. Properties within 1/4 mile of GTA routes may qualify for parking reduction under Greenville LMO.
Do I have to live on-site to have an ADU in Greenville?
Owner-occupancy requirement in Greenville: No owner-occupancy requirement for ADUs in Greenville. Both primary dwelling and ADU may be rented simultaneously. Greenville's rapid growth and housing demand support ADU investment property development.
Source: City of Greenville Land Management Ordinance (LMO); Building Code. Last verified April 6, 2026. View source