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Concord, NC Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

ADU rules in Concord, NC, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Units per lot: One accessory dwelling maximum
Size cap: 50% of home or 1,100 sq ft, less controls
Placement: Rear of principal building
AG/RE side placement: Only on lots over 10 acres
Sewer: County Health Dept. approval if no public sewer
Eligibility: Lot must already have a single-family home

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in North Carolina under recent ADU streamlining laws. The Concord, NC rules below cover local size, height, and setback requirements.

Summary

Concord allows one accessory dwelling or accessory apartment per lot in districts where the Use Table permits the use. The unit is capped at 50% of the primary home's livable area or 1,100 square feet, whichever is smaller, and must sit behind the main house.

Accessory Dwellings and Accessory Apartments are conditionally permitted in those zoning districts where such use is permitted in accordance with the Use Table. ... Only one (1) Accessory Dwelling or Accessory Apartment shall be permitted per lot. ... The Accessory Dwelling or Accessory Apartment shall not exceed fifty (50) percent of the square footage of the livable area of the primary structure or 1,100 square foot of gross floor area, whichever is less. ... An Accessory Dwelling shall be sited to the rear of the principal building. In the AG or RE zoning districts, the Accessory Dwelling unit may be sited to the side of the principal building only if the lot exceeds ten (10) acres in size. ... The Accessory Dwelling shall meet all setback requirements as established for principal uses within the zoning district within which it is located.

View official code

Full Breakdown

1 permits an Accessory Dwelling or Accessory Apartment only in districts where the Use Table already allows the use, so the zoning district controls before any site plan is drawn. Only one accessory unit is permitted per lot regardless of the size of the primary structure (Sec. 3), and the unit cannot exceed 50 percent of the livable area of the primary structure or 1,100 square feet of gross floor area, whichever is less (Sec. 4). Placement is restricted to the rear of the principal building; in the AG or RE agricultural/residential-estate districts, a side placement is allowed only if the lot exceeds ten acres (Sec.

5). The accessory unit must meet the same setbacks that apply to the principal use in that zoning district (Sec. 6), and its exterior, siding, roof pitch, window detailing and foundation or skirting must match the principal residence; manufactured homes cannot be pulled up to and attached to a primary residence and counted as an accessory dwelling, and stand-alone manufactured accessory units are limited to the MH Overlay District (Sec. 7). Owners must provide adequate off-street parking for occupants of the unit (Sec. 8), and where public sewer is unavailable the Cabarrus County Health Department must approve septic service before construction begins (Sec.

9). Eligibility is limited to parcels already containing a permitted single-family detached dwelling as the principal use (Sec. 10), and the unit must comply with all applicable local, state and federal housing codes (Sec. 2).

Violations & Fines

Building an accessory dwelling that exceeds the 1,100-square-foot/50-percent cap, sites it ahead of the principal residence outside the AG/RE exception, or skips Health Department sewer approval is a zoning violation subject to the CDO's general enforcement and civil penalty provisions administered by Concord Development Services, which can require removal or bring the unit into compliance before occupancy is allowed.

Frequently Asked Questions

How big can an ADU be in Concord, NC?

No larger than 50 percent of the primary home's livable square footage or 1,100 square feet of gross floor area, whichever number is smaller, per CDO Sec. 8.3.3.C.4. The unit also can't push a lot over its normal building coverage limits for the district.

Can I put a second accessory apartment on my Concord lot?

No. CDO Sec. 8.3.3.C.3 limits every lot to one accessory dwelling or accessory apartment, no matter how large the parcel is or how many other structures already sit on it.

Does a Concord ADU need to match the house?

Yes. Sec. 8.3.3.C.7 requires the exterior color, siding, roof pitch, window detailing and foundation or skirting to be compatible with the principal residence, and bars manufactured homes from being attached to a house and called an accessory dwelling.

Sources & Official References

[1]Concord Development Ordinance, Article 8

Other rules in Concord

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All Concord rules

How Concord compares: Easiest Cities to Build an ADU·Compare Concord to another location·View the North Carolina accessory structures overview

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