Regulation of Accessory Dwelling Units.

GENERAL ASSEMBLY OF NORTH CAROLINA
SESSION 2025
H 2
HOUSE BILL 627
Committee Substitute Favorable 4/29/25

Short Title: Regulation of Accessory Dwelling Units. (Public)
Sponsors:
Referred to:
April 2, 2025
*H627-v-2*
A BILL TO BE ENTITLED 1
AN ACT TO INCREASE A FFORDABLE HOUSING BY ALLOWING FOR THE 2
CONSTRUCTION OR SITING OF ACCESSORY DWELLING UNITS. 3
The General Assembly of North Carolina enacts: 4
SECTION 1.(a) Part 1 of Article 9 of Chapter 160D of the General Statutes is 5
amended by adding a new section to read: 6
"§ 160D-917. Accessory dwelling units. 7
(a) A local government shall allow the development of at least one accessory dwelling 8
unit which conform s to t he North Carolina Residential Code for One - and Two -Family 9
Dwellings, including applicable provisions from fire prevention code s, for each single -family 10
detached dwelling in areas zoned for residential use that allow for development of single-family 11
detached dwellings. An accessory dwelling unit may be built or sited concurrently or after the 12
primary single-family detached dwelling has been constructed or sited. Nothing in this section 13
shall prohibit a local government from permitting accessory dwelling units in any area not 14
otherwise required under this section. 15
(b) In permitting accessory dwelling units under this section, a local government shall 16
not do any of the following: 17
(1) Prohibit the use of the primary single-family detached dwelling and the 18
accessory dwelling for long-term rentals by separate households. 19
(2) Require placement in a conditional zoning district. 20
(3) Establish minimum parking requirements or other parking restrictions, 21
including imposition of additional parking requirements where an existing 22
structure is converted for use as an accessory dwelling unit. 23
(4) Prohibit the connection of the accessory dwelling unit to existing utilities 24
systems serving the primary single-family detached dwelling, provided the 25
utility service to that primary single-family detached dwelling has capacity to 26
serve both dwellings. 27
(5) Charge any fee s in excess of those charged for the permitting of a 28
single-family detached dwelling similar in nature. 29
(6) Set a maximum accessory dwelling unit size of less than 800 square feet. 30
(c) A local government may do any of the following: 31
(1) Impose a setback minimum for accessory dwelling units of 10 feet or the 32
setback minimum imposed generally upon lots in the same zoning 33
classification, whichever is less. 34
(2) Require that accessory dwelling units be located to the side or rear of t he 35
primary single-family detached dwelling. 36
General Assembly Of North Carolina Session 2025
Page 2 House Bill 627-Second Edition
(3) Require that accessory dwelling units be smaller than the primary 1
single-family detached dwelling. 2
(d) Except as otherwise provided in this section, a local government may regulate 3
accessory dwelling units pursuant to this Chapter and nothing in this section shall be construed 4
to impair the authority of a local government to adopt and enforce ordinances pursuant to Part 2 5
of this Article to comply with State and federal law, rules, and regulations, or permits consistent 6
with the interpretations and directions of the State or federal agency issuing the permit. 7
(e) Nothing in this section shall apply to any of the following: 8
(1) The validity or enforceability of private covenants or other contractual 9
agreements among property owners related to dwelling type restrictions. 10
(2) Properties located in a historic preservation district established pursuant to 11
Part 4 of this Article. 12
(3) Properties designated as a National Historic Landmark by the United States 13
Department of Interior. 14
(4) An accessory dwelling unit that is not connected to water, well and septic, and 15
sewer. 16
(f) For the purposes of this section, the term "accessory dwelling unit" means an attached 17
or detached residential structure that is used in connection with, or that is an accessory to, a 18
primary single-family detached dwelling and that has less total square footage than the primary 19
single-family detached dwelling." 20
SECTION 1.(b) This section becomes effective October 1, 2025, and applies to 21
applications for accessory dwelling unit permits submitted on or after that date. 22
SECTION 1.(c) A local government that has enacted an ordinance that meets the 23
requirements of this act and G.S. 160D-917, as enacted by this act, is not required to adopt a new 24
ordinance. 25
SECTION 2. Local governments shall adopt development regulations to implement 26
the provisions in this act no later than January 1, 2027. If a local government fails to adopt 27
development regulations as required by this act by January 1, 2027, accessory dwelling units 28
shall be allowed in that local government without any limitations. 29
SECTION 3. Except as otherwise provided, this act is effective when it becomes 30
law. 31