SUMNER COUNTY REGIONAL PLANNING COMMISSION
355 N. Belvedere Drive, Room 202, Gallatin, Tennessee 37066
OFFICE (615)451-6097 FAX (615)451-6074
ACCESSORY DWELLING UNIT (ADU) APPLICATION
Property Owner:
Property Address:
City
State
Tennessee
Zip
Mailing Address (if different)
City
State
Zip
Phone Number (day)
Phone Number (mobile)
Email:
NOTE: The development standards that must be met to establish an Accessory Dwelling Unit (ADU) are found in
Chapter 11, Section 1101, Subsection R of the Sumner County Zoning Resolution (attached). Before completing this
application, we recommend that you review these sections
and discuss your proposal with the Planning
Department. This Application must be submitted prior to the issuance of a zoning compliance certificate.
1.
PLEASE COMPLETE THE FOLLOWING PROPERTY INFORMATION:
Tax Map
Group
Parcel
Subdivision Name (if applicable)
Lot Size:
Size of proposed ADU (square
feet):
Size of principal residence (excluding garage and utility
space) :
Are there existing detached accessory structures on the property?
YES
NO
If yes, please indicate the total square footage of existing detached accessory
structures:
2.
Which method do you plan to use to create the ADU?
An internal conversion/remodel within an existing, detached single-family dwelling.
Add new square footage to an existing single-family dwelling.
Include an ADU within a single-family, detached dwelling at the time of its construction.
Convert an existing, detached accessory structure.
Construct a separate, detached ADU on the same lot as the primary dwelling unit.
3.
Which of the two units will be the designated “owner occupied” unit?
Principal Dwelling
Accessory
Dwelling Unit
4.
If the ADU is a new addition or detached building, please provide elevations of the ADU with the primary
dwelling unit to demonstrate how the ADU matches the design of the existing/principal dwelling with regards
to materials, colors, window styles, and roof styles.
5.
ADDITIONAL REQUIRED INFORMATION:
A dimensioned professionally prepared site plan showing the following features must be provided:
Lot lines Field lines and septic areas
Building footprints of all existing and Location of off-street parking in accordance
proposed structures with the Sumner County Zoning Resolution
Distances of structures to lot lines Proposed ADU entrance locations
Driveways
A dimensioned floor plan showing cooking, bath and living areas.
CERTIFICATION: Compliance with all applicable requirements must be accomplished and maintained in order to
construct/establish and occupy an accessory dwelling unit. By pursuing the authorization for an accessory dwelling
unit, you are committing to do such.
I hereby certify that the information contained in this application is true and correct to the best of my knowledge
and belief.
Applicant’s Signature
Applicant’s Name (Printed)
Date
STAFF USE ONLY
Received By:
Date:
Amount Paid/
Receipt #:
Date of PreApp
C
onference:
Sumner County Regional Planning Commission
355 North Belvedere Drive, Room 202
Gallatin, Tennessee 37066
(615)451-6097 Office
(615)451-6074 Fax
ACCESSORY DWELLING UNITS (ADUs)
INFORMATION AND APPLICATION
Accessory Dwelling Units are habitable living units added to, created within, or
detached from a single-family dwelling. These units contain facilities for living, sleeping,
eating, cooking and sanitation.
Sumner County allows ADUs in its residential zones as long as they meet the criteria of
the Sumner County Zoning Resolution, Chapter 11, Section 1101, Subsection R. A copy
of these regulations is attached. Please refer carefully to the Sumner County ADU
criteria and permitting requirements when planning your project.
If the proposed ADU fails to meet the criteria outlined in Section 1101 R.1 and/or R.2 of
the Zoning Resolution, the proposed ADU cannot be established unless approved by
the Board of Zoning Appeals.
APPLICATION PROCESS
ADU application and affidavit forms are attached. We will require that the applicant
provide certain information to prove that the proposed ADU meets Sumner County
standards. This will include a notarized and recorded affidavit by which the property
owner agrees to adhere to the ADU standards established in the Sumner County Zoning
Resolution. The property owner must submit the signed and recorded Declaration of
Covenant for Accessory Dwelling Unit to the Planning Department prior to making
application for a Building Permit for the ADU from Building Codes.
BUILDING PERMIT
Once the ADU permit is approved, the applicant may then apply for a Building Permit.
(For more information on the Building Permit process and fees please contact the
Sumner County Building Codes Department at (615) 452-1467
QUESTIONS?
Please contact the Sumner County Regional Planning Commission at 615-451-6097.
Section 1101, Subsection R, Accessory Dwelling Units (ADUs)
ADUs are permitted in any residential zoning district in connection with any lawfully existing single family
dwelling. There are two (2) categories of ADUs: By‐right and ADU’s requiring Special Exception Permits.
1.
General Provisions for ADUs
Applications for an ADU must meet certain conditions. In no case, shall an Application for an ADU request
an amendment to the following requirements
and none shall be granted by County Staff or the Board
of Zoning Appeals.
a.
The property owner must reside in either the principal structure or the ADU.
b.
Only one ADU is allowed per lot in conjunction with a single family house. ADUs are not allowed
in conjunction with duplex or multi‐family dwelling units.
c.
An instrument shall be recorded with the register’s office covenanting that the structure is being
established as an accessory dwelling unit and may only be used under the conditions expressed
herein.
d.
Adequate Facilities Tax and all other relevant development fees will be required for the ADU.
e.
Off‐street parking, in addition to the off‐street parking required for the single‐ family residence as
required in Appendix D, shall be required for the ADU.
f.
Prior to the issuance of a zoning or building permit, a plot plan prepared by a professional
surveyor must be submitted for the lot under consideration.
g.
Prior to the issuance of a permit, a floor plan and/or architectural renderings must be submitted
showing the proposed interior and exterior of the ADU.
h.
Verification from the state of Tennessee Department of Environment/Division of Ground Water
Protection that the individual on‐site wastewater treatment or septic system has the capacity to
serve the ADU. Also, verification that the ADU can adequately be served by water and electric
service providers must be provided.
i.
Only one minor or major home based business may be conducted on a lot that contains an ADU.
The business may be located in either the principal structure or the ADU.
2.
Design and Occupancy Standards
a.
The second unit must be occupied by family members as defined in Appendix A of this resolution,
or the invited guests of the occupant(s) of the primary structure, and may not be used as a rental
or leased unit.
b.
Any new separate outside entrance serving the ADU shall not be visible from the right‐of‐way.
c.
An ADU shall be designed to maintain the architectural design, style, appearance and character of
the principal residence. The ADU must be consistent with or visually match the existing façade,
roof pitch, siding and windows of the primary residence.
d.
A separate driveway providing exclusive access to the ADU from a road shall not be allowed
unless problematic lot‐specific circumstances (e.g. topography, significant existing structures or
improvements) necessitate separate driveway access as determined by the Planning Director.
3.
Particular Standards for By‐right ADUs
a.
Attached
i.
ADUs attached to the single‐family dwelling are limited to an area totaling less than
twenty‐five (25) percent of the gross floor area, excluding garage and utility space, of the
principal structure or 300 square feet, whichever is greater.
ii.
Must maintain the setback requirements of the underlying zoning district for principal
structures.
iii.
40,000 square feet of land area is required if utilizing a septic system.
b.
Detached
i.
Detached ADUs shall be considered attached for the purposes of setbacks if the accessory
structure is within 5 feet (5’) of the principal structure. Otherwise, detached ADUs must
meet setback requirements of the underlying zoning district for principal structures.
ii.
Detached ADUs may be established within an existing, legally established accessory
structure which meets the current adopted building code for residential structures in
Sumner County.
iii.
The size of the dwelling unit will be subject to the square footage limitations for accessory
structures listed in the table found this Chapter of this resolution and such unit shall in no
case exceed the size of the principal structure. An ADU must however, provide the
minimum area requirement of 300 square feet.
iv.
20,000 square feet of land area is required if connected to public sewer. 40,000 square feet of
land area is required if utilizing a septic system.
c.
Agricultural employee housing shall only be required to comply with those standards of this
section deemed applicable by the County.
4.
ADUs Requiring a Special Exception.
a.
Special Exception Required.
Applications for an ADU requiring a Special Exception from the Board of Zoning Appeals are listed
as follows:
i.
The Design and Occupancy Standards and Particular Standards for ByRight ADUs contained in this
Chapter cannot be met.
ii.
Applications for an ADU involving a mobile home.
b.
The Board of Zoning Appeals may impose additional standards or use conditions beyond those
enumerated above if deemed necessary by the Board.
5.
Existing ADUs
Legally created accessory dwellings units established prior to the enactment of these regulations may
continue to exist and will be regulated by the conditions under which they were approved.
6.
Abandonment of an ADU
A property owner may choose to abandon an ADU by meeting the following criteria:
a.
If attached to the principal residence, then access must be established between the housekeeping
units without going outdoors.
b.
The kitchen facility must be removed from the ADU so that it is no longer a self‐sufficient unit.
c.
Inspections from the Department of Building and Codes will be required to ensure that all
regulations are followed.
d.
An instrument must be recorded in the register’s office stating that the ADU no longer exists.
After recording, please return to:
Sumner County Regional Planning Commission
355 North Belvedere Drive, Room 202
Gallatin, Tennessee 37066
DECLARATION OF COVENANT FOR ACCESSORY DWELLING UNIT
We, the undersigned, hereby certify that we are the owners of real property located in Sumner County, Tennessee,
legally described as follows:
{INSERT LEGAL DESCRIPTION OF PROPERTY }
This existing residence on said property is identified by the following address:
{INSERT PROPERTY ADDRESS}
WHEREAS, the Owner(s) desire to construct and maintain an Accessory Dwelling Unit (ADU) on the subject property
and the County desires to ensure that the Accessory Dwelling Unit is built and maintained in accordance with the
requirements of the Sumner County Zoning Resolution;
WHEREAS, the Owner(s), have read and agree to abide by the Accessory Dwelling Unit standards and criteria set
forth in the Sumner County Zoning Resolution, Chapter 11, Section 1101, Subsection R;
NOW, THEREFORE, the Owner(s) agree as follows:
In consideration of the issuance by the County of Sumner of an Accessory Dwelling Unit (ADU) zoning compliance
certificate for the creation or construction of one ADU, we, the Owner(s) do covenant and agree to and with Sumner
County, pursuant to the Sumner County Zoning Resolution, Chapter 11, Section 1101, Subsection R, that:
1)
One of the two dwelling units (either the principal dwelling or ADU) shall be occupied by the owner of the
property, as the property owner’s principal and permanent residence, for at least six (6) months out of the
year;
2)
The accessory dwelling unit (ADU) shall maintain its architectural compatibility with the primary residence;
and,
3)
The second unit will be occupied by a family member, as defined in Appendix A of the Sumner County
Zoning Resolution, or their invited guest.
The Owner(s) further covenant and agree that in the event there is a violation of any of the above conditions, or the
standards contained in the Sumner County Zoning Resolution Chapter 11, Section 1101, Subsection Q, the ADU
approval shall be revoked, occupancy of the ADU shall immediately cease, and the Owner(s) shall provide for the
removal or legal reuse of all improvements added to create the ADU.
In the event that the ownership of this property is to be transferred, the Owner(s) further agree to inform any
prospective purchasers of the existence of this agreement and of the need to maintain compliance with the
County’s ADU requirements (currently Sumner County Zoning Resolution, Chapter 11, Section 1101, Subsection R).
This covenant and agreement shall run with the land and shall be binding upon the Owner(s), their successors, and
assignees in interest, and shall continue in effect so long as said Accessory Dwelling Unit shall remain, unless otherwise
released or revoked by authority of the Sumner County Planning Director.
Dated this day of , 20 .
Owner
Owner(s) Signature
STATE OF TENNESSEE
COUNTY OF SUMNER
Witness my hand and official seal at Gallatin, Tennessee, this day of , 20 .
My Commission Expires:
Notary Public