CHAPTER 18 Title 10 R-3A Residence Zone
CHAPTER 18
R3-A RESIDENCE ZONE
SECTION:
10-18-1: General Objectives and Characteristics of Zone
10-18-2: Use Requirements
10-18-3: Location of Accessory Structures
10-18-4: Lot Coverage
10-18-5: Special Provisions Regarding Single-Family Attached Townhouse Dwellings
10-18-6: Vehicular Access
10-18-7: Special Provisions Apply to R3-A Zone
10-18-1: GENERAL OBJECTIVES AND CHARACTERISTICS OF ZONE: The objective in
establishing the R3-A Residence Zone is to establish an area within the City in which the primary
use of the land is for residential purposes. Characteristic of this zone is a greater density and a
wider variety of dwelling types and uses than other residential zones. The R3-A Zone is essentially
residential in character; therefore, all uses must be developed and maintained in harmony with
residential uses attractive lawns, shrubs, trees, both on the street and around the buildings, is
also characteristic of this zone. This zone does not allow density that will exceed twenty (20)
dwelling units per acre.
In order to accomplish the objectives and purposes of this ordinance and to promote the
characteristics of this zone, the following regulations shall apply in the R3-A Residence Zone (see
also §10-5 Supplementary Regulations to Zones, §10-7 Special Provisions Applying to
Miscellaneous Uses, §10-29 Subdivision Regulations, and §10-37 District Use Matrix).
10-18-2: USE REQUIREMENTS: In addition to the allowed residential uses the following
uses shall be permitted in the R3-A Residence Zone:
(A) Off street parking lots.
(B) For property zoned R3-A prior to April 1, 2004, ONLY, with no subsequent change to
another zone: Office buildings for professional persons, such as doctors, dentists,
accountants, attorneys, architects.
(C) For property zoned R3-A prior to December 1, 2017, ONLY with no subsequent change
to another zone: Mortuaries, Crematories and funeral parlors, pursuant to a conditional
use permit issued by the Board of Adjustment.
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10-18-3: LOCATION OF ACCESSORY STRUCTURES:
(A) Side yard requirements for accessory structures shall be the same as for main buildings,
except those subject to §10-18A-5(A). Any accessory structure placed in the calculated
side yard of the main building shall maintain the side yard requirements of the zone in
which it is in. The distance between the main building and the accessory structure shall
be subject to the requirements in the most recently adopted version of the International
Building Code or International Residential Code as they may apply.
(B) No side yard shall be required for accessory structures which are located more than
twelve (12) feet in the rear of the main building (calculated from the furthest point of
extension of any part of the foundation), provided that the auxiliary
remains within the property.
(C) There shall be no side yard setback requirement for the property line between zero lot line
single-family attached dwellings where the dwelling units are attached by party
wall/common walls. The side yard requirements shall be maintained for the exterior
boundaries of any units, which are attached by party walls. All accessory structures shall
comply with the setback requirements set forth above. There shall be an attached party
wall/common wall of no less than twelve (12) feet between any attached dwellings
permitted within this chapter or any subsequent chapter allowing single family attached
dwellings.
10-18-4: LOT COVERAGE:
(A) Maximum Lot Coverage. Lot coverage, including all areas under roofs and paved or
concrete surfaces, shall not exceed seventy percent (70%) of the total lot and parking
area. The maximum lot coverage of single-family attached dwelling units shall be sixty-
five percent (65%) for interior lots and fifty percent (50%) for corner lots. The remaining
lot area shall be landscaped in accordance with provisions of this ordinance. All
landscaping outside of that immediately between any main building and any public street
shall be located, designed, and developed for the benefit and enjoyment of the residents
of the dwelling(s), including appropriate play areas for children.
(B) Lot Coverage Exemption. The landscaped area on a lot will be considered to include such
hard-surface outdoor recreation facilities as tennis courts, basketball courts, shuffleboard
courts, and swimming pools, provided that:
1. The hard-surface outdoor recreation facilities make up no more than forty percent
(40%) of the required landscaped area, and
2. Those facilities are available for the use of all residents of the development.
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(C) Required Buffers. Wherever a development in the R3-A Zone adjoins land zoned RE, RP,
RP-A, R-1, R1-A or RMH, or unincorporated land designated for single family residential
use in the City's Comprehensive Plan, a minimum ten (10) foot wide landscaped buffer
and a minimum six (6) foot high site obscuring fence shall be provided. This buffer may
be included in the thirty percent (30%) minimum landscaped area required in (A) above.
If an open space of at least thirty (30) feet is provided between all buildings (whether main
or auxiliary) and the adjacent zone the requirement of a fence can be waived. Said open
space shall include some combination of planted trees, shrubs, vines, ground cover,
flowers or lawns.
10-18-5: SPECIAL PROVISIONS REGARDING SINGLE-FAMILY ATTACHED
TOWNHOUSE DWELLING: These provisions apply to single-family attached townhouse
dwellings (those attached to adjacent units via zero lot lines) only.
(A) No single-family attached dwelling shall be located above another dwelling unit, either in
whole or in part.
(B) Each single-family attached dwelling shall have at least one direct pedestrian access from
the interior of the dwelling to the property line of the dwelling unit and no pedestrian access
may be held in common with another single-family dwelling unit.
(C) Except as noted below, a single-family attached dwelling shall have no facilities or property
in common with another single-family attached dwelling and all dwellings shall be
structurally and functionally independent from each other. All single-family attached
dwellings shall have separate electrical service, water service lines, and sanitary sewer
service lines. Common facilities or property are allowed for the following:
1. Common party walls constructed in accordance with the International Building
Code.
2. Foundations supporting attached or party walls.
3. Flashing at the termination of the roof covering over any attached walls.
4. Roofs.
5. Vehicular access to a dedicated street for off-street parking facilities or detached
garages.
(D) No certificate of occupancy shall be issued for a single family attached dwelling unless a
common facility or party wall agreement or Declaration of Condominium, together with a
separate legal description for each living unit has been filed with the Bonneville County
Recorder's Office and a copy provided to the City of Ammon, for each such dwelling unit
which shares common facilities with another unit. Such agreement shall include a legal
description of the individual dwelling units sharing common facilities and shall allocate
responsibility as and between the owners of such lots for the use, maintenance, and
ownership of all common facilities.
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10-18-6: VEHICULAR ACCESS: All lots upon which a dwelling is located shall have
a vehicular access to and frontage upon a dedicated street or upon a granted easement of
access of not less than twenty-five (25) feet in width and of a distance from the public dedicated
street of no longer than approved by the planning and zoning commission.
10-18-7: SPECIAL PROVISIONS APPLYING TO R-3A ZONE: Landscaping shall be as set
forth in section 10-5-24.
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