HomeMy WebLinkAboutORD 6049CITY OF RENTON, WASHINGTON
ORDINANCE NO. 6049
AN ORDINANCE OF THE CITY OF RENTON, WASHINGTON, AMENDING
RESIDENTIAL ACCESSORY STRUCTURES REGULATIONS IN SUBSECTIONS 4-2-
110.A, 4-2-110.6, 4-2-110.E.4, 4-2-110.E.17, AND 4-6-030.0 OF THE RENTON
MUNICIPAL CODE, THE DEFINITION OF "BUILDING HEIGHT" IN SECTION 4-11-020
OF THE RENTON MUNICIPAL CODE, AND TABLE 1.2.9.A OF THE CITY OF
RENTON'S SURFACE WATER DESIGN MANUAL, PROVIDING FOR SEVERABILITY,
AND ESTABLISHING AN EFFECTIVE DATE.
WHEREAS, this matter was duly referred to the Planning Commission for investigation
and study, and the matter was considered by the Planning Commission; and
WHEREAS, pursuant to RCW 36.70A.106, on July 30, 2021, the City notified the State of
Washington of its intent to adopt amendments to its development regulations; and
WHEREAS, the Planning Commission held a public hearing on August 18, 2021, considered
all relevant matters, and heard all parties in support or opposition, and subsequently forwarded
a recommendation to the City Council;
NOW, THEREFORE, THE CITY COUNCIL OF THE CITY OF RENTON, WASHINGTON, DO
ORDAIN AS FOLLOWS:
SECTION I. All portions of the Renton Municipal Code in this ordinance not shown in
strikethrough and underline edits remain in effect and unchanged.
SECTION II. The row entitled "Minimum Rear Yard" in subsection 4-2-110.A of the
Renton Municipal Code is amended as shown in the excerpt of 4-2-110.A in Attachment A. All
other provisions in 4-2-110.A remain in effect and unchanged.
SECTION III. Subsection 4-2-110.6 of the Renton Municipal Code is amended as follows:
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ORDINANCE NO. 6049
4-2-110.6 DEVELOPMENT STANDARDS FOR RESIDENTIAL DEVELOPMENT
(DETACHED ACCESSORY BUILDINGS)
MAXIMUM NUMBER AND SIZE
General
RC, R-1, R-4,
Accessory structures shall only be allowed on lots in conjunction with a
R-6, R-8, R-
primary use.
10, R-14 and
The total floor area of all accessory buildings shall not be greater than the
RMF
floor area of the primary residential uses.
The lot coverage of the primary residential structure combined with all
accessory buildings shall not exceed the maximum lot coverage of the Zoning
District."
RC and R-1
2 structures — max. 720 sq. ft. per structure, or
1 structure — max. 1,000 sq. ft.
In addition, 1 barn or stable — max. 2,000 sq. ft., provided the lot is 5 acres or
more.
R-4, R-6, and
2 structures — max. 720 sq. ft. per structure, or
R-8
1 structure — max. 1,000 sq. ft.
R-10 and R-
1 structure per residential unit — max. 400 sq. ft.; provided, that they are
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architecturally consistent with the principal structure.
Except greenhouses, sheds, or other similar accessory structures — max. 150
sq. ft.
MAXIMUM `"►nI' 1111 nTr HEIGHTls,19
RC
12 ft.
R-1, R-4, R-
12 ft.
6, and R-8
Animal husbandry or agricultural related structures are subject to the
maximum wall plate height of subsection A of this Section, and associated
conditions. Additionally, the structure shall not be taller than the primary
dwelling.
R-10 and R-
12 ft.
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ORDINANCE NO. 6049
Agricultural related structures are subject to the maximum wall plate height
of subsection A of this Section, and associated conditions, except that the
structure shall not be taller than the primary dwelling.
RMF
25 ft.20, except that the structure shall not be taller than the primary
building(s).
Maximum Height for Public Facilities shall be determined through site plan review.
Maximum Height for Wireless Communication Facilities (Including Amateur Radio Antennas)
RC, R-1, R-4,
See RMC 4-4-140, Wireless Communication Facilities. Freestanding vertical
R-6, R-8, R-
monopole amateur radio antennas are allowed a maximum height of 45 ft.
10, R-14,
without a Conditional Use Permit. Taller structures will have maximum height
and RMF
determined pursuant to RMC 4-9-030, Conditional Use Permits.
LOCATION
General
RC, R-1, R-4,
R-6, R-8, R-
46 ft. from any residential structure. If sited closer than 46 ft., the structure
10, R-14 and
w&shall be considered to be attached.
RMF
R-14
For any lot that abuts an alley, vehicular access to garages or carports shall be
through the alley. When lots do not abut an alley, all garages and carports
shall be located in the rear yard or side yard.
MINIMUM SETBACKS
Front Yard
RC, R-1, R-4,
Setbacks applied to the primary structure also apply to accessory structures.
R-6, R-8, R-
Accessory structures shall not be located between the primary structure and
10, R-14 and
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a street.
RMF
Side Yards for Accessory Buildings
RC and R-1
5 ft., unless located between the rear of the house and the rear property line,
then 0 ft. side yard is allowed.
ORDINANCE NO. 6049
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R-4, R-61 R-
3 ft., unless located between the rear of the house and the rear property line,
8, R-10, R-14
then 0 ft. side yard is allowed.
and RMF
ear Yards for Accessory Buildings
RC
5 ft.
R-1, R-4, R-
3 ft., unless located between the rear of the house and the rear property line,
6, R-8, R-10,
then 0 ft. rear yard is allowed.
R-14 and
When located within 10 ft. of the rear property line, at least 25% of the lineal
RMF
length of the rear yard shall remain unoccupied from accessory structures,
except when the rear property line abuts an alley.
Except for garages/carports accessed through alleys: to ensure adequate
vehicular maneuvering area, garages and carports that are accessed through
alleys shall be set back as follows:
1. 9 ft. garage doors shall be at least 26 ft. from the back edge of the alley, or
2. 16 ft. garage doors shall be at least 24 ft. from the back edge of the alley.
pecial Setbacks for Animal Husbandry or Agricultural Related Structures
RC, R-1, R-4,
Agricultural related structures — 50 ft. from any property line.
R-6, R-8, R-
Stables and other animal husbandry related structures, see RMC 4-4-010,
10, and R-14
Animal Keeping and Beekeeping Standards.
RMF
n/a
lear Vision Area
RC, R-1, R-4,
R-6, R-8, R-
In no case shall a structure over 42 in. in height intrude into the 20 ft. clear
10, R-14 and
vision area defined in RMC 4-11-030.
RMF
RITICAL AREAS
General
RC, R-1, R-4,
See RMC 4-3-050, Critical Areas Regulations, and 4-3-090, Shoreline Master
R-6, R-8, R-
Program Regulations.
10, and R-14
ORDINANCE NO. 6049
SECTION IV. Subsections 4-2-110.E.4 and 4-2-110.E.17 of the Renton Municipal Code
are amended as shown below. All other provisions in 4-2-110.E remain in effect and unchanged.
4. Allowed Projections into Setbacks:
a. Fireplace Structures, Windows: Fireplace structures, bay or garden
windows, enclosed stair landings, and similar structures as determined by the
Community and Economic Development Administrator may project twenty-four
inches (24") into any setback; provided, such projections are:
i. Limited to two (2) per facade.
ii. Not wider than ten feet (10').
b. Fences, Rockeries, and Retaining Walls: See RMC 4-4-040, Fences,
Hedges, and Retaining Walls.
c. Steps and Decks: Uncovered steps and decks not exceeding
eighteen inches (18") above the finished grade may project to any property line.
Uncovered steps and decks having no roof covering and not exceeding forty two
inches (42") high may be built within the front yard setback.
d. Eaves: Eaves and cornices may project up to twenty four inches
(24") into any required setback.
e. Porches and Stoops: May project into front setbacks up to eight
feet (8') and into side setbacks along a street up to five feet (5').
f. Overhead Weather Protection:
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ORDINANCE NO. 6049
i. Roofs and awnings situated above pedestrian entryways may
extend up to five feet (5') into a required setback and may extend no wider than
three feet (T) on either side of the entryway.
ii. Roofs or other structures providing relief from rain or sun (e.g.,
pergola) attached to the rear facade of the primary structure may intrude into rear
yard setbacks provided such roofs shall be setback a minimum of five feet (5') from
rear lot lines and shall meet the side yard setback requirement for primary
structures. The height and area of such roofs shall be regulated in the same
manner as detached accessory structures.
g. Accessibility Ramps: Ramps required for barrier -free access, and
meeting all Building Code requirements including slope and handrails, may intrude
into required setbacks. This exemption will be limited to the extent necessary to
meet the Building Code requirements.
h. Cisterns and Rain Barrels: Rain barrels, cisterns, and other
rainwater catchment systems may intrude into a required setback as follows:
i. Elements are not permitted in the front setback.
ii. Elements which are less than fifty-four inches (54") above
finished grade and contain up to six hundred (600) gallons may intrude into a side
or rear setback a distance no greater than twenty percent (20%) of that setback,
but must maintain at least three feet (T) of undisturbed setback.
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ORDINANCE NO. 6049
iii. Elements which are greater than fifty-four inches (54") above
finished grade or contain over six hundred (600) gallons shall not intrude upon
side and rear setback requirements.
i. Arbor, Pergola or Trellis: Allowed in required yard setbacks if they
meet the following provisions:
i. The length of any side shall not exceed twelve feet (12') and the
footprint shall not exceed eighty (80) square feet, inclusive of eaves;
ii. A maximum height from finished grade to the top of the
structure of ten feet (10');
iii. Both sides and roof shall be at least fifty percent (50%) open,
or, if latticework is used, there shall be a minimum opening of two inches (2")
between crosspieces.
iv. Limited to two (2) such structures per lot.
j. Heating, Ventilation, and Air Conditioning (HVAC) Systems: HVAC
Systems may extend into any side or rear yard setback.
17. The lot coverage of accessory dwelling units shall not be calculated
towards maximum building/lot coverage. Coverage attributed to detached
accessory structures, and roofs attached to the facade of the primary structure
may exceed the maximum building/lot coverage allowed by five percent (5%).
SECTION V. Subsection 4-6-030.0 of the Renton Municipal Code is amended as follows:
C. ADOPTION OF SURFACE WATER DESIGN MANUAL:
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ORDINANCE NO. 6049
The 2016 King County, Washington, Surface Water Design Manual as amended
by the City of Renton Amendments to the King County Surface Water Design
Manual, dated December 12, 2016, and further amended by the City on December
13, 2021, is adopted by reference and referred to hereafter as the Surface Water
Design Manual. The Surface Water Design Manual shall be filed with the City Clerk
and available for viewing on the City's website.
SECTION VI. The definition of "Building Height" in section 4-11-020 of the Renton
Municipal Code is amended as shown below. All other definitions in 4-11-020 remain in effect
and unchanged.
BUILDING HEIGHT: The measurement of building height depends on the
applicable zone, as follows:
1. Within the RC, R-1, R-4, R-6, R-8, R-10, R-14, and RMF Zones: Primary
structures and accessory dwelling units shall be measured by :the vertical
distance from grade plane to the highest wall plate combined with the height of
any portion of the structure that extends above the wall plate (e.g., roof, deck,
etc.), excluding chimneys, ventilation stacks, and similar elements as determined
by the Administrator. Detached accessory structures shall be measured by the
vertical distance from grade plane to the average height of the highest roof
surface.
2. All Other Zones: The vertical distance from grade plane to the average height
of the highest roof surface.
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ORDINANCE NO. 6049
SECTION VII. Table 1.2.9.A, On -site BMP Sizing Credits, on page 1-84 of the City of
Renton's Surface Water Design Manual, is hereby amended as shown below. All other provisions
in the City of Renton's Surface Water Design Manual remain in effect and unchanged.
TABLE ERROR! NO TEXT OF SPECIFIED STYLE IN DOCUMENT..A ON -SITE BMP SIZING
CREDITS(')
On -Site BMP Type
Sizing Credit
Full dispersion
Model fully dispersed surface as forest(2)
Full infiltration(3)
Subtract impervious area that is fully infiltrated
Limited infiltration
Model tributary impervious surface as 90% impervious, 10% grass
Basic dispersion
Model dispersed impervious surface as 90% impervious, 10% grass
Bioretention
Model tributary impervious surface as 90% impervious, 10% grass
Permeable pavement (unlined with
Model permeable pavement area as 50% impervious, 50% grass.
no underdrain)
Run-on from other impervious surfaces does not receive a credit.
Grassed modular grid pavement
Model modular grid pavement as all grass
Rainwater harvesting
Credit only allowed via, and as specified in, an approved drainage
adjustment that details conditions of use
Vegetated roof with 3 to 8 inches of
Model vegetated roof area as 50% impervious, 50% grass
growing medium
Vegetated roof with greater than
Model vegetated roof area as 50% impervious, 50% pasture
8 inches of growing medium
Restricted footprint
None
Wheel strip driveways
Model credited area as 50% impervious, 50% grass
Minimum disturbance foundation
Model foundation area as 50% impervious, 50% grass
Open grid decking over pervious
Model deck area as 50% impervious, 50% grass
area
Native growth retention credit I
Model mitigated impervious area as 50% impervious, 50% grass
Perforated pipe connection
None
Notes:
These credits do not apply when determining eligibility for exemptions from Core Requirement #3, Core Requirement #8,
or exceptions from the flow control or water quality facility requirements unless otherwise noted in the exemption or
exception. When applying modeling credits for flow control facility sizing, infiltrative BMPs tributary to the facility that are
included in the modeling scenario (including the permeable pavement element with area reduced to 50% impervious area
fraction, or other BMPs (e.g., bioretention, trenches, drywells) treating upstream runoff) must have the infiltration option
turned off during the flow routing analysis for facility sizing to avoid double -counting the BMP infiltration benefit.
Alternatively, permeable pavement with infiltration turned off may be represented by an impervious area land use element
of equivalent area.
(2) Surface shall be modeled using the soil type found at that location on the site.
(3) For any project subject to Simplified Drainage Review, and for any single family residential project subject to Directed,
Full or Large Project Drainage Review, the design requirements and specifications in Appendix C, Section C.2.2 may be
used for design of full infiltration on individual lots. For all other projects, including any project where full infiltration is
proposed to serve more than one lot, full infiltration must be designed in accordance with infiltration facility standards in
Section 5.2.
E
ORDINANCE NO. 6049
SECTION Vill. If any section, subsection, sentence, clause, phrase or work of this
ordinance should be held to be invalid or unconstitutional by a court or competent jurisdiction,
such invalidity or unconstitutionality thereof shall not affect the constitutionality of any other
section, subsection, sentence, clause, phrase or word of this ordinance.
SECTION IX. This ordinance shall be in full force and effect five (5) days after publication
of a summary of this ordinance in the City's official newspaper. The summary shall consist of this
ordinance's title.
PASSED BY THE CITY COUNCIL this 131h day of December, 2021.
APPROVED BY THE MAYOR this 13th day of December, 2021.
Approved as to form:
Shane Moloney, City Attorney
Date of Publication: 12/16/2021 (Summary)
ORD:2184:11/16/21
offi6Pavone, Mayor
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