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Home My WebLink AboutOrdinance 26-036-CCBOARD OF COUNTY COMMISSIONERS Grant County, Washington ORDINANCE RELATING TO AN AMENDMENT TO THE UNIFIED DEVELOPMENT CODE CHAPTER ORDINANCE No. 26- 0 Yo -cc 23.08.020 — ACCESSORY USES AND STRUCTURES WHEREAS, Adequate accommodations have been made for agencies, individuals and interest groups to be heard and the Planning Commission has thoroughly considered the testimony in the record, and; WHEREAS, the proposed amendments are consistent with adopted Comprehensive Plan goals, objectives and policies, and do not create adverse impacts to offsite properties, and promote flexibility of property use, and; WHEREAS, the Board of County Commissioners have found that the proposal is consistent with the general purpose and intent of the Grant County Comprehensive Plan; and, WHEREAS, the Board of County Commissioners has found that, the UDC Amendment will serve the public use and interest, and; WHEREAS, Appropriate notice has been given to the Washington State Department of Commerce Growth Management Services in accordance with RCW 3 6.70A. 106, and; WHEREAS, the proposed amendments are consistent with the applicable portions of RCW' 36.70B, and; WHEREAS, Grant County Development Services Staff shall have the ability to modify the approved development code text to ensure proper formatting, spelling, etc. as well as correct any errors that may be discovered, and; WHEREAS, the Planning Commission conducted a public hearing on March 18, 2026, and recommended to the Board of County Commissioners approval of the proposed code amendments, and; WHEREAS, the Board of County Commissioners held a pre -decision open record public hearing to consider the recommendation of the Planning Commission on May 19, 2026. NOW, THEREFORE, BE IT HEREBY ORDAINED THAT the Grant County Board of Commissioners ADOPT the attached amendments to Grant County Unified Development Code Chapter 23.08.020 — Accessory Uses & Structures; and P26-0054 — Accessory Uses and Structures Amendment Ordinance BE IT ALSO FURTHER ORDAINED that the effective time and date for these amendments shall be 5:00 p.m. on the date of BOCC signature. DATED this day of , 2026. GQ 0 NTj' %: cnSEA - ` Cn svoo SMOGTO1 ATTEST: C/ aitlin Manell Clerk of the Board BOARD OF COUNTY COMMISSIONERS Yea Nay Abstain GRANT COUNTY, WASHINGTON LE L Kevin R. Burgess, air El Rb ice Chair 4 El Cindy ter, Member P26-0054 — Accessory Uses and Structures Amendment Ordinance DEVELOPMENT SERVICES DEPARTMENT GRANT COUNTY 264 Division Avenue W PO Box 37 WASHINGTON Ephrata, WA 98823 3 m APPENDIX A PLANNING DIVISION (509) 754-2011 Ext. 2501 PlanningDivision@grantcountywa.gov PROPOSED DRAFT Revised Mar-Gh-May 19M, 2026 Grant County UDC 23.08.020 Accessory Uses and Structures Subsection (c) ® Accessory Dwelling Units (ADU) a. The standards in this subsection apply to all accessory dwellina units established under subsections (c)(b) and (c)(c) of this section. (1) Accessory dwelling units (ADU) are additional smaller, subordinate residential dwelling units located on the same lot as a legally established principal unit. An accessory dwelling unit may be an attached accessory dwelling unit (AADU), located either within the same building or attached to the principal unit, or a detached accessory dwelling unit (DADU) detached from the principal unit. ADUs are intended to increase the supply of a greater range of housing types in zoning districts with residential capacity. (2) Subject to the requirements of this section, a manufactured or modular home, including park model RV's, can be considered an ADU. All other recreational vehicles are prohibited from being used as an ADU. (3) All accessory dwelling units shall be occupied as permanent residences and may not be used, rented, or leased as transient short-term rentals (periods of less than thirty (30) consecutive days). (4) Accessory dwelling units shall be subject to the water supply requirements of RCW 19.27.097 and any groundwater mitigation requirements adopted by the County or Department of Ecology. (5) The combined water withdrawal for the accessory dwelling unit, the principal unit, and any other domestic uses on the parcel may not exceed the use limitations in RCW 90.44.050 for domestic use. (6) The applicant must provide documentation that the existing or proposed sewage or septic system is capable of handling the additional demand placed upon it by the accessory dwelling unit. An ADIJ is limited to one thousand twelve hundred ninety-six 11 2QG) cznl -arp- f is srrmall�r (9)LZLThe "gross floor area" means the interior habitable area of a dwelling unit including basements and attics (Figure 7). Gross floor area excludes garages, porches, unfinished basements, or accessory structures. (9)L�LThe entire basement floor area of a principal unit may be utilized as an attached accessory dwelling unit (AADU), provided: (A) The AADU has a separate exterior entrance; (B) There is no internal access or connectivity between the AADU and the principal unit; and (C) The gross floor area of the basement AADU does not exceed the gross floor area of the main floor of the principal unit. (D) A basement AADU may be exempt from the fifty-five (55) percent threshold per GCC 23.08.020(a)(6), however in no event shall the basement AADU exceed twelve hundred ninety-six (1,296) square feet (Figure 5). ®Detached accessory dwelling units must be sited within 150 feet of the principal unit. (10) Accessory dwelling units must utilize the same driveway or other means of ingress and egress as the principal unit. (11) A detached accessory dwelling unit may be the existing principal unit if the existing principal unit meets the requirements of this subsection, is a single-family dwelling unit, and a new principal unit that is a single-family dwelling unit is constructed on the same parcel. (12) ADUs are exempt from on -site and off -site parking requirements. b. Accessory dwelling units within an urban qrowth area are subiect to the aeneral requirements in subsection (c)(a) of this section and the following additional standards: -3)LI) _Accessory dwelling units may be allowed in any district within an urban growth area that allow for single-family dwellings and sited on a lot developed with an existing or planned single-family detached dwelling, duplex, triplex, or other housing unit, subject to the requirements of this section. {(4)(2) _Accessory dwelling units may only be allowed on lots that meet the minimum lot size required for the principal unit. {455, N, (3) A maximum of two accessory dwelling units are permitted on a lot containing a principal unit in the following configurations: (A) Two attached accessory dwelling units (Figure 1); (B) Two detached accessory dwelling units, which may be comprised of one or two detached structures (Figure 2); or (C) One attached accessory dwelling unit and one detached accessory dwelling unit (Figure 3). (4) An ADU can be no less than one hundred ninety-two (192) square feet and a maximum of one thousand (1,000) square feet. { 0) For ADUs the Density, Dimension, and Open Space Standards of GCC 23.12 for the underlying zone are modified as follows: (A) The maximum lot coverage can be increased by five (5) percent beyond the threshold identified for the underlying zone, however this does not exempt an ADU from meeting SMP lot coverage standards found in GCC 24.12; and (B) An existing structure that does not meet current setbacks or lot coverage requirements may be converted into an accessory dwelling unit, provided that the Administrative Official may impose additional conditions for approval necessary to ensure public health, safety, and welfare. UDC 23.08.020 Amendment Page 12 c. Accessory dwelling units outside an urban growth area are subject to the general requirements in subsection (c)(a) of this section and the following additional standards: �-W)1 Accessory dwelling units may be allowed in any district within unincorporated areas of Grant County that allow for single-family dwellings and sited on a lot developed with an existing or planned single-family detached dwelling, subject to the requirements of this section. (44)(2) No parcel shall have more than one accessory dwelling unit (ADU), whether attached (AADU) or detached (DADU) (Figures 4 and 5). (3) An ADU can be no less than one hundred ninety-two (192) square feet, while the maximum size per ADU is one thousand two hundred ninety-six (1,296) square feet or not more than 55) percent of the total floor area of the principal unit, whichever is smailer,9-F-R�enn 8 Formatted: Font: Bold�� r--wh-i, "eye - s sma4W. In no case shall an ADU exceed 1,296 square feet. essopi dIn fPIlir9-' i I RF� # F�z�te�r�-�r� o driveway r)w_nt-vim rG,r i��n r of irrvr�� ar%r1 arvrocci��ir»I (24)L4h Detached accessory dwelling units (DADU) are prohibited on lots that do not meet the minimum required lot area, pursuant to the Density, Dimension, and Open Space Standards of GCC 23.12 for the underlying zone. The following prohibitions also apply: (A) Detached accessory dwelling units are prohibited on nonconforming lots under one acre in any zone. (B) Detached accessory dwelling units are prohibited on lots in the Rural Residential 1 (RR1) Zone that are less than five acres in size; and (C) A manufactured or modular home may be utilized as a detached accessory dwelling unit (DADU) on lots equal to or greater than 10 acres, provided: (i) The gross floor area of the manufactured or modular home does not exceed the gross floor area of the principal unit. (ii) The manufactured or modular home may be exempt from the fifty-five (55) percent threshold per GCC 23.08.020(ca)(26), however in no event shall a manufactured or modular DADU exceed twelve hundred ninety-six (1,296) square feet. (The applicant shall record the permit issued for a detached accessory dwelling unit (DADU) with the Grant County Auditor's Office. Recording fee shall be paid by the applicant. The permit shall include a statement that the accessory dwelling may not be sold as a separate residence until such time as the accessory dwelling is located as the sole residence on a legally established separate tax lot. _- Formatted: Font: (Default) Arial - �I -f Formatted: Strikethrough �0� s and their f ni4ies - - - - - - - - - - e. f_i_oTatted: List Paragraph in Tables 3 .4 and --a vided-belew: LlA- Fer leqa�I� larger thaR five (5) aGFeS and less than tweety- 0) aGreS, ()Re 44� farm URit is allewed, UDC 23.08.020 Amendment Page 13 Li rglai.i. r♦ • a ♦ a . . . . . . 1 .• i. a ip r f a i♦ / r a r • tlLw-v .a.i��r„rL�ri►.�+c.�z.ra. .' • �'j I i • i . r 0 . r r �. • ii •. = i ♦._ZEN-d.16KUWAKELUM- r i a i• ♦ �# i r i �� i r 1 i i• � is ra ra r r FM man- - a M a IS a a r f r _ r r a ii i s i i i i i s ra • '.tea ii •• a + r •• rra♦ ♦r ii • i a is •a r a !! �� i s IU i w+ r rr ii ♦ a a04 NNML=i r r a a �a r � i♦ r � f. �. i i a • . MffVlff6 'I • -i IF .Molt i . UDC 23.08,020 Amendment Page 14 FIGURE 1. UNINCORPORATED UCLA Attached Accessory Dwelling Unit(s) (AADU) within or attached to the Principal Dwelling Unit AADU I PRINCIPAL I AADU 1 DWELLING UNIT 2 Either one (1) or two (2) Attached Accessory Dwelling Units(s) may be attached or within principal unit it Shared Driveway UDC 23.08.020 Amendment Page 15 FIGURE 2. UNINCORPORATED UGA Principal Dwelling Unit with Detached Accessory Dwelling Unit(s) (DADU) DADU I Within 150'Feet Max. Shared Driveway DADU 2 Within 150 Feet Max. PRINCIPAL DWELLING UNIT Either one (1) or two (2) detached structures from principal unit UDC 23.08.020 Amendment Page 16 FIGURE 3. UNINCORPORATED UGA Principal Dwelling Unit with ONE Attached (AADU) and ONE Detached Accessory Dwelling Unit (DADU) ."AADU I PRINCIPAL DWELLING UNIT Within ISO, Feet Max.. Mum DADU 2 One (1) Attached Accessory Dwelling Unit Shared 11 and one (1) Detached Accessory Dwelling Deway 1 Unit from prineipal unit riv UDC 23.08.020 Amendment Page 17 FIGURE 4. UNICORPORATED RURAL Attached Accessory Dwelling Unit (AADU) within or attached to the Principal Dwelling Unit UDC 23.08.020 Amendment Page 18 FIGURE 5. UNICORPORATED RURAL Principal Dwelling Unit with a Detached Accessory Dwelling Unit (DADU) PRINCIPAL DWELLING UNIT Within 150 Feet Max. DADU I Total AU floor area limited to Shared 1,296 sq. ft. or 55% of principal Driveway unit floor area, whichever is SMALLER. UDC 23.08.020 Amendment Page 19 FIGURE 6. UNICORPORATED UGA or RURAL Attached Accessory Dwelling Unit(s) (AADU) within the Basement of a Principal Dwelling Unit PRINCIPAL DWELLING UNIT r BASEMENT AADU 1,296 sq. ft. max. FIGURE 7. UNICORPORATED UGA or RURAL `Gross Floor Area' for a Principal Dwelling Unit Gross floor area - Included: interior habitable area, Xe finished basement, _ {� J f finished attic Zv- F1 "Yon, . ..... X 0 Gross floor area - excluded,.-. garage, porches, unfinished basement, accessory stru ctu res <— Unfinished basement UDC 23.08.020 Amendment Page 110