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6049CITYOFRENTON,WASHINGTONORDINANCENO.6049ANORDINANCEOFTHECITYOFRENTON,WASHINGTON,AMENDINGRESIDENTIALACCESSORYSTRUCTURESREGULATIONSINSUBSECTIONS4-2-110.A,4-2-110.B,4-2-110.E.4,4-2-110.E.17,AND4-6-030.COFTHERENTONMUNICIPALCODE,THEDEFINITIONOF“BUILDINGHEIGHT”INSECTION4-11-020OFTHERENTONMUNICIPALCODE,ANDTABLE1.2.9.AOFTHECITYOFRENTON’SSURFACEWATERDESIGNMANUAL,PROVIDINGFORSEVERABILITY,ANDESTABLISHINGANEFFECTIVEDATE.WHEREAS,thismatterwasdulyreferredtothePlanningCommissionforinvestigationandstudy,andthematterwasconsideredbythePlanningCommission;andWHEREAS,pursuanttoRCW36.70A.106,onJuly30,2021,theCitynotifiedtheStateofWashingtonofitsintenttoadoptamendmentstoitsdevelopmentregulations;andWHEREAS,thePlanningCommissionheldapublichearingonAugust18,2021,consideredallrelevantmatters,andheardallpartiesinsupportoropposition,andsubsequentlyforwardedarecommendationtotheCityCouncil;NOW,THEREFORE,THECITYCOUNCILOFTHECITYOFRENION,WASHINGTON,DOORDAINASFOLLOWS:SECTIONI.AllportionsoftheRentonMunicipalCodeinthisordinancenotshowninstrikethroughandunderlineeditsremainineffectandunchanged.SECTIONII.Therowentitled“MinimumRearYard”insubsection4-2-110.AoftheRentonMunicipalCodeisamendedasshownintheexcerptof4-2-110.AinAttachmentA.Allotherprovisionsin4-2-110.Aremainineffectandunchanged.SECTIONIII.Subsection4-2-110.BoftheRentonMunicipalCodeisamendedasfollows:1 ORDINANCENO.60494-2-11O.BDEVELOPMENTSTANDARDSFORRESIDENTIALDEVELOPMENT(DETACHEDACCESSORYBUILDINGS)MAXIMUMNUMBERANDSIZELGeneraIRC,R-1,R-4,AccessorystructuresshallonlybeallowedonlotsinconjunctionwithaR-6,R-8,R-primaryuse.10,R-14andThetotalfloorareaofallaccessorybuildingsshallnotbegreaterthantheRMFfloorareaoftheprimaryresidentialuses.ThelotcoverageoftheprimaryresidentialstructurecombinedwithallaccessorybuildingsshallnotexceedthemaximumlotcoverageoftheZoningDistrict.RCandR-12structures—max.720sq.ft.perstructure,or1structure—max.1,000sq.ft.Inaddition,1barnorstable—max.2,000sq.ft.,providedthelotis5acresormore.R-4,R-6,and2structures—max.720sq.ft.perstructure,orR-81structure—max.1,000sq.ft.R-10andR-1structureperresidentialunit—max.400sq.ft.;provided,thattheyare14architecturallyconsistentwiththeprincipalstructure.Exceptgreenhouses,sheds,orothersimilaraccessorystructures—max.150sq.ft.MAXIMUMWALLPLATEHEIGHT’8”9RC12ft.R-1,R-4,R-12ft.6,andR-8AnimalhusbandryoragriculturalrelatedstructuresaresubjecttothemaximumwallplateheightofsubsectionAofthisSection,andassociatedconditions.Additionally,thestructureshallnotbetallerthantheprimarydwelling.R-10andR-12ft.142 ORDINANCENO.6049AgriculturalrelatedstructuresaresubjecttothemaximumwallplateheightofsubsectionAofthisSection,andassociatedconditions,exceptthatthestructureshallnotbetallerthantheprimarydwelling.RMF25ft.20,exceptthatthestructureshallnotbetallerthantheprimary_____________building(s).MaximumHeightforPublicFacilitiesshallbedeterminedthroughsiteplanreview.MaximumHeightforWirelessCommunicationFacilities(IncludingAmateurRadioAntennas)RC,R-1,R-4,SeeRMC4-4-140,WirelessCommunicationFacilities.FreestandingverticalR-6,R-$,R-monopoleamateurradioantennasareallowedamaximumheightof45ft.10,R-14,withoutaConditionalUsePermit.TallerstructureswillhavemaximumheightandRMFdeterminedpursuanttoRMC4-9-030,ConditionalUsePermits.EOCATIONLGeneraIRC,R-1,R-4,R-6,R-8,R-46ft.fromanyresidentialstructure.Ifsitedcloserthan46ft.,thestructure10,R-14andwill-shall_beconsideredtobeattached.RMFR-14Foranylotthatabutsanalley,vehicularaccesstogaragesorcarportsshallbethroughthealley.Whenlotsdonotabutanalley,allgaragesandcarportsshallbelocatedintherearyardorsideyard.MINIMUMSETBACKS[ront_YardRC,R-1,R-4R6R8RSetbacksappliedtotheprimarystructurealsoapplytoaccessorystructures.‘‘Accessorystructuresshallnotbelocatedbetweentheprimarystructureand10,R-14andastreet.4RMFide_Yards_forAccessoryBuildingsRCandR-15ft.,unlesslocatedbetweentherearofthehouseandtherearpropertyline,then0ft.sideyardisallowed.3 ORDINANCENO.6049R-4,R-6,R3ft.,unlesslocatedbetweentherearofthehouseandtherearpropertyline,8R-10,R-14then0ft.sideyardisallowed.andRMFLRear_YardsforAccessoryBuildingsRC5ft.R-1,R-4,R-3ft.,unlesslocatedbetweentherearofthehouseandtherearpropertyline,6,R-8,R-10,thenOft.rearyardisallowed.R-14andWhenlocatedwithinlOft,oftherearpropertyline,atleast25%ofthelinealRMFlengthoftherearyardshallremainunoccupiedfromaccessorystructures,exceptwhentherearpropertylineabutsanalley.Exceptforgarages/carportsaccessedthroughalleys:toensureadequatevehicularmaneuveringarea,garagesandcarportsthatareaccessedthroughalleysshallbesetbackasfollows:1.9ft.garagedoorsshallbeatleast26ft.fromthebackedgeofthealley,or2.16ft.garagedoorsshallbeatleast24ft.fromthebackedgeofthealley.[‘‘pecialSetbacksforAnimalHusbandryorAgriculturalRelatedStructuresRC,R-1,R-4,Agriculturalrelatedstructures—50ft.fromanypropertyline.R-6,R-8,R-Stablesandotheranimalhusbandryrelatedstructures,seeRMC4-4-010,10,andR-14AnimalKeepingandBeekeepingStandards.RMFn/aClearVisionAreaRC,R-1,R-4,R-6,R-8,R-Innocaseshallastructureover42in.inheightintrudeintothe20ft.clear10,R-14andvisionareadefinedinRMC4-11-030.RMFRlTICALAREASGeneralRC,R-1,R-4SeeRMC4-3-050,CriticalAreasRegulations,and4-3-090,ShorelineMasterR-6R-8RProgramRegulations.10,andR-144 ORDINANCENO.6049SECTIONIV.Subsections4-2-110.E.4and4-2-110.E.17oftheRentonMunicipalCodeareamendedasshownbelow.Allotherprovisionsin4-2-110.Eremainineffectandunchanged.4.AllowedProjectionsintoSetbacks:a.FireplaceStructures,Windows:Fireplacestructures,bayorgardenwindows,enclosedstairlandings,andsimilarstructuresasdeterminedbytheCommunityandEconomicDevelopmentAdministratormayprojecttwenty-fourinches(24”)intoanysetback;provided,suchprojectionsare:i.Limitedtotwo(2)perfacade.ii.Notwiderthantenfeet(10’).b.Fences,Rockeries,andRetainingWalls:SeeRMC4-4-040,Fences,Hedges,andRetainingWalls.c.StepsandDecks:Uncoveredstepsanddecksnotexceedingeighteeninches(18”)abovethefinishedgrademayprojecttoanypropertyline.Uncoveredstepsanddeckshavingnoroofcoveringandnotexceedingfortytwoinches(42”)highmaybebuiltwithinthefrontyardsetback.d.Eaves:Eavesandcornicesmayprojectuptotwentyfourinches(24”)intoanyrequiredsetback.e.PorchesandStoops:Mayprojectintofrontsetbacksuptoeightfeet(8’)andintosidesetbacksalongastreetuptofivefeet(5’).f.OverheadWeatherProtection:________________________________5 ORDINANCENO.6049i.Roofsandawningssituatedabovepedestrianentrywaysmayextenduptofivefeet(5’)intoarequiredsetbackandmayextendnowiderthanthreefeet(3’)oneithersideoftheentryway.ii.Roofsorotherstructuresprovidingrelieffromrainorsun(e.g.,pergola)attachedtotherearfacadeoftheprimarystructuremayintrudeintorearyardsetbacksprovidedsuchroofsshallbesetbackaminimumoffivefeet(5’)fromrearlotlinesandshallmeetthesideyardsetbackrequirementforprimarystructures.Theheightandareaofsuchroofsshallberegulatedinthesamemannerasdetachedaccessorystructures.g.AccessibilityRamps:Rampsrequiredforbarrier-freeaccess,andmeetingallBuildingCoderequirementsincludingslopeandhandrails,mayintrudeintorequiredsetbacks.ThisexemptionwillbelimitedtotheextentnecessarytomeettheBuildingCoderequirements.h.CisternsandRainBarrels:Rainbarrels,cisterns,andotherrainwatercatchmentsystemsmayintrudeintoarequiredsetbackasfollows:i.Elementsarenotpermittedinthefrontsetback.ii.Elementswhicharelessthanfifty-fourinches(54”)abovefinishedgradeandcontainuptosixhundred(600)gallonsmayintrudeintoasideorrearsetbackadistancenogreaterthantwentypercent(20%)ofthatsetback,butmustmaintainatleastthreefeet(3’)ofundisturbedsetback.6 ORDINANCENO.6049iii.Elementswhicharegreaterthanfifty-fourinches(54”)abovefinishedgradeorcontainoversixhundred(600)gallonsshallnotintrudeuponsideandrearsetbackrequirements.i.Arbor,PergolaorTrellis:Allowedinrequiredyardsetbacksiftheymeetthefollowingprovisions:i.Thelengthofanysideshallnotexceedtwelvefeet(12’)andthefootprintshallnotexceedeighty(80)squarefeet,inclusiveofeaves;ii.Amaximumheightfromfinishedgradetothetopofthestructureoftenfeet(10’);iii.Bothsidesandroofshallbeatleastfiftypercent(50%)open,or,iflatticeworkisused,thereshallbeaminimumopeningoftwoinches(2”)betweencrosspieces.iv.Limitedtotwo(2)suchstructuresperlot.j.Heating,Ventilation,andAirConditioning(HVAC)Systems:HVACSystemsmayextendintoanysideorrearyardsetback.17.Thelotcoverageofaccessorydwellingunitsshallnotbecalculatedtowardsmaximumbuilding/lotcoverage.Coverageattributedtodetachedaccessorystructures,androofsattachedtothefacadeoftheprimarystructuremayexceedthemaximumbuilding/lotcoverageallowedbyfivepercent(5%).SECTIONV.Subsection4-6-030.CoftheRentonMunicipalCodeisamendedasfollows:C.ADOPTIONOFSURFACEWATERDESIGNMANUAL:7 ORDINANCENO.6049The2016KingCounty,Washington,SurfaceWaterDesignManualasamendedbytheCityofRentonAmendmentstotheKingCountySurfaceWaterDesignManual,datedDecember12,2016,andfurtheramendedbytheCityonDecember13,2021,isadoptedbyreferenceandreferredtohereafterastheSurfaceWaterDesignManual.TheSurfaceWaterDesignManualshallbefiledwiththeCityClerkandavailableforviewingontheCity’swebsite.SECTIONVI.Thedefinitionof“BuildingHeight”insection4-11-020oftheRentonMunicipalCodeisamendedasshownbelow.Allotherdefinitionsin4-11-020remainineffectandunchanged.BUILDINGHEIGHT:Themeasurementofbuildingheightdependsontheapplicablezone,asfollows:1.WithintheRC,R-1,R-4,R-6,R-8,R-1O,R-14,andRMFZones:Primarystructuresandaccessorydwellingunitsshallbemeasuredbytheverticaldistancefromgradeplanetothehighestwallplatecombinedwiththeheightofanyportionofthestructurethatextendsabovethewallplate(e.g.,roof,deck,etc.),excludingchimneys,ventilationstacks,andsimilarelementsasdeterminedbytheAdministrator.Detachedaccessorystructuresshallbemeasuredbytheverticaldistancefromgradeilanetotheaverageheightofthehighestroofsurface.2.AllOtherZones:Theverticaldistancefromgradeplanetotheaverageheightofthehighestroofsurface.8 ORDINANCENO.6049SECTIONVII.Table1.2.9.A,On-siteBMPSizingCredits,onpage1-84oftheCityofRenton’sSurfaceWaterDesignManual,isherebyamendedasshownbelow.AllotherprovisionsintheCityofRenton’sSurfaceWaterDesignManualremainineffectandunchanged.TABLEERROR!NOTEXTOFSPECIFIEDSTYLEiNDOCUMENT..AON-SITEBMPSIZINGCREDITSt1On-SiteBMPTypeSizingCreditFulldispersionModelfullydispersedsurfaceasforest2Fullinfiltration13SubtractimperviousareathatisfullyinfiltratedLimitedinfiltrationModeltributaryimpervioussurfaceas90%impervious,10%grassBasicdispersionModeldispersedimpervioussurfaceas90%impervious,10%grassBioretentionModeltributaryimpervioussurfaceas90%impervious,10%grassPermeablepavement(unlinedwithModelpermeablepavementareaas50%impervious,50%grass.nounderdrain)Run-onfromotherimpervioussurfacesdoesnotreceiveacredit.GrassedmodulargridpavementModelmodulargridpavementasallgrassRainwaterharvestingCreditonlyallowedvia,andasspecifiedin,anapproveddrainageadjustmentthatdetailsconditionsofuseVegetatedroofwith3to8inchesofModelvegetatedroofareaas50%impervious,50%grassgrowingmediumVegetatedroofwithgreaterthanModelvegetatedroofareaas50%impervious,50%pasture8inchesofgrowingmediumRestrictedfootprintNoneModelfootprintasrestricted(AppendixC,SectionC.2.9.2)WheelstripdrivewaysModelcreditedareaas50%impervious,50%grassMinimumdisturbancefoundationModelfoundationareaas50%impervious,50%grassOpengriddeckingoverperviousModeldeckareaas50%impervious,50%grassareaNativegrowthretentioncreditModelmitigatedimperviousareaas50%impervious,50%grassPerforatedpipeconnectionNoneNotes:(1)ThesecreditsdonotapplywhendeterminingeligibilityforexemptionsfromCoreRequirement#3,CoreRequirement#8,orexceptionsfromtheflowcontrolorwaterqualityfacilityrequirementsunlessotherwisenotedintheexemptionorexception.Whenapplyingmodelingcreditsforflowcontrolfacilitysizing,infiltrativeBMPstributarytothefacilitythatareincludedinthemodelingscenario(includingthepermeablepavementelementwithareareducedto50%imperviousareafraction,orotherBMPs(e.g.,bioretention,trenches,drywells)treatingupstreamrunoff)musthavetheinfiltrationoptionturnedoffduringtheflowroutinganalysisforfacilitysizingtoavoiddouble-countingtheBMPinfiltrationbenefit.Alternatively,permeablepavementwithinfiltrationturnedoffmayberepresentedbyanimperviousarealanduseelementofequivalentarea.(2)Surfaceshallbemodeledusingthesoiltypefoundatthatlocationonthesite.(3)ForanyprojectsubjecttoSimplifiedDrainageReview,andforanysinglefamilyresidentialprojectsubjecttoDirected,FullorLargeProjectDrainageReview,thedesignrequirementsandspecificationsinAppendixC,SectionC.2.2maybeusedfordesignoffullinfiltrationonindividuallots,Forallotherprojects,includinganyprojectwherefullinfiltrationisproposedtoservemorethanonelot,fullinfiltrationmustbedesignedinaccordancewithinfiltrationfacilitystandardsinSection5.2.9 ORDINANCENO.6049SECTIONVIII.Ifanysection,subsection,sentence,clause,phraseorworkofthisordinanceshouldbeheldtobeinvalidorunconstitutionalbyacourtorcompetentjurisdiction,suchinvalidityorunconstitutionalitythereofshallnotaffecttheconstitutionalityofanyothersection,subsection,sentence,clause,phraseorwordofthisordinance.SECTIONIX.Thisordinanceshallbeinfullforceandeffectfive(5)daysafterpublicationofasummaryofthisordinanceintheCity’sofficialnewspaper.Thesummaryshallconsistofthisordinance’stitle.PASSEDBYTHECITYCOUNCILthis13thdayofDecember,2021.Jaso/A.SethClerkAPPROVEDBYTHEMAYORthis13thdayofDecember,021.Approvedastoform:s%-eShaneMoloney,CityAttorneyDateofPublication:12/16/2021(Summary)ORD:2184:11/16/21Pavone,Mayor10 ORDINANCE NO.6049 AUACHMENT A [EXCERPT OF 4-2-11O.AJ 4-2-11OA’DEVELOPMENT STANDARDS FOR RESIDENTIAL ZONING DESIGNATIONS (PRIMARY STRUCTURES) RC Ri32 R-410’32 R-6 R-8 R-1O R-14 RMF Minimum Rear Yard4’35 30 25 ft.33 25 ft.25-0 15 ft.2’10 ft.21’Townhouses:10 ft.’339 22,31 ft.ft.ft.39 Other Attached Dwellings:15 ft.39 11