﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" returnVersion="2023v5.0">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2024-04-24T17:54:20-04:00</ReturnTs>
    <TaxPeriodEndDt>2023-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>465555252</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Build Advisory Corporation</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>811 W 7th ST 12th Floor</AddressLine1Txt>
        <CityNm>Los Angeles</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>90017</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2023-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>844206103</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Coastside CERT</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>COAS</BusinessNameControlTxt>
      <USAddress>
        <AddressLine1Txt>1191 Main St</AddressLine1Txt>
        <CityNm>Half Moon Bay</CityNm>
        <StateAbbreviationCd>CA</StateAbbreviationCd>
        <ZIPCd>94019</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Cynthia Sherrill</PersonNm>
      <PersonTitleTxt>Treasurer</PersonTitleTxt>
      <PhoneNum>3104299197</PhoneNum>
      <SignatureDt>2024-04-24</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>Cynthia</PersonFirstNm>
        <PersonLastNm>Sherrill</PersonLastNm>
      </PersonFullName>
    </SigningOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>true</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>Mark Hancock CRTP</PreparerPersonNm>
      <PTIN>P00857085</PTIN>
      <PhoneNum>4159523695</PhoneNum>
      <PreparationDt>2024-04-24</PreparationDt>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <OOBSecurityVerificationCd>00</OOBSecurityVerificationCd>
        <AuthenticationAssuranceLevelCd>AAL2</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2023</TaxYr>
    <BuildTS>2023-04-26 12:10:37Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="3">
    <IRS990EZ documentId="IRS990EZ">
      <InitialReturnInd>X</InitialReturnInd>
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>coastsidecert.com</WebsiteAddressTxt>
      <Organization501c3Ind referenceDocumentId="990A">X</Organization501c3Ind>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>19772</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ContributionsGiftsGrantsEtcAmt>19610</ContributionsGiftsGrantsEtcAmt>
      <OtherRevenueTotalAmt>162</OtherRevenueTotalAmt>
      <TotalRevenueAmt>19772</TotalRevenueAmt>
      <GrantsAndSimilarAmountsPaidAmt>250</GrantsAndSimilarAmountsPaidAmt>
      <FeesAndOtherPymtToIndCntrctAmt>225</FeesAndOtherPymtToIndCntrctAmt>
      <PrintingPublicationsPostageAmt>1192</PrintingPublicationsPostageAmt>
      <OtherExpensesTotalAmt>8883</OtherExpensesTotalAmt>
      <TotalExpensesAmt>10550</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>9222</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>41729</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>25</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>50976</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIInd>X</InfoInScheduleOPartIIInd>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>41729</BOYAmt>
        <EOYAmt>50975</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <LandAndBuildingsGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </LandAndBuildingsGrp>
      <OtherAssetsTotalDetail>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>1</EOYAmt>
      </OtherAssetsTotalDetail>
      <Form990TotalAssetsGrp>
        <BOYAmt>41729</BOYAmt>
        <EOYAmt>50976</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>41729</BOYAmt>
        <EOYAmt>50976</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>Disaster preparedness education</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>Since the formation of our 501(c)(3) approximately 5 years ago, we have grown from 296 members, 56 CERTs, ... continued at Schedule O, Note .06</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>250</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>10295</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <TotalProgramServiceExpensesAmt>10295</TotalProgramServiceExpensesAmt>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>Cynthia Sherrill</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>10.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>David Cosgrave</PersonNm>
        <TitleTxt>President &amp; Board Chair</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>5.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>April Larsen</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>false</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>false</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>false</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>false</OrganizationDissolvedEtcInd>
      <Form1120PolFiledInd>false</Form1120PolFiledInd>
      <MadeLoansToFromOfficersInd>false</MadeLoansToFromOfficersInd>
      <EngagedInExcessBenefitTransInd>false</EngagedInExcessBenefitTransInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <StatesWhereCopyOfReturnIsFldCd>CA</StatesWhereCopyOfReturnIsFldCd>
      <BooksInCareOfDetail>
        <PersonNm>Cynthia Sherrill</PersonNm>
        <USAddress>
          <AddressLine1Txt>1191 Main St</AddressLine1Txt>
          <CityNm>Half Moon Bay</CityNm>
          <StateAbbreviationCd>CA</StateAbbreviationCd>
          <ZIPCd>94019</ZIPCd>
        </USAddress>
        <PhoneNum>3104299197</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <DonorAdvisedFndsInd>false</DonorAdvisedFndsInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <TanningServicesProvidedInd>false</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TransactionWithControlEntInd>false</TransactionWithControlEntInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <PartVIOfCompOfHghstPdEmplTxt>NONE</PartVIOfCompOfHghstPdEmplTxt>
      <PartVIHghstPdCntrctProfSrvcTxt>NONE</PartVIHghstPdCntrctProfSrvcTxt>
      <FiledScheduleAInd>true</FiledScheduleAInd>
    </IRS990EZ>
    <IRS990ScheduleA documentId="990A">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus3YearsAmt>9506</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19344</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>32747</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>19610</CurrentTaxYearAmt>
        <TotalAmt>81207</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus3YearsAmt>9506</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>19344</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>32747</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>19610</CurrentTaxYearAmt>
        <TotalAmt>81207</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>53167</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>28040</PublicSupportTotal170Amt>
      <OtherIncome170Grp>
        <CurrentTaxYearMinus1YearAmt>1000</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>161</CurrentTaxYearAmt>
        <TotalAmt>1161</TotalAmt>
      </OtherIncome170Grp>
      <TotalSupportAmt>82368</TotalSupportAmt>
      <PublicSupportCY170Pct>0.34040</PublicSupportCY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleO documentId="990O">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Description of other revenue Part I line 8</FormAndLineReferenceDesc>
        <ExplanationTxt>Description AmountAmazon Smile 27Refunds 135</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>List of grants and similar amounts paid Part I line 10</FormAndLineReferenceDesc>
        <ExplanationTxt>Activity Grants to organizations and individuals Amount 250</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Description of other expenses Part I line 16</FormAndLineReferenceDesc>
        <ExplanationTxt>Description AmountProgram supplies 3,525Insurance 1,486Subscriptions 1,249Coastside Gives fees 300Training Refund 1,166Community event 1,157</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Other changes in net assets or fund balances Part I line 20</FormAndLineReferenceDesc>
        <ExplanationTxt>Description AmountSavings account balance 25</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Description of other assets Part II line 24</FormAndLineReferenceDesc>
        <ExplanationTxt>Category Beginning of Year End of YearRounding Adjustment 0 1</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III response or note to any other line in Part III</FormAndLineReferenceDesc>
        <ExplanationTxt>Part III, line 28, Program Services Accomplishments, continued:... and 47 Ham radio operators in January 2019 to almost 2,300 members, including 445 CERTs, and 144 Hams today in 32 Coastside neighborhoods. In 2023, we graduated 68 CERTs. 5 Coastside CERTS (2 bilingual English/Spanish) trained to become certified Basic CERT/LISTOS instructors. 490 CERTs &amp; Coastside residents participated in Advanced CERT Training and Coastside-wide preparedness exercises. Organized CERT-led safety networks in 2 more neighborhoods, bringing our coverage to 30 of 32 total neighborhoods, and delivered emergency equipment to both of them. Coastside CERT participated in 5 civic events in 2023.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>