| IRS990EZ/ActivitiesNotPreviouslyRptInd | 0 | 0 |
| IRS990EZ/AddressChangeInd | 0 | X |
| IRS990EZ/BenefitsPaidToOrForMembersAmt | 0 | 0 |
| IRS990EZ/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | Green Builder Coalition |
| IRS990EZ/BooksInCareOfDetail/PhoneNum | 0 | 5159917498 |
| IRS990EZ/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1435 SE Traden Dr |
| IRS990EZ/BooksInCareOfDetail/USAddress/CityNm | 0 | Waukee |
| IRS990EZ/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | IA |
| IRS990EZ/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 502638433 |
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| IRS990EZ/CashSavingsAndInvestmentsGrp/EOYAmt | 0 | 29098 |
| IRS990EZ/ChgMadeToOrgnzngDocNotRptInd | 0 | 0 |
| IRS990EZ/ContributionsGiftsGrantsEtcAmt | 0 | 0 |
| IRS990EZ/CostOfGoodsSoldAmt | 0 | 0 |
| IRS990EZ/CostOrOtherBasisExpenseSaleAmt | 0 | 0 |
| IRS990EZ/DirectIndirectPltclExpendAmt | 0 | 0 |
| IRS990EZ/DonorAdvisedFndsInd | 0 | 0 |
| IRS990EZ/ExcessOrDeficitForYearAmt | 0 | -64485 |
| IRS990EZ/FeesAndOtherPymtToIndCntrctAmt | 0 | 10595 |
| IRS990EZ/ForeignFinancialAccountInd | 0 | 0 |
| IRS990EZ/ForeignOfficeInd | 0 | 0 |
| IRS990EZ/Form1120PolFiledInd | 0 | 0 |
| IRS990EZ/Form990TotalAssetsGrp/BOYAmt | 0 | 58376 |
| IRS990EZ/Form990TotalAssetsGrp/EOYAmt | 0 | 62371 |
| IRS990EZ/FundraisingGrossIncomeAmt | 0 | 0 |
| IRS990EZ/GainOrLossFromSaleOfAssetsAmt | 0 | 0 |
| IRS990EZ/GamingGrossIncomeAmt | 0 | 0 |
| IRS990EZ/GrantsAndSimilarAmountsPaidAmt | 0 | 0 |
| IRS990EZ/GrossProfitLossSlsOfInvntryAmt | 0 | 0 |
| IRS990EZ/GrossReceiptsAmt | 0 | 21874 |
| IRS990EZ/GrossSalesOfInventoryAmt | 0 | 0 |
| IRS990EZ/InfoInScheduleOPartIIInd | 0 | X |
| IRS990EZ/InfoInScheduleOPartIInd | 0 | X |
| IRS990EZ/InvestmentIncomeAmt | 0 | 0 |
| IRS990EZ/LandAndBuildingsGrp/BOYAmt | 0 | 0 |
| IRS990EZ/LandAndBuildingsGrp/EOYAmt | 0 | 0 |
| IRS990EZ/MadeLoansToFromOfficersInd | 0 | 0 |
| IRS990EZ/MembershipDuesAmt | 0 | 957 |
| IRS990EZ/MethodOfAccountingAccrualInd | 0 | X |
| IRS990EZ/NetAssetsOrFundBalancesBOYAmt | 0 | -719405 |
| IRS990EZ/NetAssetsOrFundBalancesEOYAmt | 0 | -783890 |
| IRS990EZ/NetAssetsOrFundBalancesGrp/BOYAmt | 0 | -719405 |
| IRS990EZ/NetAssetsOrFundBalancesGrp/EOYAmt | 0 | -783890 |
| IRS990EZ/OccupancyRentUtltsAndMaintAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 0 | 40 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 1 | 0.5 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 2 | 0.25 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 3 | 0.25 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 4 | 0.25 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt | 5 | 0.25 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 1 | 1275 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt | 5 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 0 | 52000 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/EmployeeBenefitProgramAmt | 5 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 0 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 1 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 2 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 3 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/ExpenseAccountOtherAllwncAmt | 4 | 0 |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 0 | Michael Collignon |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 1 | Katherine McLean |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 2 | Bill Lazar |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 3 | Ingrid Mattsson |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 4 | Steve Byers |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm | 5 | Kim Shanahan |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 0 | President |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 1 | Secretary/Treasurer |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 2 | Board Director, Ex Officio |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 3 | Board Director |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 4 | Board Director |
| IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt | 5 | Board Director |
| IRS990EZ/OperateHospitalInd | 0 | 0 |
| IRS990EZ/Organization501cInd | 0 | X |
| IRS990EZ/OrganizationDissolvedEtcInd | 0 | 0 |
| IRS990EZ/OrganizationHadUBIInd | 0 | 0 |
| IRS990EZ/OtherAssetsTotalDetail/BOYAmt | 0 | 30815 |
| IRS990EZ/OtherAssetsTotalDetail/EOYAmt | 0 | 33273 |
| IRS990EZ/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990EZ/OtherExpensesTotalAmt | 0 | 16007 |
| IRS990EZ/OtherRevenueTotalAmt | 0 | 0 |
| IRS990EZ/PoliticalCampaignActyInd | 0 | 0 |
| IRS990EZ/PrimaryExemptPurposeTxt | 0 | Green building promotion, representation & education |
| IRS990EZ/PrintingPublicationsPostageAmt | 0 | 81 |
| IRS990EZ/ProgramServiceRevenueAmt | 0 | 20917 |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 0 | Managed Housing 2.0 educational program. Over 250 students attended online. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 1 | Authored member periodicals. |
| IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt | 2 | Operated Water Efficiency Rating Score (WERS)(R) Program, which is used to predict water use for new and existing, single-family and multifamily residential properties. |
| IRS990EZ/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990EZ/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990EZ/SalariesOtherCompEmplBnftAmt | 0 | 59676 |
| IRS990EZ/SaleOfAssetsGrossAmt | 0 | 0 |
| IRS990EZ/ScheduleBNotRequiredInd | 0 | X |
| IRS990EZ/SpecialEventsDirectExpensesAmt | 0 | 0 |
| IRS990EZ/SpecialEventsNetIncomeLossAmt | 0 | 0 |
| IRS990EZ/StatesWhereCopyOfReturnIsFldCd | 0 | IL |
| IRS990EZ/SubjectToProxyTaxInd | 0 | 0 |
| IRS990EZ/SumOfTotalLiabilitiesGrp/BOYAmt | 0 | 777781 |
| IRS990EZ/SumOfTotalLiabilitiesGrp/EOYAmt | 0 | 846261 |
| IRS990EZ/TanningServicesProvidedInd | 0 | 0 |
| IRS990EZ/TotalExpensesAmt | 0 | 86359 |
| IRS990EZ/TotalProgramServiceExpensesAmt | 0 | 0 |
| IRS990EZ/TotalRevenueAmt | 0 | 21874 |
| IRS990EZ/TransactionWithControlEntInd | 0 | 0 |
| IRS990EZ/TypeOfOrganizationAssocInd | 0 | X |
| IRS990EZ/WebsiteAddressTxt | 0 | www.greenbuildercoalition.org |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | Description;Amount^Bank and Merchant Fees;601|Bus Registration Fees;115|Web Hosting;1094|Software and Computer Expense;28|Telephone Expense;160|Corporate Insurance;716|Dues and Subscriptions;263|Filing Fees;10|Airfare;2581|Ground Transportation;1386|Lodging;4688|Meals;608|Registration and Seminar Fees;346|Amortization Expense Website;3111|Amortization Expense WERS Website;300^Total;16007^ |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | Description;EOY Amount^Accounts Receivable;29295|PrePaid Corporate Insurance;517|Website;3461^Total;33273^ |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Description;EOY Amount^Accounts Payable;71025|Deferred Compensation Liability;718771|Interest Payable Deferred Comp;56465^Total;846261^ |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990-EZ, Part I, Line 16 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990-EZ, Part II, Line 24 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990-EZ, Part II, Line 26 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | Michael Collignon |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | President |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 6187916468 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2026-03-31 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | GREEN BUILDER COALITION |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | GREE |
| ReturnHeader/Filer/EIN | 0 | 273079282 |
| ReturnHeader/Filer/PhoneNum | 0 | 5159917498 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 7411 Creek Ridge Ln |
| ReturnHeader/Filer/USAddress/CityNm | 0 | Edwardsville |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | IL |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 62025 |
| ReturnHeader/Form8822BAttachedInd | 0 | X |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | 0 |
| ReturnHeader/ReturnTs | 0 | 2026-03-31T14:16:36-07:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990EZ |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2024-10-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2025-09-30 |
| ReturnHeader/TaxYr | 0 | 2024 |