Liabilities / Assets
22nd percentile
Higher debt load relative to assets than 22% of similar nonprofits.
EIN 94-6104011 • 501(c)3 • Tiburon, CA
Profile
Preservation and conservation of local historical buildings and making the buildings available for public access
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
22nd percentile
Higher debt load relative to assets than 22% of similar nonprofits.
Liabilities / Revenue
52nd percentile
Higher debt load relative to revenue than 52% of similar nonprofits.
Net Margin
6th percentile
Higher net margin than 6% of similar nonprofits.
Top Officer Pay
23rd percentile
Higher top officer pay than 23% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
48th percentile
Faster asset growth than 48% of similar nonprofits.
Revenue Growth
9th percentile
Faster revenue growth than 9% of similar nonprofits.
Assets
Up$4,903,404
Up $276,033 (+6.0%) from 2023
Liabilities
Up$55,566
Up $13,160 (+31%) from 2023
Net Assets
Up$4,847,838
Up $262,873 (+5.7%) from 2023
Revenue
Down$535,586
Down $173,476 (-24%) from 2023
Expenses
Up$486,609
Up $11,789 (+2.5%) from 2023
Net Income
Down$48,977
Down $185,265 (-79%) from 2023
Most recent year
2024 • Form 990Detailed filing. Detailed filing data is available for this year.
Preservation and conservation of local historical buildings and making the buildings available for public access
Preservation of local landmarks
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Rtn Earn Endowment Incm Other Fnds | $4,584,965 | $4,847,838 | ▲ $262,873 |
| Land, Buildings, and Equipment, Net | $2,360,663 | $2,360,722 | ▲ $59 |
| Investments in Publicly Traded Securities | $1,697,737 | $2,131,962 | ▲ $434,225 |
| Savings and Temporary Cash Investments | $531,679 | $373,428 | ▼ $158,251 |
| Inventories for Sale or Use | $36,242 | $36,242 | → $0 |
| Pd in Cap Srpls Land Bldg Eqp Fund | $0 | $0 | → $0 |
| Cap Stk Tr Prin Current Funds | $0 | $0 | → $0 |
| Total Assets | $4,627,371 | $4,903,404 | ▲ $276,033 |
| Other Assets Total | $1,050 | $1,050 | → $0 |
| Liabilities | |||
| Other Liabilities | $42,406 | $55,566 | ▲ $13,160 |
| Total Liabilities | $42,406 | $55,566 | ▲ $13,160 |
| Net Assets / Fund Balance | |||
| Total Net Assets Fund Balance | $4,584,965 | $4,847,838 | ▲ $262,873 |
| Total Liabilities and Net Assets / Fund Balance | $4,627,371 | $4,903,404 | ▲ $276,033 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $1,655,772 | $120,435 | $1,776,207 |
| Land | $704,950 | - | $704,950 |
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Patricia a Flax | Executive Director | FT | $91,415 | $91,415 |
| Name | Title |
|---|---|
| Phil Cassou | President |
| Bob Harrison | Board Member |
| Eva Buxton | Board Member |
| Mark Freiberg | Board Member |
| Peter Brooks | Board Member |
| Suzanne White | Board Member |
| Brooke Halsey | Co-treasurer |
| Jim Allen | Co-treasurer |
| Helen Lindqvist | Secretary |
| Line Item | Amount |
|---|---|
| Other Expenses | $330,253 |
| Salaries, Compensation, and Employee Benefits | $156,356 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $28,800 | $87,160 | - | $115,960 |
| Occupancy | - | $57,681 | - | $57,681 |
| Payroll Taxes | - | $40,396 | - | $40,396 |
| All Other Expenses | $26,581 | $10,257 | - | $36,838 |
| Advertising | - | $30,035 | - | $30,035 |
| Insurance | - | $27,687 | - | $27,687 |
| Other Expenses | $17,498 | - | - | $17,498 |
| Fees for Services Accounting | - | $10,280 | - | $10,280 |
| Office Expenses | $5,496 | $3,765 | - | $9,261 |
| Information Technology | - | $5,229 | - | $5,229 |
| Fees for Services Other | - | $995 | - | $995 |
| Total Functional Expenses | $213,124 | $273,485 | $0 | $486,609 |
| Line Item | Amount |
|---|---|
| Fundraising Gross Income | $29,230 |
| Fundraising Direct Expenses | $0 |
| Professional Fundraising Fees | $0 |
| Event | Gross Receipts | Gross Revenue | Direct Expenses | Net Income |
|---|---|---|---|---|
| Holiday Arts and Crafts | $4,054 | $4,054 | - | $4,054 |
| Float Your Boat | $3,705 | $3,705 | - | $3,705 |
| Total Events | $29,230 | $29,230 | - | $29,230 |
| Liability | Amount |
|---|---|
| Capital Expense Reserve | $45,891 |
| Security Deposits | $9,675 |
“Provided to board for review”
“Documents are available for inspection in the business office”
“Records are availabe for inspection at the business office”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | PRESERVATION OF LOCAL LANDMARKS |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 30035 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 30035 |
| IRS990/AllOtherContributionsAmt | 0 | 282585 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 10257 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 26581 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 36838 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | BEL-TIB LANDMARK SOCIETY |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 4154351853 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 1550 TIBURON BLVD |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | TIBURON |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94920 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/BOYAmt | 0 | 0 |
| IRS990/CapStkTrPrinCurrentFundsGrp/EOYAmt | 0 | 0 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 0 |
| IRS990/CompensationProcessOtherInd | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 0 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/CostOfGoodsSoldAmt | 0 | 8486 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 282585 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 0 |
| IRS990/CYOtherExpensesAmt | 0 | 330253 |
| IRS990/CYOtherRevenueAmt | 0 | 36876 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 216125 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | 48977 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 156356 |
| IRS990/CYTotalExpensesAmt | 0 | 486609 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 535586 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 0 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/Desc | 0 | PRESERVATION OF LOCAL LANDMARKS |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 0 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 0 |
| IRS990/ElectionOfBoardMembersInd | 0 | 0 |
| IRS990/EmployeeCnt | 0 | 0 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 213124 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 10280 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 10280 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 995 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 995 |
| IRS990/ForeignActivitiesInd | 0 | 0 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | PHIL CASSOU |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | HELEN LINDQVIST |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | JIM ALLEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | BROOKE HALSEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | PETER BROOKS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | EVA BUXTON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | BOB HARRISON |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | SUZANNE WHITE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | MARK FREIBERG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | PATRICIA A FLAX |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 91415 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | SECRETARY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | CO-TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | CO-TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | BOARD MEMBER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | EXECUTIVE DIRECTOR |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1957 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedInd | 0 | 0 |
| IRS990/FundraisingActivitiesInd | 0 | 1 |
| IRS990/FundraisingDirectExpensesAmt | 0 | 0 |
| IRS990/FundraisingGrossIncomeAmt | 0 | 29230 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 9 |
| IRS990/GrantsToIndividualsInd | 0 | 0 |
| IRS990/GrantsToOrganizationsInd | 0 | 0 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossReceiptsAmt | 0 | 544072 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 15882 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 0 |
| IRS990/IndependentVotingMemberCnt | 0 | 9 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 5229 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 5229 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 27687 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 27687 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 36242 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 36242 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 1697737 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 2131962 |
| IRS990/IRPDocumentCnt | 0 | 0 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 120435 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 2360663 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 2360722 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 2481157 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 0 |
| IRS990/LocalChaptersInd | 0 | 0 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 0 |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | PRESERVATION AND CONSERVATION OF LOCAL HISTORICAL BUILDINGS AND MAKING THE BUILDINGS AVAILABLE FOR PUBLIC ACCESS |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 0 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 4584965 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 4847838 |
| IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt | 0 | 29230 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 29230 |
| IRS990/NetIncomeOrLossGrp/RelatedOrExemptFuncIncomeAmt | 0 | 7396 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 7396 |
| IRS990/NetUnrelatedBusTxblIncmAmt | 0 | 0 |
| IRS990/NetUnrlzdGainsLossesInvstAmt | 0 | 213896 |
| IRS990/NondeductibleContributionsInd | 0 | 0 |
| IRS990/OccupancyGrp/ManagementAndGeneralAmt | 0 | 57681 |
| IRS990/OccupancyGrp/TotalAmt | 0 | 57681 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 3765 |
| IRS990/OfficeExpensesGrp/ProgramServicesAmt | 0 | 5496 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 9261 |
| IRS990/OfficerMailingAddressInd | 0 | 0 |
| IRS990/OperateHospitalInd | 0 | 0 |
| IRS990/Organization501c3Ind | 0 | X |
| IRS990/OrgDoesNotFollowFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/BOYAmt | 0 | 1050 |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 1050 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | MAINTENANCE & REPAIR |
| IRS990/OtherExpensesGrp/Desc | 1 | RENTAL COMMISSIONS |
| IRS990/OtherExpensesGrp/Desc | 2 | PROGRAM EXPENSE |
| IRS990/OtherExpensesGrp/Desc | 3 | LANDSCAPING |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 70227 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 43838 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 20684 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 17498 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 70227 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 43838 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 20684 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 17498 |
| IRS990/OtherLiabilitiesGrp/BOYAmt | 0 | 42406 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 55566 |
| IRS990/OtherRevenueMiscGrp/Desc | 0 | MISC |
| IRS990/OtherRevenueMiscGrp/RelatedOrExemptFuncIncomeAmt | 0 | 250 |
| IRS990/OtherRevenueMiscGrp/TotalRevenueColumnAmt | 0 | 250 |
| IRS990/OtherRevenueTotalAmt | 0 | 250 |
| IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt | 0 | 87160 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 28800 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 115960 |
| IRS990/PartialLiquidationInd | 0 | 0 |
| IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt | 0 | 40396 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 40396 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/BOYAmt | 0 | 0 |
| IRS990/PdInCapSrplsLandBldgEqpFundGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | PATTY FLAX |
| IRS990/ProfessionalFundraisingInd | 0 | 0 |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 532000 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | PROPERTY RENTAL FEES |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 216125 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 216125 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | 0 |
| IRS990/PYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/PYContributionsGrantsAmt | 0 | 546646 |
| IRS990/PYExcessBenefitTransInd | 0 | 0 |
| IRS990/PYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/PYInvestmentIncomeAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 315350 |
| IRS990/PYOtherRevenueAmt | 0 | 35066 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 127350 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | 234242 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 159470 |
| IRS990/PYTotalExpensesAmt | 0 | 474820 |
| IRS990/PYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/PYTotalRevenueAmt | 0 | 709062 |
| IRS990/QuidProQuoContributionsInd | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 48977 |
| IRS990/RelatedEntityInd | 0 | 0 |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | 0 |
| IRS990/ReportInvestmentsOtherSecInd | 0 | 0 |
| IRS990/ReportLandBuildingEquipmentInd | 0 | 1 |
| IRS990/ReportOtherAssetsInd | 0 | 0 |
| IRS990/ReportOtherLiabilitiesInd | 0 | 1 |
| IRS990/ReportProgramRelatedInvstInd | 0 | 0 |
| IRS990/RevenueAmt | 0 | 223771 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/BOYAmt | 0 | 4584965 |
| IRS990/RtnEarnEndowmentIncmOthFndsGrp/EOYAmt | 0 | 4847838 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 531679 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 373428 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 282585 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 546646 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 242432 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 277706 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 116735 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 1466104 |
| IRS990ScheduleA/GrossReceiptsRltdActivitiesAmt | 0 | 166239 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportPY170Pct | 0 | 1.00000 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 1466104 |
| IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind | 0 | X |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt | 0 | 282585 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt | 0 | 546646 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 242432 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 277706 |
| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 116735 |
| IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt | 0 | 1466104 |
| IRS990ScheduleA/TotalSupportAmt | 0 | 1466104 |
| IRS990/ScheduleBRequiredInd | 0 | 0 |
| IRS990ScheduleD/BuildingsGrp/BookValueAmt | 0 | 1655772 |
| IRS990ScheduleD/BuildingsGrp/DepreciationAmt | 0 | 120435 |
| IRS990ScheduleD/BuildingsGrp/OtherCostOrOtherBasisAmt | 0 | 1776207 |
| IRS990ScheduleD/LandGrp/BookValueAmt | 0 | 704950 |
| IRS990ScheduleD/LandGrp/OtherCostOrOtherBasisAmt | 0 | 704950 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 9675 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 1 | 45891 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | SECURITY DEPOSITS |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 1 | CAPITAL EXPENSE RESERVE |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 2360722 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 55566 |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event1Nm | 0 | FLOAT YOUR BOAT |
| IRS990ScheduleG/FundraisingEventInformationGrp/Event2Nm | 0 | HOLIDAY ARTS AND CRAFTS |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent1Amt | 0 | 3705 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsEvent2Amt | 0 | 4054 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsOtherEventsAmt | 0 | 21471 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossReceiptsTotalAmt | 0 | 29230 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent1Amt | 0 | 3705 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueEvent2Amt | 0 | 4054 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueOtherEventsAmt | 0 | 21471 |
| IRS990ScheduleG/FundraisingEventInformationGrp/GrossRevenueTotalEventsAmt | 0 | 29230 |
| IRS990ScheduleG/FundraisingEventInformationGrp/NetIncomeSummaryAmt | 0 | 29230 |
| IRS990ScheduleG/FundraisingEventInformationGrp/OtherEventsTotalCnt | 0 | 2 |
| IRS990/ScheduleJRequiredInd | 0 | 0 |
| IRS990/ScheduleORequiredInd | 0 | 1 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | PROVIDED TO BOARD FOR REVIEW |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | DOCUMENTS ARE AVAILABLE FOR INSPECTION IN THE BUSINESS OFFICE |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | RECORDS ARE AVAILABE FOR INSPECTION AT THE BUSINESS OFFICE |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | FORM 990, PART VI, SECTION B, LINE 11B |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | FORM 990, PART VI, SECTION C, LINE 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | PAGE 1 LINE |
| IRS990/SchoolOperatingInd | 0 | 0 |
| IRS990/SignificantChangeInd | 0 | 0 |
| IRS990/SignificantNewProgramSrvcInd | 0 | 0 |
| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | CA |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | 0 |
| IRS990/SubjectToProxyTaxInd | 0 | 0 |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | 0 |
| IRS990/TaxablePartyNotificationInd | 0 | 0 |
| IRS990/TaxExemptBondsInd | 0 | 0 |
| IRS990/TerminateOperationsInd | 0 | 0 |
| IRS990/TotalAssetsBOYAmt | 0 | 4627371 |
| IRS990/TotalAssetsEOYAmt | 0 | 4903404 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 4627371 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 4903404 |
| IRS990/TotalCompGreaterThan150KInd | 0 | 0 |
| IRS990/TotalContributionsAmt | 0 | 282585 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 273485 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 213124 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 486609 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 42406 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 55566 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 42406 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 55566 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 4584965 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 4847838 |
| IRS990/TotalOtherCompensationAmt | 0 | 0 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 213124 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 216125 |
| IRS990/TotalReportableCompFromOrgAmt | 0 | 91415 |
| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 29230 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 223771 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 535586 |
| IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt | 0 | 0 |
| IRS990/TotalVolunteersCnt | 0 | 0 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 4627371 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 4903404 |
| IRS990/TotReportableCompRltdOrgAmt | 0 | 0 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | 0 |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | 0 |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | PO BOX 134 |
| IRS990/USAddress/CityNm | 0 | TIBURON |
| IRS990/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/USAddress/ZIPCd | 0 | 94920 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 9 |
| IRS990/VotingMembersIndependentCnt | 0 | 9 |
| IRS990/WebsiteAddressTxt | 0 | WWW.LANDMARKS-SOCIETY.ORG |
| IRS990/WhistleblowerPolicyInd | 0 | 0 |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | 1 |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | PATTY FLAX |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | EXECUTIVE DIRECTOR |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 4154351853 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2025-04-04 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | BELVEDERE-TIBURON LANDMARKS SOCIETY |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | BELV |
| ReturnHeader/Filer/EIN | 0 | 946104011 |
| ReturnHeader/Filer/PhoneNum | 0 | 4154351853 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 1550 TIBURON BLVD M |
| ReturnHeader/Filer/USAddress/CityNm | 0 | TIBURON |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 94920 |
| ReturnHeader/IRSResponsiblePrtyInfoCurrInd | 0 | 0 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 872367419 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | WINSTON ACCOUNTANCY CORPORATION |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 999 5TH AVE SUITE 250 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | SAN RAFAEL |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 94901 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 4154591040 |
| ReturnHeader/PreparerPersonGrp/PreparationDt | 0 | 2025-04-04 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | GARY WINSTON CPA |
| ReturnHeader/PreparerPersonGrp/SelfEmployedInd | 0 | X |
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