3.25.3 html 355 400 1 false 108 0 false 10 false false R1.htm 0000001 - Document - Cover Sheet http://sachemcapital.com/role/Cover Cover Cover 1 false false R2.htm 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS Sheet http://sachemcapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS CONDENSED CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://sachemcapital.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) Sheet http://sachemcapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSunaudited CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) Statements 4 false false R5.htm 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) Sheet http://sachemcapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMELOSSunaudited CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (unaudited) Statements 5 false false R6.htm 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) Sheet http://sachemcapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCHANGESINSHAREHOLDERSEQUITYunaudited CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (unaudited) Statements 6 false false R7.htm 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) Sheet http://sachemcapital.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSunaudited CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) Statements 7 false false R8.htm 9952157 - Disclosure - The Company Sheet http://sachemcapital.com/role/TheCompany The Company Notes 8 false false R9.htm 9952158 - Disclosure - Significant Accounting Policies Sheet http://sachemcapital.com/role/SignificantAccountingPolicies Significant Accounting Policies Notes 9 false false R10.htm 9952159 - Disclosure - Fair Value Measurement Sheet http://sachemcapital.com/role/FairValueMeasurement Fair Value Measurement Notes 10 false false R11.htm 9952160 - Disclosure - Loans and Allowance for Credit Losses Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLosses Loans and Allowance for Credit Losses Notes 11 false false R12.htm 9952161 - Disclosure - Investment in Developmental Real Estate, net Sheet http://sachemcapital.com/role/InvestmentinDevelopmentalRealEstatenet Investment in Developmental Real Estate, net Notes 12 false false R13.htm 9952162 - Disclosure - Real Estate Owned ("REO") Sheet http://sachemcapital.com/role/RealEstateOwnedREO Real Estate Owned ("REO") Notes 13 false false R14.htm 9952163 - Disclosure - Property and Equipment, net Sheet http://sachemcapital.com/role/PropertyandEquipmentnet Property and Equipment, net Notes 14 false false R15.htm 9952164 - Disclosure - Other Assets Sheet http://sachemcapital.com/role/OtherAssets Other Assets Notes 15 false false R16.htm 9952165 - Disclosure - Lines of Credit, Mortgage Payable and Churchill Facility Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacility Lines of Credit, Mortgage Payable and Churchill Facility Notes 16 false false R17.htm 9952166 - Disclosure - Unsecured Notes Payable Notes http://sachemcapital.com/role/UnsecuredNotesPayable Unsecured Notes Payable Notes 17 false false R18.htm 9952167 - Disclosure - Senior Secured Notes Payable Notes http://sachemcapital.com/role/SeniorSecuredNotesPayable Senior Secured Notes Payable Notes 18 false false R19.htm 9952168 - Disclosure - Accounts Payable and Accrued Liabilities Sheet http://sachemcapital.com/role/AccountsPayableandAccruedLiabilities Accounts Payable and Accrued Liabilities Notes 19 false false R20.htm 9952169 - Disclosure - Fee Income from Loans Sheet http://sachemcapital.com/role/FeeIncomefromLoans Fee Income from Loans Notes 20 false false R21.htm 9952170 - Disclosure - Commitments and Contingencies Sheet http://sachemcapital.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 21 false false R22.htm 9952171 - Disclosure - Related Party Transactions Sheet http://sachemcapital.com/role/RelatedPartyTransactions Related Party Transactions Notes 22 false false R23.htm 9952172 - Disclosure - Stock-Based Compensation and Employee Benefits Sheet http://sachemcapital.com/role/StockBasedCompensationandEmployeeBenefits Stock-Based Compensation and Employee Benefits Notes 23 false false R24.htm 9952173 - Disclosure - Equity Sheet http://sachemcapital.com/role/Equity Equity Notes 24 false false R25.htm 9952174 - Disclosure - Earnings (Losses) Per Share Sheet http://sachemcapital.com/role/EarningsLossesPerShare Earnings (Losses) Per Share Notes 25 false false R26.htm 9952175 - Disclosure - Limited Liability Company ("LLC") Investments Sheet http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestments Limited Liability Company ("LLC") Investments Notes 26 false false R27.htm 9952176 - Disclosure - Income Taxes Sheet http://sachemcapital.com/role/IncomeTaxes Income Taxes Notes 27 false false R28.htm 9952177 - Disclosure - Subsequent Events Sheet http://sachemcapital.com/role/SubsequentEvents Subsequent Events Notes 28 false false R29.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 29 false false R30.htm 9955511 - Disclosure - Significant Accounting Policies (Policies) Sheet http://sachemcapital.com/role/SignificantAccountingPoliciesPolicies Significant Accounting Policies (Policies) Policies http://sachemcapital.com/role/SignificantAccountingPolicies 30 false false R31.htm 9955512 - Disclosure - Fair Value Measurement (Tables) Sheet http://sachemcapital.com/role/FairValueMeasurementTables Fair Value Measurement (Tables) Tables http://sachemcapital.com/role/FairValueMeasurement 31 false false R32.htm 9955513 - Disclosure - Loans and Allowance for Credit Losses (Tables) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesTables Loans and Allowance for Credit Losses (Tables) Tables http://sachemcapital.com/role/LoansandAllowanceforCreditLosses 32 false false R33.htm 9955514 - Disclosure - Investment in Developmental Real Estate, net (Tables) Sheet http://sachemcapital.com/role/InvestmentinDevelopmentalRealEstatenetTables Investment in Developmental Real Estate, net (Tables) Tables http://sachemcapital.com/role/InvestmentinDevelopmentalRealEstatenet 33 false false R34.htm 9955515 - Disclosure - Real Estate Owned ("REO") (Tables) Sheet http://sachemcapital.com/role/RealEstateOwnedREOTables Real Estate Owned ("REO") (Tables) Tables http://sachemcapital.com/role/RealEstateOwnedREO 34 false false R35.htm 9955516 - Disclosure - Property and Equipment, net (Tables) Sheet http://sachemcapital.com/role/PropertyandEquipmentnetTables Property and Equipment, net (Tables) Tables http://sachemcapital.com/role/PropertyandEquipmentnet 35 false false R36.htm 9955517 - Disclosure - Other Assets (Tables) Sheet http://sachemcapital.com/role/OtherAssetsTables Other Assets (Tables) Tables http://sachemcapital.com/role/OtherAssets 36 false false R37.htm 9955518 - Disclosure - Lines of Credit, Mortgage Payable, and Churchill Facility (Tables) Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacilityTables Lines of Credit, Mortgage Payable, and Churchill Facility (Tables) Tables 37 false false R38.htm 9955519 - Disclosure - Unsecured Notes Payable (Tables) Notes http://sachemcapital.com/role/UnsecuredNotesPayableTables Unsecured Notes Payable (Tables) Tables http://sachemcapital.com/role/UnsecuredNotesPayable 38 false false R39.htm 9955520 - Disclosure - Accounts Payable and Accrued Liabilities (Tables) Sheet http://sachemcapital.com/role/AccountsPayableandAccruedLiabilitiesTables Accounts Payable and Accrued Liabilities (Tables) Tables http://sachemcapital.com/role/AccountsPayableandAccruedLiabilities 39 false false R40.htm 9955521 - Disclosure - Fee Income from Loans (Tables) Sheet http://sachemcapital.com/role/FeeIncomefromLoansTables Fee Income from Loans (Tables) Tables http://sachemcapital.com/role/FeeIncomefromLoans 40 false false R41.htm 9955522 - Disclosure - Limited Liability Company ("LLC") Investments (Tables) Sheet http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestmentsTables Limited Liability Company ("LLC") Investments (Tables) Tables http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestments 41 false false R42.htm 9955523 - Disclosure - The Company (Details) Sheet http://sachemcapital.com/role/TheCompanyDetails The Company (Details) Details http://sachemcapital.com/role/TheCompany 42 false false R43.htm 9955524 - Disclosure - Significant Accounting Policies - Variable Interest Entity (Details) Sheet http://sachemcapital.com/role/SignificantAccountingPoliciesVariableInterestEntityDetails Significant Accounting Policies - Variable Interest Entity (Details) Details 43 false false R44.htm 9955525 - Disclosure - Fair Value Measurement - Measured on a recurring basis (Details) Sheet http://sachemcapital.com/role/FairValueMeasurementMeasuredonarecurringbasisDetails Fair Value Measurement - Measured on a recurring basis (Details) Details 44 false false R45.htm 9955526 - Disclosure - Fair Value Measurement - Measured on a nonrecurring basis (Details) Sheet http://sachemcapital.com/role/FairValueMeasurementMeasuredonanonrecurringbasisDetails Fair Value Measurement - Measured on a nonrecurring basis (Details) Details 45 false false R46.htm 9955527 - Disclosure - Fair Value Measurement - Carrying amounts and fair value (Details) Sheet http://sachemcapital.com/role/FairValueMeasurementCarryingamountsandfairvalueDetails Fair Value Measurement - Carrying amounts and fair value (Details) Details 46 false false R47.htm 9955528 - Disclosure - Fair Value Measurement - Company's available-for-sale (AFS) securities and other comprehensive income (OCI) (Details) Sheet http://sachemcapital.com/role/FairValueMeasurementCompanysavailableforsaleAFSsecuritiesandothercomprehensiveincomeOCIDetails Fair Value Measurement - Company's available-for-sale (AFS) securities and other comprehensive income (OCI) (Details) Details 47 false false R48.htm 9955529 - Disclosure - Loans and Allowance for Credit Losses - Additional Information (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesAdditionalInformationDetails Loans and Allowance for Credit Losses - Additional Information (Details) Details 48 false false R49.htm 9955530 - Disclosure - Loans and Allowance for Credit Losses - Schedule of loans held for sale (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesScheduleofloansheldforsaleDetails Loans and Allowance for Credit Losses - Schedule of loans held for sale (Details) Details 49 false false R50.htm 9955531 - Disclosure - Loans and Allowance for Credit Losses - Company's loan portfolio by the past due (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesCompanysloanportfoliobythepastdueDetails Loans and Allowance for Credit Losses - Company's loan portfolio by the past due (Details) Details 50 false false R51.htm 9955532 - Disclosure - Loans and Allowance for Credit Losses - CECL Allowance by CECL Allowances by loan portfolio geographical location (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesCECLAllowancebyCECLAllowancesbyloanportfoliogeographicallocationDetails Loans and Allowance for Credit Losses - CECL Allowance by CECL Allowances by loan portfolio geographical location (Details) Details 51 false false R52.htm 9955533 - Disclosure - Loans and Allowance for Credit Losses - Internal credit quality indicators (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesInternalcreditqualityindicatorsDetails Loans and Allowance for Credit Losses - Internal credit quality indicators (Details) Details 52 false false R53.htm 9955534 - Disclosure - Loans and Allowance for Credit Losses - Loan modifications made to borrowers experiencing financial difficulty (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesLoanmodificationsmadetoborrowersexperiencingfinancialdifficultyDetails Loans and Allowance for Credit Losses - Loan modifications made to borrowers experiencing financial difficulty (Details) Details 53 false false R54.htm 9955535 - Disclosure - Loans and Allowance for Credit Losses - Performance of loans that have been modified in the last 12 months to borrowers experiencing financial difficulty (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesPerformanceofloansthathavebeenmodifiedinthelast12monthstoborrowersexperiencingfinancialdifficultyDetails Loans and Allowance for Credit Losses - Performance of loans that have been modified in the last 12 months to borrowers experiencing financial difficulty (Details) Details 54 false false R55.htm 9955536 - Disclosure - Loans and Allowance for Credit Losses - CECL allowance (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesCECLallowanceDetails Loans and Allowance for Credit Losses - CECL allowance (Details) Details 55 false false R56.htm 9955537 - Disclosure - Loans and Allowance for Credit Losses - CECL Allowance by Geographical Location (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesCECLAllowancebyGeographicalLocationDetails Loans and Allowance for Credit Losses - CECL Allowance by Geographical Location (Details) Details 56 false false R57.htm 9955538 - Disclosure - Loans and Allowance for Credit Losses - CECL Allowance by charge-offs (Details) Sheet http://sachemcapital.com/role/LoansandAllowanceforCreditLossesCECLAllowancebychargeoffsDetails Loans and Allowance for Credit Losses - CECL Allowance by charge-offs (Details) Details 57 false false R58.htm 9955539 - Disclosure - Investment in Developmental Real Estate, net - Schedule of investment in rental real estate (Details) Sheet http://sachemcapital.com/role/InvestmentinDevelopmentalRealEstatenetScheduleofinvestmentinrentalrealestateDetails Investment in Developmental Real Estate, net - Schedule of investment in rental real estate (Details) Details 58 false false R59.htm 9955540 - Disclosure - Investment in Developmental Real Estate, net - Narrative (Details) Sheet http://sachemcapital.com/role/InvestmentinDevelopmentalRealEstatenetNarrativeDetails Investment in Developmental Real Estate, net - Narrative (Details) Details 59 false false R60.htm 9955541 - Disclosure - Investment in Developmental Real Estate, net - Future minimum rents under non-cancelable operating leases (Details) Sheet http://sachemcapital.com/role/InvestmentinDevelopmentalRealEstatenetFutureminimumrentsundernoncancelableoperatingleasesDetails Investment in Developmental Real Estate, net - Future minimum rents under non-cancelable operating leases (Details) Details 60 false false R61.htm 9955542 - Disclosure - Real Estate Owned ("REO") (Details) Sheet http://sachemcapital.com/role/RealEstateOwnedREODetails Real Estate Owned ("REO") (Details) Details http://sachemcapital.com/role/RealEstateOwnedREOTables 61 false false R62.htm 9955543 - Disclosure - Real Estate Owned ("REO") - Activity of the Company's real estate owned (Details) Sheet http://sachemcapital.com/role/RealEstateOwnedREOActivityoftheCompanysrealestateownedDetails Real Estate Owned ("REO") - Activity of the Company's real estate owned (Details) Details http://sachemcapital.com/role/RealEstateOwnedREOTables 62 false false R63.htm 9955544 - Disclosure - Real Estate Owned ("REO") - Rental payments due from real estate (Details) Sheet http://sachemcapital.com/role/RealEstateOwnedREORentalpaymentsduefromrealestateDetails Real Estate Owned ("REO") - Rental payments due from real estate (Details) Details http://sachemcapital.com/role/RealEstateOwnedREOTables 63 false false R64.htm 9955545 - Disclosure - Property and Equipment, net (Details) Sheet http://sachemcapital.com/role/PropertyandEquipmentnetDetails Property and Equipment, net (Details) Details http://sachemcapital.com/role/PropertyandEquipmentnetTables 64 false false R65.htm 9955546 - Disclosure - Other Assets (Details) Sheet http://sachemcapital.com/role/OtherAssetsDetails Other Assets (Details) Details http://sachemcapital.com/role/OtherAssetsTables 65 false false R66.htm 9955547 - Disclosure - Lines of Credit, Mortgage Payable and Churchill Facility - Line of credit - Needham Bank (Details) Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacilityLineofcreditNeedhamBankDetails Lines of Credit, Mortgage Payable and Churchill Facility - Line of credit - Needham Bank (Details) Details 66 false false R67.htm 9955548 - Disclosure - Lines of Credit, Mortgage Payable and Churchill Facility - Mortgage payable - New Haven Bank (Details) Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacilityMortgagepayableNewHavenBankDetails Lines of Credit, Mortgage Payable and Churchill Facility - Mortgage payable - New Haven Bank (Details) Details 67 false false R68.htm 9955549 - Disclosure - Lines of Credit, Mortgage Payable and Churchill Facility - Churchill repurchase financing facility (Details) Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacilityChurchillrepurchasefinancingfacilityDetails Lines of Credit, Mortgage Payable and Churchill Facility - Churchill repurchase financing facility (Details) Details 68 false false R69.htm 9955550 - Disclosure - Lines of Credit, Mortgage Payable and Churchill Facility - Schedule of proceeds received and loans held for investment pledged as collateral under the Churchill Facility agreement (Details) Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacilityScheduleofproceedsreceivedandloansheldforinvestmentpledgedascollateralundertheChurchillFacilityagreementDetails Lines of Credit, Mortgage Payable and Churchill Facility - Schedule of proceeds received and loans held for investment pledged as collateral under the Churchill Facility agreement (Details) Details 69 false false R70.htm 9955551 - Disclosure - Lines of Credit, Mortgage Payable and Churchill Facility - Loans held for investment sold under the repurchase agreement (Details) Sheet http://sachemcapital.com/role/LinesofCreditMortgagePayableandChurchillFacilityLoansheldforinvestmentsoldundertherepurchaseagreementDetails Lines of Credit, Mortgage Payable and Churchill Facility - Loans held for investment sold under the repurchase agreement (Details) Details 70 false false R71.htm 9955552 - Disclosure - Unsecured Notes Payable - Narrative (Details) Notes http://sachemcapital.com/role/UnsecuredNotesPayableNarrativeDetails Unsecured Notes Payable - Narrative (Details) Details 71 false false R72.htm 9955553 - Disclosure - Unsecured Notes Payable - Future principal payments (Details) Notes http://sachemcapital.com/role/UnsecuredNotesPayableFutureprincipalpaymentsDetails Unsecured Notes Payable - Future principal payments (Details) Details 72 false false R73.htm 9955554 - Disclosure - Unsecured Notes Payable - Estimated amortization of the deferred financing costs (Details) Notes http://sachemcapital.com/role/UnsecuredNotesPayableEstimatedamortizationofthedeferredfinancingcostsDetails Unsecured Notes Payable - Estimated amortization of the deferred financing costs (Details) Details 73 false false R74.htm 9955555 - Disclosure - Senior Secured Notes Payable (Details) Notes http://sachemcapital.com/role/SeniorSecuredNotesPayableDetails Senior Secured Notes Payable (Details) Details http://sachemcapital.com/role/SeniorSecuredNotesPayable 74 false false R75.htm 9955556 - Disclosure - Accounts Payable and Accrued Liabilities (Details) Sheet http://sachemcapital.com/role/AccountsPayableandAccruedLiabilitiesDetails Accounts Payable and Accrued Liabilities (Details) Details http://sachemcapital.com/role/AccountsPayableandAccruedLiabilitiesTables 75 false false R76.htm 9955557 - Disclosure - Fee Income from Loans (Details) Sheet http://sachemcapital.com/role/FeeIncomefromLoansDetails Fee Income from Loans (Details) Details http://sachemcapital.com/role/FeeIncomefromLoansTables 76 false false R77.htm 9955558 - Disclosure - Commitments and Contingencies (Details) Sheet http://sachemcapital.com/role/CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://sachemcapital.com/role/CommitmentsandContingencies 77 false false R78.htm 9955559 - Disclosure - Related Party Transactions (Details) Sheet http://sachemcapital.com/role/RelatedPartyTransactionsDetails Related Party Transactions (Details) Details http://sachemcapital.com/role/RelatedPartyTransactions 78 false false R79.htm 9955560 - Disclosure - Stock-Based Compensation and Employee Benefits (Details) Sheet http://sachemcapital.com/role/StockBasedCompensationandEmployeeBenefitsDetails Stock-Based Compensation and Employee Benefits (Details) Details http://sachemcapital.com/role/StockBasedCompensationandEmployeeBenefits 79 false false R80.htm 9955561 - Disclosure - Equity (Details) Sheet http://sachemcapital.com/role/EquityDetails Equity (Details) Details http://sachemcapital.com/role/Equity 80 false false R81.htm 9955562 - Disclosure - Earnings (Losses) Per Share (Details) Sheet http://sachemcapital.com/role/EarningsLossesPerShareDetails Earnings (Losses) Per Share (Details) Details http://sachemcapital.com/role/EarningsLossesPerShare 81 false false R82.htm 9955563 - Disclosure - Limited Liability Company ("LLC") Investments - Carrying value (Details) Sheet http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestmentsCarryingvalueDetails Limited Liability Company ("LLC") Investments - Carrying value (Details) Details http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestmentsTables 82 false false R83.htm 9955564 - Disclosure - Limited Liability Company ("LLC") Investments - Narrative (Details) Sheet http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestmentsNarrativeDetails Limited Liability Company ("LLC") Investments - Narrative (Details) Details http://sachemcapital.com/role/LimitedLiabilityCompanyLLCInvestmentsTables 83 false false R84.htm 9955565 - Disclosure - Income Taxes (Details) Sheet http://sachemcapital.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://sachemcapital.com/role/IncomeTaxes 84 false false All Reports Book All Reports sach-20250930.htm sach-20250930.xsd sach-20250930_cal.xml sach-20250930_def.xml sach-20250930_lab.xml sach-20250930_pre.xml http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true