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    <link:label id="lab_open_PaymentsToAcquireEquitySecuritiesFVNI_6908a34d-8e8d-48f6-9bb1-89cd10cd2463_negatedTerseLabel_en-US" xlink:label="lab_open_PaymentsToAcquireEquitySecuritiesFVNI" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Purchase of non-marketable equity securities</link:label>
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    <link:label id="lab_open_LineOfCreditFacilityFullyCommittedBorrowingCapacity_92fe0291-66db-4b14-ab5d-b606c2bb6649_terseLabel_en-US" xlink:label="lab_open_LineOfCreditFacilityFullyCommittedBorrowingCapacity" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Fully committed borrowing capacity</link:label>
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    <link:label id="lab_us-gaap_ComputerEquipmentMember_91f8d52f-12cb-40e8-a783-cdeba12b7a07_terseLabel_en-US" xlink:label="lab_us-gaap_ComputerEquipmentMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Computers</link:label>
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    <link:label id="lab_open_SaleOfStockNumberOfUnitsAuthorizedInTransaction_9bc4cc34-c1d7-4615-9bee-2ac45188865e_terseLabel_en-US" xlink:label="lab_open_SaleOfStockNumberOfUnitsAuthorizedInTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of units issued (in shares)</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentTerm_99bf0989-a9ff-415b-8673-a238598dcc2b_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Term</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Business Combinations [Abstract]</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_6f0993ea-ca59-4a7e-9024-046dda1e0925_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Increase (Decrease) in Stockholders' Equity [Roll Forward]</link:label>
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    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
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    <link:label id="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_2f6b5cdc-3ecc-4547-8d73-7d6de3487709_terseLabel_en-US" xlink:label="lab_us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Shares sold (in shares)</link:label>
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    <link:label id="lab_us-gaap_DebtDisclosureTextBlock_df61593f-8081-44dc-9761-797a11029778_terseLabel_en-US" xlink:label="lab_us-gaap_DebtDisclosureTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">CREDIT FACILITIES AND LONG-TERM DEBT</link:label>
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    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1_4ff920a6-b18d-4715-b234-dfb554520086_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Weighted-average remaining contractual term (in years), exercisable</link:label>
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    <link:label id="lab_open_ClassOfWarrantOrRightReferenceValue_4d67d684-1035-4508-8373-ef113c30d3af_terseLabel_en-US" xlink:label="lab_open_ClassOfWarrantOrRightReferenceValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Reference value (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfCommonStock_1ec5b42b-6c55-4f09-85a3-8fe1af80feca_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from the February 2021 Offering</link:label>
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    <link:label id="lab_us-gaap_CostOfRevenue_8da2af33-d7db-4dd8-8605-c325f01d4a51_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfRevenue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">COST OF REVENUE</link:label>
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    <link:label id="lab_us-gaap_CommonStockSharesAuthorized_a573d220-4789-4c45-8e3e-b0a972bd9ea6_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockSharesAuthorized" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Common stock authorized (in shares)</link:label>
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    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_a3faef41-1815-4ae7-9083-9508c53660b8_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskByTypeAxis_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskByTypeAxis" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Concentration Risk Type [Axis]</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis" xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_066c81a8-6627-4789-9931-fc6b3769c6a7_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Summary of the RSU Activity</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_23ebf744-bb6a-4a0e-a418-27d10a044085_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Property, plant and equipment</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromStockOptionsExercised_4461837e-ad1c-44d9-9e69-adebaee0d264_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromStockOptionsExercised" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Proceeds from exercise of stock options</link:label>
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    <link:label id="lab_open_UnvestedCommonStockPurchased_dfa0298d-54ca-4bbd-9cba-d0cc1aad0808_terseLabel_en-US" xlink:label="lab_open_UnvestedCommonStockPurchased" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Unvested common stock purchased (in shares)</link:label>
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    <link:label id="lab_open_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedGrantDateFairValue_5ca3b848-7969-43ab-8a58-0566f175d51b_terseLabel_en-US" xlink:label="lab_open_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonvestedGrantDateFairValue" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Grant date fair value for awards</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementAbstract_label_en-US" xlink:label="lab_us-gaap_IncomeStatementAbstract" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Income Statement [Abstract]</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionRate_a416e102-1402-4229-b72a-bb7b5afa8547_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionRate" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Interest rate (in percent)</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionRate_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionRate" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Related Party Transaction, Rate</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_fb3ddf54-a3ab-44a7-9ea5-b7641dad5e4b_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Requisite service period</link:label>
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    <link:label id="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_15b6ba82-1605-4583-933b-3503e1f9cee1_terseLabel_en-US" xlink:label="lab_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Investments Classified by Contractual Maturity Date</link:label>
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    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_e102ffad-a7f4-45ee-8bd2-361adeb7677c_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">LEASE LIABILITIES&#8201;&#8211;&#8201;Net of current portion</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract_ff09575b-55d8-4d94-b1af-f2e5fc4694dd_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesFairValueDisclosureAbstract" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Liabilities, Fair Value Disclosure [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AssetsFairValueDisclosure_916f11dc-e808-4542-bdd5-b186c4085ac6_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsFairValueDisclosure" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total assets</link:label>
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    <link:label id="lab_open_NumberOfHomeTransactionsCompleted_8bbcac82-b339-426b-9e4c-7ff943889126_terseLabel_en-US" xlink:label="lab_open_NumberOfHomeTransactionsCompleted" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of home transactions completed</link:label>
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    <link:label id="lab_open_NumberOfHomeTransactionsCompleted_documentation_en-US" xlink:label="lab_open_NumberOfHomeTransactionsCompleted" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Number of Home Transactions Completed</link:label>
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    <link:label id="lab_open_ClassOfWarrantsAndRightsRedemptionPricePerShare_714cd120-6cea-43d0-89a7-31d4408122ff_terseLabel_en-US" xlink:label="lab_open_ClassOfWarrantsAndRightsRedemptionPricePerShare" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Exercise price of warrants (in dollars per share)</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_f86523f4-f065-44b0-bb7d-a0bfe2b3c127_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Total principal outstanding</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentCarryingAmount_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentCarryingAmount" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Long-term Debt, Gross</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock_e4a387b3-53ba-4872-b63d-17f3fb5b7e30_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfDebtInstrumentsTextBlock" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Schedule of Long-term Debt Instruments</link:label>
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    <link:label id="lab_dei_EntityAddressAddressLine1_b147b263-9199-4ffa-9d1f-8d5fdd37adcb_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line One</link:label>
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    <link:label id="lab_us-gaap_NoncompeteAgreementsMember_921e5948-65d6-428c-bc39-cf0e80d0554f_terseLabel_en-US" xlink:label="lab_us-gaap_NoncompeteAgreementsMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Non-competition agreements</link:label>
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    <link:label id="lab_dei_EntityAddressAddressLine2_bdfc7da4-5f79-4afa-be0b-a530dec00f1c_terseLabel_en-US" xlink:label="lab_dei_EntityAddressAddressLine2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Entity Address, Address Line Two</link:label>
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    <link:label id="lab_open_SeriesBConvertiblePreferredStockMember_abde4f0a-b787-4eab-b601-5acc7c0c00a1_terseLabel_en-US" xlink:label="lab_open_SeriesBConvertiblePreferredStockMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xmlns:xml="http://www.w3.org/XML/1998/namespace" xml:lang="en-US">Series&#160;B Convertible Preferred Stock</link:label>
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