<SEC-DOCUMENT>0001638599-17-001103.txt : 20171113
<SEC-HEADER>0001638599-17-001103.hdr.sgml : 20171110
<ACCEPTANCE-DATETIME>20171113163207
ACCESSION NUMBER:		0001638599-17-001103
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20170920
FILED AS OF DATE:		20171113
DATE AS OF CHANGE:		20171113

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			QUAZZO STEPHEN R
		CENTRAL INDEX KEY:			0001105602

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-54691
		FILM NUMBER:		171196391

	MAIL ADDRESS:	
		STREET 1:		C/O STARWOOD HOTELS & RESORTS WORLDWIDE
		STREET 2:		44 SOUTH BROADWAY
		CITY:			WHITE PLAINS
		STATE:			NY
		ZIP:			10601

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PHILLIPS EDISON GROCERY CENTER REIT I, INC.
		CENTRAL INDEX KEY:			0001476204
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				271106076
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		11501 NORTHLAKE DRIVE
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45249
		BUSINESS PHONE:		513-554-1110

	MAIL ADDRESS:	
		STREET 1:		11501 NORTHLAKE DRIVE
		CITY:			CINCINNATI
		STATE:			OH
		ZIP:			45249

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Phillips Edison Grocery Center REIT I, Inc.
		DATE OF NAME CHANGE:	20141205

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Phillips Edison - ARC Shopping Center REIT Inc.
		DATE OF NAME CHANGE:	20091105
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4_5068.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2017-09-20</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001476204</issuerCik>
        <issuerName>PHILLIPS EDISON GROCERY CENTER REIT I, INC.</issuerName>
        <issuerTradingSymbol>N/A</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001105602</rptOwnerCik>
            <rptOwnerName>QUAZZO STEPHEN R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>11501 NORTHLAKE DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CINCINNATI</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>45249</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2017-09-20</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>2451</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4902</value>
                    <footnoteId id="F2"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>64842.677</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Stephen R. Quazzo Trust</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The shares reported relate to restricted stock awarded to the reporting person and are subject to specified vesting provisions.</footnote>
        <footnote id="F2">Includes 4,289 shares of restricted stock awarded to the reporting person that are subject to specified vesting and settlement provisions.</footnote>
        <footnote id="F3">These shares are being held in a trust for the benefit of the reporting person. The reporting person is also the trustee of such trust.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jeffrey S. Edison</signatureName>
        <signatureDate>2017-11-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
