<SEC-DOCUMENT>0000803649-20-000049-index.html : 20200403
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<ACCEPTANCE-DATETIME>20200403161301
ACCESSION NUMBER:		0000803649-20-000049
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		15
CONFORMED PERIOD OF REPORT:	20200402
ITEM INFORMATION:		Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20200403
DATE AS OF CHANGE:		20200403

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Equity Commonwealth
		CENTRAL INDEX KEY:			0000803649
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				046558834
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09317
		FILM NUMBER:		20773477

	BUSINESS ADDRESS:	
		STREET 1:		TWO NORTH RIVERSIDE PLAZA
		STREET 2:		SUITE 2100
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		312.646.2800

	MAIL ADDRESS:	
		STREET 1:		TWO NORTH RIVERSIDE PLAZA
		STREET 2:		SUITE 2100
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CommonWealth REIT
		DATE OF NAME CHANGE:	20100702

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HRPT PROPERTIES TRUST
		DATE OF NAME CHANGE:	19980701

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	HEALTH & RETIREMENT PROPERTIES TRUST
		DATE OF NAME CHANGE:	19940811
</SEC-HEADER>
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<TYPE>8-K
<SEQUENCE>1
<FILENAME>eqc-20200402.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: eqc-20200402.htm

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<DOCUMENT>
<TYPE>EX-3.1
<SEQUENCE>2
<FILENAME>a202004eqcfourthamende.htm
<DESCRIPTION>EX-3.1
<TEXT>
Document 2 - file: a202004eqcfourthamende.htm

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<TYPE>EX-101.SCH
<SEQUENCE>3
<FILENAME>eqc-20200402.xsd
<DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
<TEXT>
Document 3 - file: eqc-20200402.xsd

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<FILENAME>eqc-20200402_cal.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT
<TEXT>
Document 4 - file: eqc-20200402_cal.xml

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<TYPE>EX-101.DEF
<SEQUENCE>5
<FILENAME>eqc-20200402_def.xml
<DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT
<TEXT>
Document 5 - file: eqc-20200402_def.xml

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<TYPE>EX-101.LAB
<SEQUENCE>6
<FILENAME>eqc-20200402_lab.xml
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<TEXT>
Document 6 - file: eqc-20200402_lab.xml

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<TYPE>EX-101.PRE
<SEQUENCE>7
<FILENAME>eqc-20200402_pre.xml
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<TEXT>
Document 7 - file: eqc-20200402_pre.xml

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<FILENAME>0000803649-20-000049-xbrl.zip
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<TEXT>
Document 8 - file: 0000803649-20-000049-xbrl.zip

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<TYPE>EXCEL
<SEQUENCE>9
<FILENAME>Financial_Report.xlsx
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 9 - file: Financial_Report.xlsx

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<TEXT>
Document 10 - file: report.css

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<TYPE>XML
<SEQUENCE>12
<FILENAME>Show.js
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<TEXT>
Document 12 - file: Show.js

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<TYPE>XML
<SEQUENCE>14
<FILENAME>R1.htm
<DESCRIPTION>IDEA: XBRL DOCUMENT
<TEXT>
Document 14 - file: R1.htm

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>15
<FILENAME>FilingSummary.xml
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<TEXT>
Document 15 - file: FilingSummary.html

Document 15 - RAW XML: FilingSummary.xml

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<DOCUMENT>
<TYPE>XML
<SEQUENCE>16
<FILENAME>eqc-20200402_htm.xml
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<TEXT>
Document 16 - file: eqc-20200402_htm.html

Document 16 - RAW XML: eqc-20200402_htm.xml

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<TYPE>JSON
<SEQUENCE>17
<FILENAME>MetaLinks.json
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<TEXT>
Document 17 - file: MetaLinks.json

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