    <SEC-DOCUMENT>0001488139-23-000066-index.html : 20230428
    <SEC-HEADER>0001488139-23-000066.hdr.sgml : 20230428
    <ACCEPTANCE-DATETIME>20230428072647
    ACCESSION NUMBER:		0001488139-23-000066
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20230428
    DATE AS OF CHANGE:		20230428

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Ameresco, Inc.
    		CENTRAL INDEX KEY:			0001488139
    		STANDARD INDUSTRIAL CLASSIFICATION:	CONSTRUCTION SPECIAL TRADE CONTRACTORS [1700]
    		IRS NUMBER:				043512838
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-34811
    		FILM NUMBER:		23860163

    	BUSINESS ADDRESS:
    		STREET 1:		111 SPEEN STREET
    		CITY:			FRAMINGHAM
    		STATE:			MA
    		ZIP:			01701
    		BUSINESS PHONE:		508-661-2200

    	MAIL ADDRESS:
    		STREET 1:		111 SPEEN STREET
    		CITY:			FRAMINGHAM
    		STATE:			MA
    		ZIP:			01701
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>defa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: defa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>proxynoticefordefa_pagex1a.jpg
    <TEXT>
    Document 2 - file: proxynoticefordefa_pagex1a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>proxynoticefordefa_pagex2a.jpg
    <TEXT>
    Document 3 - file: proxynoticefordefa_pagex2a.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>