<PAGE>


                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

     Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

         Date of Report (Date of earliest event reported): March 3, 2003

                         ENCOMPASS SERVICES CORPORATION
             (Exact name of registrant as specified in its charter)

            Texas                       1-13565                 76-0535259
(State or other jurisdiction          (Commission            (I.R.S. Employer
      of incorporation)               File Number)          Identification No.)

        3 Greenway Plaza, Suite 2000
               Houston, Texas                                     77046
  (Address of principal executive offices)                      (Zip Code)

       Registrant's telephone number, including area code: (713) 860-0100

<PAGE>

                    INFORMATION TO BE INCLUDED IN THE REPORT

Item 5. Other Events.

     On March 3, 2003, the registrant filed with the United States Bankruptcy
Court for the Southern District of Texas (the "Bankruptcy Court") its monthly
operating report for January 2003. The monthly operating report is attached as
Exhibit 99.1 to this Current Report on Form 8-K.

     The registrant cautions readers not to place undue reliance upon the
information contained in the operating report. The operating report contains
unaudited information, is limited in scope, covers a limited time period and is
in a format prescribed by the applicable bankruptcy laws. There can be no
assurance that the operating report is complete. The registrant also cautions
readers to read the cautionary statement contained as part of the operating
report. Since the information contained in the operating report is in a form
prescribed by the applicable bankruptcy laws, the information is not prepared
and presented in accordance with generally accepted accounting principles, and
would not necessarily be indicative of the registrant's financial condition or
results of operations that would be reflected in consolidated financial
statements prepared by the registrant.

     As stated in the Form 8-K dated January 31, 2003 and in other documents
filed by the registrant with the SEC, the registrant expects to file a plan of
reorganization with the Bankruptcy Court during the first quarter of 2003 and
believes that any plan confirmed by the Bankruptcy Court will result in the
cancellation of all of the debt and equity securities of the registrant for no
value.

Item 7. Financial Statements and Exhibits.

     (c) Exhibits.

Exhibit No.             Exhibit
-----------             -------
    99.1        Monthly Operating Report for January 2003.


                                       2

<PAGE>

                                    SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                        ENCOMPASS SERVICES CORPORATION


Date:  March 4, 2003                 By:    /s/ Gray H. Muzzy
                                            -----------------------------------
                                            Gray H. Muzzy
                                            Senior Vice President,
                                            General Counsel and Secretary


                                       3

<PAGE>

                                  EXHIBIT INDEX

Exhibit

99.1     Monthly Operating Report for January 2003.



                                       4