SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 12b-25

                           NOTIFICATION OF LATE FILING

                          Commission File No. 000-31553

                 Form 10-KSB for Period Ended: December 31, 2002

PART - I - Registrant Information

                            HOUSTON OPERATING COMPANY
                       ----------------------------------
             (Exact name of registrant as specified in its charter)


            Delaware                                     76-0307819
- - - --------------------------------                        -------------------
     (State of incorporation)                           (I.R.S. Employer
                                                        Identification No.)

                11145 Rockland Dr., Littleton,           80127
            ---------------------------------------------------------
               (Address of principal executive offices) (Zip Code)

Registrant's telephone number, including area code:  (720) 981-0523

PART II - Rules 12-b25 (b) and (c)

         If the subject report could not be filed without unreasonable effort or
expense,  and the  registrant  seeks  relief  pursuant  to Rule  12b-25(b),  the
following should be completed.
(Check box if appropriate)

         (a) The reasons described in reasonable detail in Part III of this form
could not be eliminated without unreasonable effort or expense;

         (b) The subject annual report, semi-annual report, transition report on
form 10-K,  Form 20-F,  11-K, or Form N-SAR, or portion thereof will be filed on
or before the fifteenth  calendar day following the  prescribed due date, or the
subject  quarterly report or transition  report on Form 10-Q, or portion thereof
will be filed on or before the fifth  calendar day following the  prescribed due
date;

         (c) The  accountant's  statement  or  other  exhibit  required  by Rule
12b-25(c) has been attached if applicable.

Part III - Narrative

         State below, in reasonable  detail,  the reasons why Form 10-K and form
10-KSB,  20-F,  1-K, 10-Q, and Form N-SAR,  or the transition  report or portion
thereof could not be filed within the prescribed period.

The fiscal year end December 31, 2002 annual audit of  Houston Operating Company
is not yet  completed and cannot be completed by the required  filing date
without unreasonable cost and effort.


Part IV - Other Information (1) Name and telephone number of person to contact in regard to this notification: /s/ J.R. Nelson, President (720) 981-0523 (2) Have all other periodic reports required under section 13 or 15(d) of the Securities Exchange Act of 1934 or section 30 of the Investment Company act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If the answer is no, identify report(s). Yes (3) It is anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be effected by the earnings statements to be included in the subject report or portion thereof? No Houston Operating Company has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized. Dated: March 25, 2003 Houston Operating Company /s/ J.R. Nelson, President ------------------------------------- J.R. Nelson, President