Washington, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

                    Under the Securities Exchange Act of 1934

                              StorageNetworks, Inc.
                                (Name of Issuer)

                                  Common Stock
                         (Title of Class of Securities)

                                 (CUSIP Number)

                                 August 18, 2003
             (Date of Event Which Requires Filing of this Statement)

      (1) The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

      The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).

                                Page 1 of 5 Pages

CUSIP No. 86211E103                    13G                     Page 2 of 5 Pages
1     Name of Reporting Person
      S.S. or I.R.S. Identification No. of Above Person

      TowerView LLC.    Employer I.D. # 13-4159490
2     Check the Appropriate Box If a Member of a Group
                                     a. |_|
                                     b. |X|
3     SEC Use Only

4     Citizenship or Place of Organization

      State of Delaware
                  5     Sole Voting Power
  Number of
   Shares               5,741,900
Beneficially            --------------------------------------------------------
  Owned By        6     Shared Voting Power
  Reporting             0
   Person               --------------------------------------------------------
    With          7     Sole Dispositive Power

                  8     Shared Dispositive Power


9     Aggregate Amount Beneficially Owned by Each Reporting Person

10    Check Box If the Aggregate Amount in Row (9) Excludes Certain Shares  |_|

11    Percent of Class Represented By Amount in Row (9)

12    Type of Reporting Person



                                Page 2 of 5 Pages

Item 1(a). Name of Issuer:

      The name of the issuer is StorageNetworks, Inc. (the "Issuer").

Item 1(b). Address of Issuer's Principal Executive Offices:

      The Issuer's principal executive offices are located at 225 Wyman Street
      Waltham, Mass. 02451

Item 2(a). Name of Person Filing:

      This report is being filed by TowerView LLC (the "Reporting Person").

Item 2(b). Address of Principal Business Office or, if None, Residence:

      The Reporting Person's principal business address is 500 Park Avenue, New
      York, New York 10022.

Item 2(c). Citizenship:

      The Reporting Person is a Limited Liability Company organized under the
      laws of Delaware.

Item 2(d). Title of Class of Securities:

      The report covers the Issuer's Common Stock (the "Shares"), $.01 value.

Item 2(e). CUSIP Number:

      The CUSIP number of the Shares is 86211E103.

Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or
        (c), Check Whether the Person Filing is a:

      (a)   |_| Broker and dealer registered under Section 15 of the Exchange

      (b)   |_| Bank as defined in Section 3(a)(6) of the Exchange Act.

      (c)   |_| Insurance company as defined in Section 3(a)(19) of the Exchange

      (d)   |_| Investment company registered under Section 8 of the Investment
                Company Act.

      (e)   |_| An investment adviser in accordance with Rule

      (f)   |_| An employee benefit plan or endowment fund in accordance with
                Rule 13d-1(b)(1)(ii)(F);

      (g)   |_| A parent holding company or control person in accordance with
                Rule 13d-1(b)(1)(ii)(G);

      (h)   |_| A savings association as defined in Section 3(b) of the Federal
                Deposit Insurance Act;

      (i)   |_| A church plan that is excluded from the definition of an
                investment company under Section 3(c)(14) of the Investment
                Company Act;

      (j)   |_| Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

                                Page 3 of 5 Pages

      If this statement is filed pursuant to Rule 13d-1(c), check this box. |X|

Item 4. Ownership

      (a) Amount beneficially owned: As of August 19, 2003 the Reporting Person
      beneficially owned 5,741,900 shares (the "Shares") of Common Stock.

      (b) Percent of class: As of August 1, 2003 the Issuer had outstanding
      99,469,272 shares of Common Stock. The 5,741,900 shares of Common Stock
      held beneficially by the Reporting Person represented 5.8% of the
      outstanding shares of Common Stock.

      (c) Number of Shares as to which the Reporting Person has:

            (i)   sole power to vote or direct the vote - 5,741,900 shares;

            (ii)  shared power to vote or to direct the vote -- none;

            (iii) sole power to dispose or direct the disposition of --
                  5,741,900 shares; and

            (iv)  shared power to dispose or to direct the disposition of --

Item 5. Ownership of Five Percent or Less of a Class

      If this statement is being filed to report the fact that as of the date
      hereof the reporting person has ceased to be the beneficial owner of more
      than five percent of the class of securities, check the following |_|.

Item 6. Ownership of More than Five Percent on Behalf of Another Person

      Not applicable.

Item 7. Identification and Classification of the Subsidiary Which Acquired The
        Security Being Reported on By The Parent Holding Company

      Not applicable.

Item 8. Identification and Classification of Members of the Group

      Not applicable.

Item 9. Notice of Dissolution of Group

      Not applicable.

Item 10. Certification

      By signing below I certify that, to the best of my knowledge and belief,
      the securities referred to above were not acquired and are not held for
      the purpose of or with the effect of changing or influencing the control
      of the issuer of the securities and were not acquired and are not held in
      connection with or as a participant in any transaction having that purpose
      or effect.

                                Page 4 of 5 Pages


      After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and

                                                  August 20, 2003

                                                 /s/ Daniel R. Tisch

                                            Daniel R. Tisch
                                            Authorized Signatory
                                            TowerView LLC

                                Page 5 of 5 Pages