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                 [letterhead of Armstrong Teasdale LLP]



                               May 8, 2000



Enterbank Holdings, Inc.
150 North Meramec Avenue
St. Louis, Missouri 63105

      Re:   ENTERBANK HOLDINGS, INC. - REGISTRATION STATEMENT ON FORM S-4

Ladies and Gentlemen:

      With reference to the Registration Statement on Form S-4 filed by
Enterbank Holdings, Inc., a Delaware corporation ("Enterbank"), with the
Securities and Exchange Commission in connection with the registration under
the Securities Act of 1933, as amended, of 2,049,135 shares of Enterbank
Common Stock, $.01 par value (the "Shares"), to be issued in connection with
the merger contemplated by the Agreement and Plan of Merger dated as of
January 5, 2000, as amended (the "Agreement"), by and between Enterbank and
Commercial Guaranty Bancshares, Inc., a Kansas corporation, which Agreement
is described therein and filed as an exhibit thereto:

      We are of the opinion that the Shares have been duly authorized and,
when issued in accordance with the Agreement, will be legally issued, fully
paid and nonassessable. We hereby consent to the filing of this opinion as
Exhibit 5.1 to the Registration Statement and the use of our name under the
caption "Legal Matters" in the Registration Statement and in the Joint Proxy
Statement/Prospectus included therein.


                                       Armstrong Teasdale LLP


                                       /s/ Armstrong Teasdale LLP

