QuickLinks -- Click here to rapidly navigate through this document

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): September 10, 2004

AmeriVest Properties Inc.
(Exact name of small business issuer as specified in its charter)

Maryland   1-14462   84-1240264
(State or other jurisdiction of
incorporation or organization)
  (Commission
File No.)
  (I.R.S. Employer
Identification No.)

1780 South Bellaire Street Suite 100, Denver, Colorado 80222
(Address of principal executive offices)

(303) 297-1800
(Registrant's telephone number)

N/A
(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o
Written communications pursuant to Rule 425 under the Securities Act

o
Soliciting material pursuant to Rule 14a-12 under the Exchange Act

o
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act

o
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act


ITEM 5.03 AMENDMENTS TO ARTICLES OF INCORPORATION OR BYLAWS; CHANGE IN FISCAL YEAR.

        On September 10, 2004, the Board of Directors of AmeriVest Properties Inc. ("AmeriVest") amended AmeriVest's bylaws to clarify that for the purposes of Article VI of the bylaws regarding conflicting interest transactions, the term "Affiliate" does not include any "person" that is directly or indirectly owned one hundred percent (100%) by the corporation. A copy of the amendment is included as an exhibit to this report under Item 9.01(c).


ITEM 9.01 FINANCIAL STATEMENTS AND EXHIBITS

2



SIGNATURES

        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 thereunto duly authorized.


 

 

AMERIVEST PROPERTIES INC.

Dated: September 15, 2004

 

By:

 

/s/  
KATHRYN L. HALE      
Kathryn L. Hale
Chief Financial Officer

3




QuickLinks

SIGNATURES