POWER OF ATTORNEY
KNOW ALL BY THESE PRESENTS that the undersigned hereby constitutes and appoints
each of Christopher P. Marr, Timothy M. Martin, Jeffrey P. Foster and Doug
Tyrell signing singly, and with full power of substitution, the undersigned's
true and lawful attorney-in-fact to:

(1)           execute for and on behalf of the undersigned, in the undersigned's
  capacity as an officer and/or trustee of CubeSmart (the "Company"), Forms 3, 4
  and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934
and the rules thereunder;

(2)           execute for and on behalf of the undersigned Form 144s in
accordance with Rule 144 (Rule 144) promulgated under the Securities Act of
1933;

(3)           do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete and execute any such
  Form 3, 4, 5 or 144, and timely file such form with the United States
Securities and Exchange Commission and any stock exchange or similar authority;
and

(4)           take any other action of any type whatsoever in connection with
the foregoing which, in the opinion of such attorney-in-fact, may be of benefit
to, and in the best interest of, or legally required by, the undersigned.

The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
  could do if personally present, with full power of substitution or revocation,
  hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
  with Section 16 of the Securities Exchange Act of 1934 or Rule 144 of the
Securities Act of 1933;

The undersigned hereby revokes all powers of attorney with respect to the
matters herein contained, which the undersigned executed heretofore. This Power
of Attorney shall remain in full force and effect until the undersigned is no
longer required to file Forms 3, 4, 5 and 144 with respect to the undersigned's
holdings of and transactions in securities issued by the Company, unless earlier
  revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 11st day of July, 2017.





/s / Dororthy Dowling
Dororthy Dowling