Submission	Mar. 02, 2026
Submission [Line Items]
Central Index Key	0001298675
Registrant Name	CubeSmart
Registration File Number	333-293922
Form Type	S-3
Submission Type	424B5
Fee Exhibit Type	EX-FILING FEES
Offering Table N/A
Offset Table N/A
Combined Prospectus Table N/A	N/A

Offerings - Offering: 1	Mar. 02, 2026 USD ($) shares
Offering:
Fee Previously Paid	false
Rule 457(a)	true
Security Type	Equity
Security Class Title	Common Shares, $0.01 par value per share
Amount Registered \| shares	13,510,817
Proposed Maximum Offering Price per Unit	39.72
Maximum Aggregate Offering Price	$ 536,649,651.24
Fee Rate	0.01381%
Amount of Registration Fee	$ 74,111.32
Offering Note	Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act of 1933, as amended (the "Securities Act"), based on the average of the high and low prices of our common shares of beneficial interest, par value $0.01 per share ("Common Shares"), on The New York Stock Exchange on February 24, 2026. The proposed maximum offering price per Common Share will be determined from time to time in connection with, and at the time of, the sale of the Common Shares registered hereunder. This registration fee table shall be deemed to update the "Calculation of Filing Fee Tables" in the Company's Registration Statement on Form S-3 (File No. 333-293922) filed on March 2, 2026 in accordance with Rules 456(b) and 457(r) under the Securities Act.

Offsets	Mar. 02, 2026 USD ($) shares
Offset: 1
Offset Payment:
Offset Claimed	true
Rule 457(p) Offset	true
Registrant or Filer Name	CubeSmart
Form or Filing Type	S-3
File Number	333-270248
Initial Filing Date	Mar. 03, 2025
Fee Offset Claimed	$ 60,611.09
Security Type Associated with Fee Offset Claimed	Equity
Security Title Associated with Fee Offset Claimed	Common Shares, $0.01 par value per share
Unsold Securities Associated with Fee Offset Claimed \| shares	10,000,000
Termination / Withdrawal Statement	On March 3, 2025, CubeSmart filed a 425(b)(5) prospectus supplement (the "2025 Prospectus Supplement") to the base prospectus contained in its Registration Statement on Form S-3 (File No. 333-270248) (the "2023 Registration Statement") in connection with its "at-the-market" offering program (the "ATM Program"). In connection with the 2025 Prospectus Supplement, CubeSmart owed a filing fee of $85,036.29 to register the offering of 13,510,817 common shares, of which $13,500.23 was applied from registration fees previously paid for unsold securities under the CubeSmart prospectus supplement dated March 3, 2023 (the "2023 Prospectus Supplement") to the base prospectus contained in the 2023 Registration Statement, such that CubeSmart contemporaneously paid a filing fee to the SEC in the amount of $71,536.06 in connection with the 2025 Prospectus Supplement. No shares of beneficial interest were sold under the 2025 Prospectus Supplement and 13,510,817 shares of beneficial interest registered in connection with the ATM Program remain unsold as of the date hereof. CubeSmart has terminated the offering that included the unsold shares of beneficial interest under the 2025 Prospectus Supplement.
Offset: 2
Offset Payment:
Offset Claimed	true
Rule 457(p) Offset	true
Registrant or Filer Name	CubeSmart
Form or Filing Type	S-3
File Number	333-270248
Initial Filing Date	Mar. 03, 2023
Fee Offset Claimed	$ 13,500.23
Security Type Associated with Fee Offset Claimed	Equity
Security Title Associated with Fee Offset Claimed	Common Shares, $0.01 par value per share
Unsold Securities Associated with Fee Offset Claimed \| shares	3,510,817
Termination / Withdrawal Statement	On March 4, 2020, CubeSmart filed a 425(b)(5) prospectus supplement (the "2020 Prospectus Supplement") to the base prospectus contained in its Registration Statement on Form S-3 (File No. 333-236886) (the "2020 Registration Statement") in connection with the ATM Program. In connection with the 2020 Prospectus Supplement, CubeSmart owed and paid a filing fee of $55,985.08 to register the offering of 14,559,259 common shares. 8,711,961 common shares were sold under the 2020 Prospectus Supplement and the 5,847,298 common shares that remained unsold under the 2020 Prospectus Supplement were carried forward to the 2023 Prospectus Supplement. At the time of filing the 2025 Prospectus Supplement, 3,510,817 common shares remained unsold under the 2023 Prospectus Supplement (the "Unsold Securities"), which represent $13,500.23 of the registration fee paid by CubeSmart contemporaneously with filing the 2020 Prospectus Supplement.
Offset: 3
Offset Payment:
Offset Claimed	false
Rule 457(p) Offset	true
Registrant or Filer Name	CubeSmart
Form or Filing Type	S-3
File Number	333-270248
Filing Date	Mar. 03, 2025
Fee Paid with Fee Offset Source	$ 71,536.06
Offset Note	Pursuant to Rule 457(p) under the Securities Act, the registration fee of $74,111.32 due under this prospectus supplement is offset by $74,111.32 of the unused registration fee in the aggregate amount of $85,036.29 paid in connection with the 2025 Prospectus Supplement and the Unsold Securities.
Offset: 4
Offset Payment:
Offset Claimed	false
Rule 457(p) Offset	true
Registrant or Filer Name	CubeSmart
Form or Filing Type	S-3
File Number	333-270248
Filing Date	Mar. 03, 2023
Fee Paid with Fee Offset Source	$ 13,500.23
Offset Note	See Offset Note 3.

Fees Summary	Mar. 02, 2026 USD ($)
Fees Summary [Line Items]
Total Offering	$ 536,649,651.24
Previously Paid Amount	0.00
Total Fee Amount	74,111.32
Total Offset Amount	74,111.32
Net Fee	$ 0.00
Final Prospectus	false