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Note 7 - Mortgage Notes Payable - Mortgage Notes Payable (Details) - USD ($) | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Mortgage Notes Payable, net |  | $ 92,074,367 | $ 102,094,094
Mortgage Notes [Member] |  |  |
Mortgage Notes Payable |  | 92,921,683 | 102,842,069
Unamortized loan costs |  | (847,316) | (747,975)
Mortgage Notes [Member] | Dakota Center [Member] |  |  |
Mortgage Notes Payable | [1] | $ 8,739,687 | 9,091,395
Interest rate | [1],[2] | 4.74% |
Mortgage Notes [Member] | Research Parkway [Member] |  |  |
Mortgage Notes Payable | [3] | $ 0 | 1,526,860
Mortgage Notes [Member] | Arapahoe Center [Member] |  |  |
Mortgage Notes Payable |  | $ 8,670,000 | 8,670,000
Interest rate | [2] | 6.75% |
Mortgage Notes [Member] | Union Town Center [Member] |  |  |
Mortgage Notes Payable | [3] | $ 0 | 7,709,746
Mortgage Notes [Member] | One Park Centre [Member] |  |  |
Mortgage Notes Payable |  | $ 6,096,528 | 5,919,517
Interest rate | [2] | 6.83% |
Mortgage Notes [Member] | Genesis Plaza [Member] |  |  |
Mortgage Notes Payable |  | $ 6,235,986 | 5,813,843
Interest rate | [2] | 7.07% |
Mortgage Notes [Member] | Shea Center II [Member] |  |  |
Mortgage Notes Payable | [4] | $ 16,353,296 | 16,660,803
Interest rate | [2],[4] | 4.92% |
Mortgage Notes [Member] | West Fargo Industrial [Member] |  |  |
Mortgage Notes Payable |  | $ 5,750,000 | 5,750,000
Interest rate | [2] | 7.14% |
Mortgage Notes [Member] | Grand Pacific Center [Member] |  |  |
Mortgage Notes Payable |  | $ 6,360,819 | 6,460,405
Interest rate | [2] | 6.35% |
Mortgage Notes [Member] | Baltimore [Member] |  |  |
Mortgage Notes Payable |  | $ 5,670,000 | 5,670,000
Interest rate | [2] | 4.67% |
Mortgage Notes [Member] | Mandolin [Member] |  |  |
Mortgage Notes Payable |  | $ 3,440,873 | 3,508,702
Interest rate | [2] | 4.35% |
Mortgage Notes [Member] | Subtotal, Presidio Property Trust, Inc. Properties [Member] |  |  |
Mortgage Notes Payable |  | $ 67,317,189 | 76,781,271
Mortgage Notes [Member] | Model Home [Member] |  |  |
Mortgage Notes Payable | [5] | $ 25,604,494 | $ 26,060,798
Mortgage Notes [Member] | Model Home [Member] | Minimum [Member] |  |  |
Interest rate | [2],[5] | 5.94% |
Mortgage Notes [Member] | Model Home [Member] | Maximum [Member] |  |  |
Interest rate | [2],[5] | 8.00% |
[1] | The non-recourse loan on the Dakota Center property matured on July 6, 2024. During December 2024, the lender agreed to the broker the Company would use to sell the property to settle the non-recourse debt. As of December 31, 2025, the property was included in the real estate assets held for sale, net on the consolidated balance sheet. During July 2025, the lender approved a purchase offer from a third party for $5,125,000. The property was subsequently sold as of January 2026. See Note 4. Real Estate Assets above for further discussion on impairment of the property.
[2] | Interest rates as of December 31, 2025.
[3] | These properties were sold during February 2025 and their loan balances were paid in full.
[4] | During the year ended December 31, 2025, the Company impaired Shea Center II for a total of approximately $2.5 million after low property occupancy triggered a cash management event under the terms of the loan agreement. Subsequent to the year ended December 31, 2025, the Company received a notice that the Company's failure to repay in full by January 5, 2026 the indebtedness related to the loan agreement governing Shea Center II had triggered a default event. The Company has received notification that the Shea Center II property governed by this agreement will be moved into receivership, which will fulfill its obligation for this non-recourse loan.
[5] | As of December 31, 2025, there were five model homes included as real estate assets held for sale. Our model homes have stand-alone mortgage notes at interest rates ranging from 5.94% to 8.0% per annum as of December 31, 2025.

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