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Note 7 - Mortgage Notes Payable - Mortgage Notes Payable (Details) - USD ($) | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Mortgage Notes Payable, net |  | $ 96,898,699 | $ 88,859,832
Mortgage Notes [Member] |  |  |
Mortgage Notes Payable |  | 97,751,655 | 89,422,132
Unamortized loan costs |  | (852,956) | (562,300)
Mortgage Notes [Member] | The 300 N.P [Member] |  |  |
Mortgage Notes Payable | [1] | $ 0 | 2,232,923
Interest rate | [1],[2] | 4.95% |
Mortgage Notes [Member] | Dakota Center [Member] |  |  |
Mortgage Notes Payable |  | $ 9,442,976 | 9,677,108
Interest rate | [2] | 4.74% |
Mortgage Notes [Member] | Research Parkway [Member] |  |  |
Mortgage Notes Payable |  | $ 1,648,237 | 1,705,438
Interest rate | [2] | 3.94% |
Mortgage Notes [Member] | Arapahoe Center [Member] |  |  |
Mortgage Notes Payable |  | $ 7,602,273 | 7,770,887
Interest rate | [2] | 4.34% |
Mortgage Notes [Member] | Union Town Center [Member] |  |  |
Mortgage Notes Payable |  | $ 8,025,300 | 8,173,568
Interest rate | [2] | 4.28% |
Mortgage Notes [Member] | One Park Centre [Member] |  |  |
Mortgage Notes Payable |  | $ 6,163,177 | 6,276,849
Interest rate | [2] | 4.77% |
Mortgage Notes [Member] | Genesis Plaza [Member] |  |  |
Mortgage Notes Payable |  | $ 6,055,682 | 6,168,604
Interest rate | [2] | 4.71% |
Mortgage Notes [Member] | Shea Center II [Member] |  |  |
Mortgage Notes Payable |  | $ 17,229,573 | 17,494,527
Interest rate | [2] | 4.92% |
Mortgage Notes [Member] | West Fargo Industrial [Member] |  |  |
Mortgage Notes Payable | [3] | $ 4,030,297 | 4,148,405
Interest rate | [2],[3] | 3.27% |
Mortgage Notes [Member] | Grand Pacific Center [Member] |  |  |
Mortgage Notes Payable | [4],[5] | $ 3,496,330 | 3,619,695
Interest rate | [2],[4],[5] | 4.02% |
Mortgage Notes [Member] | Baltimore [Member] |  |  |
Mortgage Notes Payable |  | $ 5,670,000 | 0
Interest rate | [2] | 4.67% |
Mortgage Notes [Member] | Mandolin [Member] |  |  |
Mortgage Notes Payable |  | $ 3,635,362 | 0
Interest rate | [2] | 4.35% |
Mortgage Notes [Member] | Subtotal, Presidio Property Trust, Inc. Properties [Member] |  |  |
Mortgage Notes Payable |  | $ 72,999,207 | 67,268,004
Mortgage Notes [Member] | Model Home [Member] |  |  |
Mortgage Notes Payable | [5],[6] | $ 24,752,448 | $ 22,154,128
[1] | The mortgage note payable for 300 N.P. is an amortizing loan with a balloon payment of $2.2 million due at maturity, on June 11, 2022. The Company paid this note in full on May 11, 2022 with available cash on hand.
[2] | Interest rates as of September 30, 2022.
[3] | Interest rate is subject to possible reset on August 5, 2023.
[4] | Interest rate is subject to possible reset on September 1, 2023.
[5] | Property held for sale as of September 30, 2022. There were three model homes included as real estate assets held for sale.
[6] | Our model homes have stand-alone mortgage notes at interest rates ranging from 2.50% to 5.34% per annum as of September 30, 2022.

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