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SCHEDULE OF DEBT (Details) - USD ($) |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 01, 2020 | Sep. 30, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maturity date |  | Oct. 01, 2020 |  |  |  |  |  |
Mortgage notes payable, net |  |  | $ 86,255,680 |  | $ 120,029,696 |  | $ 142,392,992 |
Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | 86,929,031 |  | 120,788,005 |  | 143,459,049 |
Unamortized loan costs |  |  | (673,351) |  | (758,309) |  | (1,066,057) |
Mortgage notes payable, net |  |  |  |  | 120,029,696 |  | 142,392,992 |
Waterman Plaza [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  | [1] | $ 3,207,952 | [1],[2],[3] | 3,274,097 | [2],[3]
Interest rate, variable |  |  |  | [1] | 4.25% | [2],[3] |  |
Maturity date | [2],[3] |  |  |  | Apr. 29, 2021 |  |  |
World Plaza [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  | [4],[5] | $ 5,802,568 | [3],[4],[5],[6] | 4,979,384 | [3],[6]
Interest rate, variable |  |  | 2.91% | [4],[5] | 2.91% | [3],[6] |  |
Maturity date |  |  | Jul. 05, 2021 | [4],[5] | Jul. 05, 2021 | [3],[6] |  |
Garden Gateway Plaza [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  | [1] | $ 5,861,523 | [1],[3] | 6,071,315 | [3]
Maturity date |  |  | Aug. 05, 2021 | [1] | Aug. 05, 2021 | [3] |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.00% | [1] | 5.00% | [3] |  |
The 300 N.P [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 2,243,328 |  | $ 2,273,478 |  | 2,311,739 |
Maturity date |  |  | Jun. 11, 2022 |  | Jun. 11, 2022 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.95% |  | 4.95% |  |  |
Highland Court [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  | [1] | $ 6,274,815 | [1],[3] | 6,424,366 | [3]
Maturity date |  |  | Sep. 01, 2022 | [1] | Sep. 01, 2022 | [3] |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.82% | [1] | 3.82% | [3] |  |
Dakota Center [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 9,734,220 |  | $ 9,900,279 |  | 10,111,693 |
Maturity date |  |  | Jul. 06, 2024 |  | Jul. 06, 2024 | [7] |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.74% |  | 4.74% | [7] |  |
Research Parkway [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 1,719,390 |  | $ 1,760,432 |  | 1,813,305 |
Maturity date |  |  | Jan. 05, 2025 |  | Jan. 05, 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.94% |  | 3.94% |  |  |
Arapahoe Center [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 7,812,125 |  | $ 7,932,255 |  | 8,085,727 |
Maturity date |  |  | Jan. 05, 2025 |  | Jan. 05, 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.34% |  | 4.34% |  |  |
Union Town Center [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 8,197,495 |  | $ 8,315,550 |  | 8,440,000 |
Maturity date |  |  | Jan. 05, 2025 |  | Jan. 05, 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.28% |  | 4.28% |  |  |
One Park Centre [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 6,304,625 |  | $ 6,385,166 |  | 6,487,532 |
Maturity date |  |  | Sep. 05, 2025 |  | Sep. 05, 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.77% |  | 4.77% |  |  |
Genesis Plaza [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 6,196,202 |  | $ 6,276,273 |  | 6,378,110 |
Maturity date |  |  | Sep. 06, 2025 |  | Sep. 06, 2025 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.71% |  | 4.71% |  |  |
Shea Center II [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 17,559,316 |  | $ 17,727,500 |  | 17,727,500 |
Maturity date |  |  | Jan. 05, 2026 |  | Jan. 05, 2026 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.92% |  | 4.92% |  |  |
Executive Office Park [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  | [1] | $ 2,985,998 | [1],[7] | 4,839,577 | [7]
Maturity date |  |  | Jun. 01, 2027 | [1] | Jun. 01, 2027 | [7] |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.83% | [1] | 4.83% | [7] |  |
West Fargo Industrial [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 4,177,334 |  | $ 4,262,718 |  | 4,216,565 |
Maturity date |  |  | Aug. 05, 2029 |  | Aug. 05, 2029 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 3.27% |  | 3.27% |  |  |
Grand Pacific Center [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 3,649,729 | [8] | $ 3,738,142 | [6],[8] | 3,851,962 | [6]
Maturity date |  |  | Aug. 01, 2037 | [8] | Aug. 01, 2037 | [6] |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 4.02% | [8] | 4.02% | [6] |  |
Subtotal, Presidio Property Trust, Inc. Properties [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 67,593,764 |  | $ 92,704,649 |  | 110,814,920 |
Model Home [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  | $ 19,335,267 | [5] | 28,083,356 | [3],[5] | 32,644,129 | [3]
Model Home [Member] | Mortgage Notes [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 2.50% |  |  |  |  |
Model Home [Member] | Mortgage Notes [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.63% |  |  |  |  |
Union Terrace [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable | [7] |  |  |  |  |  | 6,240,396 |
Maturity date |  |  |  |  | Aug. 05, 2024 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | [7] |  |  |  | 4.50% |  |  |
Centennial Tech Center [Member] | Mortgage Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Mortgage notes payable |  |  |  |  |  |  | $ 9,561,652 |
Maturity date |  |  |  |  | Dec. 05, 2024 |  |  |
Debt Instrument, Interest Rate, Stated Percentage | [7] |  |  |  | 4.43% |  |  |
[1] | Waterman Plaza and Garden Gateway Plaza were sold during the first quarter of 2021, while Highland Court and Executive Office Park were sold in the second quarter of 2021.
[2] | Interest on this loan resets annually at LIBOR plus 3.00%, with a floor of 4.25%
[3] | Properties held for sale as of December 31, 2020. Seven model homes were included as held for sale.
[4] | During June 2021, this loan was paid in full with cash from the sale of other properties and excess cash on hand.
[5] | Property held for sale as of September 30, 2021. There were three model homes included as real estate assets held for sale.
[6] | Interest on this loan is ABR + 0.75% and LIBOR plus 2.75%. For the year-ended December 31, 2020, the weighted average interest rate was 3.37%.
[7] | Property sold during the year ended December 31, 2020, see Footnote 3 above for further detail. One of four buildings at Executive Office Park were sold.
[8] | Interest rate is subject to reset on September 1, 2023.

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