| Cover | Oct. 29, 2021 |
| Affiliate, Collateralized Security [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 29, 2021 |
| Entity File Number | 001-34049 |
| Entity Registrant Name | Presidio Property Trust, Inc. |
| Entity Central Index Key | 0001080657 |
| Entity Tax Identification Number | 33-0841255 |
| Entity Incorporation, State or Country Code | MD |
| Entity Address, Address Line One | 4995 Murphy Canyon Road |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, City or Town | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92123 |
| City Area Code | (760) |
| Local Phone Number | 471-8536 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
| Series A Common Stock, $0.01 par value per share | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | Series A Common Stock, $0.01 par value per share |
| Trading Symbol | SQFT |
| Security Exchange Name | NASDAQ |
| 9.375% Series D Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share | |
| Affiliate, Collateralized Security [Line Items] | |
| Title of 12(b) Security | 9.375% Series D Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share |
| Trading Symbol | SQFTP |
| Security Exchange Name | NASDAQ |
