| Cover | Nov. 05, 2021 |
| Entity Addresses [Line Items] | |
| Document Type | S-11 |
| Amendment Flag | false |
| Entity Registrant Name | Presidio Property Trust, Inc. |
| Entity Central Index Key | 0001080657 |
| Entity Address, Address Line One | 4995 Murphy Canyon Road |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, Address Line Three | San Diego |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92123 |
| City Area Code | (760) |
| Local Phone Number | 471-8536 |
| Entity Filer Category | Non-accelerated Filer |
| Entity Small Business | true |
| Entity Emerging Growth Company | false |
| Document Creation Date | Nov. 8, 2000 |
| Business Contact [Member] | |
| Entity Addresses [Line Items] | |
| Entity Address, Address Line One | 4995 Murphy Canyon Road |
| Entity Address, Address Line Two | Suite 300 |
| Entity Address, Address Line Three | San Diego |
