Cover Page - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 23, 2020	Jun. 30, 2019
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2019
Document Transition Report	false
Entity File Number	000-54382
Entity Registrant Name	PACIFIC OAK STRATEGIC OPPORTUNITY REIT, INC.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	26-3842535
Entity Address, Address Line One	11150 Santa Monica Blvd.
Entity Address, Address Line Two	Suite 400
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90025
City Area Code	424
Local Phone Number	208-8100
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		65,847,283
Entity Central Index Key	0001452936
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Public Float			$ 0