v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
Apr. 24, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-34383  
Entity Registrant Name Seven Hills Realty Trust  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 20-4649929  
Entity Address, Address Line One Two Newton Place  
Entity Address, Address Line Two 255 Washington Street  
Entity Address, Address Line Three Suite 300  
Entity Address, City or Town Newton  
Entity Address, State or Province MA  
Entity Address, Postal Zip Code 02458-1634  
City Area Code 617  
Local Phone Number 332-9530  
Title of 12(b) Security Common Shares of Beneficial Interest  
Trading Symbol SEVN  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   22,596,077
Entity Central Index Key 0001452477  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1