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Cover - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Feb. 13, 2025
Jun. 28, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
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 stock, $0.001 par value per share    
Trading Symbol SEVN    
Security Exchange Name NASDAQ    
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 true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 160.3
Entity Common Stock, Shares Outstanding   14,902,773  
Documents Incorporated by Reference
Certain information required by Items 10, 11, 12, 13 and 14 of Part III of this Annual Report on Form 10-K is incorporated by reference to our definitive Proxy Statement for the 2025 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission within 120 days after the fiscal year ended December 31, 2024.
    
Entity Central Index Key 0001452477    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY