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Cover - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 26, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-32375    
Entity Registrant Name Comstock Holding Companies, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 20-1164345    
Entity Address, Address Line One 1900 Reston Metro Plaza    
Entity Address, Address Line Two 10th Floor    
Entity Address, City or Town Reston    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 20190    
City Area Code 703    
Local Phone Number 230-1985    
Title of 12(b) Security Class A common stock, par value $0.01 per share    
Trading Symbol CHCI    
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    
Entity Shell Company false    
Entity Public Float     $ 6,564,736
Entity Common Stock, Shares Outstanding   8,296,212  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive proxy statement relating to the 2021 annual meeting of stockholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A are incorporated by reference into Part III of this Annual Report on Form 10-K.
    
Amendment Flag false    
Document Period End Date Dec. 31, 2020    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001299969    
Current Fiscal Year End Date --12-31