v3.25.1
Cover
Jun. 11, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jun. 11, 2025
Registrant Name HARTMAN vREIT XXI, INC.
Entity Incorporation, State or Country Code MD
Entity File Number 333-207711
Entity Tax Identification Number 38-3978914
Entity Address, Address Line One 11211 Katy Freeway, Suite 309
Entity Address, State or Province TX
Entity Address, City or Town Houston
Entity Address, Postal Zip Code 77079
City Area Code 713
Local Phone Number 400 1000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Central Index Key 0001654948
Amendment Flag false
Entity Emerging Growth Company false