Document and Entity Information - shares	3 Months Ended
	Feb. 28, 2019	Mar. 29, 2019
Document and Entity Information
Entity Registrant Name	GRIFFIN INDUSTRIAL REALTY, INC.
Entity Central Index Key	0001037390
Document Type	10-Q
Document Period End Date	Feb. 28, 2019
Amendment Flag	false
Current Fiscal Year End Date	--11-30
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		5,065,173
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1