Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2020	May 14, 2020
Document and Entity Information
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Registrant Name	SANDSTON CORP
Entity Central Index Key	0000892832
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Trading Symbol	SDON
Entity Common Stock, Shares Outstanding		17,420,683
Entity Emerging Growth Company	false
Entity Shell Company	true
Entity Small Business	true