Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2021	Aug. 16, 2021
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2021
Entity File Number	333-252307
Entity Registrant Name	CROWN PROPTECH ACQUISITIONS
Entity Incorporation, State or Country Code	E9
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	667 Madison Avenue, 12th Floor
Entity Address, City or Town	New York
Entity Address State Or Province	NY
Entity Address, Postal Zip Code	10065
City Area Code	212
Local Phone Number	563-6400
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Central Index Key	0001827899
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Units, each consisting of one share of Class A Common Stock and one-half of one Warrant
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant
Trading Symbol	CPTK U
Security Exchange Name	NYSE
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	CPTK
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		27,600,000
Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Document Information [Line Items]
Title of 12(b) Security	Redeemable warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50
Trading Symbol	CPTK WS
Security Exchange Name	NYSE
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		6,900,000