v3.26.1
Cover - shares
3 Months Ended
Mar. 31, 2026
May 26, 2026
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity File Number 001-42962  
Entity Registrant Name HALL CHADWICK ACQUISITION CORP.  
Entity Central Index Key 0002079013  
Entity Tax Identification Number 98-1830736  
Entity Incorporation, State or Country Code E9  
Entity Address, Address Line One 1 North Bridge Road  
Entity Address, Address Line Two #18-06 High Street Centre  
Entity Address, City or Town Singapore  
Entity Address, Country SG  
Entity Address, Postal Zip Code 179094  
City Area Code +65  
Local Phone Number 9088 2642  
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  
Elected Not To Use the Extended Transition Period false  
Entity Shell Company true  
Units, each consisting of one Class A ordinary share and one share right    
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one share right  
Trading Symbol HCACU  
Security Exchange Name NASDAQ  
Class A ordinary shares, par value $0.0001 per share    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share  
Trading Symbol HCAC  
Security Exchange Name NASDAQ  
Share Rights, each right entitling the holder to receive one tenth (1/10) of a Class A ordinary share     
Title of 12(b) Security Share Rights, each right entitling the holder to receive one tenth (1/10) of a Class A ordinary share   
Trading Symbol HACAR  
Security Exchange Name NASDAQ  
Class A Ordinary Shares [Member]    
Entity Common Stock, Shares Outstanding   21,314,000
Class B Ordinary Shares [Member]    
Entity Common Stock, Shares Outstanding   7,886,293