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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS
 12 Months Ended
Sep. 30, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS
SCHEDULE II

GRIFFON CORPORATION

VALUATION AND QUALIFYING ACCOUNTS
For the Years Ended September 30, 2021, 2020 and 2019
(in thousands)

DescriptionBalance at
Beginning of
 Year		AdditionsReductionsOther Balance at
End of Year
FOR THE YEAR ENDED SEPTEMBER 30, 2021    
Allowance for Doubtful Accounts$8,178 $795 $(393)$207 $8,787 
Inventory valuation$18,903 $24,400 $(12,099)$401 $31,605 
Deferred tax valuation allowance$9,824 $601 $— $— $10,425 
FOR THE YEAR ENDED SEPTEMBER 30, 2020    
Allowance for Doubtful Accounts$7,588 $5,175 $(4,584)$(1)$8,178 
Inventory valuation$15,218 $6,771 $(3,412)$326 $18,903 
Deferred tax valuation allowance$10,823 $— $(999)$— $9,824 
FOR THE YEAR ENDED SEPTEMBER 30, 2019    
Allowance for Doubtful Accounts     
Allowance for Doubtful Accounts$6,115 $6,253 $(4,799)$19 $7,588 
Inventory valuation$15,940 $1,947 $(2,614)$(55)$15,218 
Deferred tax valuation allowance$8,520 $2,303 $— $— $10,823