Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2019
Feb. 13, 2020
Jun. 28, 2019
Cover page.      
Entity Registrant Name TopBuild Corp    
Entity Central Index Key 0001633931    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 001-36870    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-3096382    
Entity Address, Address Line One 475 North Williamson Boulevard    
Entity Address, City or Town Daytona Beach    
Entity Address, State or Province FL    
Entity Address, Postal Zip Code 32114    
City Area Code 386    
Local Phone Number 304-2200    
Title of 12(b) Security Common stock, par value $0.01 per share    
Trading Symbol BLD    
Security Exchange Name NYSE    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Entity Filer Category Large Accelerated Filer    
Entity Common Stock, Shares Outstanding   33,486,521  
Entity Public Float     $ 2.8
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false