Cover - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Feb. 08, 2021	Jun. 30, 2020
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2020
Document Annual Report	true
Document Transition Report	false
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity File Number	1-12378
Trading Symbol	NVR
Title of 12(b) Security	Common stock, par value $0.01 per share
Entity Central Index Key	0000906163
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		3,681,181
Entity Public Float			$ 11,374,674
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Current Fiscal Year End Date	--12-31
Entity Registrant Name	NVR, Inc.
Local Phone Number	956-4000
Entity Address, Postal Zip Code	20190
Entity Address, City or Town	Reston,
Entity Address, Address Line One	11700 Plaza America Drive, Suite 500
Entity Address, State or Province	VA
Entity Tax Identification Number	54-1394360
ICFR Auditor Attestation Flag	true
City Area Code	703
Entity Incorporation, State or Country Code	VA
Security Exchange Name	NYSE