| Document and Entity Information | Jan. 21, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001692376 |
| Document Type | 8-K |
| Document Period End Date | Jan. 21, 2022 |
| Entity Registrant Name | Velocity Financial, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39183 |
| Entity Tax Identification Number | 46-0659719 |
| Entity Address, Address Line One | 30699 Russell Ranch Road |
| Entity Address, Address Line Two | Suite 295 |
| Entity Address, City or Town | Westlake Village |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91362 |
| City Area Code | (818) |
| Local Phone Number | 532-3700 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common stock, par value $0.01 per share |
| Trading Symbol | VEL |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
