| Document and Entity Information | Aug. 14, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 14, 2024 |
| Entity File Number | 001-41917 |
| Entity Registrant Name | Smith Douglas Homes Corp. |
| Entity Central Index Key | 0001982518 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 93-1969003 |
| Entity Address, Address Line One | 110 Village Trail, Suite 215 |
| Entity Address, City or Town | Woodstock |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30188 |
| City Area Code | 770 |
| Local Phone Number | 213-8067 |
| Title of 12(b) Security | Class A common stock, $0.0001 par value per share |
| Trading Symbol | SDHC |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | true |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
