Earnings per share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2024
Numerator [Abstract]
Net income attributable to Smith Douglas Homes Corp, Basic	$ 3,646	$ 6,618	$ 6,618
Add: Net income impact from assumed redemption of all LLC Interests to common stock	21,088	39,762
Less: Income tax expense on net income attributable to NCI at 20.8%	(4,384)	(8,267)
Net income attributable to Smith Douglas Homes Corp., after adjustment for assumed redemption, Diluted	$ 20,350	$ 38,113
Denominator [Abstract]
Weighted average shares of common stock outstanding, Basic (in shares)	8,846,154	8,846,154
Dilutive effects of [Abstract]
LLC Interests that are exchangeable for common stock (in shares)	42,435,897	42,435,897
Unvested RSUs (in shares)	149,923	132,458
Weighted average shares of common stock outstanding, Diluted (in shares)	51,431,974	51,414,509
Basic earnings per share (in dollars per share)	$ 0.41	$ 0.75
Diluted earnings per share (in dollars per share)	$ 0.4	$ 0.74
Income tax expense attributable to non controlling interest	20.80%	20.80%