Supplemental Guarantor Information - Unaudited Condensed Consolidating Statements of Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	$ (72,062)	$ (59,885)
Cash flows from investing activities:
Capital expenditures	(5,677)	(6,017)
Proceeds from sale of fixed assets	74	2,471
Investments in unconsolidated entities	(2,411)	(2,787)
Return of capital from unconsolidated entities	1,621	1,141
Increases in restricted cash	(6,730)	(1,770)
Decreases in restricted cash	6,439	23,392
Advances to/from subsidiaries	0	0
Net cash (used in) provided by investing activities	(6,684)	16,430
Cash flows from financing activities:
Repayment of debt	(256,207)	(208,221)
Proceeds from issuance of new debt	250,000	137,900
Borrowings from credit facility	25,000	25,000
Repayment of borrowings from credit facility	25,000	25,000
Debt issuance costs	(4,721)	(2,451)
Advances to/from subsidiaries	0	0
Other financing activities	(388)	(423)
Net cash used in financing activities	(11,316)	(73,195)
Decrease in cash and cash equivalents	(90,062)	(116,650)
Cash and cash equivalents at beginning of period	228,871	251,583
Cash and cash equivalents at end of period	138,809	134,933
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	0	0
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of fixed assets	0	0
Investments in unconsolidated entities	0	0
Return of capital from unconsolidated entities	0	0
Increases in restricted cash	0	0
Decreases in restricted cash	0	0
Advances to/from subsidiaries	20,009	17,322
Net cash (used in) provided by investing activities	20,009	17,322
Cash flows from financing activities:
Repayment of debt	0	0
Proceeds from issuance of new debt	0	0
Borrowings from credit facility	0	0
Repayment of borrowings from credit facility	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	(20,747)	(20,900)
Other financing activities	0	0
Net cash used in financing activities	(20,747)	(20,900)
Decrease in cash and cash equivalents	(738)	(3,578)
Cash and cash equivalents at beginning of period	(4,500)	(3,192)
Cash and cash equivalents at end of period	(5,238)	(6,770)
Beazer Homes USA, Inc.
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(44,754)	(32,839)
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of fixed assets	0	0
Investments in unconsolidated entities	0	0
Return of capital from unconsolidated entities	0	0
Increases in restricted cash	(3,424)	(656)
Decreases in restricted cash	2,947	22,368
Advances to/from subsidiaries	(20,019)	(17,322)
Net cash (used in) provided by investing activities	(20,496)	4,390
Cash flows from financing activities:
Repayment of debt	(253,000)	(203,679)
Proceeds from issuance of new debt	250,000	137,900
Borrowings from credit facility	25,000	25,000
Repayment of borrowings from credit facility	25,000	25,000
Debt issuance costs	(4,721)	(2,451)
Advances to/from subsidiaries	0	0
Other financing activities	(388)	(423)
Net cash used in financing activities	(8,109)	(68,653)
Decrease in cash and cash equivalents	(73,359)	(97,102)
Cash and cash equivalents at beginning of period	215,646	232,226
Cash and cash equivalents at end of period	142,287	135,124
Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(27,243)	(26,968)
Cash flows from investing activities:
Capital expenditures	(5,677)	(6,017)
Proceeds from sale of fixed assets	74	2,471
Investments in unconsolidated entities	(2,411)	(2,787)
Return of capital from unconsolidated entities	1,621	1,141
Increases in restricted cash	(3,306)	(1,114)
Decreases in restricted cash	3,492	1,024
Advances to/from subsidiaries	0	0
Net cash (used in) provided by investing activities	(6,207)	(5,282)
Cash flows from financing activities:
Repayment of debt	(3,207)	(4,542)
Proceeds from issuance of new debt	0	0
Borrowings from credit facility	0	0
Repayment of borrowings from credit facility	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	20,747	20,888
Other financing activities	0	0
Net cash used in financing activities	17,540	16,346
Decrease in cash and cash equivalents	(15,910)	(15,904)
Cash and cash equivalents at beginning of period	16,866	21,543
Cash and cash equivalents at end of period	956	5,639
Non-Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net cash used in operating activities	(65)	(78)
Cash flows from investing activities:
Capital expenditures	0	0
Proceeds from sale of fixed assets	0	0
Investments in unconsolidated entities	0	0
Return of capital from unconsolidated entities	0	0
Increases in restricted cash	0	0
Decreases in restricted cash	0	0
Advances to/from subsidiaries	10	0
Net cash (used in) provided by investing activities	10	0
Cash flows from financing activities:
Repayment of debt	0	0
Proceeds from issuance of new debt	0	0
Borrowings from credit facility	0	0
Repayment of borrowings from credit facility	0	0
Debt issuance costs	0	0
Advances to/from subsidiaries	0	12
Other financing activities	0	0
Net cash used in financing activities	0	12
Decrease in cash and cash equivalents	(55)	(66)
Cash and cash equivalents at beginning of period	859	1,006
Cash and cash equivalents at end of period	$ 804	$ 940