Table Data - New Private Housing Units Authorized by Building Permits: 1-Unit Structures for Washington

Title New Private Housing Units Authorized by Building Permits: 1-Unit Structures for Washington
Series ID WABP1FHSA
Source U.S. Census Bureau
Release Housing Units Authorized By Building Permits (Not a Press Release)
Seasonal Adjustment Seasonally Adjusted
Frequency Monthly
Units Units
Date Range 1988-01-01 to 2026-07-01
Last Updated 2026-08-25 8:46 AM CDT
Notes This series represents the total number of building permits for 1-unit structure types. The 1-unit structure type is a single-family home or house. A single-family home or house types include fully detached, semidetached (semidetached, side-by-side), row houses, and townhouses. For attached units, each must be separated from the adjacent unit by a ground-to-roof wall in order to be classified as a single-family structure. These units also must not share heating/air-conditioning systems or utilities. Units built on top of one another and those built side-by-side that do not have a ground-to-roof wall and/or have common facilities (i.e., attic, basement, heating plant, plumbing, etc.) are not included under single-family structures.

The Federal Reserve Bank of St. Louis seasonally adjusts this series by using the 'statsmodels' library from Python with default parameter settings. The package uses the U.S. Bureau of the Census X-13ARIMA-SEATS Seasonal Adjustment Program. More information on the 'statsmodels' X-13ARIMA-SEATS package can be found here. More information on X-13ARIMA-SEATS can be found here.

Many series include both seasonally adjusted (SA) and not seasonally adjusted (NSA) data. Occasionally, updates to the data will not include sufficient seasonal factors to trigger a seasonal adjustment. In these cases, the NSA series will be updated normally; but the SA series will also be updated with the NSA data. The NSA series can be located here here.

Some seasonally adjusted series may exhibit negative values because they are created from a seasonal adjustment process regardless of the actual meaning or interpretation of the given indicator.
DATE VALUE
1988-01-01 1620.538262190370
1988-02-01 1678.133863461910
1988-03-01 1824.084125374270
1988-04-01 1751.615972687860
1988-05-01 1652.170045964240
1988-06-01 1717.082023581610
1988-07-01 1736.617540272660
1988-08-01 1849.784376779850
1988-09-01 1882.840373522580
1988-10-01 1809.341306643040
1988-11-01 2053.976526330720
1988-12-01 1907.075858474590
1989-01-01 1954.030059155710
1989-02-01 1750.206229553470
1989-03-01 1906.690047298990
1989-04-01 1988.767490768920
1989-05-01 2066.213029554580
1989-06-01 2076.066593167590
1989-07-01 1981.021167468600
1989-08-01 2202.226338044080
1989-09-01 2273.510586020670
1989-10-01 2494.216818563620
1989-11-01 2652.119303042990
1989-12-01 2284.191130065350
1990-01-01 3126.401430604960
1990-02-01 2651.252624302620
1990-03-01 2487.900719624660
1990-04-01 2373.818111446180
1990-05-01 2376.806578708380
1990-06-01 2226.103882204100
1990-07-01 2303.253671734520
1990-08-01 2218.764281314730
1990-09-01 1976.982792380810
1990-10-01 1930.589207178970
1990-11-01 1756.619809502730
1990-12-01 1441.830619284480
1991-01-01 1659.546048365460
1991-02-01 1885.570127165050
1991-03-01 1793.175967823110
1991-04-01 2018.680918640530
1991-05-01 2254.739582480680
1991-06-01 2280.145833016630
1991-07-01 2488.643969572810
1991-08-01 1975.717357298970
1991-09-01 2119.235491987610
1991-10-01 2186.286453317870
1991-11-01 2207.738015188180
1991-12-01 2322.853695864590
1992-01-01 2506.415318232950
1992-02-01 2533.263342030420
1992-03-01 2596.601355230000
1992-04-01 2502.629598250430
1992-05-01 2354.368952836680
1992-06-01 2467.429732974980
1992-07-01 2506.841776552940
1992-08-01 2275.793599631690
1992-09-01 2547.561911433200
1992-10-01 2613.322066338970
1992-11-01 2438.067275843330
1992-12-01 2469.081574573780
1993-01-01 1972.834723213420
1993-02-01 2234.150643353770
1993-03-01 2434.837360194520
1993-04-01 2384.014541648790
1993-05-01 2297.165007237640
1993-06-01 2500.355643997570
1993-07-01 2589.554036173160
1993-08-01 2652.449028903610
1993-09-01 2814.320715880390
1993-10-01 2705.290424595100
1993-11-01 2986.397869315010
1993-12-01 2974.730285642040
1994-01-01 3113.341069136500
1994-02-01 2718.674467299710
1994-03-01 2889.798871826170
1994-04-01 2829.192227579780
1994-05-01 2777.017980193740
1994-06-01 2681.165957863470
1994-07-01 2653.379703853460
1994-08-01 2728.328781209450
1994-09-01 2637.064911453780
1994-10-01 2461.276258857990
1994-11-01 2362.093228848350
1994-12-01 2035.618070627050
1995-01-01 2251.726452686330
1995-02-01 2309.036470305460
1995-03-01 2149.995095370740
1995-04-01 1997.766142029720
1995-05-01 2313.702821387590
1995-06-01 2472.563251810000
1995-07-01 2114.646624823260
1995-08-01 2308.553027640720
1995-09-01 2028.382344342110
1995-10-01 2400.267463876620
1995-11-01 2559.902639619330
1995-12-01 2933.013201080970
1996-01-01 2633.393027300340
1996-02-01 2733.990281756180
1996-03-01 2630.739840370210
1996-04-01 2632.570930924280
1996-05-01 2564.023965698550
1996-06-01 2337.199607278320
1996-07-01 2537.753326923600
1996-08-01 2380.383684660530
1996-09-01 2256.946425386190
1996-10-01 2360.233997019640
1996-11-01 2272.110236074430
1996-12-01 2304.562269467730
1997-01-01 2283.729649789330
1997-02-01 2360.898191647280
1997-03-01 2113.589625027590
1997-04-01 2353.851103007070
1997-05-01 2450.917264025370
1997-06-01 2509.670664345180
1997-07-01 2574.640010334000
1997-08-01 2363.902558788940
1997-09-01 2732.822086496470
1997-10-01 2734.863370462220
1997-11-01 2566.211256195700
1997-12-01 2719.260124275230
1998-01-01 2531.355273361340
1998-02-01 2558.804532901570
1998-03-01 2672.150122700180
1998-04-01 2719.548645181880
1998-05-01 2526.580715697000
1998-06-01 2640.742684263200
1998-07-01 2566.927194747240
1998-08-01 2416.670102705750
1998-09-01 2546.905778588250
1998-10-01 2477.722471094740
1998-11-01 2456.036019881220
1998-12-01 2359.963599862240
1999-01-01 2444.724637644740
1999-02-01 2383.451922456740
1999-03-01 2510.333461710340
1999-04-01 2475.950131183280
1999-05-01 2437.230915647890
1999-06-01 2723.545814062720
1999-07-01 2434.077959390410
1999-08-01 2487.450733798310
1999-09-01 2434.193288868110
1999-10-01 2284.020436180190
1999-11-01 2438.346004841400
1999-12-01 2460.681535907310
2000-01-01 2173.181128586680
2000-02-01 2327.186892247640
2000-03-01 2264.842180291850
2000-04-01 2132.698013515570
2000-05-01 2391.817053305430
2000-06-01 2212.681167159810
2000-07-01 2019.547298517600
2000-08-01 2645.787580245170
2000-09-01 2247.146261945700
2000-10-01 2389.937664640640
2000-11-01 2354.769407326550
2000-12-01 2267.081942244090
2001-01-01 2497.143529985870
2001-02-01 2436.456971143320
2001-03-01 2512.015822484860
2001-04-01 2374.632247872210
2001-05-01 2338.899125195740
2001-06-01 2298.290312298760
2001-07-01 2238.502837795090
2001-08-01 2558.978573251280
2001-09-01 2207.612319445230
2001-10-01 2142.879486523300
2001-11-01 2133.959388187600
2001-12-01 2207.382879489640
2002-01-01 2369.786613381700
2002-02-01 2400.899708949800
2002-03-01 2252.799178878330
2002-04-01 2711.759609835210
2002-05-01 2688.441123770950
2002-06-01 2689.838741983390
2002-07-01 2840.522767546670
2002-08-01 2803.588779236050
2002-09-01 2661.873978463560
2002-10-01 3023.569218017260
2002-11-01 3109.290486231520
2002-12-01 2828.383267322250
2003-01-01 3062.948587011480
2003-02-01 2899.170349000950
2003-03-01 2715.367280264420
2003-04-01 3255.554871388140
2003-05-01 2567.410318764650
2003-06-01 2475.217141057210
2003-07-01 2846.288195988440
2003-08-01 2775.577677576540
2003-09-01 2858.621280283170
2003-10-01 2848.974691341670
2003-11-01 2677.848723484660
2003-12-01 2900.713119150610
2004-01-01 2652.492479123680
2004-02-01 2759.855322190840
2004-03-01 2869.054354864550
2004-04-01 2967.582520626630
2004-05-01 3183.857108037560
2004-06-01 3252.942288674300
2004-07-01 3040.561263924890
2004-08-01 2878.558969669700
2004-09-01 3244.077270339170
2004-10-01 3057.808497202670
2004-11-01 3311.016526480330
2004-12-01 3179.093141112700
2005-01-01 3412.878638691780
2005-02-01 3186.031756111920
2005-03-01 3476.080216576170
2005-04-01 3196.098919913090
2005-05-01 3116.241463308890
2005-06-01 3135.988546605510
2005-07-01 3063.055337426690
2005-08-01 3602.643099749870
2005-09-01 3490.357505145400
2005-10-01 3347.020305747840
2005-11-01 4061.259122329290
2005-12-01 3476.856540180000
2006-01-01 3049.851693251280
2006-02-01 3204.981000771980
2006-03-01 2988.405023709490
2006-04-01 2849.570670038730
2006-05-01 2821.372376204100
2006-06-01 2901.361046096930
2006-07-01 2371.549276454610
2006-08-01 3186.269338674900
2006-09-01 2572.173046875500
2006-10-01 2721.608281905260
2006-11-01 2532.809497886720
2006-12-01 2100.412203057880
2007-01-01 2839.129539233210
2007-02-01 2681.401773232870
2007-03-01 2899.205464271050
2007-04-01 2532.210599528090
2007-05-01 2714.415400401370
2007-06-01 2492.683726547230
2007-07-01 2375.224665805240
2007-08-01 2279.996411640410
2007-09-01 1987.249735266020
2007-10-01 2141.395869138850
2007-11-01 1860.276422151310
2007-12-01 1360.862692528600
2008-01-01 1739.085927487790
2008-02-01 1705.546650719200
2008-03-01 1505.441434119870
2008-04-01 1628.952945686350
2008-05-01 1518.403719055550
2008-06-01 1412.221550729550
2008-07-01 1455.616690028380
2008-08-01 1236.533956670060
2008-09-01 1402.179099649360
2008-10-01 1143.264136285670
2008-11-01 911.166240305912
2008-12-01 884.609541342262
2009-01-01 803.946124673421
2009-02-01 872.893458959619
2009-03-01 810.905122836927
2009-04-01 939.553401310056
2009-05-01 983.592508613872
2009-06-01 1075.818301106710
2009-07-01 1195.690007472440
2009-08-01 1229.345831994210
2009-09-01 1204.043168565540
2009-10-01 1214.514655442050
2009-11-01 1140.418174705930
2009-12-01 1303.832444190530
2010-01-01 1254.369228087970
2010-02-01 1361.876495828440
2010-03-01 1578.821567119270
2010-04-01 1278.375231438910
2010-05-01 981.207749883445
2010-06-01 1257.821327405340
2010-07-01 1081.170206239250
2010-08-01 1110.799529020740
2010-09-01 1120.502872440230
2010-10-01 1119.923718126320
2010-11-01 1170.814471838510
2010-12-01 1119.824816460520
2011-01-01 1369.421159185270
2011-02-01 1056.016453898170
2011-03-01 1141.335058678490
2011-04-01 1120.275964005410
2011-05-01 1030.809107859980
2011-06-01 1043.979004004870
2011-07-01 1046.049036714240
2011-08-01 1147.367312554120
2011-09-01 1148.662723377190
2011-10-01 998.124135074304
2011-11-01 1307.958959495050
2011-12-01 1007.938984685540
2012-01-01 1184.684160596100
2012-02-01 1246.183850144850
2012-03-01 1572.381720905030
2012-04-01 1223.264588486050
2012-05-01 1435.271342215800
2012-06-01 1340.255403668640
2012-07-01 1396.215849803720
2012-08-01 1564.841179149820
2012-09-01 1445.299240951530
2012-10-01 1648.994080911790
2012-11-01 1563.446114319050
2012-12-01 1583.165437950030
2013-01-01 1647.854912852370
2013-02-01 1567.591687852930
2013-03-01 1582.021565178710
2013-04-01 1637.609578529410
2013-05-01 1604.509158470610
2013-06-01 1564.127870668970
2013-07-01 1647.680099695860
2013-08-01 1456.955099172700
2013-09-01 1219.746139941450
2013-10-01 1541.159944303440
2013-11-01 1457.569615895990
2013-12-01 1400.901880616720
2014-01-01 1653.199666998190
2014-02-01 1305.929128356370
2014-03-01 1327.525038678860
2014-04-01 1401.027925144910
2014-05-01 1349.622024734070
2014-06-01 1443.644295803510
2014-07-01 1553.981816605340
2014-08-01 1392.992509938550
2014-09-01 1508.433558380810
2014-10-01 1409.041689472140
2014-11-01 1469.499831722230
2014-12-01 1755.533816653300
2015-01-01 1502.790737283970
2015-02-01 1535.277551531050
2015-03-01 1534.276879156990
2015-04-01 1585.390909095350
2015-05-01 1555.060644079500
2015-06-01 1586.025221080240
2015-07-01 1657.779920751140
2015-08-01 1617.780413595170
2015-09-01 1728.010223552590
2015-10-01 1760.613931016850
2015-11-01 1715.741148714040
2015-12-01 1812.584874211500
2016-01-01 1694.979541128040
2016-02-01 1872.509782474660
2016-03-01 1960.664680364500
2016-04-01 1858.526117550670
2016-05-01 1891.942780280370
2016-06-01 1922.209480911380
2016-07-01 1748.918250244390
2016-08-01 1778.313579303690
2016-09-01 1706.787305810790
2016-10-01 1688.746425221260
2016-11-01 1855.933854296240
2016-12-01 1822.515904748380
2017-01-01 1813.210297012940
2017-02-01 1891.864192718630
2017-03-01 1741.325758099960
2017-04-01 1773.208544823000
2017-05-01 2076.497511626850
2017-06-01 1916.424530681490
2017-07-01 1895.441166750090
2017-08-01 2061.573801839130
2017-09-01 1986.724296094840
2017-10-01 2012.211643751740
2017-11-01 1996.220328815650
2017-12-01 2031.196724727870
2018-01-01 2086.399124498230
2018-02-01 1967.842593466170
2018-03-01 2122.926354734690
2018-04-01 2000.367727313830
2018-05-01 1920.172794075070
2018-06-01 2008.255682308420
2018-07-01 1850.390040296930
2018-08-01 2111.686713410960
2018-09-01 1922.831761441260
2018-10-01 1999.509289258770
2018-11-01 1910.074804053560
2018-12-01 1679.694213417650
2019-01-01 1736.423184770990
2019-02-01 1604.299264715900
2019-03-01 1744.232743082960
2019-04-01 1906.906598416410
2019-05-01 1925.956591900640
2019-06-01 1849.169411720730
2019-07-01 2082.264631981210
2019-08-01 1995.168354706760
2019-09-01 1936.661679776770
2019-10-01 2056.729436641940
2019-11-01 2346.279818689670
2019-12-01 2144.237713655200
2020-01-01 2073.960361552090
2020-02-01 2010.483906006590
2020-03-01 1876.837845659790
2020-04-01 1050.855415644110
2020-05-01 1575.756941921730
2020-06-01 1915.947697565250
2020-07-01 2104.885322639150
2020-08-01 1960.903765367840
2020-09-01 2248.969644628460
2020-10-01 2305.088680072940
2020-11-01 2151.396433342610
2020-12-01 2357.745000427200
2021-01-01 2373.394568384200
2021-02-01 2405.361791434170
2021-03-01 2547.905723219100
2021-04-01 2150.627941438020
2021-05-01 1743.754087403360
2021-06-01 2007.278932244250
2021-07-01 1985.197794900390
2021-08-01 1982.865034976360
2021-09-01 2037.038731166400
2021-10-01 1948.949250301380
2021-11-01 2074.285035900710
2021-12-01 2166.771146279870
2022-01-01 2028.760432959470
2022-02-01 2129.928106590340
2022-03-01 2075.036391893770
2022-04-01 1820.345247987470
2022-05-01 1892.128838477290
2022-06-01 1796.421243425540
2022-07-01 1504.321337741560
2022-08-01 1715.982187033350
2022-09-01 1472.251065434330
2022-10-01 1250.101391838240
2022-11-01 1326.870008522530
2022-12-01 1153.061403615550
2023-01-01 1162.030492961430
2023-02-01 1216.543795152960
2023-03-01 1320.860234376240
2023-04-01 1364.801357943770
2023-05-01 1544.643788204340
2023-06-01 1640.501216389120
2023-07-01 1527.775594219960
2023-08-01 1598.339074531130
2023-09-01 1556.782457944540
2023-10-01 1617.876060592340
2023-11-01 1671.124120028950
2023-12-01 1647.163880779760
2024-01-01 1914.559036687800
2024-02-01 1659.978603045500
2024-03-01 1604.303506644150
2024-04-01 1631.173726962600
2024-05-01 1484.185047860240
2024-06-01 1246.368705965880
2024-07-01 1513.995353286450
2024-08-01 1589.014967517560
2024-09-01 1622.540000041100
2024-10-01 1669.629337441070
2024-11-01 1502.600088092930
2024-12-01 1524.952969958960
2025-01-01 1521.463252714900
2025-02-01 1482.381070095440
2025-03-01 1465.121651389950
2025-04-01 1601.563231903510
2025-05-01 1479.151957647340
2025-06-01 1354.884741349090
2025-07-01 1585.508598383600
2025-08-01 1328.750609330960
2025-09-01 1373.824090337100
2025-10-01 1425.076960273710
2025-11-01 1425.415206501130
2025-12-01 1726.619716968740
2026-01-01 1514.766685242520
2026-02-01 1283.749585776940
2026-03-01 1448.458601831280
2026-04-01 1383.487038864430
2026-05-01 1416.914228652300
2026-06-01 1525.170757810820
2026-07-01 1521.815080957670

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