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 2026-08-01
Last Updated 2026-09-24 8:48 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 1620.538262191460
1988-02-01 1678.133863464530
1988-03-01 1824.084125375600
1988-04-01 1751.615972689140
1988-05-01 1652.170045961510
1988-06-01 1717.082023582160
1988-07-01 1736.617540272280
1988-08-01 1849.784376780530
1988-09-01 1882.840373519500
1988-10-01 1809.341306639770
1988-11-01 2053.976526327110
1988-12-01 1907.075858477790
1989-01-01 1954.030059158090
1989-02-01 1750.206229558030
1989-03-01 1906.690047303160
1989-04-01 1988.767490773040
1989-05-01 2066.213029551970
1989-06-01 2076.066593168730
1989-07-01 1981.021167466940
1989-08-01 2202.226338038230
1989-09-01 2273.510586012500
1989-10-01 2494.216818553960
1989-11-01 2652.119303035710
1989-12-01 2284.191130070740
1990-01-01 3126.401430620210
1990-02-01 2651.252624322330
1990-03-01 2487.900719643450
1990-04-01 2373.818111459860
1990-05-01 2376.806578706900
1990-06-01 2226.103882200110
1990-07-01 2303.253671719810
1990-08-01 2218.764281287170
1990-09-01 1976.982792355250
1990-10-01 1930.589207161510
1990-11-01 1756.619809499420
1990-12-01 1441.830619301960
1991-01-01 1659.546048351970
1991-02-01 1885.570127370100
1991-03-01 1793.175967847940
1991-04-01 2018.680918631270
1991-05-01 2254.739582423390
1991-06-01 2280.145832935400
1991-07-01 2488.643969468130
1991-08-01 1975.717357222630
1991-09-01 2119.235491965640
1991-10-01 2186.286453364460
1991-11-01 2207.738015288540
1991-12-01 2322.853696102580
1992-01-01 2506.415318263520
1992-02-01 2533.263342566670
1992-03-01 2596.601355204870
1992-04-01 2502.629598089090
1992-05-01 2354.368952584580
1992-06-01 2467.429732604780
1992-07-01 2506.841776348730
1992-08-01 2275.793599556050
1992-09-01 2547.561911579280
1992-10-01 2613.322066655410
1992-11-01 2438.067276174590
1992-12-01 2469.081575286340
1993-01-01 1972.834723290960
1993-02-01 2234.150643987540
1993-03-01 2434.837360111600
1993-04-01 2384.014541538240
1993-05-01 2297.165007195310
1993-06-01 2500.355640940220
1993-07-01 2589.554036533200
1993-08-01 2652.449029283910
1993-09-01 2814.320716605100
1993-10-01 2705.290425547740
1993-11-01 2986.397870458540
1993-12-01 2974.730287899500
1994-01-01 3113.341070796780
1994-02-01 2718.674469552630
1994-03-01 2889.798867062820
1994-04-01 2829.192228249050
1994-05-01 2777.017980429180
1994-06-01 2681.165951128980
1994-07-01 2653.379704173320
1994-08-01 2728.328784722490
1994-09-01 2637.064912463400
1994-10-01 2461.276260308100
1994-11-01 2362.093230435250
1994-12-01 2035.618073178060
1995-01-01 2251.726455047970
1995-02-01 2309.036473442290
1995-03-01 2149.995088201770
1995-04-01 1997.766142727930
1995-05-01 2313.702821437420
1995-06-01 2472.563242138710
1995-07-01 2114.646625086740
1995-08-01 2308.553033711880
1995-09-01 2028.382345901820
1995-10-01 2400.267466242970
1995-11-01 2559.902641683320
1995-12-01 2933.013205520110
1996-01-01 2633.393031351240
1996-02-01 2733.990286530150
1996-03-01 2630.739828291250
1996-04-01 2632.570935210390
1996-05-01 2564.023970350120
1996-06-01 2337.199574374280
1996-07-01 2537.753333647800
1996-08-01 2380.383699519810
1996-09-01 2256.946432089920
1996-10-01 2360.234003964200
1996-11-01 2272.110241205810
1996-12-01 2304.562274438530
1997-01-01 2283.729643318840
1997-02-01 2360.898193201290
1997-03-01 2113.589611871580
1997-04-01 2353.851103108950
1997-05-01 2450.917287051090
1997-06-01 2509.670596093870
1997-07-01 2574.640023598850
1997-08-01 2363.902590623860
1997-09-01 2732.822094757850
1997-10-01 2734.863380395510
1997-11-01 2566.211266796460
1997-12-01 2719.260138535280
1998-01-01 2531.355266438900
1998-02-01 2558.804541425180
1998-03-01 2672.150105404020
1998-04-01 2719.548635938440
1998-05-01 2526.580745628450
1998-06-01 2640.742561135390
1998-07-01 2566.927191978940
1998-08-01 2416.670179931330
1998-09-01 2546.905776997130
1998-10-01 2477.722485481520
1998-11-01 2456.036049084550
1998-12-01 2359.963647193740
1999-01-01 2444.724675334850
1999-02-01 2383.451979193710
1999-03-01 2510.333356678950
1999-04-01 2475.950125647820
1999-05-01 2437.230941213730
1999-06-01 2723.545646233640
1999-07-01 2434.077925908150
1999-08-01 2487.450854822040
1999-09-01 2434.193249347660
1999-10-01 2284.020464384700
1999-11-01 2438.346053980610
1999-12-01 2460.681634213680
2000-01-01 2173.181233408420
2000-02-01 2327.187022518450
2000-03-01 2264.842060899790
2000-04-01 2132.698125379850
2000-05-01 2391.817219447640
2000-06-01 2212.680372460400
2000-07-01 2019.547405453580
2000-08-01 2645.787888350010
2000-09-01 2247.146259386560
2000-10-01 2389.937729999610
2000-11-01 2354.769474486250
2000-12-01 2267.082049768410
2001-01-01 2497.143685491940
2001-02-01 2436.457155674430
2001-03-01 2512.015641943990
2001-04-01 2374.632497324030
2001-05-01 2338.899448725090
2001-06-01 2298.288882379640
2001-07-01 2238.503171156720
2001-08-01 2558.979055757420
2001-09-01 2207.612357649480
2001-10-01 2142.879531195600
2001-11-01 2133.959378624200
2001-12-01 2207.382894869110
2002-01-01 2369.786700155540
2002-02-01 2400.899858430990
2002-03-01 2252.799026023280
2002-04-01 2711.759987062560
2002-05-01 2688.441675680210
2002-06-01 2689.836468181670
2002-07-01 2840.523640494550
2002-08-01 2803.589833368890
2002-09-01 2661.874556641000
2002-10-01 3023.569793677070
2002-11-01 3109.287684376360
2002-12-01 2828.383309122960
2003-01-01 3062.948335977770
2003-02-01 2899.169892879160
2003-03-01 2715.366491852670
2003-04-01 3255.555114835790
2003-05-01 2567.411307794000
2003-06-01 2475.216148345120
2003-07-01 2846.291048870120
2003-08-01 2775.581435530530
2003-09-01 2858.622089038520
2003-10-01 2848.974318832970
2003-11-01 2677.841998786240
2003-12-01 2900.709888894240
2004-01-01 2652.489731462600
2004-02-01 2759.852646486980
2004-03-01 2869.052367076880
2004-04-01 2967.583216640160
2004-05-01 3183.861440693390
2004-06-01 3252.946021449490
2004-07-01 3040.569961328550
2004-08-01 2878.567789770930
2004-09-01 3244.078371204340
2004-10-01 3057.804149583640
2004-11-01 3310.997672549020
2004-12-01 3179.083179066680
2005-01-01 3412.866028886970
2005-02-01 3186.021814350190
2005-03-01 3476.072924511940
2005-04-01 3196.098366459580
2005-05-01 3116.249658013990
2005-06-01 3136.001959266420
2005-07-01 3063.080537873000
2005-08-01 3602.666668908110
2005-09-01 3490.399846992070
2005-10-01 3346.967390021370
2005-11-01 4061.201266951130
2005-12-01 3476.828502267400
2006-01-01 3049.830344004740
2006-02-01 3204.965891172370
2006-03-01 2988.397121745590
2006-04-01 2849.573217564780
2006-05-01 2821.386385477690
2006-06-01 2901.385149043890
2006-07-01 2371.582556355970
2006-08-01 3186.300731784090
2006-09-01 2572.235274039310
2006-10-01 2721.525164632610
2006-11-01 2532.739252812900
2006-12-01 2100.385613374730
2007-01-01 2839.100715310590
2007-02-01 2681.386042485160
2007-03-01 2899.197563082350
2007-04-01 2532.216695775740
2007-05-01 2714.435078550670
2007-06-01 2492.713799795650
2007-07-01 2375.270190732780
2007-08-01 2280.025127269910
2007-09-01 1987.320985393970
2007-10-01 2141.297887095190
2007-11-01 1860.202077943510
2007-12-01 1360.838936987410
2008-01-01 1739.065206797720
2008-02-01 1705.536999062090
2008-03-01 1505.439439865140
2008-04-01 1628.960962102690
2008-05-01 1518.418022201770
2008-06-01 1412.241534511770
2008-07-01 1455.646343736610
2008-08-01 1236.549756781820
2008-09-01 1402.229610278120
2008-10-01 1143.209982750670
2008-11-01 911.124051777156
2008-12-01 884.592114622366
2009-01-01 803.936804294030
2009-02-01 872.889076607998
2009-03-01 810.905083244151
2009-04-01 939.558836422979
2009-05-01 983.601958648448
2009-06-01 1075.833377026640
2009-07-01 1195.713483038990
2009-08-01 1229.360217409710
2009-09-01 1204.086436722810
2009-10-01 1214.456939656870
2009-11-01 1140.366513085860
2009-12-01 1303.805699623260
2010-01-01 1254.357889898680
2010-02-01 1361.872361874470
2010-03-01 1578.824694160360
2010-04-01 1278.383839713330
2010-05-01 981.216611304694
2010-06-01 1257.836375310480
2010-07-01 1081.185961576590
2010-08-01 1110.808333663220
2010-09-01 1120.530907082440
2010-10-01 1119.886230458960
2010-11-01 1170.769632392570
2010-12-01 1119.805553360820
2011-01-01 1369.418511844010
2011-02-01 1056.015269801440
2011-03-01 1141.338450053580
2011-04-01 1120.281706774960
2011-05-01 1030.814546232410
2011-06-01 1043.985144784670
2011-07-01 1046.066248704850
2011-08-01 1147.368578467580
2011-09-01 1148.675495608190
2011-10-01 998.104164056300
2011-11-01 1307.927072132840
2011-12-01 1007.923881067530
2012-01-01 1184.692798366260
2012-02-01 1246.187415472480
2012-03-01 1572.388698525490
2012-04-01 1223.268659562210
2012-05-01 1435.273227239930
2012-06-01 1340.255317031240
2012-07-01 1396.241288064130
2012-08-01 1564.830828126020
2012-09-01 1445.292719374540
2012-10-01 1648.975161997060
2012-11-01 1563.415945478440
2012-12-01 1583.127276275080
2013-01-01 1647.974613054430
2013-02-01 1567.581321682060
2013-03-01 1582.011756607320
2013-04-01 1637.597507073380
2013-05-01 1604.495652585130
2013-06-01 1564.114813282050
2013-07-01 1647.720376647540
2013-08-01 1456.949688468210
2013-09-01 1219.751059495500
2013-10-01 1541.156942674410
2013-11-01 1457.553196466640
2013-12-01 1400.847695695500
2014-01-01 1653.393857934990
2014-02-01 1305.878332582190
2014-03-01 1327.475199385840
2014-04-01 1400.984488677620
2014-05-01 1349.606766565130
2014-06-01 1443.633325069050
2014-07-01 1554.037931970970
2014-08-01 1393.028800184710
2014-09-01 1508.494879085020
2014-10-01 1409.084276813910
2014-11-01 1469.495933472860
2014-12-01 1755.418918869050
2015-01-01 1502.977965789370
2015-02-01 1535.104569241560
2015-03-01 1534.114957112170
2015-04-01 1585.277244979060
2015-05-01 1555.038668965260
2015-06-01 1586.026103010370
2015-07-01 1657.863948003430
2015-08-01 1617.970003369660
2015-09-01 1728.208657549110
2015-10-01 1760.702908519890
2015-11-01 1715.920393538020
2015-12-01 1812.695821161510
2016-01-01 1695.459945132710
2016-02-01 1870.290469125860
2016-03-01 1960.735562442870
2016-04-01 1858.607010379150
2016-05-01 1892.085469114850
2016-06-01 1922.306506117130
2016-07-01 1749.067079199290
2016-08-01 1778.679791073800
2016-09-01 1707.071419490080
2016-10-01 1688.832294693890
2016-11-01 1856.350799868490
2016-12-01 1822.804542573990
2017-01-01 1813.941699893910
2017-02-01 1887.584302175050
2017-03-01 1741.591193935160
2017-04-01 1773.567850974550
2017-05-01 2076.932876539340
2017-06-01 1916.609286447340
2017-07-01 1895.662460606140
2017-08-01 2062.158058821140
2017-09-01 1987.130794468170
2017-10-01 2012.291309902360
2017-11-01 1996.905152306350
2017-12-01 2031.738031749460
2018-01-01 2087.386713291410
2018-02-01 1961.402350440880
2018-03-01 2123.656496971570
2018-04-01 2001.105039306650
2018-05-01 1920.885158748810
2018-06-01 2008.522708310090
2018-07-01 1850.650720319940
2018-08-01 2112.305285634420
2018-09-01 1923.206104501830
2018-10-01 1999.577973117780
2018-11-01 1910.784250971380
2018-12-01 1680.098363701100
2019-01-01 1737.059725140650
2019-02-01 1599.092143069690
2019-03-01 1744.879491974430
2019-04-01 1907.698600851670
2019-05-01 1926.835406490170
2019-06-01 1849.425944619720
2019-07-01 2081.988950372810
2019-08-01 1995.911780271810
2019-09-01 1936.857027641880
2019-10-01 2057.239221823100
2019-11-01 2346.958014387340
2019-12-01 2144.721499462440
2020-01-01 2074.719307877570
2020-02-01 2004.328314228610
2020-03-01 1877.872795388470
2020-04-01 1051.367580693980
2020-05-01 1576.499732709550
2020-06-01 1915.888513807540
2020-07-01 2103.832435161820
2020-08-01 1961.511129286170
2020-09-01 2248.827966752100
2020-10-01 2306.275217390890
2020-11-01 2151.850564877920
2020-12-01 2358.224365778740
2021-01-01 2374.600878068280
2021-02-01 2400.976453256860
2021-03-01 2549.257200546570
2021-04-01 2151.319899635630
2021-05-01 1744.082586119090
2021-06-01 2006.068290640260
2021-07-01 1983.078158063600
2021-08-01 1983.267498589550
2021-09-01 2036.841852235170
2021-10-01 1951.001461870240
2021-11-01 2075.076294256990
2021-12-01 2167.706714071970
2022-01-01 2030.671345021630
2022-02-01 2129.117742171140
2022-03-01 2076.274330609040
2022-04-01 1820.519564679720
2022-05-01 1892.285729306200
2022-06-01 1795.204873503560
2022-07-01 1495.738010350230
2022-08-01 1717.617102973600
2022-09-01 1473.622325696680
2022-10-01 1252.942621074250
2022-11-01 1328.713738840420
2022-12-01 1154.203206719640
2023-01-01 1164.530452604270
2023-02-01 1218.211687783260
2023-03-01 1321.834587817370
2023-04-01 1364.249553821180
2023-05-01 1543.050035691760
2023-06-01 1635.961320730250
2023-07-01 1506.974028570830
2023-08-01 1608.658558557510
2023-09-01 1560.178725753660
2023-10-01 1623.668268079680
2023-11-01 1677.828492800480
2023-12-01 1649.263762004080
2024-01-01 1921.841791863120
2024-02-01 1663.821056612770
2024-03-01 1605.238554525880
2024-04-01 1629.603641433270
2024-05-01 1480.289949615460
2024-06-01 1239.712225293540
2024-07-01 1481.047398814860
2024-08-01 1610.197612859650
2024-09-01 1628.582630048860
2024-10-01 1677.443684649070
2024-11-01 1513.313069990950
2024-12-01 1526.985918208240
2025-01-01 1529.845807147000
2025-02-01 1487.077587167070
2025-03-01 1465.396068288900
2025-04-01 1598.853207587320
2025-05-01 1471.950666674600
2025-06-01 1342.700705128090
2025-07-01 1541.887493979320
2025-08-01 1357.407256521910
2025-09-01 1380.158679336820
2025-10-01 1432.418005290520
2025-11-01 1439.844279421460
2025-12-01 1728.359322455740
2026-01-01 1524.651481384960
2026-02-01 1288.386015649930
2026-03-01 1447.587571575680
2026-04-01 1380.180495647120
2026-05-01 1407.806418733870
2026-06-01 1508.426062525920
2026-07-01 1473.174054145970
2026-08-01 1353.892724652910

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