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 2026-04-01
Last Updated 2026-06-01 10:59 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 1620.538262189870
1988-02-01 1678.133863460720
1988-03-01 1824.084125373670
1988-04-01 1751.615972687280
1988-05-01 1652.170045965490
1988-06-01 1717.082023581360
1988-07-01 1736.617540272830
1988-08-01 1849.784376779540
1988-09-01 1882.840373523980
1988-10-01 1809.341306644520
1988-11-01 2053.976526332360
1988-12-01 1907.075858473140
1989-01-01 1954.030059154620
1989-02-01 1750.206229551400
1989-03-01 1906.690047297090
1989-04-01 1988.767490767040
1989-05-01 2066.213029555770
1989-06-01 2076.066593167080
1989-07-01 1981.021167469350
1989-08-01 2202.226338046750
1989-09-01 2273.510586024390
1989-10-01 2494.216818568010
1989-11-01 2652.119303046310
1989-12-01 2284.191130062900
1990-01-01 3126.401430598020
1990-02-01 2651.252624293650
1990-03-01 2487.900719616110
1990-04-01 2373.818111439960
1990-05-01 2376.806578709060
1990-06-01 2226.103882205920
1990-07-01 2303.253671741220
1990-08-01 2218.764281327280
1990-09-01 1976.982792392440
1990-10-01 1930.589207186910
1990-11-01 1756.619809504230
1990-12-01 1441.830619276530
1991-01-01 1659.546048371600
1991-02-01 1885.570127071750
1991-03-01 1793.175967811810
1991-04-01 2018.680918644750
1991-05-01 2254.739582506750
1991-06-01 2280.145833053590
1991-07-01 2488.643969620440
1991-08-01 1975.717357333710
1991-09-01 2119.235491997610
1991-10-01 2186.286453296670
1991-11-01 2207.738015142520
1991-12-01 2322.853695756300
1992-01-01 2506.415318219050
1992-02-01 2533.263341786410
1992-03-01 2596.601355241440
1992-04-01 2502.629598323850
1992-05-01 2354.368952951400
1992-06-01 2467.429733143430
1992-07-01 2506.841776645860
1992-08-01 2275.793599666110
1992-09-01 2547.561911366710
1992-10-01 2613.322066194970
1992-11-01 2438.067275692580
1992-12-01 2469.081574249540
1993-01-01 1972.834723178130
1993-02-01 2234.150643065400
1993-03-01 2434.837360232270
1993-04-01 2384.014541699110
1993-05-01 2297.165007256910
1993-06-01 2500.355645388750
1993-07-01 2589.554036009330
1993-08-01 2652.449028730540
1993-09-01 2814.320715550590
1993-10-01 2705.290424161580
1993-11-01 2986.397868794640
1993-12-01 2974.730284614820
1994-01-01 3113.341068381030
1994-02-01 2718.674466274570
1994-03-01 2889.798873993840
1994-04-01 2829.192227275250
1994-05-01 2777.017980086590
1994-06-01 2681.165960927830
1994-07-01 2653.379703707890
1994-08-01 2728.328779610810
1994-09-01 2637.064910994340
1994-10-01 2461.276258198100
1994-11-01 2362.093228126210
1994-12-01 2035.618069466230
1995-01-01 2251.726451611710
1995-02-01 2309.036468878150
1995-03-01 2149.995098633180
1995-04-01 1997.766141712050
1995-05-01 2313.702821364920
1995-06-01 2472.563256210660
1995-07-01 2114.646624703300
1995-08-01 2308.553024877920
1995-09-01 2028.382343632300
1995-10-01 2400.267462799720
1995-11-01 2559.902638679950
1995-12-01 2933.013199060860
1996-01-01 2633.393025457050
1996-02-01 2733.990279584110
1996-03-01 2630.739845867550
1996-04-01 2632.570928974630
1996-05-01 2564.023963582510
1996-06-01 2337.199622249690
1996-07-01 2537.753323863960
1996-08-01 2380.383677898630
1996-09-01 2256.946422335250
1996-10-01 2360.233993858910
1996-11-01 2272.110233738700
1996-12-01 2304.562267205360
1997-01-01 2283.729652733020
1997-02-01 2360.898190941060
1997-03-01 2113.589631015790
1997-04-01 2353.851102962380
1997-05-01 2450.917253552030
1997-06-01 2509.670695399840
1997-07-01 2574.640004296870
1997-08-01 2363.902544300780
1997-09-01 2732.822082736620
1997-10-01 2734.863365940650
1997-11-01 2566.211251369580
1997-12-01 2719.260117783270
1998-01-01 2531.355276506500
1998-02-01 2558.804529022050
1998-03-01 2672.150130573250
1998-04-01 2719.548649393150
1998-05-01 2526.580702089350
1998-06-01 2640.742740293430
1998-07-01 2566.927196010130
1998-08-01 2416.670067555880
1998-09-01 2546.905779312750
1998-10-01 2477.722464543730
1998-11-01 2456.036006584050
1998-12-01 2359.963578311230
1999-01-01 2444.724620472090
1999-02-01 2383.451896623100
1999-03-01 2510.333509534670
1999-04-01 2475.950133704770
1999-05-01 2437.230904035150
1999-06-01 2723.545890445830
1999-07-01 2434.077974638610
1999-08-01 2487.450678713590
1999-09-01 2434.193306844890
1999-10-01 2284.020423338990
1999-11-01 2438.345982468040
1999-12-01 2460.681491145840
2000-01-01 2173.181080847240
2000-02-01 2327.186832930300
2000-03-01 2264.842234657820
2000-04-01 2132.697962578030
2000-05-01 2391.816977688360
2000-06-01 2212.681528987880
2000-07-01 2019.547249835440
2000-08-01 2645.787439987400
2000-09-01 2247.146263077370
2000-10-01 2389.937634879840
2000-11-01 2354.769376743650
2000-12-01 2267.081893278570
2001-01-01 2497.143459158990
2001-02-01 2436.456887111020
2001-03-01 2512.015904690370
2001-04-01 2374.632134279050
2001-05-01 2338.898977923510
2001-06-01 2298.290963388030
2001-07-01 2238.502686037850
2001-08-01 2558.978353600320
2001-09-01 2207.612302002200
2001-10-01 2142.879466171310
2001-11-01 2133.959392518190
2001-12-01 2207.382872455270
2002-01-01 2369.786573833270
2002-02-01 2400.899640857450
2002-03-01 2252.799248460930
2002-04-01 2711.759438040920
2002-05-01 2688.440872523550
2002-06-01 2689.839777384560
2002-07-01 2840.522370200150
2002-08-01 2803.588299443110
2002-09-01 2661.873715289930
2002-10-01 3023.568955999530
2002-11-01 3109.291761269370
2002-12-01 2828.383247997900
2003-01-01 3062.948700831470
2003-02-01 2899.170556130430
2003-03-01 2715.367638889290
2003-04-01 3255.554760687230
2003-05-01 2567.409869185150
2003-06-01 2475.217594111530
2003-07-01 2846.286898127030
2003-08-01 2775.575967554170
2003-09-01 2858.620911575250
2003-10-01 2848.974859766930
2003-11-01 2677.851782772980
2003-12-01 2900.714587886520
2004-01-01 2652.493728410180
2004-02-01 2759.856539038550
2004-03-01 2869.055259357260
2004-04-01 2967.582204927250
2004-05-01 3183.855139053340
2004-06-01 3252.940593973410
2004-07-01 3040.557307747070
2004-08-01 2878.554956069050
2004-09-01 3244.076766771830
2004-10-01 3057.810471473520
2004-11-01 3311.025102144180
2004-12-01 3179.097671965080
2005-01-01 3412.884374026990
2005-02-01 3186.036278664080
2005-03-01 3476.083533931060
2005-04-01 3196.099174112020
2005-05-01 3116.237739919290
2005-06-01 3135.982450167160
2005-07-01 3063.043876755660
2005-08-01 3602.632388328730
2005-09-01 3490.338245789530
2005-10-01 3347.044315613580
2005-11-01 4061.285458636360
2005-12-01 3476.869311097190
2006-01-01 3049.861417122510
2006-02-01 3204.987889789450
2006-03-01 2988.408622241300
2006-04-01 2849.569522271420
2006-05-01 2821.366009014400
2006-06-01 2901.350075396660
2006-07-01 2371.534123000680
2006-08-01 3186.255051407770
2006-09-01 2572.144733300330
2006-10-01 2721.645996351070
2006-11-01 2532.841509396690
2006-12-01 2100.424343711550
2007-01-01 2839.142710700010
2007-02-01 2681.408985612560
2007-03-01 2899.209066263640
2007-04-01 2532.207844683120
2007-05-01 2714.406446536980
2007-06-01 2492.670003351010
2007-07-01 2375.203892669500
2007-08-01 2279.983302028510
2007-09-01 1987.217300395190
2007-10-01 2141.440336655600
2007-11-01 1860.310340418040
2007-12-01 1360.873571208180
2008-01-01 1739.095530983470
2008-02-01 1705.551116486250
2008-03-01 1505.442347097620
2008-04-01 1628.949304308890
2008-05-01 1518.397195378320
2008-06-01 1412.212395739590
2008-07-01 1455.603101088290
2008-08-01 1236.526688965170
2008-09-01 1402.156038017100
2008-10-01 1143.288687907700
2008-11-01 911.185483837397
2008-12-01 884.617933219496
2009-01-01 803.950393474229
2009-02-01 872.895374631303
2009-03-01 810.905148291870
2009-04-01 939.550837897999
2009-05-01 983.588150022603
2009-06-01 1075.811403114570
2009-07-01 1195.679297573720
2009-08-01 1229.339258366490
2009-09-01 1204.023409623840
2009-10-01 1214.540795180200
2009-11-01 1140.441686233870
2009-12-01 1303.845824508590
2010-01-01 1254.374235682690
2010-02-01 1361.877993909510
2010-03-01 1578.820153391240
2010-04-01 1278.371130657770
2010-05-01 981.203714922049
2010-06-01 1257.814577988070
2010-07-01 1081.162961944370
2010-08-01 1110.795204595470
2010-09-01 1120.490253298650
2010-10-01 1119.940167192160
2010-11-01 1170.834563397590
2010-12-01 1119.835184027980
2011-01-01 1369.424221972720
2011-02-01 1056.016625681580
2011-03-01 1141.333551722270
2011-04-01 1120.272718023590
2011-05-01 1030.805823286530
2011-06-01 1043.975075030570
2011-07-01 1046.044873246580
2011-08-01 1147.364492170970
2011-09-01 1148.656006863140
2011-10-01 998.131951444872
2011-11-01 1307.973547476360
2011-12-01 1007.946418352570
2012-01-01 1184.685404456540
2012-02-01 1246.183427182260
2012-03-01 1572.379597945880
2012-04-01 1223.261778717520
2012-05-01 1435.268171442570
2012-06-01 1340.252464668730
2012-07-01 1396.213820631350
2012-08-01 1564.839203412710
2012-09-01 1445.298424588710
2012-10-01 1648.995730038980
2012-11-01 1563.454258188550
2012-12-01 1583.173421140040
2013-01-01 1647.858095161080
2013-02-01 1567.590713090640
2013-03-01 1582.019914102150
2013-04-01 1637.607297312590
2013-05-01 1604.507061817060
2013-06-01 1564.126063975860
2013-07-01 1647.679396726300
2013-08-01 1456.954194642260
2013-09-01 1219.745773263980
2013-10-01 1541.160748728200
2013-11-01 1457.572108550660
2013-12-01 1400.905901302500
2014-01-01 1653.204973797670
2014-02-01 1305.927790406060
2014-03-01 1327.523582532050
2014-04-01 1401.026342039350
2014-05-01 1349.620221729040
2014-06-01 1443.643193794160
2014-07-01 1553.981623399880
2014-08-01 1392.992266083280
2014-09-01 1508.433943678090
2014-10-01 1409.043117876570
2014-11-01 1469.502264253270
2014-12-01 1755.537164483780
2015-01-01 1502.798270932980
2015-02-01 1535.274775953060
2015-03-01 1534.273060602470
2015-04-01 1585.386826130380
2015-05-01 1555.055955202890
2015-06-01 1586.022491100810
2015-07-01 1657.779121436030
2015-08-01 1617.781698226560
2015-09-01 1728.014837075080
2015-10-01 1760.620444985370
2015-11-01 1715.752306987160
2015-12-01 1812.596665399440
2016-01-01 1694.997136860070
2016-02-01 1872.474972232180
2016-03-01 1960.659350842790
2016-04-01 1858.516929855860
2016-05-01 1891.930434574240
2016-06-01 1922.201883853010
2016-07-01 1748.916216642610
2016-08-01 1778.317812919080
2016-09-01 1706.797314204460
2016-10-01 1688.762323275890
2016-11-01 1855.964555899770
2016-12-01 1822.549619892230
2017-01-01 1813.251673657510
2017-02-01 1891.814470720640
2017-03-01 1741.336485123820
2017-04-01 1773.104225384030
2017-05-01 2076.450775183250
2017-06-01 1916.426170730830
2017-07-01 1895.455032344610
2017-08-01 2061.602665271590
2017-09-01 1986.769715271450
2017-10-01 2012.266153687030
2017-11-01 1996.287547481340
2017-12-01 2031.265164081730
2018-01-01 2086.463273554310
2018-02-01 1967.761630223850
2018-03-01 2122.909975402250
2018-04-01 2000.125541825960
2018-05-01 1920.049294453850
2018-06-01 2008.275148718090
2018-07-01 1850.444658178750
2018-08-01 2111.786080862620
2018-09-01 1922.954133515040
2018-10-01 1999.632350671330
2018-11-01 1910.181846624170
2018-12-01 1679.762637426440
2019-01-01 1736.458750492430
2019-02-01 1604.197978324860
2019-03-01 1744.159596656880
2019-04-01 1906.518635691540
2019-05-01 1925.696441530260
2019-06-01 1849.135026840330
2019-07-01 2082.452964727340
2019-08-01 1995.437388608060
2019-09-01 1936.649392381200
2019-10-01 2057.607867659580
2019-11-01 2346.207914500850
2019-12-01 2144.159184163920
2020-01-01 2073.832884241140
2020-02-01 2010.195663734000
2020-03-01 1876.579895175760
2020-04-01 1050.559850363030
2020-05-01 1575.388944115820
2020-06-01 1916.190779131440
2020-07-01 2105.160758338570
2020-08-01 1961.351334755010
2020-09-01 2248.851250826440
2020-10-01 2307.055810780380
2020-11-01 2151.274225258040
2020-12-01 2357.580257874150
2021-01-01 2372.419419923330
2021-02-01 2404.749537081400
2021-03-01 2547.101408900390
2021-04-01 2149.608068572780
2021-05-01 1743.091884621230
2021-06-01 2008.258664730470
2021-07-01 1985.683039751560
2021-08-01 1983.754092411730
2021-09-01 2037.094761725970
2021-10-01 1951.642790399690
2021-11-01 2074.145266183340
2021-12-01 2166.387162390350
2022-01-01 2026.898668596480
2022-02-01 2128.775544097290
2022-03-01 2073.708203949770
2022-04-01 1818.041246747910
2022-05-01 1891.308697653130
2022-06-01 1798.268085184270
2022-07-01 1505.642130116270
2022-08-01 1717.502691157410
2022-09-01 1472.939114343670
2022-10-01 1252.257545030260
2022-11-01 1326.891511470230
2022-12-01 1152.813103896530
2023-01-01 1159.933183382100
2023-02-01 1215.937371493000
2023-03-01 1318.598884426660
2023-04-01 1360.590785388490
2023-05-01 1543.422543030650
2023-06-01 1644.088696541330
2023-07-01 1531.658725237170
2023-08-01 1601.017196970230
2023-09-01 1558.784874890080
2023-10-01 1621.498882487980
2023-11-01 1671.421651846810
2023-12-01 1647.195247640880
2024-01-01 1910.375297041500
2024-02-01 1659.084302410630
2024-03-01 1598.659630918280
2024-04-01 1620.656014068600
2024-05-01 1481.251850395920
2024-06-01 1250.607905552140
2024-07-01 1522.055626642610
2024-08-01 1593.587311385790
2024-09-01 1626.809800747350
2024-10-01 1674.047975300150
2024-11-01 1503.520392677790
2024-12-01 1525.936021707990
2025-01-01 1517.987596273260
2025-02-01 1482.142848906490
2025-03-01 1457.231198463250
2025-04-01 1585.938874051250
2025-05-01 1472.390364054180
2025-06-01 1360.029179602230
2025-07-01 1599.248086475430
2025-08-01 1334.484657180670
2025-09-01 1379.577605044290
2025-10-01 1429.670453402050
2025-11-01 1427.049227807240
2025-12-01 1728.740724355070
2026-01-01 1511.727950675840
2026-02-01 1283.435167492840
2026-03-01 1438.280231584530
2026-04-01 1365.664783993600

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