Table Data - New Private Housing Units Authorized by Building Permits: 1-Unit Structures for Seattle-Tacoma-Bellevue, WA (MSA)

Title New Private Housing Units Authorized by Building Permits: 1-Unit Structures for Seattle-Tacoma-Bellevue, WA (MSA)
Series ID SEAT653BP1FHSA
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 2026-05-01
Last Updated 2026-06-24 8:44 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
1988-01-01 981.977765260231
1988-02-01 1047.440670030540
1988-03-01 1087.568670685700
1988-04-01 1059.979746574660
1988-05-01 1092.819297164120
1988-06-01 971.463401301161
1988-07-01 1048.879349918780
1988-08-01 1156.813278389900
1988-09-01 1133.951063985970
1988-10-01 1150.812503214970
1988-11-01 1322.508803101960
1988-12-01 1262.650788521330
1989-01-01 1123.731526101600
1989-02-01 1084.363089989420
1989-03-01 1168.280097491640
1989-04-01 1175.878900614220
1989-05-01 1254.549674387040
1989-06-01 1239.603108061470
1989-07-01 1240.574223008390
1989-08-01 1307.882954521920
1989-09-01 1324.057620481690
1989-10-01 1475.289708832050
1989-11-01 1611.067267468630
1989-12-01 1430.194737610820
1990-01-01 1551.144265474050
1990-02-01 1533.093371328550
1990-03-01 1317.523844555670
1990-04-01 1295.041531117320
1990-05-01 1166.095366518880
1990-06-01 1101.716150435190
1990-07-01 1050.403328045610
1990-08-01 1093.412981346870
1990-09-01 903.418310403877
1990-10-01 794.114610170904
1990-11-01 728.223203189223
1990-12-01 681.748847168501
1991-01-01 728.531020546485
1991-02-01 690.632634714773
1991-03-01 788.171021202533
1991-04-01 788.024136546964
1991-05-01 972.080230909338
1991-06-01 923.895510830298
1991-07-01 939.511174420450
1991-08-01 786.403804020432
1991-09-01 858.758095442214
1991-10-01 941.055144837113
1991-11-01 871.776465252436
1991-12-01 990.294179665148
1992-01-01 1042.279149067260
1992-02-01 1110.197347968920
1992-03-01 1057.816111135820
1992-04-01 1048.311901273280
1992-05-01 994.306112537958
1992-06-01 1058.677046201510
1992-07-01 1003.651898638720
1992-08-01 934.041494156344
1992-09-01 1072.482166766860
1992-10-01 984.853678376332
1992-11-01 1005.643683835490
1992-12-01 1180.513079032390
1993-01-01 922.875815368169
1993-02-01 923.516122158153
1993-03-01 915.816032597489
1993-04-01 1100.723263817420
1993-05-01 1022.729736714930
1993-06-01 1032.358134285370
1993-07-01 1117.955761868880
1993-08-01 1195.607405546850
1993-09-01 1174.338581442440
1993-10-01 1186.159293903010
1993-11-01 1259.403464047930
1993-12-01 1356.695210825360
1994-01-01 1301.181949707290
1994-02-01 1209.635465526970
1994-03-01 1256.043646425690
1994-04-01 1218.185295999490
1994-05-01 1165.556924967580
1994-06-01 1142.157136633110
1994-07-01 1157.457985777870
1994-08-01 1146.874686500770
1994-09-01 1156.965599874900
1994-10-01 1142.203608170530
1994-11-01 1038.131858803950
1994-12-01 996.210317164325
1995-01-01 983.294660657314
1995-02-01 1010.515066074180
1995-03-01 994.353252966579
1995-04-01 952.034827807933
1995-05-01 1045.314909512680
1995-06-01 1228.091997508020
1995-07-01 978.768369860127
1995-08-01 1050.974565256230
1995-09-01 925.816590881893
1995-10-01 1019.681677064620
1995-11-01 1166.047093422720
1995-12-01 1063.129809752700
1996-01-01 1092.645762496920
1996-02-01 1149.255088992720
1996-03-01 1123.107804369200
1996-04-01 1254.905403327740
1996-05-01 1119.045016435250
1996-06-01 1024.228371756230
1996-07-01 1064.997439798230
1996-08-01 1044.737020052060
1996-09-01 1018.771382048890
1996-10-01 1031.380646206350
1996-11-01 1092.214148598750
1996-12-01 1090.995565981850
1997-01-01 1232.241258422330
1997-02-01 1092.282869115180
1997-03-01 998.975286317569
1997-04-01 1118.360672585600
1997-05-01 1144.403860814210
1997-06-01 1154.157757499200
1997-07-01 1207.953760295160
1997-08-01 1150.456897179420
1997-09-01 1228.129066623390
1997-10-01 1257.606891007770
1997-11-01 1283.206323943720
1997-12-01 1269.562696422710
1998-01-01 1174.865871760100
1998-02-01 1224.718776380980
1998-03-01 1206.884815282000
1998-04-01 1243.569567969700
1998-05-01 1203.765243471420
1998-06-01 1282.888483928910
1998-07-01 1274.488554474310
1998-08-01 1149.088295121670
1998-09-01 1216.964023540690
1998-10-01 1233.559410052710
1998-11-01 1139.061342383710
1998-12-01 1154.653251585790
1999-01-01 1116.267250070040
1999-02-01 1078.721546872060
1999-03-01 1236.144571325360
1999-04-01 1217.574403892980
1999-05-01 1225.687315294510
1999-06-01 1199.017195635840
1999-07-01 1158.160762305540
1999-08-01 1216.769891924750
1999-09-01 1191.692899283940
1999-10-01 1130.859220288300
1999-11-01 1169.470833212240
1999-12-01 1178.929072574480
2000-01-01 1075.424633216170
2000-02-01 1107.775662428900
2000-03-01 1062.795315300630
2000-04-01 995.107690060790
2000-05-01 995.229030006886
2000-06-01 1013.685674643890
2000-07-01 967.844945243202
2000-08-01 1283.110007585370
2000-09-01 1060.085635494710
2000-10-01 1110.725091372090
2000-11-01 1073.982156871500
2000-12-01 1011.962598784740
2001-01-01 1174.726436081500
2001-02-01 1110.880468496900
2001-03-01 1218.527578380270
2001-04-01 1065.805787110080
2001-05-01 1067.620352711030
2001-06-01 1018.399099898990
2001-07-01 1006.687161302440
2001-08-01 1116.049127795710
2001-09-01 963.433309772666
2001-10-01 894.424377148104
2001-11-01 887.057785291268
2001-12-01 958.191888040390
2002-01-01 1107.864437614730
2002-02-01 1087.702963354410
2002-03-01 1058.950158008050
2002-04-01 1137.856738825670
2002-05-01 1164.532335026490
2002-06-01 1257.064968691250
2002-07-01 1274.819773106140
2002-08-01 1200.862608667720
2002-09-01 1119.221809114360
2002-10-01 1404.038713946440
2002-11-01 1486.476984704760
2002-12-01 1208.006865977370
2003-01-01 1276.733097028620
2003-02-01 1284.420199000770
2003-03-01 1146.683196464640
2003-04-01 1242.897144450070
2003-05-01 1234.773522624850
2003-06-01 1118.466953768290
2003-07-01 1354.591498820070
2003-08-01 1256.566820989850
2003-09-01 1341.791979493630
2003-10-01 1277.090494188940
2003-11-01 1253.425571805080
2003-12-01 1368.114492118070
2004-01-01 1235.813052800380
2004-02-01 1202.949577077870
2004-03-01 1257.937786453660
2004-04-01 1351.898608250120
2004-05-01 1271.667936573820
2004-06-01 1584.728853929610
2004-07-01 1242.419208646660
2004-08-01 1144.212272237340
2004-09-01 1315.503740640490
2004-10-01 1232.202835059560
2004-11-01 1384.401574970660
2004-12-01 1375.021738650780
2005-01-01 1422.584713814170
2005-02-01 1164.689067103610
2005-03-01 1416.068455971230
2005-04-01 1436.532405200010
2005-05-01 1423.100257674960
2005-06-01 1549.270634835590
2005-07-01 1422.221699891710
2005-08-01 1584.507459573410
2005-09-01 1523.401834170310
2005-10-01 1494.168585219990
2005-11-01 1649.306119621680
2005-12-01 1587.166199282560
2006-01-01 1348.742194474090
2006-02-01 1438.526556503700
2006-03-01 1390.784117453560
2006-04-01 1183.103954541760
2006-05-01 1266.118773541930
2006-06-01 1237.015382758690
2006-07-01 1161.822274615920
2006-08-01 1298.861972358380
2006-09-01 1131.800758585490
2006-10-01 1225.024647042630
2006-11-01 1000.555539246860
2006-12-01 957.056697201212
2007-01-01 1185.342428916350
2007-02-01 1228.111321467640
2007-03-01 1207.608652731500
2007-04-01 1113.630328772600
2007-05-01 1192.830919145530
2007-06-01 1065.656438517350
2007-07-01 960.738739684605
2007-08-01 983.822599232390
2007-09-01 790.764968438007
2007-10-01 857.671245750966
2007-11-01 813.262120647250
2007-12-01 685.531795846468
2008-01-01 715.564555054289
2008-02-01 645.829928807958
2008-03-01 630.840508838269
2008-04-01 661.467712703473
2008-05-01 572.154414916650
2008-06-01 500.027377887261
2008-07-01 545.672467360407
2008-08-01 467.340586936614
2008-09-01 460.835032635347
2008-10-01 422.346356081463
2008-11-01 304.879263279690
2008-12-01 337.538631657666
2009-01-01 337.565241417767
2009-02-01 314.081429702488
2009-03-01 292.366509255720
2009-04-01 348.278581241305
2009-05-01 355.154295308498
2009-06-01 407.102434551201
2009-07-01 454.933172772735
2009-08-01 406.343811005216
2009-09-01 494.485713413216
2009-10-01 477.415346605572
2009-11-01 462.759949155776
2009-12-01 568.642473477135
2010-01-01 535.898028576642
2010-02-01 557.793947762451
2010-03-01 569.866404560156
2010-04-01 516.022005710719
2010-05-01 441.966798379962
2010-06-01 525.634903855305
2010-07-01 435.997194004913
2010-08-01 413.033332132692
2010-09-01 442.028866619935
2010-10-01 449.948924656237
2010-11-01 513.962476223801
2010-12-01 510.669340111877
2011-01-01 629.517798396676
2011-02-01 467.205058593822
2011-03-01 488.115962961404
2011-04-01 479.722281923763
2011-05-01 472.770851850391
2011-06-01 473.412357330001
2011-07-01 474.681077743176
2011-08-01 575.844754945885
2011-09-01 504.120102481076
2011-10-01 453.547807012214
2011-11-01 526.817414079742
2011-12-01 474.223178705425
2012-01-01 470.448114068329
2012-02-01 572.216372967713
2012-03-01 659.507631287502
2012-04-01 596.901839064947
2012-05-01 700.369249368611
2012-06-01 630.229463601141
2012-07-01 645.760984181065
2012-08-01 806.397951448991
2012-09-01 724.179319237849
2012-10-01 855.436262389014
2012-11-01 675.116215238344
2012-12-01 750.630225472702
2013-01-01 729.614857772080
2013-02-01 727.392134162989
2013-03-01 703.910047517516
2013-04-01 794.541192121412
2013-05-01 778.529648078434
2013-06-01 760.204402356234
2013-07-01 778.499404181421
2013-08-01 677.465304842071
2013-09-01 547.019095986387
2013-10-01 724.659017378781
2013-11-01 764.615354825016
2013-12-01 691.869981357080
2014-01-01 758.234747597268
2014-02-01 739.899256010535
2014-03-01 603.255418920692
2014-04-01 698.081257874609
2014-05-01 673.506949973134
2014-06-01 711.613410871096
2014-07-01 777.611383291301
2014-08-01 657.768505837837
2014-09-01 729.401586862112
2014-10-01 707.640749207613
2014-11-01 699.000054761504
2014-12-01 832.002768261323
2015-01-01 674.097267502108
2015-02-01 679.666060791730
2015-03-01 655.857262736184
2015-04-01 692.838122933106
2015-05-01 691.134234569186
2015-06-01 686.744980278840
2015-07-01 724.665902902457
2015-08-01 763.716420514115
2015-09-01 753.160598480248
2015-10-01 759.323395663307
2015-11-01 763.043962802501
2015-12-01 808.295460440802
2016-01-01 793.409043844874
2016-02-01 810.266662949030
2016-03-01 881.812395406007
2016-04-01 782.529503114022
2016-05-01 837.237957477122
2016-06-01 831.911592153363
2016-07-01 752.474064191790
2016-08-01 752.206258115908
2016-09-01 728.699462107366
2016-10-01 604.642912759418
2016-11-01 747.792215311202
2016-12-01 755.049616704124
2017-01-01 783.047492125867
2017-02-01 885.699961924672
2017-03-01 636.695368376819
2017-04-01 775.502997495064
2017-05-01 913.991114746177
2017-06-01 848.996539522146
2017-07-01 827.175879928559
2017-08-01 858.434602182176
2017-09-01 850.204958861403
2017-10-01 835.428361819189
2017-11-01 844.556254689727
2017-12-01 855.276933132580
2018-01-01 862.976611095690
2018-02-01 816.390162421512
2018-03-01 801.809295821198
2018-04-01 777.320680073981
2018-05-01 724.710530638514
2018-06-01 724.056947740121
2018-07-01 713.183137549677
2018-08-01 774.554270639136
2018-09-01 673.899536350252
2018-10-01 791.780153259130
2018-11-01 860.547509347046
2018-12-01 625.611281568873
2019-01-01 612.783473959523
2019-02-01 594.571262491312
2019-03-01 649.034708446766
2019-04-01 743.239266569676
2019-05-01 764.509323666623
2019-06-01 779.088476837024
2019-07-01 788.798577022208
2019-08-01 711.911277627866
2019-09-01 750.623630487717
2019-10-01 788.805354903814
2019-11-01 770.338336459414
2019-12-01 853.037766367935
2020-01-01 725.582695110415
2020-02-01 759.722508233637
2020-03-01 692.476220227943
2020-04-01 403.638600169825
2020-05-01 631.638958737390
2020-06-01 691.216854055418
2020-07-01 853.778409248657
2020-08-01 729.991278425418
2020-09-01 839.918184717283
2020-10-01 731.504085045268
2020-11-01 753.743284519142
2020-12-01 753.492022603906
2021-01-01 881.223645896945
2021-02-01 962.515807019286
2021-03-01 852.225896557097
2021-04-01 708.340281163887
2021-05-01 579.730235269154
2021-06-01 637.315754113012
2021-07-01 671.717966199223
2021-08-01 708.783152437073
2021-09-01 703.582818219023
2021-10-01 679.002478986855
2021-11-01 694.134822984660
2021-12-01 735.730724390637
2022-01-01 650.886718347138
2022-02-01 689.063817817598
2022-03-01 640.763831042381
2022-04-01 595.544471522221
2022-05-01 713.802439002633
2022-06-01 630.914209292599
2022-07-01 555.305321852916
2022-08-01 562.739549510212
2022-09-01 485.370660737980
2022-10-01 435.797130609038
2022-11-01 439.362074067163
2022-12-01 392.798773183501
2023-01-01 370.026589690288
2023-02-01 378.474506890317
2023-03-01 461.259872779452
2023-04-01 448.760513231597
2023-05-01 560.968681951368
2023-06-01 587.760760872884
2023-07-01 487.276861855340
2023-08-01 486.911419147591
2023-09-01 537.419348894415
2023-10-01 594.197628350666
2023-11-01 611.029048861987
2023-12-01 584.934796476931
2024-01-01 592.548488224876
2024-02-01 563.706140144329
2024-03-01 496.348333136844
2024-04-01 522.886559397949
2024-05-01 489.978940326299
2024-06-01 467.892481531723
2024-07-01 530.155818026933
2024-08-01 558.572177309921
2024-09-01 549.687862940982
2024-10-01 562.783985872247
2024-11-01 471.527722216447
2024-12-01 426.353450716872
2025-01-01 526.224393127508
2025-02-01 550.513956517214
2025-03-01 484.724497910859
2025-04-01 560.404096936527
2025-05-01 473.022676376426
2025-06-01 441.580653339866
2025-07-01 585.610099705782
2025-08-01 464.972795566870
2025-09-01 438.698540786894
2025-10-01 447.240710512332
2025-11-01 504.857063672294
2025-12-01 590.074547548810
2026-01-01 528.476603213428
2026-02-01 471.489149325709
2026-03-01 539.428320037230
2026-04-01 524.391662173777
2026-05-01 511.559272145555

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