Table Data - New Private Housing Units Authorized by Building Permits: 1-Unit Structures for Washington-Arlington-Alexandria, DC-VA-MD-WV (MSA)

Title New Private Housing Units Authorized by Building Permits: 1-Unit Structures for Washington-Arlington-Alexandria, DC-VA-MD-WV (MSA)
Series ID WASH911BP1FHSA
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 2026-01-01
Last Updated 2026-03-24 12:10 PM 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 1705.842931654980
1988-02-01 2396.232729423520
1988-03-01 2455.961075658340
1988-04-01 2414.189459631760
1988-05-01 2243.923487496910
1988-06-01 2248.665797767510
1988-07-01 2502.845575795670
1988-08-01 2893.813498235140
1988-09-01 2624.565533873290
1988-10-01 2304.375443220670
1988-11-01 2594.571910175830
1988-12-01 2597.240772571500
1989-01-01 2159.501099601110
1989-02-01 2010.516352302000
1989-03-01 1666.701699964970
1989-04-01 2060.990094292910
1989-05-01 1761.201632186440
1989-06-01 1829.818002065350
1989-07-01 1831.553739978880
1989-08-01 1671.657116735980
1989-09-01 2103.909896379590
1989-10-01 1557.884257853470
1989-11-01 2159.407820814590
1989-12-01 1624.546310498920
1990-01-01 1853.424101778360
1990-02-01 1772.462764262470
1990-03-01 1585.977827049870
1990-04-01 1383.330210641240
1990-05-01 1435.971793805500
1990-06-01 1369.427581986040
1990-07-01 1087.877956791870
1990-08-01 1380.515917893100
1990-09-01 1085.132345366200
1990-10-01 1227.253100731560
1990-11-01 977.536551704233
1990-12-01 1022.450677122950
1991-01-01 902.491750900438
1991-02-01 754.388238009573
1991-03-01 1194.140424746500
1991-04-01 1152.176876099600
1991-05-01 1459.697392668150
1991-06-01 1298.842300655360
1991-07-01 1384.877208277630
1991-08-01 1209.423178936980
1991-09-01 1259.114404416210
1991-10-01 1346.146501112180
1991-11-01 1410.904517646720
1991-12-01 1419.925317704530
1992-01-01 1745.141835918870
1992-02-01 1612.602911326840
1992-03-01 1725.603989947850
1992-04-01 1773.736574713430
1992-05-01 1790.659142824230
1992-06-01 1674.524783594100
1992-07-01 1745.124973074600
1992-08-01 1500.329279150640
1992-09-01 1806.625188124630
1992-10-01 1887.244744538680
1992-11-01 1698.793293735340
1992-12-01 1927.747400317330
1993-01-01 2157.885130055810
1993-02-01 2062.577248031110
1993-03-01 1968.931382495640
1993-04-01 2410.757753266080
1993-05-01 1949.519326840980
1993-06-01 2085.015706597580
1993-07-01 2329.334289283300
1993-08-01 2119.799610003960
1993-09-01 2197.533561846440
1993-10-01 2226.371458297410
1993-11-01 2476.342447083760
1993-12-01 2238.934604169520
1994-01-01 2065.787969077100
1994-02-01 2238.397387004040
1994-03-01 2168.812229136140
1994-04-01 2114.450789896680
1994-05-01 2320.039911947280
1994-06-01 2482.490835061300
1994-07-01 2042.279810878340
1994-08-01 2432.683467771610
1994-09-01 2432.824631401590
1994-10-01 1931.471937734670
1994-11-01 2022.293975842860
1994-12-01 2201.483232504880
1995-01-01 1803.258487482790
1995-02-01 1628.919598609730
1995-03-01 2349.288891543700
1995-04-01 1709.044199789800
1995-05-01 1671.832278220100
1995-06-01 1729.669258492950
1995-07-01 1812.647121845830
1995-08-01 2531.398289783170
1995-09-01 1793.174340369330
1995-10-01 2248.048768718800
1995-11-01 2043.830969861890
1995-12-01 1766.742497471660
1996-01-01 1662.444142497760
1996-02-01 1990.175390923320
1996-03-01 1930.100006604900
1996-04-01 1916.492121546740
1996-05-01 2380.026051598320
1996-06-01 1858.632661199840
1996-07-01 1903.723709807180
1996-08-01 2053.548896897700
1996-09-01 1865.432759974430
1996-10-01 1914.167337184250
1996-11-01 1920.829579627980
1996-12-01 1662.760906490990
1997-01-01 2278.659548573660
1997-02-01 1913.892022562930
1997-03-01 1757.521365705230
1997-04-01 1974.876909778150
1997-05-01 2069.539660496940
1997-06-01 1853.896313887530
1997-07-01 1975.095886451260
1997-08-01 1745.986331492240
1997-09-01 1991.891292207910
1997-10-01 1988.517302425040
1997-11-01 1841.654486614240
1997-12-01 2095.177060940090
1998-01-01 2156.112963750530
1998-02-01 1974.567498956790
1998-03-01 2196.724510594240
1998-04-01 2131.190054129430
1998-05-01 2154.961369284170
1998-06-01 2365.130966200260
1998-07-01 2344.686372181440
1998-08-01 2295.905938431920
1998-09-01 3262.469913983580
1998-10-01 2250.174503815520
1998-11-01 2330.557367855430
1998-12-01 2570.784530500890
1999-01-01 2100.421094086870
1999-02-01 2368.363697407980
1999-03-01 2439.477441106330
1999-04-01 2545.256971093760
1999-05-01 2328.833991340250
1999-06-01 2277.761491231340
1999-07-01 2599.068386217160
1999-08-01 2340.673542949790
1999-09-01 2269.698466833790
1999-10-01 2163.783976840140
1999-11-01 2297.063647882900
1999-12-01 2314.054688297760
2000-01-01 2459.553009873560
2000-02-01 2487.720167343150
2000-03-01 2917.600127896250
2000-04-01 2121.960531241240
2000-05-01 2446.055717446440
2000-06-01 2501.758631328090
2000-07-01 2240.951579874830
2000-08-01 2443.754514790620
2000-09-01 1910.775274148620
2000-10-01 2477.718774405400
2000-11-01 3218.765840720460
2000-12-01 2626.288241822120
2001-01-01 2533.680123401420
2001-02-01 2573.967970589880
2001-03-01 2381.239025866280
2001-04-01 2154.353563223200
2001-05-01 2290.419533819080
2001-06-01 2346.906833982810
2001-07-01 2203.076977846590
2001-08-01 2333.749988940650
2001-09-01 2223.860531240920
2001-10-01 2495.785668377930
2001-11-01 2594.872227861570
2001-12-01 2026.371532403400
2002-01-01 2561.524273688050
2002-02-01 2730.270298773670
2002-03-01 2106.701570113220
2002-04-01 2379.881214513860
2002-05-01 2268.153054109220
2002-06-01 2298.483516147370
2002-07-01 2630.904170577650
2002-08-01 2650.740671754850
2002-09-01 2711.233084817620
2002-10-01 2843.796417498340
2002-11-01 2522.208912768590
2002-12-01 2308.851847227270
2003-01-01 2497.687637379530
2003-02-01 2191.754499547760
2003-03-01 2488.917382158100
2003-04-01 2520.978328594540
2003-05-01 2740.819674768330
2003-06-01 3163.793377714020
2003-07-01 2539.905302443730
2003-08-01 2462.139479428390
2003-09-01 2509.996154870970
2003-10-01 2469.246149243610
2003-11-01 2171.322340676950
2003-12-01 2623.641775679240
2004-01-01 2411.063841822260
2004-02-01 1840.642123556640
2004-03-01 2353.021554672140
2004-04-01 2387.701738006840
2004-05-01 1988.077154645580
2004-06-01 1885.571749635830
2004-07-01 2138.209193239820
2004-08-01 2287.909618140750
2004-09-01 2947.900030154920
2004-10-01 2015.031484408700
2004-11-01 2099.270304644940
2004-12-01 2478.152088462830
2005-01-01 1994.408882266160
2005-02-01 1995.988782973820
2005-03-01 2300.858283057190
2005-04-01 2137.230076465440
2005-05-01 2356.348364384850
2005-06-01 2572.774886060440
2005-07-01 1970.070639603880
2005-08-01 1806.235231576180
2005-09-01 1884.029830602630
2005-10-01 1966.936173274490
2005-11-01 1991.694797955000
2005-12-01 1668.569527826580
2006-01-01 1962.844428574920
2006-02-01 1901.805821321890
2006-03-01 1662.990447662660
2006-04-01 1525.741714176860
2006-05-01 1611.174849290230
2006-06-01 1474.459610085050
2006-07-01 1266.587608637240
2006-08-01 1436.196569172030
2006-09-01 1439.138527573770
2006-10-01 1334.261255597960
2006-11-01 1461.500801883960
2006-12-01 1223.633861052770
2007-01-01 1293.076138783770
2007-02-01 1595.690615541300
2007-03-01 1417.792464450700
2007-04-01 1127.580045713650
2007-05-01 1513.537717485380
2007-06-01 1268.527195360380
2007-07-01 1298.764632100470
2007-08-01 1170.399948424210
2007-09-01 949.724050411918
2007-10-01 967.298383000858
2007-11-01 974.608659681147
2007-12-01 908.045782746839
2008-01-01 924.617783576103
2008-02-01 825.784123823971
2008-03-01 733.853778591398
2008-04-01 779.590837057140
2008-05-01 646.821395263608
2008-06-01 771.737703532670
2008-07-01 780.606173167208
2008-08-01 765.212269757253
2008-09-01 740.733432258781
2008-10-01 1161.406719294460
2008-11-01 609.161283155989
2008-12-01 678.985542701092
2009-01-01 611.410607669657
2009-02-01 658.096840720644
2009-03-01 672.759793278121
2009-04-01 741.004620242328
2009-05-01 608.915386087954
2009-06-01 763.395401278849
2009-07-01 839.745554366848
2009-08-01 675.936730799407
2009-09-01 861.621808187298
2009-10-01 874.425252405014
2009-11-01 798.894948637893
2009-12-01 930.472538380380
2010-01-01 824.513720859656
2010-02-01 535.141193771429
2010-03-01 912.926584845254
2010-04-01 911.510737286724
2010-05-01 743.002656882908
2010-06-01 727.851324488863
2010-07-01 721.647706493778
2010-08-01 801.768226105769
2010-09-01 789.297142114382
2010-10-01 624.970139398906
2010-11-01 792.361990798422
2010-12-01 655.573265913970
2011-01-01 749.951692780497
2011-02-01 745.124326922102
2011-03-01 755.824261209548
2011-04-01 687.590887738357
2011-05-01 812.108484639590
2011-06-01 781.232313386818
2011-07-01 793.919445254778
2011-08-01 849.096279206048
2011-09-01 786.490854999051
2011-10-01 818.556178957915
2011-11-01 740.259561522618
2011-12-01 933.590008080217
2012-01-01 893.689136055278
2012-02-01 1083.675361695640
2012-03-01 713.244253076494
2012-04-01 704.632202497275
2012-05-01 1066.451624686370
2012-06-01 926.252526449114
2012-07-01 878.795866952815
2012-08-01 1018.605812056760
2012-09-01 970.684154728920
2012-10-01 967.356295329991
2012-11-01 1074.824951863670
2012-12-01 1085.879400609360
2013-01-01 1102.320435716990
2013-02-01 1326.236165363560
2013-03-01 1265.180497122230
2013-04-01 1330.128783884700
2013-05-01 1267.754683870740
2013-06-01 933.460054215083
2013-07-01 1308.046930367280
2013-08-01 1061.923161188240
2013-09-01 1091.132976838250
2013-10-01 1294.029448906160
2013-11-01 1190.510316388920
2013-12-01 1006.268529706510
2014-01-01 1069.773737702420
2014-02-01 1069.769141145900
2014-03-01 1052.686666266810
2014-04-01 1074.995188389070
2014-05-01 1153.219454804150
2014-06-01 1036.449885969820
2014-07-01 1059.433852859150
2014-08-01 1152.338440167710
2014-09-01 1152.203935109250
2014-10-01 1065.670737884920
2014-11-01 1066.486622500670
2014-12-01 949.415810852202
2015-01-01 1021.729855416220
2015-02-01 806.169703852132
2015-03-01 940.183866171029
2015-04-01 1030.560064795930
2015-05-01 948.546652148815
2015-06-01 1165.779869771810
2015-07-01 1137.816938757850
2015-08-01 1023.388171601080
2015-09-01 1003.351989855510
2015-10-01 1192.527594583290
2015-11-01 971.373338962739
2015-12-01 1201.800219789140
2016-01-01 1122.592794986600
2016-02-01 1000.124706175050
2016-03-01 1107.129086373030
2016-04-01 1017.932375646380
2016-05-01 1048.475414651570
2016-06-01 1053.292594685300
2016-07-01 974.015737063241
2016-08-01 1275.502584736830
2016-09-01 1078.416841076970
2016-10-01 939.603522812046
2016-11-01 1117.187088235860
2016-12-01 1299.832953147940
2017-01-01 1057.901694978300
2017-02-01 1241.823850801190
2017-03-01 1294.586706891740
2017-04-01 1082.430329126260
2017-05-01 1337.397357750150
2017-06-01 1185.106365258160
2017-07-01 1141.915952041660
2017-08-01 1287.915068938270
2017-09-01 1389.939466400580
2017-10-01 1148.990995617180
2017-11-01 1290.060961023440
2017-12-01 953.466330928606
2018-01-01 1240.195053553410
2018-02-01 1144.329826460070
2018-03-01 1124.737264510700
2018-04-01 1220.276493409000
2018-05-01 1121.818212829050
2018-06-01 1131.372032070170
2018-07-01 1198.002611993710
2018-08-01 1101.611501349160
2018-09-01 855.795852370906
2018-10-01 1268.941969699690
2018-11-01 1033.296758442780
2018-12-01 1094.688796386000
2019-01-01 1017.596957104270
2019-02-01 1051.661883239020
2019-03-01 1021.494948033230
2019-04-01 1200.497073158110
2019-05-01 1057.763630039210
2019-06-01 1063.445669339620
2019-07-01 1098.023268289490
2019-08-01 1068.585082881140
2019-09-01 963.705396991858
2019-10-01 1000.713895979900
2019-11-01 1051.087274670800
2019-12-01 927.920297093038
2020-01-01 1080.466333857790
2020-02-01 1167.415282423880
2020-03-01 814.704215442862
2020-04-01 862.831744875292
2020-05-01 805.701477434196
2020-06-01 981.419560200530
2020-07-01 1095.120403485830
2020-08-01 1049.836786300380
2020-09-01 1251.476126465890
2020-10-01 1343.597892526210
2020-11-01 1228.931596320210
2020-12-01 1296.838186776770
2021-01-01 1345.093528370150
2021-02-01 1120.069327995500
2021-03-01 1224.737372390290
2021-04-01 1063.812037792300
2021-05-01 1085.294632726530
2021-06-01 1085.948836638090
2021-07-01 968.645615273555
2021-08-01 1025.479933957000
2021-09-01 1075.276569730540
2021-10-01 989.075234449600
2021-11-01 1042.795198104410
2021-12-01 1152.725645203180
2022-01-01 1007.906552005780
2022-02-01 1153.045512221790
2022-03-01 1268.167880326480
2022-04-01 992.425269216822
2022-05-01 1058.900586166350
2022-06-01 983.062301670464
2022-07-01 740.937291323984
2022-08-01 869.792330323394
2022-09-01 874.723585208694
2022-10-01 859.329610261224
2022-11-01 898.908913818939
2022-12-01 747.871663757924
2023-01-01 702.896684145803
2023-02-01 826.222224376400
2023-03-01 840.868301503289
2023-04-01 904.292877929529
2023-05-01 1115.529602525990
2023-06-01 880.460773876073
2023-07-01 668.137233725470
2023-08-01 950.755719653202
2023-09-01 828.524158123444
2023-10-01 848.096878347355
2023-11-01 827.048745699778
2023-12-01 852.474500386435
2024-01-01 998.212865954168
2024-02-01 1037.229925218510
2024-03-01 975.944695053255
2024-04-01 1056.161425753350
2024-05-01 913.750539492032
2024-06-01 820.265403688016
2024-07-01 948.773363473145
2024-08-01 916.929958978167
2024-09-01 742.894302107993
2024-10-01 1018.781511258210
2024-11-01 1021.381790513230
2024-12-01 963.755037183268
2025-01-01 1206.457995843520
2025-02-01 880.672918343036
2025-03-01 785.828959559214
2025-04-01 765.063613677329
2025-05-01 875.765986425265
2025-06-01 938.088946741724
2025-07-01 907.564246630072
2025-08-01 776.571820012661
2025-09-01 787.728991830724
2025-10-01 688.725149344885
2025-11-01 648.560123212449
2025-12-01 966.433795666317
2026-01-01 712.563222097510

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