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 2026-08-01
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 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 2278.659548573670
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 2095.177060940100
1998-01-01 2156.112963750530
1998-02-01 1974.567498956800
1998-03-01 2196.724510594250
1998-04-01 2131.190054129430
1998-05-01 2154.961369284160
1998-06-01 2365.130966200250
1998-07-01 2344.686372181430
1998-08-01 2295.905938431910
1998-09-01 3262.469913983570
1998-10-01 2250.174503815520
1998-11-01 2330.557367855440
1998-12-01 2570.784530500910
1999-01-01 2100.421094086890
1999-02-01 2368.363697408020
1999-03-01 2439.477441106290
1999-04-01 2545.256971093720
1999-05-01 2328.833991340200
1999-06-01 2277.761491231330
1999-07-01 2599.068386217210
1999-08-01 2340.673542949900
1999-09-01 2269.698466833920
1999-10-01 2163.783976840240
1999-11-01 2297.063647882900
1999-12-01 2314.054688297560
2000-01-01 2459.553009873100
2000-02-01 2487.720167342800
2000-03-01 2917.600127895860
2000-04-01 2121.960531241280
2000-05-01 2446.055717446840
2000-06-01 2501.758631328220
2000-07-01 2240.951579875490
2000-08-01 2443.754514791310
2000-09-01 1910.775274148930
2000-10-01 2477.718774405330
2000-11-01 3218.765840719790
2000-12-01 2626.288241820910
2001-01-01 2533.680123399910
2001-02-01 2573.967970588980
2001-03-01 2381.239025866360
2001-04-01 2154.353563224440
2001-05-01 2290.419533820590
2001-06-01 2346.906833982520
2001-07-01 2203.076977845840
2001-08-01 2333.749988937950
2001-09-01 2223.860531238100
2001-10-01 2495.785668378770
2001-11-01 2594.872227868510
2001-12-01 2026.371532408860
2002-01-01 2561.524273694410
2002-02-01 2730.270298776070
2002-03-01 2106.701570109550
2002-04-01 2379.881214505360
2002-05-01 2268.153054096240
2002-06-01 2298.483516160000
2002-07-01 2630.904170565110
2002-08-01 2650.740671742720
2002-09-01 2711.233084809250
2002-10-01 2843.796417506380
2002-11-01 2522.208912797040
2002-12-01 2308.851847255250
2003-01-01 2497.687637410520
2003-02-01 2191.754499558620
2003-03-01 2488.917382141300
2003-04-01 2520.978328555340
2003-05-01 2740.819674713310
2003-06-01 3163.793377742490
2003-07-01 2539.905302434150
2003-08-01 2462.139479426270
2003-09-01 2509.996154859700
2003-10-01 2469.246149252870
2003-11-01 2171.322340687910
2003-12-01 2623.641775675500
2004-01-01 2411.063841820510
2004-02-01 1840.642123838870
2004-03-01 2353.021554712280
2004-04-01 2387.701737387490
2004-05-01 1988.077154707350
2004-06-01 1885.571749759590
2004-07-01 2138.209193316580
2004-08-01 2287.909618174180
2004-09-01 2947.900030127440
2004-10-01 2015.031484374980
2004-11-01 2099.270304571220
2004-12-01 2478.152088367300
2005-01-01 1994.408882211360
2005-02-01 1995.988783565210
2005-03-01 2300.858283186110
2005-04-01 2137.230075423470
2005-05-01 2356.348364545350
2005-06-01 2572.774886278770
2005-07-01 1970.070639709780
2005-08-01 1806.235231651150
2005-09-01 1884.029830696340
2005-10-01 1966.936173774030
2005-11-01 1991.694797569710
2005-12-01 1668.569527853810
2006-01-01 1962.844428501700
2006-02-01 1901.805821858660
2006-03-01 1662.990447230660
2006-04-01 1525.741712096900
2006-05-01 1611.174850765010
2006-06-01 1474.459609549380
2006-07-01 1266.587608690410
2006-08-01 1436.196569635990
2006-09-01 1439.138529298110
2006-10-01 1334.261257796230
2006-11-01 1461.500802000100
2006-12-01 1223.633860380780
2007-01-01 1293.076136993220
2007-02-01 1595.690613272350
2007-03-01 1417.792461662740
2007-04-01 1127.580042891430
2007-05-01 1513.537720532770
2007-06-01 1268.527195513210
2007-07-01 1298.764634191360
2007-08-01 1170.399951519600
2007-09-01 949.724054538232
2007-10-01 967.298392199287
2007-11-01 974.608658596607
2007-12-01 908.045777141242
2008-01-01 924.617772112672
2008-02-01 825.784113060457
2008-03-01 733.853771275587
2008-04-01 779.590835636638
2008-05-01 646.821404009757
2008-06-01 771.737713742917
2008-07-01 780.606183791976
2008-08-01 765.212276429572
2008-09-01 740.733435071379
2008-10-01 1161.406729721510
2008-11-01 609.161275590720
2008-12-01 678.985526168696
2009-01-01 611.410589092715
2009-02-01 658.096814619647
2009-03-01 672.759758854537
2009-04-01 741.004617203864
2009-05-01 608.915480231245
2009-06-01 763.395438268038
2009-07-01 839.745578839348
2009-08-01 675.936716018852
2009-09-01 861.621753105538
2009-10-01 874.425194222614
2009-11-01 798.894896935974
2009-12-01 930.472509177437
2010-01-01 824.513717527279
2010-02-01 535.141188004148
2010-03-01 912.926537929242
2010-04-01 911.510743563960
2010-05-01 743.002856205059
2010-06-01 727.851411355047
2010-07-01 721.647884999717
2010-08-01 801.768139413116
2010-09-01 789.297009302293
2010-10-01 624.969713051511
2010-11-01 792.361891830003
2010-12-01 655.573230576016
2011-01-01 749.951695840114
2011-02-01 745.124319910570
2011-03-01 755.824220762737
2011-04-01 687.590977940835
2011-05-01 812.109042100065
2011-06-01 781.232774705268
2011-07-01 793.920150008065
2011-08-01 849.096270017486
2011-09-01 786.490447399595
2011-10-01 818.554568333019
2011-11-01 740.258594453210
2011-12-01 933.588603707060
2012-01-01 893.687646253192
2012-02-01 1083.678385333740
2012-03-01 713.243766473529
2012-04-01 704.632536880192
2012-05-01 1066.453627235700
2012-06-01 926.255084690208
2012-07-01 878.798523297161
2012-08-01 1018.606617913810
2012-09-01 970.682649012917
2012-10-01 967.350478356738
2012-11-01 1074.818568149930
2012-12-01 1085.871445274460
2013-01-01 1102.313823143640
2013-02-01 1326.243070572830
2013-03-01 1265.181896352530
2013-04-01 1330.135789650040
2013-05-01 1267.765185391710
2013-06-01 933.468109756784
2013-07-01 1308.055697404220
2013-08-01 1061.927262948940
2013-09-01 1091.130371773800
2013-10-01 1293.983675312850
2013-11-01 1190.501624843730
2013-12-01 1006.236800166740
2014-01-01 1069.768054509850
2014-02-01 1069.783090848740
2014-03-01 1052.698352867990
2014-04-01 1075.014492859850
2014-05-01 1153.246759582220
2014-06-01 1036.472217762360
2014-07-01 1059.450541120950
2014-08-01 1152.349446043960
2014-09-01 1152.173733723590
2014-10-01 1065.600770805690
2014-11-01 1066.471275031190
2014-12-01 949.305900075001
2015-01-01 1021.720445694620
2015-02-01 806.183364635637
2015-03-01 940.216002483426
2015-04-01 1030.621005222510
2015-05-01 948.613869840397
2015-06-01 1165.867827635650
2015-07-01 1137.906007043020
2015-08-01 1023.456231288580
2015-09-01 1003.007987835660
2015-10-01 1192.491350506680
2015-11-01 971.356561927695
2015-12-01 1201.543746526460
2016-01-01 1122.554161720340
2016-02-01 1000.145396623230
2016-03-01 1107.213729567360
2016-04-01 1018.080252713050
2016-05-01 1048.651106554040
2016-06-01 1053.473183937820
2016-07-01 974.175044388063
2016-08-01 1275.642990410650
2016-09-01 1077.654383635040
2016-10-01 939.570043862891
2016-11-01 1117.080102876410
2016-12-01 1299.394116376700
2017-01-01 1057.579608960810
2017-02-01 1242.057207862950
2017-03-01 1294.909917144330
2017-04-01 1082.511321755550
2017-05-01 1338.992498265730
2017-06-01 1185.078425646820
2017-07-01 1141.860533535520
2017-08-01 1287.849515254250
2017-09-01 1388.239804766190
2017-10-01 1148.773516312200
2017-11-01 1289.764994589780
2017-12-01 953.116600708343
2018-01-01 1239.700912640560
2018-02-01 1145.023531841810
2018-03-01 1125.547608379480
2018-04-01 1220.477486254820
2018-05-01 1124.359345791950
2018-06-01 1130.895278654050
2018-07-01 1197.324368442700
2018-08-01 1101.038139811380
2018-09-01 854.355967847513
2018-10-01 1268.231658765360
2018-11-01 1032.792636662130
2018-12-01 1094.047996057300
2019-01-01 1016.910443953700
2019-02-01 1052.436310027850
2019-03-01 1025.453316994240
2019-04-01 1200.729938358570
2019-05-01 1061.643392538140
2019-06-01 1063.241839498670
2019-07-01 1091.104485398090
2019-08-01 1068.362444045730
2019-09-01 962.342973788632
2019-10-01 1000.312002955440
2019-11-01 1050.650223666810
2019-12-01 927.465794628272
2020-01-01 1079.892177387690
2020-02-01 1168.612632502780
2020-03-01 820.532884299251
2020-04-01 863.463662671987
2020-05-01 809.005874220879
2020-06-01 981.963643854726
2020-07-01 1079.341618921470
2020-08-01 1050.239625366710
2020-09-01 1250.704401848930
2020-10-01 1343.608435287600
2020-11-01 1228.957261791230
2020-12-01 1296.969598390740
2021-01-01 1345.258042475390
2021-02-01 1121.942597509270
2021-03-01 1237.369650174970
2021-04-01 1064.920191422120
2021-05-01 1089.728996890160
2021-06-01 1086.354514845690
2021-07-01 946.772786063388
2021-08-01 1026.538453790090
2021-09-01 1074.798571486910
2021-10-01 989.999121194345
2021-11-01 1044.043755638230
2021-12-01 1154.742457077970
2022-01-01 1010.794672352990
2022-02-01 1156.844143958030
2022-03-01 1282.226614333530
2022-04-01 993.690613800713
2022-05-01 1060.639972813090
2022-06-01 981.422308176737
2022-07-01 721.226868797845
2022-08-01 870.085401796859
2022-09-01 873.803387003951
2022-10-01 860.858738804993
2022-11-01 901.751014751432
2022-12-01 750.715901785086
2023-01-01 709.517261020448
2023-02-01 828.021347319634
2023-03-01 857.576015402517
2023-04-01 903.873570573919
2023-05-01 1113.229615723930
2023-06-01 867.875543567804
2023-07-01 645.022688409391
2023-08-01 961.364440467080
2023-09-01 826.890979572949
2023-10-01 849.748909244434
2023-11-01 833.142809839625
2023-12-01 857.387113161199
2024-01-01 1012.754589518910
2024-02-01 1044.653431804210
2024-03-01 1003.830145604840
2024-04-01 1053.246095726030
2024-05-01 906.053008241007
2024-06-01 795.204976055193
2024-07-01 914.142232049914
2024-08-01 934.667974631900
2024-09-01 740.895591430844
2024-10-01 1020.350448370740
2024-11-01 1033.830767271770
2024-12-01 970.723570272659
2025-01-01 1229.296179723000
2025-02-01 892.053339676519
2025-03-01 817.804458413003
2025-04-01 760.954598368107
2025-05-01 863.113343384849
2025-06-01 891.238780259003
2025-07-01 873.271509655448
2025-08-01 800.657919974557
2025-09-01 784.548706824120
2025-10-01 688.722131868906
2025-11-01 658.979170834058
2025-12-01 973.825735521728
2026-01-01 726.598742881866
2026-02-01 761.777192104537
2026-03-01 763.993070490612
2026-04-01 839.460310474127
2026-05-01 845.252054843103
2026-06-01 928.784013011466
2026-07-01 854.437326311102
2026-08-01 731.737587327858

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