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 2026-09-01
Last Updated 2026-10-27 8:49 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 2459.553009873110
2000-02-01 2487.720167342800
2000-03-01 2917.600127895870
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 2626.288241820920
2001-01-01 2533.680123399910
2001-02-01 2573.967970588980
2001-03-01 2381.239025866370
2001-04-01 2154.353563224440
2001-05-01 2290.419533820580
2001-06-01 2346.906833982520
2001-07-01 2203.076977845840
2001-08-01 2333.749988937950
2001-09-01 2223.860531238100
2001-10-01 2495.785668378760
2001-11-01 2594.872227868500
2001-12-01 2026.371532408850
2002-01-01 2561.524273694410
2002-02-01 2730.270298776080
2002-03-01 2106.701570109560
2002-04-01 2379.881214505370
2002-05-01 2268.153054096270
2002-06-01 2298.483516159960
2002-07-01 2630.904170565120
2002-08-01 2650.740671742730
2002-09-01 2711.233084809250
2002-10-01 2843.796417506360
2002-11-01 2522.208912796980
2002-12-01 2308.851847255190
2003-01-01 2497.687637410450
2003-02-01 2191.754499558580
2003-03-01 2488.917382141310
2003-04-01 2520.978328555430
2003-05-01 2740.819674713520
2003-06-01 3163.793377742630
2003-07-01 2539.905302434330
2003-08-01 2462.139479426320
2003-09-01 2509.996154859570
2003-10-01 2469.246149252570
2003-11-01 2171.322340687460
2003-12-01 2623.641775675090
2004-01-01 2411.063841820210
2004-02-01 1840.642123838700
2004-03-01 2353.021554712490
2004-04-01 2387.701737388850
2004-05-01 1988.077154707810
2004-06-01 1885.571749759850
2004-07-01 2138.209193316730
2004-08-01 2287.909618173850
2004-09-01 2947.900030126350
2004-10-01 2015.031484373880
2004-11-01 2099.270304569840
2004-12-01 2478.152088366370
2005-01-01 1994.408882211170
2005-02-01 1995.988783565490
2005-03-01 2300.858283187220
2005-04-01 2137.230075426330
2005-05-01 2356.348364546400
2005-06-01 2572.774886279190
2005-07-01 1970.070639709620
2005-08-01 1806.235231650690
2005-09-01 1884.029830695760
2005-10-01 1966.936173771380
2005-11-01 1991.694797559660
2005-12-01 1668.569527854280
2006-01-01 1962.844428502510
2006-02-01 1901.805821860680
2006-03-01 1662.990447234090
2006-04-01 1525.741712103180
2006-05-01 1611.174850766700
2006-06-01 1474.459609553810
2006-07-01 1266.587608693860
2006-08-01 1436.196569623780
2006-09-01 1439.138529294590
2006-10-01 1334.261257788310
2006-11-01 1461.500801980350
2006-12-01 1223.633860377500
2007-01-01 1293.076136993540
2007-02-01 1595.690613287210
2007-03-01 1417.792461676000
2007-04-01 1127.580042907160
2007-05-01 1513.537720543530
2007-06-01 1268.527195525560
2007-07-01 1298.764634198730
2007-08-01 1170.399951491330
2007-09-01 949.724054519529
2007-10-01 967.298392177914
2007-11-01 974.608658551450
2007-12-01 908.045777115587
2008-01-01 924.617772102859
2008-02-01 825.784113083055
2008-03-01 733.853771309190
2008-04-01 779.590835689546
2008-05-01 646.821404052534
2008-06-01 771.737713780844
2008-07-01 780.606183799456
2008-08-01 765.212276362405
2008-09-01 740.733434989299
2008-10-01 1161.406729582140
2008-11-01 609.161275502416
2008-12-01 678.985526076519
2009-01-01 611.410589044728
2009-02-01 658.096814837999
2009-03-01 672.759758822314
2009-04-01 741.004617298951
2009-05-01 608.915480378919
2009-06-01 763.395438275973
2009-07-01 839.745578814318
2009-08-01 675.936715989946
2009-09-01 861.621753106997
2009-10-01 874.425194198837
2009-11-01 798.894896786030
2009-12-01 930.472508809480
2010-01-01 824.513717146053
2010-02-01 535.141188145494
2010-03-01 912.926537470812
2010-04-01 911.510743576355
2010-05-01 743.002856594643
2010-06-01 727.851411932501
2010-07-01 721.647884340754
2010-08-01 801.768140078013
2010-09-01 789.297010295388
2010-10-01 624.969711866159
2010-11-01 792.361892826276
2010-12-01 655.573230914537
2011-01-01 749.951695787786
2011-02-01 745.124320148469
2011-03-01 755.824219597219
2011-04-01 687.590976772199
2011-05-01 812.109040505301
2011-06-01 781.232774083182
2011-07-01 793.920147276971
2011-08-01 849.096271848427
2011-09-01 786.490451738404
2011-10-01 818.554569279489
2011-11-01 740.258601092760
2011-12-01 933.588611748756
2012-01-01 893.687653832688
2012-02-01 1083.678364954460
2012-03-01 713.243767393139
2012-04-01 704.632534258274
2012-05-01 1066.453618351690
2012-06-01 926.255074791163
2012-07-01 878.798511360870
2012-08-01 1018.606617634020
2012-09-01 970.682661426939
2012-10-01 967.350495495600
2012-11-01 1074.818604106290
2012-12-01 1085.871488041360
2013-01-01 1102.313859716350
2013-02-01 1326.243026903070
2013-03-01 1265.181895106830
2013-04-01 1330.135758807100
2013-05-01 1267.765130656280
2013-06-01 933.468060188030
2013-07-01 1308.055627955910
2013-08-01 1061.927265825080
2013-09-01 1091.130358024880
2013-10-01 1293.983958492820
2013-11-01 1190.501662120770
2013-12-01 1006.236940143950
2014-01-01 1069.768093196920
2014-02-01 1069.783014591600
2014-03-01 1052.698315425880
2014-04-01 1075.014415824870
2014-05-01 1153.246631112650
2014-06-01 1036.472096624640
2014-07-01 1059.450432460420
2014-08-01 1152.349466734270
2014-09-01 1152.173639035830
2014-10-01 1065.601232571050
2014-11-01 1066.471321419920
2014-12-01 949.306454300257
2015-01-01 1021.720464938990
2015-02-01 806.183281427062
2015-03-01 940.215901241878
2015-04-01 1030.620798856740
2015-05-01 948.613606160530
2015-06-01 1165.867460880210
2015-07-01 1137.905589881010
2015-08-01 1023.456008189340
2015-09-01 1003.008597779930
2015-10-01 1192.492498765160
2015-11-01 971.356487669773
2015-12-01 1201.544945687890
2016-01-01 1122.554238796230
2016-02-01 1000.145297672190
2016-03-01 1107.213462733470
2016-04-01 1018.079667720150
2016-05-01 1048.650261242270
2016-06-01 1053.472209462610
2016-07-01 974.174111863084
2016-08-01 1275.642361414270
2016-09-01 1077.656451622140
2016-10-01 939.572313829473
2016-11-01 1117.081279995750
2016-12-01 1299.396530719590
2017-01-01 1057.581505824880
2017-02-01 1242.054050724410
2017-03-01 1294.907488463070
2017-04-01 1082.508914329370
2017-05-01 1338.987405549890
2017-06-01 1185.077010817530
2017-07-01 1141.860213022960
2017-08-01 1287.850474051850
2017-09-01 1388.247778188340
2017-10-01 1148.781320089290
2017-11-01 1289.770416735890
2017-12-01 953.119292473920
2018-01-01 1239.702868621910
2018-02-01 1145.013696753950
2018-03-01 1125.538514607110
2018-04-01 1220.469211559450
2018-05-01 1124.350781434610
2018-06-01 1130.895770956090
2018-07-01 1197.328805806920
2018-08-01 1101.043838933770
2018-09-01 854.366674349196
2018-10-01 1268.250013691170
2018-11-01 1032.802674550920
2018-12-01 1094.055628649860
2019-01-01 1016.917064483750
2019-02-01 1052.434032899590
2019-03-01 1025.363932996630
2019-04-01 1200.736240121520
2019-05-01 1061.650064605400
2019-06-01 1063.257257516050
2019-07-01 1091.137296815540
2019-08-01 1068.373902453390
2019-09-01 962.356517270795
2019-10-01 1000.325035380850
2019-11-01 1050.656805482660
2019-12-01 927.470151665564
2020-01-01 1079.896936376870
2020-02-01 1168.610558976380
2020-03-01 820.395446875675
2020-04-01 863.477182475377
2020-05-01 809.048861818461
2020-06-01 981.986452270441
2020-07-01 1079.456578521610
2020-08-01 1050.238303273770
2020-09-01 1250.698896217370
2020-10-01 1343.593559226550
2020-11-01 1228.938223347340
2020-12-01 1296.948503093250
2021-01-01 1345.236737690680
2021-02-01 1121.928694789030
2021-03-01 1237.072543245870
2021-04-01 1064.965435778780
2021-05-01 1089.854851736150
2021-06-01 1086.581900803180
2021-07-01 946.959253013177
2021-08-01 1026.538279860200
2021-09-01 1074.452952535650
2021-10-01 989.965498613337
2021-11-01 1043.994545001830
2021-12-01 1154.680796934480
2022-01-01 1010.738658238530
2022-02-01 1156.813769333380
2022-03-01 1281.957172005220
2022-04-01 993.798463931473
2022-05-01 1060.892412605450
2022-06-01 981.855286697354
2022-07-01 721.423552809012
2022-08-01 870.048865189448
2022-09-01 873.181588980933
2022-10-01 860.759382726960
2022-11-01 901.643652193793
2022-12-01 750.611145102238
2023-01-01 709.408556254659
2023-02-01 827.933118042610
2023-03-01 857.398698164111
2023-04-01 904.071361492646
2023-05-01 1113.751231396430
2023-06-01 868.749903999524
2023-07-01 645.531016822818
2023-08-01 961.137794838262
2023-09-01 825.101452401711
2023-10-01 849.661109793940
2023-11-01 833.117047264673
2023-12-01 857.059717779500
2024-01-01 1012.515478898110
2024-02-01 1044.492099849770
2024-03-01 1003.688068393370
2024-04-01 1053.608055751820
2024-05-01 906.771030663274
2024-06-01 796.509290551346
2024-07-01 915.618237236850
2024-08-01 934.590857225765
2024-09-01 737.265143222362
2024-10-01 1020.299674202610
2024-11-01 1033.970158866560
2024-12-01 970.110758853180
2025-01-01 1228.970866892370
2025-02-01 891.930886333161
2025-03-01 817.771229553564
2025-04-01 761.326540203405
2025-05-01 864.093018064007
2025-06-01 893.412164672486
2025-07-01 875.556474416298
2025-08-01 800.822443058031
2025-09-01 777.713041436577
2025-10-01 688.818475531662
2025-11-01 659.270102776339
2025-12-01 973.030063209001
2026-01-01 726.471117389096
2026-02-01 761.787359554155
2026-03-01 764.090129398712
2026-04-01 839.992037984878
2026-05-01 846.459087127118
2026-06-01 931.517074015139
2026-07-01 857.305617864897
2026-08-01 732.249395622917
2026-09-01 837.924720714071

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