Data / Rankings / Housing units authorized by building permits / Counties in Maryland

Counties in Maryland by housing units authorized by building permits

Montgomery County had the highest housing units authorized by building permits of 24 counties in 2024, at 3,656. Somerset County had the lowest, at 47. The median was 317. Source: the U.S. Census Bureau.

Highest3,656Montgomery County
Lowest47Somerset County
Median31724 counties

All counties, 2024

CSVChart (SVG)

Montgomery CountyMontgomery County: 3,656 count3,656Frederick CountyFrederick County: 1,562 count1,562Charles CountyCharles County: 1,542 count1,542Baltimore CountyBaltimore County: 1,511 count1,511Prince George's CountyPrince George's County: 1,473 count1,473Anne Arundel CountyAnne Arundel County: 1,304 count1,304Baltimore cityBaltimore city: 1,273 count1,273Howard CountyHoward County: 881 count881Harford CountyHarford County: 803 count803Cecil CountyCecil County: 561 count561Queen Anne's CountyQueen Anne's County: 356 count356Worcester CountyWorcester County: 354 count354Wicomico CountyWicomico County: 279 count279St. Mary's CountySt. Mary's County: 265 count265Washington CountyWashington County: 232 count232Carroll CountyCarroll County: 156 count156Garrett CountyGarrett County: 122 count122Talbot CountyTalbot County: 104 count104Calvert CountyCalvert County: 101 count101Dorchester CountyDorchester County: 79 count79Allegany CountyAllegany County: 59 count59Caroline CountyCaroline County: 55 count55Kent CountyKent County: 48 count48Somerset CountySomerset County: 47 count47
count. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-10.

Full ranking

RankCounties2024
count		Change on 2023
1Montgomery County Estimated3,656+27.8%
2Frederick County Estimated1,562-5.1%
3Charles County Estimated1,542+37.3%
4Baltimore County Estimated1,511-9.7%
5Prince George's County Estimated1,473-51.2%
6Anne Arundel County Estimated1,304+22%
7Baltimore city Estimated1,273-30.9%
8Howard County Estimated881+10.4%
9Harford County Estimated803-43%
10Cecil County Estimated561+146.1%
11Queen Anne's County Estimated356-33.6%
12Worcester County Estimated354-30.3%
13Wicomico County Estimated279+38.8%
14St. Mary's County Estimated265-31.3%
15Washington County Estimated232-13.1%
16Carroll County Estimated156-25.7%
17Garrett County Estimated122-21.3%
18Talbot County Estimated104-30.2%
19Calvert County Estimated101+6.3%
20Dorchester County Estimated79+14.5%
21Allegany County Estimated59+210.5%
22Caroline County Estimated55-20.3%
23Kent County Estimated48-32.4%
24Somerset County Estimated47-7.8%

Other periods

About this ranking

Annual number of new privately owned housing units authorized by building permits, from the US Census Bureau Building Permits Survey.

Final annual county estimates include imputation for missing reports. Counts housing units, not buildings, starts, completions or sales. Covers permit-issuing areas; areas where permits are not required are outside the survey. Not seasonally adjusted or expressed as an annualized monthly rate. The total is the sum of units in the four published structure categories; inputs are retained.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Building Permits Survey: final annual county estimates of new privately owned housing units authorized, including imputation. https://www2.census.gov/econ/bps/County/co2024a.txt. Retrieved 2026-10-10.

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Rank Counties in Maryland by housing units authorized by building permits using official data, and cite the source.
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Questions

Which county has the highest housing units authorized by building permits?

Montgomery County, with 3,656 in 2024, according to the U.S. Census Bureau.

Which county has the lowest housing units authorized by building permits?

Somerset County, with 47 in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Building Permits Survey: final annual county estimates of new privately owned housing units authorized, including imputation. Retrieved 2026-10-10.

Housing units authorized by building permits: other rankings

Counties in Maryland: more rankings