Plumbing, heating & AC contractors in Maryland 1,963 establishments · 30,769 employees · 2024
Firms (MD)
1,963
Employment
30,769
Avg Annual Pay
$85,942
State Rank
#22 of 52
How Maryland compares to national
Metric
Maryland
National
Maryland vs. U.S.
Establishments
1,963
122,643
1.6% of U.S. total
Avg annual pay
$85,942
$78,183
+$7,759 (+9.9%)
Location quotient
0.99
1.00
1% less dense than national
Avg firm size (employees)
15.7
10.5
—
Year-over-year firm growth
-2.5%
—
—
Reading this
An establishment is a single physical location where business is conducted. A firm with multiple locations counts as multiple establishments. "Avg pay" is wages and salaries per employee, including bonuses and tips — for proprietorships, the owner's take is largely outside this number. The location quotient (LQ) of 0.99 means plumbing, heating & ac contractors are 1% under-represented in Maryland's business mix relative to the U.S. average.
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Source. BLS Quarterly Census of Employment and Wages — 2024 annual averages, private-ownership only, NAICS 23822 (5-digit aggregation). Establishment counts include any firm with at least one paid employee covered by state unemployment insurance.
SMB Density · firm counts, employment, and wages by industry × state · data from BLS QCEW 2024 annual (private ownership, state-level; mostly 6-digit NAICS, 3 specialty-trade industries at 5-digit aggregation) · data.json