Category: Research
Commercial energy code by state: which ASHRAE 90.1 and IECC editions apply in 2026
A state-by-state registry of the commercial building energy code in force on 2026-10-07, checked against official state sources and the U.S. Department of Energy’s September 2026 status data.
Construction Apprenticeship Statistics: Apprentices by Trade, State and Completion, FY2025
How many registered apprentices train in U.S. construction, which trades and states have the most, how many finish, and how the pipeline compares with projected openings.
SBA Loans for Construction Companies: FY2025 Approvals by State, Program and Risk
A state atlas built from the SBA’s loan-level FOIA records, scaled by the number of construction establishments in each state.
Best Time of Year to Build: Monthly Workload Index for US Commercial Construction and State Seasonal Swing Ranking
A monthly index of private nonresidential spending and construction employment, a 51-state ranking of seasonal swing, and tests of how stable the pattern is.
Commercial building permits by city: counts, value and issuance times in 8 large US cities, 2025 to 2026
A side-by-side of eight city open-data permit files, using each city’s own commercial label, with every count reproducible from the published CSVs.
Mechanics lien laws by state: lien deadlines, preliminary notice and prompt pay rules for commercial subcontractors
A statute-by-statute registry of how long subcontractors have to lien private commercial projects, who must send notice first, and how fast they must be paid, checked against each state’s code on 2026-10-06.
Workers Comp Rates for Contractors by State: Premium Index and Construction Class Codes
A state atlas built on Oregon’s 2024 premium rate ranking and the 2026 class rate tables published in California, Florida, Ohio, North Dakota and Washington.
Immigrant construction workers vs U.S.-born workers: share, trades, states and pay
A side-by-side comparison built from the BLS Foreign-Born Workers release for 2025, the Census 2024 American Community Survey microdata and DOL H-2B records.
Construction Business Failure Rate: 1, 5 and 10-Year Survival in U.S. Data
Every construction establishment cohort opened since 1994, compared with 18 other private sectors and across three business cycles, from BLS Business Employment Dynamics and Census Business Dynamics Statistics.
Construction Union Membership Tracker 2025: Rate, Earnings and States
Annual tracker of the union membership rate, member count, union pay premium and state rates for U.S. construction workers, built from BLS and academic CPS data.