St. Louis Building Permit Timelines & Delays
St. Louis is one of the most jurisdictionally fragmented metros in the country. The City of St. Louis has been independent of St. Louis County since the 1877 'Great Divorce,' and the county itself contains 88 separate municipalities, each with its own zoning and building-code enforcement, per the county's own 2022 report. A developer building across that landscape faces a patchwork of disparate requirements, including historic masonry and brick standards.
St. Louis permitting, the figures
The key published figures for this jurisdiction — each cited to its official source.
What the data shows
St. Louis County contains 88 municipalities, each with its own zoning and building-code enforcement, and the City of St. Louis is a wholly independent jurisdiction, so a developer working across the metro confronts a patchwork of disparate codes and timelines (St. Louis County 2022 Financial Transparency Report).
The City of St. Louis is unusually transparent about performance, publishing its own average days-to-issue: residential permits averaged about 22 days in 2024 and 2025, improved from 33 days in 2021 (City of St. Louis open data).
Commercial review has degraded sharply: the city's average days-to-issue for commercial permits jumped to about 68 days in 2025 from roughly 37–41 in prior years, even as residential held steady (City of St. Louis open data).
Historic masonry and brick rehabs add a real but usually fast layer in the city: the Cultural Resources Office clears routine, compliant exterior work in a few days, while non-compliant or large projects escalate to the Preservation Board (City of St. Louis, Cultural Resources Office).
Most delay accumulates before technical review
The data points to the same lever everywhere: most delay accumulates before technical review, in completeness and resubmittal cycles. Permittable's Permit Review Diagnostic checks your plans against applicable codes and common reviewer issues before you submit — so your package is more likely to clear on the first pass.
St. Louis permitting: FAQ
Why is permitting in the St. Louis area so fragmented?
Because the metro is split many ways. The City of St. Louis separated from St. Louis County in 1877 and runs its own government, and the county contains 88 separate municipalities, each with its own zoning and building-code enforcement (St. Louis County 2022 Financial Transparency Report). A project that crosses municipal lines can face wholly different codes, fees, and review timelines.
How long does a residential permit take in the City of St. Louis?
The city publishes its own averages: residential permits took an average of about 22 days to issue in 2024 and 2025, down from 33 days in 2021, with roughly 74% issued within the city's target window (City of St. Louis open data). These are the city's reported mean days from application to issuance, a genuine measured figure, not a target.
Is commercial review slower in St. Louis?
Yes, and it has worsened. The city's average days to issue a commercial permit rose to about 68 days in 2025, up from roughly 37–41 days in 2021–2024, while residential averages held around 22 days (City of St. Louis open data).
Do historic brick and masonry rules add time?
In the city's historic and landmark districts, yes, exterior masonry work needs Cultural Resources Office review. Routine, compliant work (like tuckpointing) typically clears in a few days at the CRO desk, but non-compliant or larger projects go to the Preservation Board, which adds weeks (City of St. Louis, Cultural Resources Office).
Sources
All figures on this page are drawn from Building permits open data & St. Louis County fragmentation — City of St. Louis / St. Louis County. The City of St. Louis publishes its own average days-to-issue by year (residential ~22 days, 2025); St. Louis County's 2022 Financial Transparency Report documents 88 municipalities, each handling its own zoning and building-code enforcement. The independent city separated from the county in 1877. www.stlouis-mo.gov/data/dashboards/building-permits/years.cfm. Specific tables, reports, and pages are cited inline with each figure above.
The City of St. Louis figures are the city's own published averages (mean, not median) of days from application to issuance by year, a genuine measured metric, though the city does not publish the numeric definition of its 'target days,' so the ~74%-within-target share can't be precisely interpreted. The 88-municipality count is St. Louis County's own; it is the best available proxy for code fragmentation, though some small municipalities contract out building review, and no study isolates how much fragmentation specifically inflates permit timelines (that link is reasoned, not measured). St. Louis County's own residential turnaround is not published.