Knoxville Building Permit Timelines & Delays
Knoxville tells builders how long a plan review should take: 7 days for a house, and 14, 21 or 30 days for commercial work depending on its value. It has not always come close. In 2022 plan reviews, including revisions, averaged 54 days against a goal of about two weeks. After the City Council funded nine new positions in December 2023, the City reported beating every goal in May 2024, with house plans averaging 6 days. Since October 1, 2024 a Tennessee law adds a backstop for plans that arrive already checked by a registered third party: the City has 10 business days to answer.
Knoxville permitting, the figures
The key published figures for this jurisdiction — each cited to its official source.
What the data shows
Knoxville sets a written plan review goal for every project size, 7 days for residential projects and 14, 21 or 30 days for commercial projects depending on value, and schedules inspections for the next day when they are requested before 2 p.m. (City of Knoxville, Third-party law presentation, 2024).
In 2022 the City missed its own goal badly: plan reviews, including revisions, averaged 54 days against a goal of about two weeks, up from 38 days in 2017, as plan submissions rose from 1,638 to 2,414 (Compass, 2023).
Five months after the City Council funded nine new positions in December 2023, the City reported beating every goal: in May 2024 residential plans averaged 6 days against 7, and commercial plans 10 to 13 days against 14 to 30 (Knoxville Chamber, 2024).
Housing permits have fallen since: the City permitted 1,962 new housing units in 2025, down from 3,040 in 2024, with detached houses falling from 392 to 245 and multi-unit homes from 2,500 to 1,685 (Knoxville-Knox County Planning, Development Activity Reports, 2024 and 2025).
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. Permavia'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.
Knoxville permitting: FAQ
How long does it take to get a building permit in Knoxville, TN?
The City’s goal is 7 days for a residential plan review, 14 days for commercial projects under $500,000, 21 days from $500,000 to $20 million and 30 days above $20 million (City of Knoxville, Third-party law presentation). These are goals, and the City does not say whether they count business or calendar days. In May 2024 the City reported beating all of them, with house plans averaging 6 days (Knoxville Chamber, July 10, 2024); in 2022, reviews including revisions averaged 54 days (Compass, June 7, 2023). The City offers pre-permitting meetings on Mondays and Thursdays to sort out questions before you submit (City of Knoxville, City Matters, Sept 16, 2025).
Does the City of Knoxville or Knox County issue my building permit?
Inside city limits, the City’s Plans Review & Inspections Department issues building permits; call 865-215-4311 (City of Knoxville, Plans Review & Inspections). Outside city limits, Knox County Code Administration & Inspection, Suite 547 of the City County Building at 400 Main Street, handles permits; call 865-215-2325 (Knox County). Both offices are in the same building, so check which side of the city line your lot is on before you apply.
What is Tennessee’s 10-day rule for third-party plan review?
Since October 1, 2024, plans that a registered third party has already reviewed can be submitted to the local building department, which then has 10 business days to approve them, deny them for code problems or ask for more information. If it does not respond in time, the third party may submit to the State Fire Marshal’s Office, which also has 10 business days (Tennessee State Fire Marshal’s Office, Third-Party FAQ). The rules apply in jurisdictions that run their own plan review and inspections, and the State lists both Knoxville and Knox County among them (Tennessee State Fire Marshal’s Office, Exempt Jurisdictions).
How do I schedule a building inspection in Knoxville?
Schedule it online with your permit number. Requests made before 2 p.m. get a next-day inspection, and inspections can be booked up to three days out; call 865-215-3669 for problems (City of Knoxville, Inspection Scheduling). In April to June 2025 the City carried out 10,159 next-day inspections, 22% more than in the first quarter (City of Knoxville, City Matters, Sept 16, 2025).
Sources
All figures on this page are drawn from Knoxville Plans Review & Inspections: review benchmarks and the Tennessee third-party law, City of Knoxville, Plans Review & Inspections Department. The City’s own presentation on Tennessee’s third-party review law (effective October 1, 2024), which lists its plan review benchmarks (7 days for residential projects under the IRC; 14, 21 and 30 days for commercial projects by value) and its next-day inspection policy; supplemented by the City’s September 2025 Development Services update, Knoxville-Knox County Planning’s 2024 and 2025 Development Activity Reports, the State Fire Marshal’s Office third-party FAQ and its exempt-jurisdiction lists, and reporting by Compass (2023) and the Knoxville Chamber (2024) on review times. Read the City’s benchmark and third-party law presentation (City of Knoxville). Specific tables, reports, and pages are cited inline with each figure above.
Three kinds of numbers appear here. Stated: the 7-, 14-, 21- and 30-day review times are City benchmarks, from an undated City presentation made after the Tennessee third-party law took effect on October 1, 2024; the City does not say whether they are business or calendar days. Measured, as reported: the 54-day 2022 average (including revisions) and the plan submission counts are City data reported by Compass, a Knoxville news outlet, in June 2023; the May 2024 averages are City figures reported by the Knoxville Chamber, a business association, quoting the City’s chief operating officer, and cover one month. The City publishes quarterly Development Services reports, but they could not be read for this guide, so no measured review time after May 2024 is given; in September 2025 the City said its team was meeting its benchmarks. Measured: the inspection and permit counts are the City’s own for April to June 2025, and the housing unit counts are Knoxville-Knox County Planning’s for permits inside city limits; they measure volume, not review time. The Tennessee 10-business-day deadline applies only to plans reviewed by a registered third party. The population growth figure is our arithmetic from Census figures.