Pennsylvania permit requirements

We have read and dated 23 permit rules across 2 jurisdictions in Pennsylvania. On every measurement where two or more of them publish a comparable number, they land on the same one: pool at 24 inches and shed at 200 sq ft.

Jurisdictions: 2
Verified rules: 23
Permit always required: 11
Depends on the project: 11

Do you need a building permit in Pennsylvania?

Usually it depends on the size of the job, and the size that decides it is not set by Pennsylvania: permits are issued by the city or county, not the state, so the rule that governs your project is the one your own jurisdiction publishes. 11 of those local rules require a permit outright, 11 depend on a size or scope condition the office publishes, and 0 need none. Pennsylvania sets the building code those local rules derive from; your city or county sets the threshold and the fee.

How permitting works in Pennsylvania

By Mario Bailey Last checked 28 Sep 2026 · 7 official sources

Who writes the code, and who enforces it

Pennsylvania’s residential rules run through the Uniform Construction Code (UCC), built on the International Residential Code with state amendments. Under Act 45 of 1999, L&I (the Department of Labor and Industry) puts the UCC into regulation, adopting the Review and Advisory Council’s updates; residential construction follows the International Residential Code of 2021, effective January 1, 2026. Each municipality elects to enforce the UCC, with staff or a retained agency, or to opt out; over 90% of the state’s 2,562 municipalities enforce it locally.

What the state decides for everyone

Two rules reach every address. Under 34 Pa. Code § 403.62(a), an owner may apply for and hold the permit; there is no statewide trade license, though a municipality may license trades, as Philadelphia does. The Home Improvement Consumer Protection Act separately registers home improvement contractors, with an exception below $5,000 a year in work, and excludes work performed without compensation by the owner on their own residence.

What your municipality decides

In an opt-out municipality, the applicant hires a certified third-party agency for residential work, while the Department, or its contracted agency, handles commercial work, under 34 Pa. Code § 403.103. A municipality that administers the UCC sets its own fees, and its governing body may enact a stricter ordinance under Section 503(c), after a public hearing and L&I review. Section 501(a.1) bars a municipality in a county of the second class from enforcing the plumbing provisions, a state carve-out, not a municipal one: Allegheny County retains its own plumbing code instead, so Pittsburgh’s plumbing permits come from the Allegheny County Health Department. See what you can build without a permit in Pennsylvania for how each jurisdiction’s published rules compare.

If work was done without a permit

Section 903 makes violating any provision of the Act a summary offense, punishable on conviction by a fine of not more than $1,000 and costs, with each day a separate violation; this site reads unpermitted work as a violation. Pennsylvania has no general retroactive permit process; the one exception, 34 Pa. Code § 403.62(b), is that an emergency repair or replacement of equipment may proceed if the application follows within 3 business days. Other unpermitted work goes through the building code official’s enforcement process and a normal permit application. See penalties for building without a permit in Pennsylvania for the full citations.

Do Pennsylvania jurisdictions agree?

Every row below is a measurement at least two Pennsylvania jurisdictions publish, compared against each other. This is the question a statewide answer cannot settle, because the number that governs your project is the one your own city or county publishes.

Project	Published threshold	Jurisdictions	Agreement
Pool	24 inches	2	Same number in all 2
Shed	200 sq ft	2	Same number in all 2

2 of 2 comparable measurements are uniform across Pennsylvania; 0 are not. Latest verification 2026-08-15.

Where Pennsylvania jurisdictions split

The verdict for each project across the 2 Pennsylvania jurisdictions we cover. On 4 of 13 projects they do not give the same answer, which is why a statewide answer is not one.

Project	Permit required	Depends	Across the state
Deck	1	1	Answer varies
Electrical	1	1	Answer varies
Fence	1	1	Answer varies
HVAC	1	1	Answer varies
Plumbing	2		Same answer everywhere
Pool		2	Same answer everywhere
Roof Replacement	2		Same answer everywhere
Shed		2	Same answer everywhere
Solar	2		Same answer everywhere
Bathroom Remodel		1	Same answer everywhere
EV Charger		1	Same answer everywhere
Patio		1	Same answer everywhere
Water Heater	1		Same answer everywhere

Building without a permit in Pennsylvania

Under Section 903 of the Pennsylvania Construction Code Act (Act 45 of 1999): '(1) Any individual, firm or corporation that violates any provision of this act commits a summary offense and shall, upon conviction, be sentenced to pay a fine of not more than $1,000 and costs. (2) Each day that a violation of this act continues shall be considered a separate violation.' The penalty amount is forwarded to the entity with enforcement jurisdiction (Section 903(b)).

Penalties, the as-built path, and what the statute actually says

What you can build without a permit in Pennsylvania

0 of the 22 answered rules across Pennsylvania need no permit at all and 11 turn on a size or scope condition the jurisdiction publishes, by project and jurisdiction, in each office's own words.

The exemptions and conditions, jurisdiction by jurisdiction

Building code in Pennsylvania

Pennsylvania Uniform Construction Code (UCC). Adopts the International Residential Code (IRC), with Pennsylvania amendments.

Administered by Pennsylvania Department of Labor and Industry. Official source

Municipalities may administer and enforce the UCC locally or opt out, in which case applicants hire certified third-party agencies for residential work and L&I handles commercial work.

Most local permit thresholds derive from this code. See our sources and standards.

What each Pennsylvania jurisdiction publishes

One line per jurisdiction, written from its own rules rather than from a state summary. This is the section that used to be a list of links, and the states with the fewest jurisdictions to compare are the ones it says the most about.

Philadelphia 13 rules
6 of 13 projects always need a permit and 7 turn on the size or scope of the work. Published thresholds include deck at 216 sq ft and fence at 6 feet.
Pittsburgh 10 rules
5 of 9 projects always need a permit and 4 turn on the size or scope of the work. The ones that depend on the project are electrical, HVAC, pool and shed. Published thresholds include pool at 24 inches and shed at 200 sq ft. 1 question is unresolved because the jurisdiction publishes no answer.