What Is a PE Stamp and When Do You Need One?

Short answer: a PE stamp is the seal and signature of a licensed Professional Engineer on drawings or calculations they have reviewed and take responsibility for. Building departments commonly require one for structural work such as removing a bearing wall, adding on, building foundations or retaining walls. Your jurisdiction decides what your project needs.

What the stamp shows

A PE seal usually carries the engineer’s name, license number and the state where they are licensed, together with a signature and date. It tells the plan reviewer who designed or checked the work, and that this person is accountable to the state licensing board for it. A stamp is not decoration. An engineer should seal only work they have personally been in charge of, and only in the kind of engineering they are qualified in.

What “PE” means

PE stands for Professional Engineer. To earn it, an engineer typically completes an engineering degree, passes a fundamentals exam, works under a licensed engineer for several years and then passes a national professional exam. The license is then issued by an individual state, which is why the stamp only counts in the states where the engineer holds a license. We explain that in more detail in can an out-of-state engineer stamp my drawings.

When building departments ask for one

• Removing or altering a load-bearing wall, or cutting a large opening.
• Additions, second stories and new foundations.
• Retaining walls that are tall or that carry a driveway, slope or building.
• Decks and structures that go beyond the standard tables in the code.
• Commercial tenant improvements, mezzanines and change of occupancy projects.
• Solar installations where the roof or mounting needs a structural check.

Simple work that follows the prescriptive tables in the code, such as a small low deck or a basic renovation, often needs no engineer. The building department makes the final decision.

PE stamp versus architect’s stamp

Architects are licensed separately from engineers. In many places an architect’s seal is required for certain building types and sizes, while a PE seal covers structural, mechanical, electrical or civil design. Some projects need both. Which one your project needs depends on your state’s licensing law and the building type.

Getting drawings you already have stamped

If you or a designer already have a set of drawings, an engineer can review them, tell you whether anything needs to change, and seal them. Stamping only starts at $300 for residential, $600 for commercial and $900 for industrial work. If the engineer finds problems, we tell you what has to change before sealing anything. Starting fees for full drawing sets are on our pricing page.

How to check a stamp

1. Read the name, license number and state on the seal.
2. Look the license up on that state’s licensing board website.
3. Confirm it is active and covers the kind of engineering your project needs.

How we handle it

Every project is matched to a professional licensed in your project’s state and in the discipline the work needs. The engineer’s name and license number are shared on request, before you approve the quote. Read how we work, or send us your project to find out what your building department is likely to require.

Sources

• A Primer on Engineering Licensure in the United States (ASEE, hosted by NSPE)
• Guidance on the PE sign and stamp (NSPE)

This article is general information, not legal advice. Each state’s licensing board is the final authority on seal requirements in that state. Checked October 2026.