EngineeringID Staff
Architect Stamp vs. Engineer Stamp: Who Seals What?
On most buildings both seals appear, each covering a different slice of the drawing set. Here is how responsible charge divides between the architect of record and the engineer of record.
On most buildings both seals appear on the same drawing set, each covering a different slice of it: the architect of record seals the architectural design, and the engineer of record seals the engineering analysis behind the systems that make the building stand up and run.
Neither seal is a general approval of the project. Each is a narrow, dated attestation by a named professional, and the reason a reviewer wants both is that they answer different questions — questions that would collapse into one, unanswerably, if a single seal covered everything.
Two licenses, two seals, one drawing set
An architect's seal and a professional engineer's seal record the same five facts: legal name as licensed, registration number, issuing state, the board's statutory title, and in some jurisdictions the discipline. Both mean responsible charge — that the professional personally prepared the work or directly, substantively supervised the people who did. Both are dated. Both are traced back to a public roster. Our guide at the architect stamp guide covers the first credential and the PE stamp guide covers the second, and read side by side they look almost identical.
What differs is the board that issued the license and the practice each board defines. That is the whole distinction, and it is enough. Two boards, two examinations, two bodies of knowledge, two standards of care, and therefore two separate answers on the same set of sheets.
Who seals what: a plain division
| Sealed by | Typically covers |
|---|---|
| Architect of record | The building's design: spatial organization, life-safety and egress, rated construction, accessibility, and code compliance of the architectural set. The question this seal answers is whether the building works as a building. |
| Engineer of record (PE) | The engineering analysis: structural, mechanical, electrical, plumbing, and civil or site engineering — each often sealed by a PE practicing in that discipline. The question this seal answers is whether the building stands up and runs. |
| Delegated or specialty engineer | Component design handed down from the engineer of record: steel connections, curtain wall, precast, cold-formed framing. Sealed by the engineer who performed that specific analysis, and carrying responsibility for that component alone. |
Picture a mid-rise with an occupied roof terrace. The architect seals the plan that puts people on the roof, the egress path off it, and the rated assembly around it. The structural engineer seals the calculations showing the framing carries that load and the lateral system resists it. If the egress run is too long, that is the architect's seal answering. If the slab deflects, that is the engineer's. A plan reviewer reads both seals precisely so that the right professional is on the hook for the right defect.
Where the line blurs
The boundary is cleaner in a table than on a job site. Some jurisdictions permit an architect to seal structural work incidental to a building they designed. Some permit a PE to seal buildings within a defined class. The existence, the width, and the conditions of those provisions are set by the boards, and they differ enough that quoting one state's rule at another state's reviewer is a way to lose an afternoon.
So do not carry a rule across a state line, and do not infer one from what a colleague got away with. Read both boards' practice acts for the jurisdiction where the project will be built. Our architect stamp requirements by state guide walks through how much the architectural side moves from board to board; the engineering side moves just as much.
And note that where a license technically permits something, competence still governs. An incidental-practice provision is permission from a board, not a certification of your judgment. A structural engineer is not, by virtue of the title, equipped to seal a fire-protection design, and a board will say so if asked.
Reading a set with more than one seal
A stamp is not blanket approval of the whole project. It certifies only the work its holder prepared or supervised. On a large set, several professionals seal their respective portions, and each is answerable for their own and no one else's. Your seal does not adopt the rest of the building by proximity, and it does not adopt the sheet stapled behind yours.
Read the seals, then, as a map of ownership. That map is what lets a public review process rely on private judgment without re-deriving it. It works only because every seal is honest about its boundaries — which is one more reason a seal applied loosely damages more than the engineer who applied it. It corrupts the chain of trust the whole document depends on.
Do this today
- Read both boards' rules for the jurisdiction where the project will be built, before the division of the set is settled rather than after.
- Confirm both registrations are active on the board rosters, and confirm them again on the date the seals will be applied.
- Never seal outside your competence, even where the license technically allows it. Permission from a board is not a substitute for judgment you do not have.
- Make the division of sheets explicit early, so that no sheet ends up in the gap between two professionals who each assumed the other owned it.
- Confirm the seal artwork itself against each board's spec. Our PE stamp requirements overview is the place to start on the engineering side.
Frequently asked questions
Do buildings need both an architect stamp and an engineer stamp?
On most buildings, yes. The architect of record seals the architectural design and the engineer of record seals the engineering analysis behind the structural, mechanical, electrical, plumbing, and civil systems. Each seal answers a different question, and each carries responsibility only for the sheets it covers.
Can an architect seal structural drawings?
Some jurisdictions permit an architect to seal structural work incidental to a building they designed, under conditions the board defines. Whether such a provision exists, and how wide it is, varies by board. Competence still governs regardless of what the license technically permits.
Does a stamp approve the whole project?
No. A stamp certifies only the work its holder prepared or directly supervised. On a set with multiple seals, each professional is answerable for their own portion, and a seal does not adopt adjacent sheets by proximity.