Can a Civil Engineer Stamp Architectural Drawings?

The short answer

A licensed Professional Engineer can seal architectural drawings in some situations and not in others. Three things decide it:

• State law. Each state has an engineering practice act and an architecture practice act. Together they say which professional may prepare and seal plans for which kinds of buildings.
• The building. Occupancy type, floor area, height and number of occupants often decide whether an architect is mandatory.
• The engineer’s competence. Engineering boards only allow a PE to seal work they are qualified to perform. A PE whose practice is drainage design should not seal a floor plan, even where the law would allow it.

Because the rules change at state lines, the right first step is to ask your building department, or ask us, which seal the architectural sheets need for your specific project.

When an architect is usually not required

Most states exempt certain small buildings from the architecture practice act. The most common exemption covers one- and two-family dwellings and their accessory structures, such as garages, sheds and many ADUs. Some states also exempt small commercial buildings or agricultural buildings below a size limit.

On an exempt building, the architectural sheets (floor plans, elevations, sections and schedules) can often be prepared by a designer or drafter. The building department may still require a PE seal on the structural parts: beams, headers, foundations, lateral bracing and connections. That is why many residential permit sets carry only an engineer’s seal, on the structural sheets and calculations.

Examples where a PE seal on structural drawings is typically enough:

• Room additions and garage plans for a single-family house
• Load-bearing wall removals and beam replacements
• Decks, patio covers and carports
• Pole barns and agricultural buildings, where the county requires a stamp at all

When an architect is usually required

Architecture laws generally reserve larger and higher-occupancy buildings for licensed architects. Typical triggers include:

• Assembly occupancies such as gyms, restaurants, churches and event spaces
• Educational, institutional and health care buildings
• Commercial buildings above a state-specific floor area or height limit
• Multi-family buildings above a set number of units

Here is a real example. On a recent Certificate of Occupancy plan set in California for a tenant space with a mezzanine, the city plan checker classified the use as an assembly occupancy and asked for a California-licensed architect to sign the architectural sheets, while the engineering stayed with the engineer. Checking the occupancy classification before drawings start avoids that extra review cycle.

Can a PE do architecture that is incidental to engineering?

Several states allow an engineer to perform architectural work that is incidental to an engineering project, and allow architects to perform incidental engineering in the same way. A common example is an industrial platform or equipment building where the main design problem is structural and the architectural content is small.

What counts as incidental is defined state by state, sometimes in the statute and sometimes in board rules or opinions. When a project sits near the line, the safest approach is to confirm with the building official before the drawings are prepared.

Civil engineer vs. structural engineer

In most states the license is simply “Professional Engineer”. The engineer chooses a discipline when taking the exam, and the board expects them to practice only in areas of competence. Civil engineers who specialize in structures routinely design and seal structural drawings for houses, additions, retaining walls and ordinary commercial buildings.

A few jurisdictions go further and require a separately licensed Structural Engineer (SE) for some work:

• Illinois licenses structural engineering separately, and structural design of buildings generally requires an SE.
• Hawaii requires an SE for buildings above set size and height thresholds.
• California requires an SE for the structural design of public schools and hospitals.
• Some other states require an SE for “significant structures” such as tall or high-occupancy buildings.

For a typical residential or light commercial project, a civil or structural PE licensed in your state is what the building department expects. See our structural PE stamp service for what that review includes.

What about mechanical, electrical and plumbing sheets?

MEP sheets follow the same principle. In most states a mechanical or electrical system should be sealed by an engineer competent in that discipline, usually a mechanical or electrical PE. California goes further and restricts civil, electrical and mechanical engineering to engineers licensed in those specific branches.

So a coordinated commercial set often carries several seals: architectural by an architect where required, structural by a civil or structural engineer, and MEP by mechanical and electrical engineers. Our MEP PE stamp and architectural drawing stamp pages explain how we match each sheet to the right licensee.

How to find out what your project needs

1. Read the plan-check comment or permit checklist. Many departments state exactly which sheets need a seal and by whom.
2. Identify the occupancy and size. Single-family, accessory, commercial, assembly or industrial, plus floor area and height.
3. Ask the building official if the project is near a threshold, such as a mezzanine that adds occupant load.
4. Send us the details. We will tell you which seals your set needs before you pay for anything.

If you already have drawings from a designer, our third-party review and stamp service checks them and seals the parts an engineer is allowed to seal in your state.