Does a change of use always need an engineer?

It needs one when the new occupancy changes the live load, the ventilation, the electrical demand, or the fire protection, which is the common case. A use that stays in the same group with no construction may only need a zoning check.

Can you certify that my existing floor is strong enough?

Yes, when the existing framing can be identified from drawings or from a site visit’s photos and the capacity meets the new live load. If it does not, the sealed set shows the strengthening instead of a letter that the floor is fine.

Do you handle the architect’s code analysis?

We seal the engineering that analysis depends on. The architectural code summary and accessibility drawings stay with the architect unless drafting of those sheets is added to the scope.

How much does a change-of-use stamp cost?

The live quote follows sheet count, from $100 per sheet down to $25 per sheet. A structural letter is a small set. A full occupancy change with MEP is priced on all of those sheets.

Project types / Change of use

Change of occupancy, sealed for the new use

Changing a warehouse to a gym, a house to an office, or a shop to a restaurant changes the loads and the systems the code expects. AllPEStamp reviews that engineering and seals it with a professional engineer licensed in the project state.

Occupancy changes under the building code
Live load and egress structure checked for the new use
Mechanical and electrical brought up to the new occupancy
Engineer licensed where the permit is filed

Get a PE stamp quote

What actually changes with the use

The building code assigns a live load and an occupancy group. Storage that becomes assembly, or a residence that becomes a business, is often a heavier floor and a different exiting story. The engineer checks whether the existing structure can carry the new load and what, if anything, has to be added.

Accessibility, zoning, and the architectural code summary may sit with the architect of record. We seal the engineering sheets: structure, mechanical ventilation for the new occupant load, electrical load, and fire protection when that trade is in the permit. The quote says which of those are included.

Existing buildings, not a new code on the whole block

Most cities apply the existing-building code to a change of use, so the review is the upgrade the change triggers, not a full redesign of the building. Upload the existing drawings, the proposed use, the occupant load if you have it, and any plan-check comments that list the upgrades.

A change of use combined with a tenant improvement should be one set. Splitting them is how a floor gets designed twice.

Seal and price

Each discipline is sealed by the PE who reviews it. Pricing is by sheet count, from $100 per sheet down to $25 per sheet. A letter that says an existing floor works for the new live load is a short set. A restaurant change with a hood and a suppression system is not.

The quote shows turnaround before you submit. Final pricing is confirmed after plan review, because existing buildings hide structure the first upload does not show.

Disciplines on this project

These are the seals this kind of permit usually asks for. The quote lists only the sheets you upload.

FAQ

Does a change of use always need an engineer?: It needs one when the new occupancy changes the live load, the ventilation, the electrical demand, or the fire protection, which is the common case. A use that stays in the same group with no construction may only need a zoning check.
Can you certify that my existing floor is strong enough?: Yes, when the existing framing can be identified from drawings or from a site visit’s photos and the capacity meets the new live load. If it does not, the sealed set shows the strengthening instead of a letter that the floor is fine.
Do you handle the architect’s code analysis?: We seal the engineering that analysis depends on. The architectural code summary and accessibility drawings stay with the architect unless drafting of those sheets is added to the scope.
How much does a change-of-use stamp cost?: The live quote follows sheet count, from $100 per sheet down to $25 per sheet. A structural letter is a small set. A full occupancy change with MEP is priced on all of those sheets.