The Short Answer
A city building department typically requests a complete set of stamped engineering drawings, the supporting calculations that justify the design, clearly stated design criteria and code references, and documents that are coordinated across disciplines and with the architectural set. During plan review, the city may also request specific clarifications, additional calculations, special inspection provisions, or documentation to satisfy local amendments. The exact requirements vary by jurisdiction, but the underlying expectation is consistent: enough sealed, verifiable information for a reviewer to confirm the design meets code.
What Cities Commonly Require
Stamped Drawings for Each Discipline
The city expects sealed structural, mechanical, electrical, plumbing, and civil drawings as applicable — each carrying the stamp of a PE licensed in that discipline and in the project's state. Documents without a valid seal will not be accepted for the engineered scope.
Supporting Calculations
Reviewers frequently require the calculations behind the design: structural analysis and load combinations, HVAC and electrical load calculations, energy compliance documentation, and specialty computations. Calculations must agree with the drawings.
Design Criteria and Code References
Cities expect the documents to state the governing code edition, applicable loads (dead, live, seismic, wind, snow), occupancy classification, and other basis-of-design information. This tells the reviewer the assumptions the design rests on.
Coordinated, Complete Documents
The set should be internally consistent and coordinated with the architecture — no conflicts between disciplines, no missing details, and a complete load path. Incompleteness is the most common reason for comments.
Requests That Come Up During Review
Beyond the initial submittal, reviewers often request additional items: clarification of a detail, extra calculations to justify a decision, a revised sheet to resolve a conflict, or documentation showing compliance with a local amendment. Certain elements — particular structural connections, high-load systems, or seismic features — may require special inspection, which the documents must call out. Responding to these requests promptly and completely keeps the permit moving.
When It Applies
These requirements apply to essentially any permitted project with engineered scope. Larger projects and stricter jurisdictions tend to request more detailed documentation and more thorough calculations, while smaller scopes in lighter jurisdictions may require less. Confirming the specific submittal requirements with the local building department before design begins helps avoid surprises.
Frequently Asked Questions
Do all cities require the same documents?
No. The core expectations — stamped drawings and supporting calculations — are consistent, but formats, local amendments, and specific requirements vary by jurisdiction. We prepare to the local requirements.
Will the city talk directly to the engineer?
Often, yes. Reviewers may direct comments to the engineer of record, and a call or meeting can resolve interpretation questions. We engage with reviewers on our scope.
What is special inspection?
It's independent field verification of specific critical elements during construction, required by code for certain systems. The documents identify where it applies.