What decision does this guide help you make?
Use this guide to compare engineering proposals. Ask what is being investigated, what design method applies, what drawings will be produced and how field discoveries will be handled.
Use the 2026 cost guide with the decisions described on this page.
What is the practical sequence?
| Stage | Owner’s question | Useful output |
|---|---|---|
| Document | What exists and what is still unknown? | Measured existing-condition record |
| Analyze | Which local criteria and performance method apply? | Calculation basis |
| Coordinate | How do structure, parking and utilities interact? | Buildable design set |
| Observe | What must the engineer verify during work? | Observation and correction record |
FEMA P-807 is one published weak-story methodology, and local programs may also allow or require other code-based paths. The engineer must identify the method accepted by the responsible jurisdiction for this building. Do not select a method because a contractor uses it frequently.
Which records should be in one review file?
- available original drawings and previous calculations;
- field measurements, material observations and testing plan;
- open-front lines in both principal directions;
- diaphragm, collector, connection and foundation information;
- parking clearances, utilities, meters and fire/life-safety conflicts;
- design criteria, analysis output and calculation package;
- signed plan set, revisions and construction-phase services.
Where can a proposal become misleading?
A concept that preserves parking may add foundation or collector work. A wall-based concept may affect circulation or services. Existing stucco, plaster or sheathing may be considered differently under different methods. These are engineering decisions, not marketing features.
What should the written proposal state?
- responsible civil or structural engineer and license number;
- site investigation and testing included;
- design method and governing city guideline;
- number and type of concept options, if any;
- architectural, MEP and fire/life-safety coordination limits;
- plan-check responses and revision rounds;
- structural observation and field-change process;
- owner deliverables in editable and final formats.
How do local rules change the answer?
California’s BPELSG license lookup lets an owner verify the individual engineer and discipline. LADBS, Pasadena, Culver City, Burbank and West Hollywood publish their own program materials. Pasadena’s guidelines state that affected retrofit structures require structural observation during construction.
What can you do before the first site meeting?
Photograph both directions of the ground level, not only the most obvious opening. Mark columns, walls, stairs, meters, panels, piping and parking dimensions. Give the same record to each engineer and ask them to list missing investigation before quoting final design.
Frequently asked questions
Is a steel moment frame always required?
No. The engineer selects a compliant property-specific system. The viable options depend on the existing building and local criteria.
Who can perform the structural evaluation?
Use the jurisdiction’s rules and verify the responsible California-authorized civil or structural engineer through BPELSG.
Should engineering be included in the contractor price?
It can be packaged, but the engineer, scope, design deliverables, revisions and construction-phase duties must remain explicit.