Someone has looked at your foundation and written down what they think should happen. Maybe it’s a line in a home inspection report. Maybe it’s a contractor’s proposal, or a letter from an engineer. Now you’re holding a recommendation and wondering whether it’s the right one.
Asking for a second look is reasonable. This post covers when a second opinion makes sense, who in California can actually give one, what to hand the second reviewer, and how to compare two sets of findings without getting lost. It’s written for homeowners in La Jolla citywide, and it stays on the decision itself, not on pricing.
Two of our other posts sit right next to this one. Questions to ask a foundation company covers interviewing a contractor before you hire. How inspections inform repair scope walks from inspection to scope, including what to do when a recommendation feels out of proportion and how to line up two proposals by scope. This post focuses on the second opinion as a process.
When a second look makes sense
There’s no rule that says you need one. But some situations make it worth the time:
- The recommendation came from a report that isn’t a structural analysis. California law defines a home inspection as “a noninvasive, physical examination” meant “to identify material defects.” A home inspection report can include “recommendations for evaluation by appropriate persons.” If your report says something like further evaluation recommended, that’s a referral, not a repair design.
- The cause isn’t explained. A recommendation that says what to build but not why the foundation moved leaves a gap. A repair aimed at the wrong cause may not hold.
- The document says it’s not final. California’s engineering law says interim documents “shall include a notation as to the intended purpose of the document, such as “preliminary,” “not for construction,” “for plan check only,” or “for review only.”” If you see one of those labels, you’re looking at a draft stage.
- The person recommending the work is also the one who would do it. That’s not wrong in itself, but an independent look can confirm the diagnosis.
- The scope seems large or small relative to what you’ve seen. Either direction is worth a question.
- Two people have already told you different things. Then you need a way to compare them, and the rest of this post covers how.
Who can give a second opinion
The answer depends on what question you’re asking. Different professionals are allowed to answer different questions.
A home inspector
Home inspectors look for defects and point to who should look further. California law is clear that the home inspection chapter does not allow “home inspectors who are not registered engineers to perform any analysis of the systems, components, or structural integrity of a dwelling that would constitute the practice of civil, electrical, or mechanical engineering”. Industry standards say the same thing in their own words. The American Society of Home Inspectors’ standard says the inspector shall “inspect structural components, including the foundation and framing,” but is not required to “Provide engineering or architectural services or analysis.” or “Offer an opinion about the adequacy of structural systems and components.” InterNACHI’s standard says its inspectors are not required to “report on the adequacy of any structural system or component.”
So a second home inspection can confirm what’s visible. It won’t settle whether a repair design is right.
A contractor
A licensed contractor can tell you what they see and what they would build. That’s useful, especially for practical questions like access and sequencing. It’s still a builder’s view. The Contractors State License Board suggests checking a license before relying on anyone, and warns: “Seeing a license number doesn’t necessarily mean the license is valid.” Our foundation repair page explains how contractors and engineers divide the work on a repair.
A licensed civil or structural engineer
When the question is why the house moved and what repair fits, that’s engineering. California’s Business and Professions Code §6731 says civil engineering covers work connected with “foundations, grading, framed and homogeneous structures, buildings,” including “The investigation of the laws, phenomena and forces of nature.” and “The preparation or submission of designs, plans and specifications and engineering reports.”
Titles are regulated too. Under §6736, no one may use the title “structural engineer” “unless he or she is a licensed civil engineer in this state and unless he or she has been found qualified as a structural engineer according to the rules and regulations established for structural engineers by the board.” Our PE, SE and contractor roles in California post goes deeper on titles, and our structural engineer page covers how engineering fits into a repair.
A geotechnical consultant
If the disagreement is about the soil (whether it’s expansive, whether there’s fill, whether a slope is moving), the second opinion may need to come from a geotechnical professional. Our geotechnical reports explained post covers who signs soils reports in California.
Check before you rely
Whoever you choose, verify the license. The California Board for Professional Engineers, Land Surveyors, and Geologists (BPELSG) suggests using its website to “verify that the professional is currently and properly licensed” and to “find out if there have been any complaints or disciplinary actions taken against the person’s license.” It also suggests asking: “Does the person have the background and experience to do the specific type of engineering or land surveying that your project requires?”
What engineers’ own rules say about reviewing someone else’s work
Engineers have professional norms around second opinions. The National Society of Professional Engineers’ Code of Ethics, a professional society code rather than California law, says: “Engineers in private practice shall not review the work of another engineer for the same client, except with the knowledge of such engineer, or unless the connection of such engineer with the work has been terminated.”
In practice, that means a second engineer may want to know whether the first engineer is still working for you, and may let the first engineer know about the review. That’s normal. It’s not a sign anyone is in trouble.
The same code says “Engineers shall be objective and truthful in professional reports, statements, or testimony,” and allows them to express “technical opinions that are founded upon knowledge of the facts and competence in the subject matter.” A good second opinion is built on the same facts, not on a hunch.
The City of San Diego has a formal version of this for soils work. When a geotechnical consultant changes after a permit is issued, its Guidelines for Geotechnical Reports say “The new geotechnical consultant must prepare a Transfer of Geotechnical Responsibility letter.” If the new consultant relies on the earlier work, they “must state that they agree with the data, recommendations and conclusions contained in those reports.” Or, in the guidelines’ words: “Alternatively, the new geotechnical consultant must conduct their own independent geotechnical investigation.” That’s a useful model even outside a permit: a second reviewer either adopts the first set of data or gathers their own.
What to bring to the second reviewer
A second opinion is only as good as the information behind it. Before the visit, gather:
- The first report, letter or proposal, with every page and any drawings.
- Any geotechnical or soils report for the lot.
- Floor elevation surveys or crack measurements, with dates.
- Your own photos of cracks, doors or walls, with dates.
- Permit history and plans for past work on the house.
- Disclosure documents and the home inspection report if you bought recently.
- A short written timeline: when you first noticed the problem, and what’s changed since.
BPELSG’s consumer guide encourages exactly this kind of paper trail: “Don’t be afraid to ask questions, request copies of documents, or ask for schedules for completion of services, during any stage of your project.” It also notes “The law requires all licensed engineers and land surveyors to use a written contract when providing their professional services,” and that the contract must include “A description of the services to be provided”. Make sure the second reviewer’s written scope says what question they’re answering. Review the first engineer’s recommendation is a different job than evaluate the foundation from scratch.
How to compare two sets of findings
When the second opinion arrives, don’t start with the bottom line. Read both documents side by side and sort what each one says into a few buckets.
Observations. What did each person actually see or measure? Cracks, elevations, moisture, soil conditions. If one reviewer measured floor elevations and the other didn’t, that’s a real difference in evidence, not just in opinion.
Cause. What does each one say made the house move? Settlement, expansive soil, drainage, slope movement, a framing problem? Two reports can agree on symptoms and disagree on cause. The cause is what the repair has to answer.
Assumptions. What did each one assume without testing? Soil conditions, depth to firm ground, how the house was originally built. Look for words like assumed or presumed, or a note that no soils report was available. An assumption isn’t a flaw, but it’s where two opinions can split.
Data gaps. Does either report say more information is needed? A recommendation for more testing is useful information, not a dodge.
Status of the document. Is it signed? Is it marked preliminary? Under §6735, civil engineering reports “shall be prepared by, or under the responsible charge of, a licensed civil engineer and shall include his or her name and license number.”
Scope. Only after the first five buckets, compare what each recommends doing and where. Our inspection-to-scope post has a side-by-side approach for that step.
When the two opinions disagree
Disagreement doesn’t mean one person is wrong. It may mean they had different information. A few ways to work it through:
- Share the findings. Ask each reviewer to respond in writing to the other’s observations and stated cause. With the first engineer aware of the review, this fits the NSPE line quoted above.
- Ask what would settle it. If they differ on soil, a soils investigation may be the tiebreaker. If they differ on whether movement is ongoing, dated measurements over time may answer it.
- Don’t pick by the smaller scope alone. The smaller recommendation may be right, or it may be aimed at a symptom. Lean toward the one whose stated cause has the best evidence behind it.
- Keep the record. Hold onto both reports. If you sell, or if more work comes up later, the history helps.
A foundation inspection or structural inspection visit can be a good starting point for collecting the observations both reviewers will rely on.
Questions worth asking
- What exactly did you observe and measure, and what did you assume?
- What do you think caused the movement, and what evidence supports that?
- Do you agree with the first report’s observations, even if you disagree with its conclusion?
- Is there any testing or monitoring that would change your recommendation?
- Is this document final and signed, or preliminary?
- Are you a licensed civil or structural engineer, and can I see your license number?
Where we fit
We’re a foundation and structural repair company serving La Jolla citywide. We can visit, document what the house is doing, and help you organize the papers and photos a second reviewer will need. We aren’t engineers, and we don’t sign engineering reports or review another engineer’s design. We work with verified contractors and coordinate with licensed engineers as needed. This post is general education, not an assessment of any property.
Next step
If you’re holding a foundation recommendation and want a second look at what the house is doing, request a Free Quote for an on-site visit anywhere in La Jolla, or call (650) 739-6537.
Sources (accessed October 30, 2026)
- California Business and Professions Code §§6731, 6735, 6736, 7195, 7196.1, via California.Public.Law
- California Board for Professional Engineers, Land Surveyors, and Geologists, A Guide for Consumers
- Contractors State License Board, How do I find the right licensed contractor?
- American Society of Home Inspectors, Standard of Practice
- InterNACHI, International Standards of Practice for Performing a General Home Inspection
- National Society of Professional Engineers, Code of Ethics for Engineers
- City of San Diego, Guidelines for Geotechnical Reports (2008)