Licensed Professional Engineers serving Riverside and the Inland Empire region — providing pe-stamped engineering to legalize unpermitted additions, conversions, and structures. with court-ready, PE-stamped reports.
Unpermitted additions, garage conversions, patio covers, decks, carports, and retaining walls are common across Riverside — and they surface at the worst times: during a home sale, a refinance, an insurance claim, or a code-enforcement notice. Our CA-licensed Professional Engineers inspect the existing work, document it with as-built drawings and structural calculations, specify any required upgrades, and prepare the PE-stamped engineering package that California building departments typically require to close out an after-the-fact permit.
Local Experience
Dr. Mousavi is a California-licensed Civil Engineer (License No. C98780) serving owners, carriers, and counsel across the state. Our California work reflects the state's distinct risk profile: hillside and wildfire-exposure assessments in San Diego and Riverside counties, seismic-zone structural evaluations across Los Angeles and the Bay Area, and water-intrusion and drainage investigations in the Central Valley — every report built to California building code and litigation standards.
We serve Downtown Riverside, Corona, Moreno Valley, Temecula, and San Bernardino, and the greater Inland Empire region. Every report is PE-stamped, litigation-ready, and prepared for use in California insurance claims and litigation.
As-Built Field Verification
On-site measurement and inspection of the existing unpermitted construction.
Structural Calculations & Drawings
PE-stamped as-built plans and calculations for permit submittal.
Engineer Letters & Certifications
Sealed letters addressing structural adequacy of existing work.
Code Violation & Red-Tag Resolution
Engineering remedies and retrofit details to resolve code-enforcement notices.
Additions, Conversions & ADUs
Room additions, garage conversions, accessory dwelling units, decks, and patio covers.
Real Estate Closing Support
Fast-turnaround documentation when unpermitted work stalls a sale or refinance.
We have engineers on the ground in Riverside — not just a license on file. Rapid site response, local code knowledge, and court-ready reports.
California Civil Engineer License No. C98780 · since December 2025
24–72 hour site response
Court-recognized expert testimony
Common questions from Riverside clients
In many cases, yes. California building departments commonly accept PE-stamped as-built drawings, structural calculations, and an engineer's evaluation of existing work as part of an after-the-fact permit. We inspect the work, document it, specify any needed upgrades, and prepare the engineering package. Final permit approval is always made by the local building official.
Room additions, garage and attic conversions, accessory dwelling units, decks, balconies, patio covers, carports, removed or altered load-bearing walls, retaining walls, and commercial tenant improvements.
Not always. We start with a non-destructive inspection and only recommend limited openings when framing, connections, or footings cannot otherwise be verified.
Yes. Dr. Mir Emad Mousavi holds an active Professional Engineer license in California — California Civil Engineer License No. C98780, and our Riverside-based team understands CA building codes and local amendments. Our PE-stamped reports are accepted by California courts and insurance carriers.
We typically deploy local engineers within 24-72 hours across the Inland Empire region, with same-day availability for urgent structural emergencies in Riverside.
Pricing depends on the scope of the investigation, site access, and reporting requirements. We offer confidential consultations to scope your matter and provide a clear fee estimate — call (833) 511-2542 to discuss your case.
Yes. Our Riverside team serves Downtown Riverside, Corona, Moreno Valley, Temecula, and San Bernardino, and the greater Inland Empire region.
Yes. Dr. Mousavi provides expert witness testimony and deposition support in California state and federal courts, and our PE-stamped reports are litigation-ready.
Wind, water, hail, and structural storm damage investigation.
Foundation settlement, cracking, and structural distress investigation.
Building code compliance, workmanship, and defect investigation.
Structural fire damage assessment and safety evaluation.
Drainage failure, erosion, slope stability, and water intrusion.
Vehicle impact structural damage assessment.
Speak directly with a licensed forensic engineer about your after-the-fact permitting engineering matter in Riverside. All consultations are confidential.