How much does a structural engineer cost in California?

Costs vary by project scope. A standard structural inspection typically ranges from $500–$1,500. Permit plan sets for residential projects start around $1,500–$5,000, depending on complexity.

How long does it take to get stamped engineering plans?

Most residential stamped plans are delivered within 24–72 hours. Complex commercial projects may take 1–2 weeks.

Do I need a structural engineer to remove a load-bearing wall?

Yes. California building code requires engineered plans for any load-bearing wall removal. A licensed structural engineer must design a beam and support system to safely carry the loads.

What is required for permit approval in California?

California building departments typically require stamped structural calculations and plan sets signed by a licensed Professional Engineer (PE). Specific requirements vary by jurisdiction.

Do you handle seismic retrofits?

Yes. We specialize in seismic retrofit engineering across California — including soft-story retrofits, cripple wall bracing, foundation bolting, and whole-structure earthquake strengthening.

What areas of California do you serve?

We serve all of California — including Los Angeles, San Francisco, San Diego, Sacramento, Orange County, San Jose, Riverside, Fresno, and surrounding areas.

Can you provide engineering for ADUs and granny flats?

Yes. We provide complete structural engineering for Accessory Dwelling Units (ADUs), including detached new builds, garage conversions, and attached additions.

How do I verify if a structural engineer is licensed in California?

To verify a California structural engineer's license, visit the BPELSG license search at search.dca.ca.gov and search by the engineer's name or license number. All California structural engineers must hold a Civil Engineer license with structural authority, licensed by the Board for Professional Engineers, Land Surveyors, and Geologists (BPELSG). California Licensed Engineers holds License #C 98780 — verifiable through the BPELSG search portal.

How to find a licensed structural engineer in California?

To find a licensed structural engineer in California: 1) Verify the engineer's license on BPELSG (search.dca.ca.gov), 2) Confirm they have structural engineering experience for your project type, 3) Check that they provide stamped and sealed plans, 4) Ensure they're familiar with your local building department's requirements, 5) Ask about their California Building Code expertise. California Licensed Engineers is a statewide firm with 7,000+ projects and License #C 98780.

Do I need a structural engineer for a home renovation in California?

Yes, you need a structural engineer for most home renovations in California that involve structural modifications. This includes load-bearing wall removal, room additions, second-story additions, ADU construction, garage conversions, foundation repairs, and seismic retrofits. California building departments require stamped structural plans from a licensed Professional Engineer (PE) for any work affecting the building's structural system. Cosmetic renovations (paint, flooring, cabinets) do not require engineering.

What are California structural engineering permit requirements?

California building permit requirements include: stamped structural drawings and calculations from a licensed Professional Engineer (PE), a completed building permit application, a site plan showing the structure's location, Title 24 energy compliance documentation, and (for hillside or certain foundation projects) a geotechnical/soils report. Plans must comply with the California Building Code (CBC). Specific requirements vary by city and county. Plan review typically takes 2–4 weeks.

What are the seismic design standards for California residential buildings?

California residential buildings must comply with the seismic design requirements of the California Building Code (CBC), which is based on the International Building Code (IBC) with California-specific amendments. Key standards include: ASCE 7 for minimum design loads, ACI 318 for concrete, AISC 360 for steel, and the California Existing Building Code (CEBC) for retrofits. Seismic design category is determined by site soil conditions and seismic hazard maps. Higher seismic zones (most of California) require more robust structural design including shear walls, moment frames, and foundation anchoring.

What is the cost of seismic retrofit for a home in Los Angeles?

The cost of a seismic retrofit for a home in Los Angeles ranges from $3,000 to $15,000 for engineering and construction combined. Engineering and stamped plans cost $2,000–$5,000. Construction costs $3,000–$10,000 for a typical single-family home with a cripple wall foundation. The California Brace + Bolt (CBB) program provides grants of $3,000–$19,750 for eligible homes, significantly reducing out-of-pocket costs. LA's mandatory soft-story retrofit ordinance applies to multi-family buildings with weak ground floors — those cost $20,000–$60,000+.

Best structural engineers for residential projects in California?

When choosing a structural engineer for residential projects in California, look for: a valid BPELSG license, experience with your specific project type (ADU, wall removal, foundation, seismic), knowledge of your local building department's requirements, stamped and sealed plan delivery, and a track record of permit approval. California Licensed Engineers has completed 7,000+ residential projects statewide with License #C 98780, serving all California cities and counties.

What does a structural engineer do?

Structural engineers design and analyze building structures to ensure safety, functionality, and code compliance. We create permit-ready plans, perform structural inspections, evaluate foundations, and design solutions for renovations, seismic retrofits, and new construction.

What is California Building Code and why does it matter for my project?

California Building Code (CBC) establishes minimum safety standards for all construction in California. All structural work must comply with CBC requirements. We design all plans to meet or exceed CBC standards and ensure approval by building departments statewide.

How much do structural engineering services cost?

Costs vary by project scope. Structural inspections typically cost $500–$1,500. Residential permit plans start around $1,500–$4,000+ depending on complexity. Commercial projects cost more. We provide a formal quote after reviewing your specific project.

How long does it take to get stamped engineering plans?

Timelines vary by project complexity and current workload. For standard residential projects, we work efficiently to deliver quality plans. For urgent needs, we offer rush delivery options. Contact us to discuss your timeline.

Do I need a structural engineer for load-bearing wall removal?

Yes. California law requires a licensed Professional Engineer to design the structural system for any load-bearing wall removal. Building departments require stamped and sealed plans. We calculate loads, design support beams, and provide plans for permit approval.

What is seismic retrofitting and who needs it?

Seismic retrofitting strengthens buildings to withstand earthquakes. Many California cities require retrofits for soft-story buildings, unreinforced masonry, and structures near fault lines. We design retrofits including soft-story bracing, foundation bolting, and cripple wall reinforcement.

What are the requirements for permit approval in California?

Building departments require stamped structural calculations and plan sets signed by a California-licensed Professional Engineer. Specific requirements vary by jurisdiction. We prepare comprehensive plans designed for expedited approval and include all required documentation.

Do you provide structural inspections?

Yes. We offer professional structural inspections for pre-purchase evaluation, damage assessment, and general condition review. You receive a detailed report with professional findings and recommendations for any needed repairs or reinforcement.

What areas of California do you serve?

We serve all of California statewide — including Los Angeles, San Francisco, San Diego, Sacramento, San Jose, Fresno, and all surrounding regions. We provide both on-site inspection services and remote engineering services throughout the state.

Can you help if the building department rejected my plans?

Yes. We review the building department's correction comments and address each issue professionally. We prepare revised plans engineered to meet all requirements and resubmit for approval. This is a common part of the permitting process we manage regularly.

Do you provide engineering for ADUs and home additions?

Yes. We provide complete structural engineering for Accessory Dwelling Units (ADUs), detached new construction, garage conversions, and attached additions. All designs meet code requirements and are prepared for permit approval.

What is the difference between a structural engineer and a general contractor?

Structural engineers design and calculate building systems for safety and code compliance. Contractors build based on plans. You need both — the engineer creates the design (plans), and the contractor executes it. We provide the engineering expertise.

How do soft-story buildings need to be retrofitted in California?

Soft-story buildings have weak ground floors (often open parking). California cities mandate retrofits. We design comprehensive retrofit systems that include perimeter bracing, connection upgrades, and foundation modifications to meet seismic safety codes.

What makes California Building Code different from national codes?

California Building Code is stricter than national codes in several areas — especially seismic requirements, soil conditions assessment, and coastal building standards. We specialize in California-specific requirements for all projects.

California Licensed Professional Engineers — Residential, Commercial & Industrial

Structural Engineer in California —
Plans, Inspections & Permits

Fast-track your building permits with expert engineering. Over 7,000 projects completed by California-licensed Professional Engineers — stamped plans, inspections, and seismic retrofits, with express inspection appointments and reports available within 24–72 hours.

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Seismic retrofit, ADU, foundation & load-bearing wall engineering
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Structural analysis and design for wall removal or modification.

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Engineered retaining wall design for hillside and grading projects.

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Our California licensed engineers handle every challenge — from permit corrections to complex structural analysis. Call to speak directly with an engineer about your specific situation.

Building department rejected your plans?

We review correction letters, redesign for code compliance, and resubmit until approved.

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Need permit plans fast for your contractor?

We deliver permit-ready stamped plans with engineering calculations for fast building department approval.

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Foundation concerns or structural damage?

We evaluate conditions and provide professional engineering analysis with recommended repair solutions.

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Load-bearing wall removal or modification?

We analyze the structure, design the beam system, and provide stamped plans required for permits.

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Seismic safety evaluation or retrofit needed?

We assess seismic vulnerability and engineer retrofit systems compliant with California seismic codes.

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From initial engineering analysis through final stamped permit plans, our California licensed engineers handle every aspect of your project. We serve homeowners, contractors, developers, investors, and commercial property owners across the state.

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Site Evaluation & Structural Assessment

Professional on-site inspection and evaluation of existing conditions, structural integrity, and project scope.

Engineering Analysis & Calculations

Complete structural analysis and engineering calculations for permit submission and code compliance.

Permit-Ready Plans & Stamped Drawings

Full plan sets signed and sealed by California-licensed Professional Engineers, accepted statewide.

Fast Permit Correction Support

We address building department correction letters and resubmit revised plans quickly to keep your project moving.

MEP & Structural Engineering

Full-service structural and MEP engineering support for residential, commercial, and industrial projects.

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Speak directly with engineers throughout your project — available for contractor questions and site coordination.

Client Testimonials

Trusted by Homeowners, Contractors
& Developers Across California

7,000+ projects completed. Hear from clients who spoke directly with our licensed California engineers.

"They connected us directly with an engineer and helped us get our permit approved quickly. Professional, responsive, and the plans were accepted on the first submission."

Michael R.

Los Angeles, CA

Residential Permit Plans

"Professional engineering plans and fast turnaround for our commercial project. Their team handled everything — calculations, permit plans, and even the revision. Highly recommend."

Sandra T.

San Diego, CA

Commercial Tenant Improvement

"Their engineering team handled our calculations, inspections, and permit revisions efficiently. We've worked with them on multiple industrial projects and they always deliver."

James L.

San Jose, CA

Industrial Facility Engineering

"Called and spoke with an actual engineer immediately — no runaround. They handled our foundation concerns and provided ADU plans that sailed through the building department."

Karen M.

Sacramento, CA

Foundation Inspection & ADU Plans

"Fast, professional, and easy to work with. The engineer explained everything clearly and our contractor had everything needed to complete the job on schedule."

David C.

Fresno, CA

Load Bearing Wall Removal

"Excellent experience from start to finish. They have deep knowledge of California requirements and made the seismic retrofit process straightforward and stress-free."

Lisa W.

Orange County, CA

Seismic Retrofit Engineering

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California-Licensed Professional Engineers

Every project is stamped and sealed by a California-licensed Professional Engineer (PE). Our credentials are verifiable through the California Board for Professional Engineers.

Dr. Emad Mousavi, PE

Founder and lead engineer — California Civil Engineer License #C 98780, licensed by the California Board for Professional Engineers, Land Surveyors, and Geologists (BPELSG), with PE licensure in multiple states.

All California engineering work is performed under the responsible charge of Dr. Mousavi, PE, in accordance with California law. Every plan and report is stamped and sealed by a licensed PE.

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7,000+ Projects Completed

Over two decades of experience with California Building Code (CBC), seismic design standards, and local permitting requirements across all 58 California counties.

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We serve every California city and county — from Los Angeles and San Francisco to San Diego, Sacramento, and beyond. Plans accepted by all California building departments.

All 58 counties served

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Engineering Led by Dr. Emad Mousavi, PE

Every project we deliver across California is performed under the responsible charge of Dr. Emad Mousavi, PE, founder and lead engineer. Dr. Mousavi holds California Civil Engineer License #C 98780 and maintains professional engineering licensure across multiple states, with 20+ years of experience in structural design, seismic engineering, forensic investigation, and permit-ready engineering documents.

California Civil Engineer License #C 98780 — verifiable with BPELSG
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Direct responsible charge of all California engineering work, per California law
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Engineering services are provided by California Licensed Engineers through licensed professional engineers under the responsible charge of Dr. Emad Mousavi, PE, in accordance with applicable California laws and regulations.

Dr. Emad Mousavi, PE

Founder & Lead Engineer

CA Civil Engineer License #C 98780

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7,000+ projects completed across 100+ California cities. Our engineers are familiar with local permitting offices, building departments, and jurisdiction-specific requirements.

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Structural Engineer in California —Plans, Inspections & Permits

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California's Trusted Engineering Authority — 7,000+ Projects Completed

Site Evaluation & Structural Assessment

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Trusted by Homeowners, Contractors & Developers Across California

California-Licensed Professional Engineers

Dr. Emad Mousavi, PE

7,000+ Projects Completed

Statewide California Coverage

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Frequently Asked Questions

How do I verify if a structural engineer is licensed in California?

How to find a licensed structural engineer in California?

Do I need a structural engineer for a home renovation in California?

What are California structural engineering permit requirements?

What are the seismic design standards for California residential buildings?

What is the cost of seismic retrofit for a home in Los Angeles?

Best structural engineers for residential projects in California?

What does a structural engineer do?

What is California Building Code and why does it matter for my project?

Structural Engineer in California —
Plans, Inspections & Permits

Residential, Commercial & Industrial
Engineering Services

Engineering Solutions for
Real California Projects

Trusted by Homeowners, Contractors
& Developers Across California

Local Engineering Expertise
Across California