Structural engineering · Pasadena, CA

Structural Engineering Services in Pasadena, CA

Connect with engineering firms serving Pasadena and the greater Los Angeles metro area. Common work runs from load-bearing wall removals and ADUs to soft-story retrofits, hillside foundations and more.

Also searched as: residential structural engineer Pasadena CA · stamped structural calculations Pasadena · Pasadena ADU structural engineer · Pasadena soft-story retrofit engineer · structural engineer near me Pasadena

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Local code & loads

Pasadena building code & ASCE 7 design loads

Pasadena enforces the 2025 California Building Code (CBC), based on the 2024 IBC, with City of Pasadena amendments. Stamped calculations submitted for permit reference the design parameters below.

Values shown for reference only — project-specific values from the ASCE 7 Hazard Tool should be used for engineering design at the actual project address.

ASCE 7 design parameters

Default values used for most residential and light-commercial projects in Pasadena. Site Class and seismic spectral values may shift based on geotechnical investigation.

Building code	2025 California Building Code (CBC), based on the 2024 IBC, with City of Pasadena amendments
ASCE 7 edition	ASCE 7-22
Seismic Sₛ	2.36g
Seismic S₁	0.77g
Site class	Default
SᴅS	1.65g
Sᴅ₁	1.17g
Seismic Design Category	E
Ultimate wind speed	95 mph
Ground snow load	0 psf

Risk Category II assumed for typical residential and light commercial use — confirm with your engineer if the occupancy or use may require a higher category.

Pasadena sits right against the San Gabriel Mountains and the Sierra Madre Fault, which makes it one of the higher-seismic spots in the metro, with many sites in Seismic Design Category E. The foothill setting also brings landslide and debris-flow exposure, and post-fire conditions in the canyons can raise that risk. The values below are regional placeholders only. Always pull site-specific values from the ASCE 7 Hazard Tool (https://ascehazardtool.org) for the actual project address.

Common projects engineers design in Pasadena

The work engineers handle frequently in Pasadena and the surrounding Los Angeles County.

Load-bearing wall removals and open-concept remodels
Accessory dwelling units (ADUs) and garage conversions
Soft-story seismic retrofit (mandatory ordinance)
Hillside foundation design and retaining walls
Room additions and second-story additions
Debris-flow and slope mitigation structures
Deck, balcony, and outdoor living structures
Rooftop solar array structural verification

What's different about Pasadena

Local conditions that affect structural design

City-specific factors that show up in many Pasadena calculations — and the things plan reviewers look for.

Pasadena's proximity to the Sierra Madre Fault and the San Gabriel Mountains puts it in a very high seismic setting. Many sites land in Seismic Design Category E, so lateral systems and connections carry a lot of the design effort.

The city has a mandatory soft-story retrofit ordinance with set compliance deadlines, so older multi-unit wood-frame buildings with weak ground floors are a steady source of screening and retrofit work.

The foothill terrain brings landslide and debris-flow exposure, and that risk can spike after wildfires in the canyons above town. Hillside projects often need drainage, terracing, and retaining design alongside the foundation.

Engineered grading is required for a range of hillside and larger projects, with civil-engineer supervision and a geotechnical or engineering-geology report.

ADUs are common across Pasadena's neighborhoods, including older lots where conversions need foundation and framing upgrades.

Permits

Where to submit your Pasadena permit

Stamped calculations from clearspan are submitted directly to the City of Pasadena Building Division, Permit Center. Most residential structural submittals are reviewed online.

Building department

City of Pasadena Building Division, Permit Center

175 N Garfield Ave, Pasadena, CA 91101

(626) 744-4200

Visit the building department →

Submittal notes

Pasadena's Permit Center enforces the California code with local amendments and runs a mandatory soft-story retrofit ordinance for older wood-frame buildings. Hillside and large grading projects require civil-engineer supervision and geotechnical or engineering-geology reports. Confirm the jurisdiction for the project address before submitting.

FAQ

Structural engineering in Pasadena — FAQs

The questions Pasadena contractors and homeowners ask most often.

Do I need an engineer to remove a wall in my Pasadena home?+

If the wall is load-bearing, stamped structural calculations from an engineer will help you avoid plan-review comments and keep the Pasadena permit moving.

Does Pasadena's soft-story ordinance apply to my building?+

Pasadena's mandatory program generally covers older multi-story wood-frame buildings with soft or weak ground floors, and it sets deadlines to screen, design, and complete the retrofit. An engineer can confirm whether a building qualifies and design the upgrade.

How quickly can I get stamped calculations for a Pasadena permit?+

Most residential beam and wall-removal calculations are turned around within a few business days through clearspan's process. Timelines depend on scope, and availability of an engineer to review and accept the design through clearspan.

Nearby cities

Structural engineers in other Los Angeles Metro cities

Browse city pages for nearby jurisdictions.

Glendale, CA→Long Beach, CA→Los Angeles, CA→Bakersfield, CA→Citrus Heights, CA→Clovis, CA→

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