Civil Engineering Orange County, CA | Site Development & Stormwater

What We Engineer

Commercial site grading and earthwork design across Orange County jurisdictions
Stormwater management — OC WQMP preparation and BMP design
LID and hydromodification compliance for new commercial development
OC Flood Control District coordination and drainage design
Utility coordination across multiple OC utility agencies
California Coastal Commission permit coordination for coastal OC cities
ADA accessible site design and pedestrian improvements
Parking lot civil design — pervious pavement and underground detention
Multi-jurisdiction OC permit package preparation

Local Engineering Context

Authority Having Jurisdiction: City-specific AHJs across OC (Irvine, Anaheim, Santa Ana, and 31 others) / OC Flood Control District
Building Code: 2022 California Building Code with local amendments
Energy Code: N/A
Local Market: Orange County's biotech corridor (Aliso Viejo, Lake Forest), hospitality market (Anaheim Resort area), and active multifamily development generate sustained civil engineering demand; the OC Flood Control District's complex drainage master plans affect many development sites.
Climate & Engineering Conditions: Zone 3B coastal to zone 8 inland; coastal cities require BCDC-equivalent California Coastal Commission review; LID/green infrastructure requirements are enforced; some inland valley sites are in FEMA Zone AE along the Santa Ana River.

About Apex Grid Engineering

Apex Grid Engineering is a multi-discipline engineering firm with multi-state PE coverage confirmed per project and a business-provided operating and contact address in Queen Creek, Arizona. We provide structural, MEP, civil, and geotechnical engineering for commercial, industrial, multifamily, and government clients — with 15+ years of experience and a multi-discipline engineering team on staff.

We work from architectural PDFs, CAD files, or field measurements, and we're set up to turn projects around on compressed schedules when the situation calls for it.

Related services in Orange County: Structural Engineering · Mep Engineering

Orange County Civil Engineering Questions

What does Civil Engineering in Orange County include?

Orange County civil engineering navigates 34 separate municipal jurisdictions — each with its own site plan and grading requirements — plus the Orange County Flood Control District, South Orange County Watershed Management Area requirements, and the California Coastal Commission for coastal cities from Seal Beach to San Clemente.

Who reviews Orange County engineering permit documents?

City-specific AHJs across OC (Irvine, Anaheim, Santa Ana, and 31 others) / OC Flood Control District is the listed authority having jurisdiction for this service area. The exact reviewer and submittal path should be confirmed for the project address before design begins.

Which building and energy codes apply in Orange County?

The listed building-code basis is 2022 California Building Code with local amendments, and the listed energy-code basis is N/A. Project-specific amendments and effective dates should be verified with the permitting authority.

Ready to Start in Orange County?

Send us your drawings or describe your project and we'll respond within one business day.

Get a Proposal 480-490-0064