Design · Pasadena & Los Angeles
Civil engineering for
complex California sites.
Grading, drainage, and site development engineered to satisfy the city and protect your investment — especially on challenging lots.
Overview
Turning a difficult site into a buildable one.
Our civil engineering addresses how your project meets the land: grading, drainage, utilities, and stormwater. Done right, it prevents problems that are expensive to fix later.
We coordinate civil work with architecture and structural design and manage the agency approvals that complex Los Angeles and hillside sites demand.
What's Included
Site engineering, handled end to end.
Grading & Earthwork Plans
Cut/fill design that balances cost, code, and stability.
Drainage & Stormwater
Compliant drainage and low-impact development design.
Utility & Site Layout
Coordinated water, sewer, and site infrastructure.
Agency Approvals
We manage civil submittals and city coordination.
Why ATP
One accountable team,
start to finish.
Solve the site first.
Have a tricky lot? Our civil team helps you understand what’s possible before you commit.