Hillside Homes: What You Need to Know Before You Build

Los Angeles is full of dream-worthy hillside views, but building on a slope takes more than a great design. From soil conditions and retaining walls to strict hillside ordinances, it’s a complex process that demands strategic planning and technical precision.

At Dana Structural, we’ve worked on dozens of hillside properties across the South Bay, San Fernando Valley, and beyond. Here are a few of the most important considerations if you're planning a project on a slope:

1. Know the Local Code

Hillside areas in Los Angeles are governed by specific zoning regulations, often referred to as the Hillside Ordinance. These rules affect everything from how high you can build to how much grading is allowed. City requirements vary by lot, so it’s important to work with a team familiar with the jurisdiction.

2. Foundation Design Is Everything

On flat lots, a slab or shallow foundation might work. But hillside homes typically require deepened footings, caissons, grade beams, or retaining wall systems—especially if there's a risk of soil movement. We tailor every structural plan to the site’s unique topography and soil report.

3. Soil Reports & Slope Stability

A geotechnical report is often required before any drafting begins. This report evaluates slope stability, drainage, and compaction—critical for hillside safety and permit approval. We can help coordinate this step early so you don’t lose time down the road.

4. Construction Access & Cost

Sloped lots can increase construction complexity and cost. From staging materials to hillside excavation, it’s vital to factor in logistics early. We work closely with builders to ensure your structural plans are not only code-compliant—but buildable.

5. Collaborate Early

When it comes to hillside homes, early coordination between the architect, structural team, and geotechnical engineer can prevent rework and streamline approvals. We’re here to provide guidance during the early design phase, long before permits are submitted.

Ready to Get Started?

If you're thinking about building on a hillside, we’re happy to take a look at your lot and discuss next steps. Reach out via our Contact Form or email us directly at hello@danastructural.com to schedule a free discovery call.