Fence Height on a Slope: How LA Actually Measures "6 Feet"

Los Angeles generally allows fences up to 6 feet in rear and side yards without a permit, and lower heights in front yard setbacks. That sounds straightforward until your yard isn't flat — and in Woodland Hills, a lot of yards aren't.

Why "6 Feet" Gets Complicated on a Slope

Height is measured from grade at the base of the fence, not from some fixed reference point across the whole property. On a sloped lot, that means the "allowed height" can change from one end of a fence run to the other. A fence that follows the slope (stepped or raked) is typically measured at each post, using the grade directly beneath it. A fence built level and horizontal across a sloped grade can end up taller than 6 feet at the low end, even if it started at 6 feet at the high end — and that's the version that draws code enforcement attention or a stop-work notice from LADBS.

Retaining Walls Make It More Complicated, Not Less

If your slope has a retaining wall — common throughout Woodland Hills hillside tracts — height is often measured cumulatively, wall plus fence, once you're within a certain distance of the wall face. LADBS and LA County building code both have rules about combined wall-and-fence height in this situation, and the details depend on the setback from the wall and how the grade is configured on each side.

This is one of the more frequently misunderstood rules on hillside lots: a homeowner adds "just a 6-foot fence" on top of an existing 4-foot wall and ends up with a structure that reads as 10 feet from the low side — over the limit and potentially subject to permit and engineering requirements neither the homeowner nor the fence crew anticipated.

Daylight and Top-of-Slope Setbacks

Graded hillside lots often have a daylighting easement or a required setback from the top of a slope, separate from the standard fence height rules. Building a fence too close to a slope edge can violate this setback even if the fence height itself is compliant. This shows up a lot on newer hillside tract developments in the Valley, where grading plans define these setbacks explicitly.

What to Check Before You Build

• •Confirm the grade at each post location, not just at one point on the property
• •If there's an existing wall involved, ask whether wall + fence height is measured cumulatively
• •Check your lot's grading plan (if available) for daylighting or top-of-slope setback requirements
• •If in doubt, a quick call to LADBS or a site visit from your contractor before materials are ordered saves a possible teardown

Sloped-lot fencing isn't harder to build — it's harder to permit correctly. Getting the height measurement right at the planning stage is the difference between a smooth install and a fence you have to modify after the fact.

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