How to Build a Sloped Fence That Follows the Grade

Your lot slopes, but the neighborhood standard is a smooth, continuous slope—not stepped panels. You want the pickets cut at an angle to mirror the ground. Here are three field-proven methods:

Method 1: String Line & Chalk Cut (Cleanest Look)

1. Set posts, then install top, bottom, and mid rails.
2. Attach pickets plumb, checking every 4th–5th with a level.
3. Run a string from corner to corner (or grade-break to grade-break) along the picket tops.
4. Snap a chalk line, then cut all pickets along that line for a straight, sloped top edge.

Method 2: Ground-Following Block (Natural Undulation)

1. Cut a 2"-thick wood block.
2. Set each picket on the block as you move down the slope, moving the block each time.
3. Overlap the previous position slightly for consistency.
4. For smoother flow, use a longer block and set 3–4 pickets per placement.

Method 3: Level-As-You-Go (Most Forgiving)

Install rails, then plumb each picket individually with a level. Minor gaps at the bottom are invisible if you check alignment every few pickets.

Pro tip: A 4-ft level and a chalk reel cost $20 total. Cheaper than redoing a crooked fence.