The easiest fence to draw is a straight horizontal line. Unfortunately, many yards were not consulted. A modest change in ground level can leave a surprisingly large opening below a level panel, or create a series of abrupt steps that looks busier than expected.
Both stepped and racked fences can work. The better choice follows the actual ground profile and the way you use the yard. Before choosing a style, measure the change in level along the proposed run and note where the slope changes direction. A single end-to-end measurement can miss a hump in the middle.
Know what the two methods change
With a stepped fence, each panel or section remains level and the next section sits higher or lower. With a racked fence, rails and infill are arranged to follow the grade within the limits of the system. Trex Fencing FDS describes both approaches, including the larger bottom gaps that can occur with stepping and the need to select a product capable of following the slope.
| Choice | Useful feature | Watch closely |
|---|---|---|
| Stepped | Level horizontal sections | Larger triangular bottom gaps |
| Racked | Closer visual fit to the slope | Product angle limits and connections |
| Mixed layout | Can handle changing terrain | Transitions and gate position |
A factory-made rigid panel may not rack at all. Another panel may rack only within a stated limit. A site-built wood fence offers flexibility, but that does not remove the need for sound post foundations and proper rail connections. Ask for the actual product detail rather than accepting 'we can make it slope' as a specification.
Draw the bottom edge, not only the top
Use a side elevation showing the ground, posts, top edge and bottom edge. Mark the largest opening beneath each section. If children or pets use the yard, assess those openings against their needs as well as any applicable enclosure rules. Pool fencing requires its own compliant detail; filling a gap with an improvised loose board is not a substitute.
Do not pile soil against timber boards to hide the openings. That changes moisture exposure and can obstruct a drainage route. Fence-board ground exposure and clearance remains important even when the slope makes the gap visually inconvenient. A designed lower infill may be possible, but it needs to preserve drainage and use suitable materials.
Stand where you actually sit. A stepped top may provide adequate privacy from one patio chair and expose the upper neighbour's seating area from another. It is worth checking this with a temporary string line or marked pole before committing to the entire run. The view from the kitchen window is not the only view that matters.
Keep the gate out of trouble
The gate is a moving rectangle in a sloping landscape. Draw its full sweep and check the highest ground beneath it. A fence that follows the hill beautifully can still leave a gate that opens only halfway. The solution may involve changing its position, swing direction or the local paving detail rather than trimming an increasingly large wedge off its bottom.
Our gate-on-rising-ground guide explains that conflict in more detail. Also allow for the clear opening needed by a mower, wheelbarrow or future equipment. Measure with the gate open, including hinges and stops, rather than relying on the nominal panel width.
Check height and posts independently
Fence height measurement is a municipal question. Toronto's fence rules use a defined grade-measurement method; do not assume that measuring from whichever side looks lower will satisfy every municipality. Show the slope and proposed fence to the local department when the interpretation is unclear.
Finally, ask how posts will be sized and supported where the drop is greatest. Longer exposed posts, wind exposure and erosion can change the design. A panel catalogue illustration does not establish the foundation detail for your hillside. Agree on the finished ground levels before the posts are set, then photograph the completed bottom clearances so later landscaping does not quietly undo the plan.