# How do you build a fence on a slope? > Building a fence on a sloped yard in Johns Creek: racked vs stepped sections, which materials can follow a grade, gaps for dogs, drainage and swales. URL: https://uprightjohnscreekfencing.com/guide/fence-on-a-slope/ Learn Two ways: racked, where the rails follow the grade, or stepped, where level sections drop at each post. The material and the dog usually decide which. Last Updated: November 5, 2026 There are two ways. A racked fence tilts its rails to follow the grade while posts and pickets stay vertical, so the bottom of the fence runs parallel to the ground. A stepped fence uses level sections that drop at each post, like a staircase, leaving a triangle of open space under the downhill end of each section. Wood can be built either way. Many aluminum panels rack within a limit. Most vinyl privacy panels must be stepped. [Upright Johns Creek Fencing](https://uprightjohnscreekfencing.com/) builds fences on sloped lots across north Fulton, where many backyards fall toward a creek, a swale or a detention pond. This guide explains how each method works and when to use it. ## Racked fences On a racked fence, the rails run at the same angle as the ground. Posts stay plumb and pickets stay vertical, but the tops and bottoms of the boards follow the slope. The result is a fence with a consistent gap under it, which matters for dogs and for looks. Wood is the easiest material to rack, because each rail and board is cut and fastened on site. Chain link fabric follows grade naturally. Many aluminum panels are made to rack within a rated amount; beyond it, they are stepped or custom-made. The top line of a racked fence follows the ground, so on a lot that rolls up and down, the top line rolls too. ## Stepped fences A stepped fence keeps each section level, so the top line looks like a series of steps. The post at each step carries a section that is taller on the downhill side. This suits rigid panels, such as most vinyl privacy and some ornamental styles, and it suits buyers who want a crisp, level top line. The tradeoff is the gap. On a steep slope, the triangle under the downhill end of each section can be large enough for a dog to get through, or a small child. It also lets light and views through on a privacy fence. ## Which materials can follow a grade - **Wood:** racked or stepped, cut to fit. The most flexible on uneven ground. - **Chain link:** follows the grade almost automatically; the fabric stretches along the slope. - **Aluminum:** many panels rack within a rated limit; steeper runs are stepped. - **Steel:** some panels rack, but steel’s stiffness makes on-site adjustment harder. - **Vinyl privacy:** usually stepped. Some picket and semi-privacy styles rack slightly. The [wood vs vinyl guide](https://uprightjohnscreekfencing.com/guide/wood-vs-vinyl-fence/) and the [aluminum vs steel guide](https://uprightjohnscreekfencing.com/guide/aluminum-vs-steel-fence/) compare those materials on other points. ## Closing gaps for dogs On a stepped fence, the gaps are usually filled. Common fixes include a treated board or cut wood panel under each step, landscape timbers, block or a strip of welded wire buried along the bottom. On a wood fence, racking the section often removes the gap in the first place. Diggers need a buried barrier whichever method is used. The [dog fence guide](https://uprightjohnscreekfencing.com/guide/best-fence-for-dogs/) covers escape routes in more detail. ## Rolling ground Many lots are not a single smooth slope. They dip at a swale, flatten, then rise again. Here, a mix often works best: racked sections through the dips and stepped sections where the grade is steady. On wood fences, each section can be cut to its own angle. With panel systems, the posts are laid out to put steps where the ground changes, and the installer checks each panel’s racking limit before ordering. ## Posts on a slope The downhill side of each post has less soil in front of it, and stepped sections put more load on the post at each step. Posts on a grade are often set slightly deeper, and gate posts on a slope get extra attention. The [post depth guide](https://uprightjohnscreekfencing.com/guide/how-deep-should-fence-posts-be/) explains how depth is chosen. ## Gates on a slope A gate that swings uphill hits the ground. Gates on slopes are usually placed on the flattest spot available, hung to swing downhill or outward, or built with a bottom edge cut to the grade. Wide drive gates on a slope may need a slide or a split pair. The [gate installation page](https://uprightjohnscreekfencing.com/gate-installation/) covers hinges and swing direction. ## Drainage and swales Water runs downhill along a fence line. A solid fence across a swale can act like a dam, collecting leaves and debris and pushing water around its ends. Fences across drainage paths are usually built with an open bottom or a gap at the low point, and the posts are kept out of the water’s path where possible. In many subdivisions, swales and ponds sit inside drainage [easements](https://uprightjohnscreekfencing.com/guide/fence-on-an-easement/), where the city or HOA may limit what can be built; the [Johns Creek permit guide](https://uprightjohnscreekfencing.com/guide/johns-creek-fence-permit/) explains the review. ## Height on a slope Height rules are measured from the ground, and on a stepped fence the downhill end of each section can be taller than the uphill end. Some codes and HOAs measure at the average, and some at the highest point. A section that is 6 feet tall on the uphill side may stand taller at the downhill post. Ask the building department or HOA how they measure before ordering panels. ## How to decide Choose racked when the gap under the fence matters, for dogs, small children or privacy, and when the material allows it. Choose stepped when the panels are rigid or a level top line matters more than the gap, then plan how to fill the triangles. On rolling ground, combine the two. The [fence installation page](https://uprightjohnscreekfencing.com/fence-installation/) covers how a job runs, and questions about a specific yard can go to the number at the top of the page or the form below. Slopes also change price; the [fence cost guide](https://uprightjohnscreekfencing.com/guide/fence-installation-cost/) explains why. ## Questions about this guide ### Can vinyl privacy fence be racked to follow a slope? Most vinyl privacy panels cannot. They are rigid and are installed in level steps. Some semi-privacy and picket styles allow limited racking; the manufacturer's specifications say how much. ### How do you close the gap under a stepped fence? Common fixes are a treated board or a cut wood panel below each step, landscape timbers or block, or a wire apron. On wood fences, racking the section instead often avoids the gap altogether. ### Does a fence on a slope cost more? Usually somewhat, because racking and cutting take more labor, stepped sections need taller posts at each step, and gap fillers add material. Steep or uneven ground costs the most. Want this answered for your own yard? A site visit shows what the line, the slope and the rules mean for your fence. Call (678) 509-2926 ## More guides Learn How deep should fence posts be? Deep enough to resist the load the fence puts on them. Height, wind, gates and the soil all change the answer, so posts on one fence are not all the same depth. Decision Guide What is the best fence for dogs? The one built for how your dog escapes. Jumpers need height, diggers need a barrier below grade, and barkers do better behind a fence they cannot see through. Decision Guide Wood vs vinyl fence: which is better in Georgia? Wood costs less to install and repairs easily; vinyl skips staining but cracks on impact and is not allowed everywhere nearby. The right answer depends on your lot. Decision Guide Aluminum vs steel fence: which should you choose? Aluminum for most yards, pools and slopes because it does not rust; steel where strength matters most, such as long driveway gates and security. Learn Can a fence be built on an easement? Sometimes, with permission and with the risk that it may have to come out. What drainage and utility easements mean for a fence line.