19 August 2026
Anyone who has looked into garden steps in Melbourne for a narrow side passage knows the problem before the quote even lands. Most standard step solutions are designed for open garden beds with room to move, not a tight run between a boundary fence and the side of a house. When a block has a real change of level and next to no width to work with, the usual approach needs rethinking. That was exactly the situation on a recent job, a side access running down the length of a Melbourne home with a decent slope from front to back. The fix was a set of steel stair units, slim structural frames that hold the shape of the steps before anything else goes in on top. Why side access is its own problem Melbourne's inner and middle suburbs are full of period homes built long before anyone thought about side access as a design problem. Narrow gaps between the house and the boundary fence were left over space, not planned circulation. Somewhere down the track, that gap usually ends up as the main route to a garden shed, a bin store, a side gate, or the back garden itself. Add a natural fall in the block, which is common across large parts of Melbourne, and that narrow strip suddenly needs to manage a change of level as well as foot traffic. There is rarely room to spread a gentle ramp or a wide set of steps across the width available. Whatever goes in has to do its job in a fraction of the space a step in an open garden would use. This is where a lot of standard landscaping approaches run into trouble. A generously proportioned set of garden steps looks fine on paper, but in a passage that might only be 800mm to a metre wide, there simply is not room for a bulky structure on either side of the tread. Why steel stair units solve it The answer on this job was a series of steel stair units, welded steel frames set into the slope to form the risers and hold the structure of each step. Rather than pouring a full concrete stringer or building a masonry structure to support the steps, the steel frame does the structural work in a much slimmer profile. Poured concrete versus a steel frame A poured concrete step structure needs formwork, curing time, and enough width either side to build and finish it properly. In an open part of a garden that is rarely an issue. In a side access hemmed in by a fence on one side and a house wall on the other, it can eat into space that was never generous to begin with. A steel stair unit does the same structural job, holding soil and fill in place and defining the shape of each step, but it arrives pre-formed and goes into the ground far closer to the boundary than a poured structure could safely sit. For a narrow side access, that difference in footprint can be the difference between steps that fit comfortably and a passage that feels tighter than it did before the work started. Structure first, finish later What is visible in a job like this partway through is just the steel frame, sitting in raw soil with no surface finish yet. That is deliberate. The frame is the structural stage, get this right and everything that follows, backfill, base preparation and the finished tread surface, has something solid and correctly shaped to sit on. It is not the most photogenic stage of a landscape construction job. There is no paving, no planting, nothing that looks finished. But it is the stage that decides whether the steps sitting on top in a few months' time stay solid or start to shift, crack, or settle unevenly within a couple of years. What happens after the frame goes in Once the steel units are set and levelled, the next stages are backfilling behind and within each riser, compacting that fill properly, and building up a base ready for the finished tread. Depending on the brief, that tread might be paving to match the rest of the property, exposed aggregate, or another hard-wearing surface suited to a side access that gets regular foot traffic. Because the steel frame has already set the shape and pitch of the steps, this later stage is mostly about getting the base and finish right rather than fighting the structure itself. It also means changes to material or finish further down the track do not require touching the structural steps underneath. Drainage behind the steps matters just as much A narrow side access is often the path water takes off a roof, a driveway, or higher ground at the front of a block, especially once a fall has been built into it deliberately, as steps require. Water sitting against the back of a step structure, steel or otherwise, is one of the more common reasons steps in tight side passages fail early. Getting drainage right behind and beneath the steps, so water is directed away rather than pooling against the structure, is part of the same stage as backfilling and base preparation. It rarely gets a mention in a finished photo, but it is one of the details that separates steps built to last from steps that need attention again within a few wet Melbourne winters. Where garden steps fit into landscape construction A job like this rarely happens in isolation. Side access steps are usually one part of a broader landscape construction scope, connecting a driveway or street frontage to a rear garden, a pool area, or a renovated outdoor living space. Getting the structural stages right, steps included, is what the rest of a landscape construction project gets built on. It also overlaps with paving and hardscaping , since the finished tread on a set of garden steps needs to tie into whatever paving material runs through the rest of the property. Matching material, falls and finishes across steps and paving is what makes a side access feel like part of the property rather than an afterthought squeezed down the side of it. Timing also matters more than most homeowners expect. Structural work like a steel stair unit install is best done while a side access is already stripped back for a broader landscape construction or renovation project, rather than as a standalone retrofit once paving, planting and fencing are all finished and in the way. Where the two can be planned together, the steps end up better integrated and the job as a whole runs more efficiently. Getting it right the first time Steps in a high traffic side access take a beating over the years, weather, foot traffic, bikes and bins included. A structure that is undersized, poorly supported, or built without proper drainage behind it tends to show that wear early, with cracking, movement, or pooling water at the base. Starting with a proper structural frame, whether that is a steel stair unit or another engineered solution suited to the site, is what avoids that outcome. It costs more attention at a stage nobody will ever see finished, but it is exactly the kind of groundwork that keeps a side access looking and functioning the way it should for decades rather than years. Frequently asked questions Do all garden steps need a steel frame like this? No. A steel stair unit is one option among several for building garden steps, and it tends to suit tight, narrow sites where a poured concrete or masonry structure would take up too much space. Open garden areas with more room to work in often suit other structural approaches just as well. Can steel stair units be used on a sloped side access with existing fencing and services? Yes, that is a common scenario. Steel units are set into the slope in stages and can be positioned to work around existing fence lines, drainage points and other services already running through a side access, which is part of why they suit constrained sites. What happens to the raw steel frame, is it visible in the finished result? No. Once backfill, base preparation and the finished tread are complete, the steel structure is concealed beneath the surface. What is visible afterwards is the finished step, whether that is paving, aggregate or another chosen material. If a narrow side access at your own property has an awkward change of level, it is worth having someone look at the structural options before locking in a finish. Get in touch with the CHS team to talk through what a site like yours would need.