A new shaft versus retrofit decision is rarely about the lift alone. It sets the builder’s-work scope, the available car size, where the controller sits, how people and goods move through the building during works, and how much uncertainty remains once construction starts. On a clear greenfield site, a purpose-built shaft is usually the cleaner path. In an existing commercial building, that option may still be practical, but the existing structure and daily operation will set the terms.
For developers, builders and facility managers, the useful question is not whether retrofit is inherently harder. It is what the building can give you without creating a chain of compromises around the lift.
New shaft versus retrofit starts with the operating model
Before looking at structure, establish who will use the equipment and whether a person travels with the load. This determines the type of lift being considered, the landing arrangement and the way the building needs to support it.
A multi-level self-storage facility where customers move their own trolleys has a different requirement from a warehouse where trained staff transfer pallets, or a retail tenancy where stock moves from a loading area to a lower-ground store. A goods hoist operated by an attendant can suit a controlled back-of-house operation. It may not suit a tenant-operated building where a staff member cannot be rostered to operate equipment whenever a customer needs it.
That decision should be made before the shaft is drawn. A shaft sized around one type of equipment may be restrictive if the operating model later changes. The same applies to door openings, landing clearances and the location of loading areas.
Apex Elevation’s starting point is to recommend the equipment against the actual operation, then work back to the structure and builder’s work. That avoids asking a project team to choose technical details before the core use case is settled.
A new shaft gives the project more control
A new shaft is generally simpler to coordinate because the lift requirements can be set before concrete, steel and walls are fixed. The builder can allow for the required pit, overhead space, landing openings, support points and controller location within the design rather than finding room for them later.
This does not mean a new shaft is automatically the lower-cost option. It adds construction scope. On some projects, especially where the building shell already exists, a structural shaft or a new external enclosure can be a significant package of work. The comparison changes when an internal retrofit requires extensive demolition, structural alterations, services relocation or prolonged access restrictions.
The main advantage of a purpose-built shaft is control over geometry. Lift guide rails rely on the shaft structure staying within the required alignment over the full travel. Rails that are fixed to walls or steelwork which move, twist or step out of line create work for the installer and can affect operation over time. A shaft designed around the rail brackets and landing interfaces gives the builder a clearer target.
It also makes the finishes easier to resolve. The builder can coordinate lintels, jambs, sills, bulkheads and fire or acoustic treatments around known landing openings. The lift contractor can then install doors into openings that are square, complete and ready for the specified threshold detail.
Design the shaft around the load path
A shaft does not need to be oversized, but it needs to reflect the loads that will actually pass through it. A pallet on a pallet jack, a roll cage, a linen trolley and a self-storage trolley all behave differently at a landing. The car dimensions are only part of the issue. The approach, turning space, door width and threshold transition decide whether the equipment works without repeated impacts to doors and finishes.
This is where a standard plan can become expensive. A lift that fits within a nominal shaft dimension may still be poorly placed if the loading route forces a sharp turn at every landing or sends trolleys across a public corridor.
Retrofit work is an interface exercise
Retrofitting a lift into an existing building can be the right answer. It makes sense where there is no practical location for a new internal shaft, where an unused void can be converted, or where an external structure provides a direct route between levels. The building may also need the lift to be introduced with minimal change to occupied tenancies.
The trade-off is that the building has already made many of the decisions. Floor slabs, beams, columns, services, fire compartments, ceiling heights and access routes are fixed conditions. The lift design must respond to them.
The first site investigation should focus on what is physically present, not only what appears on old drawings. We look at floor-to-floor dimensions, slab edges, the likely structure behind walls, existing openings, drainage, services and access for installation. A concealed beam above a proposed opening, for example, can change the landing detail. So can a hydraulic line, duct or cable tray occupying the only sensible controller location.
Existing buildings also create less obvious questions. Can the lift doors be installed and adjusted from the landing side? Is there enough clear space to bring materials into the building? Will temporary works be needed while an opening is formed? Can the building remain in operation, and if so, which parts of the works need to be staged outside trading or tenant hours?
These are not reasons to avoid retrofit. They are the scope that needs to be identified before a programme and contract sum are relied upon.
External shafts can reduce internal disruption
An external shaft is often considered when cutting through occupied floorplates would disrupt tenants or compromise usable area. It can provide a more direct structural solution and keep much of the installation activity outside the building envelope.
It also introduces its own coordination. The connection at each landing still needs careful detailing. Weatherproofing, façade penetrations, thresholds, fire separation where relevant, drainage and external access all meet at the opening. The new shaft structure must also be set accurately relative to the building. A well-built external frame does not help if the landing openings and door positions do not line up.
Whether it is internal or external, retrofit succeeds when the new work and old structure are treated as one interface, not separate packages.
The builder’s-work scope decides how smoothly installation runs
Most lift delays are not caused by the equipment arriving late. They occur when the shaft is not ready for installation, a landing opening needs alteration, power has not been brought to the agreed point, or the controller room assumption has changed.
The builder’s-work scope should identify who provides the shaft walls or frame, pit construction and waterproofing, landing openings, lintels, door recesses, structural fixing zones, electrical supply, lighting, access and finishes around thresholds. It should also state what remains accessible after the lift is installed. Service access is often overlooked where a controller is tucked into a cupboard or ceiling space that becomes difficult to reach once fitout is complete.
For a retrofit, document the condition of the existing surfaces and structure before works begin. Not every variation can be removed from an existing-building project. Hidden conditions exist. But a measured survey, service investigation and agreed responsibility for opening-up works reduce the number of surprises that arrive after the lift design is released.
Do not let the shaft dictate the wrong equipment
A constrained shaft may point towards a particular lift configuration, but it should not override the operating requirement. A smaller car may fit an existing void, yet be unsuitable for the stock, trolleys or tenant use planned for the building. In that case, an external shaft, a revised location or a different material-handling arrangement may be the better decision.
The opposite can also be true. If the use is occasional, controlled and limited to goods, a simpler equipment arrangement may suit the operation better than extensive structural work to create a larger passenger-capable installation. The deciding factor is how the equipment will be used every day, not what is easiest to draw into the first available space.
Lift equipment for these projects is selected and installed against its intended use, applicable Australian installation requirements and the project-specific design. Equipment manufactured to EN 81-20:2020, EN 81-50:2020 and the 2014/33/EU Lifts Directive can then be installed to AS 1735.1.1:2022 and AS 1735.1.2:2020, with WorkSafe registration addressed as part of the project process.
Make the decision before the structure is committed
For a new build, bring the lift contractor into the design while the shaft, loading routes and controller location can still move on paper. For a retrofit, inspect the actual building before a preferred lift layout becomes a promise to tenants or a line item in a fixed construction contract.
The best option is not always a new shaft, and it is not always a retrofit. It is the arrangement that lets the intended users move the intended loads without creating avoidable structural work, operating constraints or service access problems later.
