If you’re running out of warehouse space, the obvious solution seems to be moving to a bigger facility or leasing additional square metres. But honestly, that’s often the expensive option when cheaper alternatives exist right under your nose.
I’ve seen this scenario play out dozens of times over my career in supply chain consulting. A business assumes they’ve maxed out their capacity, starts shopping for new premises, and then someone takes a proper look at what’s actually happening inside their current four walls. More often than not, there’s significant room for improvement before signing any new lease agreements.
John Monck, a specialist consultant in warehousing at Logistics Bureau, has some practical insights on this topic that align closely with what I’ve observed working with clients across various industries. His approach focuses on extracting maximum value from existing facilities before committing capital to expansion.
The Difference Between Location Capacity and Cubic Capacity
Here’s something that catches a lot of warehouse managers out. When your locations are full, it doesn’t necessarily mean your warehouse is full.
John emphasises looking beyond just location-based capacity. The thing is, you might have every pallet position occupied, but still have significant unused cubic space above those pallets. That vertical space represents real capacity you’re not using.
One of his practical suggestions involves adding extra beams or shelves to create additional storage levels. This compresses what would otherwise be empty air into usable space. It’s a relatively low-cost adjustment that can meaningfully increase your storage capacity without touching your facility’s footprint.
I’d add that before implementing any vertical storage solutions, you need to understand your product profiles. What are the actual dimensions of what you’re storing? How does that match up against your current racking configuration? Often there’s a mismatch that’s developed over time as product ranges have evolved but racking hasn’t kept pace.
Dealing with Slow and Obsolete Inventory
This one’s a bit uncomfortable for some businesses to confront, but it matters. John points out that slow-moving or outdated items—what the industry calls SLOB (slow and obsolete inventory)—can quietly consume valuable warehouse real estate.
Think about it this way: if you’ve got products sitting in prime picking locations that only move a handful of times per year, you’re essentially paying premium storage costs for items that don’t deserve that space.
John’s recommendation is to consolidate these slower items into higher racking areas or commingling them in less accessible locations. This frees up your best positions for products with genuine velocity.
From a broader inventory management perspective, this connects to a larger question: why do you have this stock in the first place? Is your purchasing team ordering based on historical patterns that no longer reflect reality? Are there products that should be discontinued entirely? Sometimes the best warehouse optimisation strategy is simply having less stuff to store.
Managing Seasonal Inventory Without Permanent Expansion
Seasonal fluctuations create a particular challenge for warehouse planning. If you’re a retailer building stock for the Christmas rush, or a business in any sector with predictable peaks, you face a decision: do you size your warehouse for average demand or peak demand?
John suggests that building additional permanent warehouse space to handle seasonal surges often isn’t the smartest move. Instead, temporary solutions like off-site storage or external containers can manage these peaks without the long-term cost commitment.
I’d extend this thinking to include third-party logistics arrangements. Rather than owning or leasing space you’ll only need for a few months each year, partnering with a 3PL provider for overflow storage can make financial sense. You pay for flexibility rather than fixed costs.
The key is planning ahead. If you wait until you’re drowning in pre-Christmas inventory to find overflow space, your options will be limited and expensive. Build these arrangements into your annual planning cycle.
High-Density Storage Systems: When the Investment Makes Sense
For some operations, the answer lies in technology investment. John highlights vertical lift machines, carousels, and other automated storage systems that fundamentally change how you use cubic space.
These systems bring products to the picker rather than having pickers travel to products. This approach reduces aisle space requirements dramatically and improves productivity in the process.
The caveat here—and John acknowledges this—is that the initial cost is higher. You’re not just buying equipment; you’re often reconfiguring workflows and potentially retraining staff.
Whether this investment makes sense depends on your specific situation. Questions I’d encourage you to consider:
- What’s your current cost per pick?
- How much is labour costing you annually?
- What’s the realistic payback period on the equipment investment?
- Does your product mix suit automated handling?
For high-value, high-velocity items with consistent sizing, high-density automation often pencils out well. For bulky, irregular items with lower turnover, the economics might not stack up.
Simple Layout Changes That Deliver Real Results
Sometimes the solutions are surprisingly straightforward. John mentions a case where narrowing aisles and switching to different forklift types led to a 30% increase in available space.
That’s not a trivial gain. Think about what 30% more capacity means if you were otherwise considering expansion. The cost difference between adjusting your layout versus leasing additional premises is substantial.
Layout optimisation isn’t glamorous work, but it’s worth doing properly. Questions to examine:
- Are your aisles wider than they need to be for your current handling equipment?
- Could you achieve the same throughput with narrower aisles and more appropriate forklifts?
- Is your current layout still optimal for your product flow, or has it evolved piecemeal over the years?
I’ve worked with clients who’ve never properly reviewed their warehouse layout since the original setup. Products change, volumes shift, handling requirements evolve—but the physical configuration stays frozen in time. A fresh assessment often reveals opportunities that have built up gradually.
Before You Sign That Lease
The broader point here is that warehouse expansion should be a last resort, not a first response to capacity pressure. The strategies John outlines—vertical storage, inventory rationalisation, flexible seasonal solutions, high-density systems, and layout optimisation—represent a logical sequence to work through before committing to additional premises.
Each of these approaches requires some investment of time and potentially capital, but typically at a fraction of what facility expansion costs. And unlike a new lease, these improvements follow you if you do eventually need to move.
If you’re feeling the squeeze on warehouse capacity, I’d suggest starting with an honest assessment of what you’ve actually got and how efficiently you’re using it. The answer might surprise you.
