Good warehouse layout design starts with your data, not your floor plan. Choose a flow (U-shaped, straight-through or L-shaped) that suits your building and volumes, place your fastest-moving products closest to dispatch, size aisles for your forklifts, and use height before floor space. Separate people from forklifts, and review the layout every 12 to 18 months as your product mix changes.
Most warehouses that feel “full” are really badly laid out. Pickers walk too far, receiving and dispatch get in each other’s way, and racking leaves gaps no pallet can use. This guide explains the main models, how to approach warehouse layout design using your own data, and the signs it is time to redesign.
What makes a good warehouse layout design?
A good warehouse layout design moves stock from receiving to dispatch in as few steps as possible, safely, while using as much of the building’s volume as you can. In practice that means:
- Short travel: picking is usually the biggest labour cost in a warehouse, and most picking time is spent walking.
- One-way flow: goods move in one direction, without inbound and outbound crossing.
- Using height: cubic capacity matters more than floor area.
- Safety: separate pedestrian walkways from forklift routes, with clear sight lines at intersections.
- Room to change: space that can flex for peak season, returns or new product lines.
Common signs of a poor layout: congestion at the docks, pickers backtracking, half-empty pallet locations (“honeycombing”), stock stored in aisles, and overtime even when volumes are normal.
Which model should I use for my warehouse layout design?
| Model | How it works | Suits | Watch out for |
|---|---|---|---|
| U-shaped | Receiving and dispatch on the same side; goods loop through storage and back | Small to mid-sized warehouses; shared dock doors and staff | Congestion at the docks when inbound and outbound peak together |
| Straight-through (I-shaped) | Receiving at one end, dispatch at the other | High volumes, cross-docking, long buildings with doors at both ends | Longer average travel; needs two dock teams |
| L-shaped | Receiving and dispatch on adjacent sides | Corner sites or buildings where doors can’t go on opposite walls | Dead space in the corner if not planned |
Your building often decides for you: the position of dock doors, columns and the yard matter more than a textbook diagram.
When we review a warehouse layout design, the biggest gains rarely come from moving racks. They come from moving products: putting the fastest-moving 20% of SKUs in the most accessible locations near dispatch. That change alone often cuts picker walking noticeably, costs little, and can be done over a few weekends without stopping orders.
How do I approach warehouse layout design step by step?
- Collect your data: 6–12 months of orders, SKU dimensions and weights, units per order, inbound volumes and peak periods.
- Rank SKUs by velocity: group them into A (fast), B (medium) and C (slow) movers. See our guide to warehouse slotting optimization.
- Size each zone: receiving, bulk storage, pick faces, packing, dispatch, returns and any special areas such as cold storage or dangerous goods.
- Choose your flow model to suit your building’s doors and columns.
- Choose storage and equipment: selective pallet racking, drive-in, longspan shelving or mezzanines, matched to your forklifts. Our guide to pallet sizes helps here.
- Draw it to scale and walk the main pick paths on paper before moving anything.
- Check safety and compliance: separation of people and forklifts, racking load signs and inspections, and egress routes.
- Implement in stages so orders keep flowing, and measure before and after.
How wide should warehouse aisles be?
Aisle width depends on your forklifts. As a rough guide (always check the manufacturer’s specification):
| Equipment | Typical working aisle |
|---|---|
| Counterbalance forklift | About 3.5–4 m |
| Reach truck | About 2.7–3.2 m |
| Very narrow aisle (VNA) truck | About 1.6–2 m |
| Hand-picking aisles (shelving) | About 1–1.2 m |
Narrower aisles fit more storage but need more specialised, more expensive equipment, and can slow picking. In Australia, racking should be designed and installed to AS 4084, with regular inspections.
Frequently asked questions
How often should I review my warehouse layout design?
Every 12 to 18 months, or whenever your product range, order profile or volumes change significantly. Slotting should be reviewed more often, at least every quarter.
What is the difference between a warehouse and a distribution centre layout?
A storage warehouse prioritises density and long-term storage. A distribution or fulfillment centre prioritises speed, with more space for picking, packing and dispatch.
Can I improve my warehouse layout design without moving buildings?
Usually, yes. Re-slotting fast movers, adding a mezzanine, changing racking types or fixing dock flow can release a lot of capacity before you need a bigger building.
Do I need software to design a warehouse layout?
Not necessarily. A scaled drawing and a spreadsheet of SKU velocity go a long way. Warehouse management systems and simulation tools help in larger or more complex operations.
When should I outsource instead of redesigning?
If you have run out of space and a new building or major fit-out would be a large investment, compare that cost with moving to a 3PL. Our warehouse cost calculator helps you compare.
Want a second opinion on your layout?
Warenous warehouse consultants review your layout and data, then recommend practical changes you can make without stopping operations.
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