The Headline Numbers
The planning average you will hear for converting a dry warehouse to cold storage is $100 to $150 per square foot, against $130 to $350 for purpose-built new construction. That is true on average and misleading in practice, because the temperature you are holding decides which end of the range you live on.
- Controlled ambient (around 55°F): a light lift, often well under $100 per square foot.
- Cooler (around 35°F): roughly $150 to $200 per square foot all-in.
- Freezer (around -10°F): roughly $350 to $500 per square foot once the heated floor, thicker panels, and heavier refrigeration are counted.
Most real projects are multi-temp, with a cooler majority, a smaller freezer, and a conditioned dock, so the blended number depends mostly on how much freezer you insist on.
The Four Heavy Items
Budget these four separately. Together they are usually 70 percent or more of the project, and each has its own lead time.
Envelope. Insulated metal panels built as a room within the existing shell, commonly $15 to $40 per square foot of wall and ceiling area. Coolers use roughly 4 to 6 inches, freezers 5 to 8 or more. Remember that you are buying wall and ceiling area, not floor area. A 20,000-square-foot room with 28-foot walls carries far more panel than its footprint suggests.
Floor. Often close to zero for a cooler on a sound slab. For a freezer, demolition plus a new assembly: vapor retarder, rigid insulation, a glycol or electric heating grid at about $3 to $8 per square foot, and a fiber-reinforced wearing slab at about $5 to $12. All-in, the freezer floor commonly runs $25 to $40 per square foot.
Refrigeration. The plant, evaporators, piping, and controls. It is the largest single line and is highly sensitive to system type and temperature, and it is now shaped by the 2026 EPA refrigerant limits covered in our permits piece.
Electrical service. A new transformer, switchgear, and distribution, and possibly a utility extension. The cost varies wildly by site, and the lead time is often the longest item in the project.
The Items People Forget
- Fire protection: dry-pipe or antifreeze systems in freezers, and often in-rack sprinklers with their own freeze protection.
- Doors: insulated high-speed or bi-parting doors at every temperature transition, with heated frames in freezers.
- Dock: seals or shelters, insulated overhead doors, levelers, and ideally a refrigerated dock.
- Structural reinforcement: roof and columns carrying hung ceilings and penthouse units.
- Commissioning: envelope infrared scans, a staged pull-down, and a temperature mapping study.
- Soft costs and permits: engineering, a refrigeration engineer of record, and fire review. The permits alone can reach high five figures.
Why Small Projects Cost More Per Foot
Refrigeration plants and electrical services do not scale down in a straight line. A 5,000-square-foot conversion still needs a compressor system, controls, a dock, and a service upgrade, spread over a quarter of the pallet positions. Expect the per-foot cost to climb noticeably as the footprint shrinks. The same effect shows up in vertical farm budgets, where HVAC and power dominate small builds.
The Bill That Never Stops: Energy
Plan on roughly $0.50 to $1.25 per square foot per month for energy, before demand charges. On 20,000 square feet that is about $10,000 to $25,000 a month. Demand charges come on top and can be severe if compressors start together. Staged controls, variable frequency drives on compressors and fans, and good door discipline are the levers you actually control.
The envelope quietly sets this number for the life of the building. A poorly detailed vapor barrier lets moisture into the panels, where it freezes, degrades the insulation, and pushes you above the top of that band permanently. Saving money on sealing details is the most expensive false economy in the project.
Revenue Is Priced Differently
Cold storage is usually sold per pallet position per month plus handling charges in and out, or leased triple-net at a clear premium over dry industrial rent. Get quotes from local operators rather than relying on national averages. New purpose-built supply has softened some markets, so model utilization conservatively.
Money Back: Rebates and Grants
Utility efficiency rebates on refrigeration, variable frequency drives, controls, and LED lighting can be substantial, and they usually require pre-approval before equipment is bought. USDA rural development and food-supply-chain programs have funded this kind of conversion in rural areas. Apply before you order equipment, because rebates rarely work retroactively.
Related Reading
- Dry Warehouse to Cold Storage: How to Tell If Your Building Can Make the Jump
- Ammonia vs. CO2 vs. Packaged Units: Cold Storage Refrigeration Compared
- What It Really Costs to Convert a Big-Box Store into Self-Storage in 2026
Work through the full build in the dry warehouse to cold storage guide, and test your own numbers in the cost calculator.