DX rack capex for an 80,000 sq ft cold-storage build in Tampa Bay (2026)

80,000 sq ft single-story cold-storage warehouse, two zones: a 60,000 sq ft 28°F cooler bank and a 20,000 sq ft -10°F freezer bank, with a 2,000 sq ft refrigerated dock. Total connected refrigeration load roughly 240–290 tons at design ambient. Built on a slab with under-floor heating in the freezer zone. Tampa Bay site, inland (Hillsborough or Pasco), good utility infrastructure.

These numbers shift coastal (add 8–14% on corrosion-mitigation upgrades), shift on multi-tenant 3PL with smaller zones (add 5–12% on additional valving and controls), and shift on simpler single-tenant operations (subtract 3–8%).

Multi-stage parallel rack with 4–6 semi-hermetic or screw compressors, oil management system, suction-line accumulator, and supervisory controller (Danfoss AK-SM 800 or equivalent). On an 80,000 sq ft build, typical scope: $385,000–620,000 turnkey including factory build, delivery, set, piping to the building envelope, and start-up commissioning.

Machine room construction and electrical: $120,000–220,000 including 277/480V three-phase service, MCC and disconnects, lighting, ventilation, and code-required egress. Variance driven by site electrical infrastructure and length of utility service run.

Evaporative condenser, 250–325 ton capacity (oversized 10–20% above peak load): $145,000–245,000 for a BAC, EVAPCO, or Marley unit with stainless basin (Tampa Bay specification), VFD-driven fans, and water-side accessories. Concrete pad, water and drain piping, and chemistry tie-in: another $35,000–65,000.

Air-cooled condenser alternative same capacity: $110,000–190,000 for the equipment, $25,000–50,000 install. Saves on the water-side scope but loses 8–14% on annual energy in Tampa Bay summer climate.

8 medium-temp evaporators serving the cooler bank plus 4 low-temp evaporators serving the freezer bank, plus 1 dock-area unit cooler: 13 total. Krack, Colmac, or Imeco mid-range industrial coils with electric defrost on freezer (or hot-gas where rack supports), VFD-controlled fan banks: $185,000–310,000 turnkey for the evaporator package.

Drain piping, condensate management, and trace-heat circuits: $35,000–65,000.

Suction and liquid lines from machine room to all 13 evaporator branches, branch headers, isolation valves, sight glasses, and EEV installations: $185,000–320,000. The variance comes from piping run length (a long building with the machine room at one end is more expensive than centered) and complexity of branch-out.

Insulation on cold piping: $48,000–95,000. Cold-pipe insulation in Tampa Bay humidity is a quality-engineering item; under-spec insulation drives sweating, dripping, and ceiling damage that surfaces 12–24 months after commissioning.

R-454C or R-455A initial charge: 1,200–1,800 lb on this build envelope. At 2026 wholesale pricing, $42,000–72,000 in refrigerant alone. AIM Act-driven supply tightening has pushed HFO blend pricing meaningfully above HFC blends; budget the upper end of the range.

Initial charge plus first-year top-up reserve (typically 3–5% of initial): another $1,500–3,500.

Supervisory rack controller (typically included in compressor rack scope above). EEV controllers per circuit. BAS integration if present. ColdSentry continuous monitoring with cellular alerting on every zone (recommended): $24,000–48,000 turnkey for monitoring on 13 evaporator zones plus rack-side and condenser-side instrumentation.

Without continuous monitoring at start-up, you are commissioning a system whose operational baseline you cannot trend. Budget for it on day one.

Glycol-loop under-floor heating system on the 20,000 sq ft freezer slab: $135,000–235,000 including circulator pumps, heat source (typically reclaim from rack discharge or dedicated boiler), piping, controls, and glycol fill. This is a one-time capex that pays back across 30–50 years of slab integrity protection.

Skipping under-floor heating on a -10°F freezer slab in Tampa Bay groundwater is a path to frost heave and full slab replacement at year 8–14. Do not skip.

Multi-week commissioning by the rack contractor including charge-up, leak survey, capacity testing under simulated load, controls tuning, and operator training: $48,000–95,000. Final commissioning report becomes the operations baseline document.

IQ/OQ documentation if customer-required (typical on USDA-inspected operations and on pharmaceutical 3PL): add $15,000–32,000 to commissioning scope.

Sum the line items: $1.4M on a tightly scoped inland single-tenant build at the lower end; $2.2M on a coastal multi-tenant operation with redundancy upgrades and aggressive monitoring scope. The middle of the band ($1.6M–1.9M) is what most Tampa Bay 3PL builds in this size envelope are landing in 2026 dollars.

Variance drivers in order of impact: tonnage and zone count, condenser architecture, refrigerant blend, monitoring scope, redundancy spec on rack, and site electrical infrastructure. Coastal location adds 8–14% across most line items.