You are pricing a data center — a building where the electrical and mechanical systems are the building. A generic square-foot number will not survive bid day. As a data center estimating company, we take off the white space, the electrical rooms, and the yard the way the drawings actually sequence them: utility service to switchgear, switchgear to UPS systems, UPS to busway, busway to cabinet. On the mechanical side, our data center mechanical estimating traces chiller plant chilled water loops, CRAH units, and economizer piping rather than treating cooling as a tonnage allowance. Our data center construction estimating takeoffs are organized by CSI MasterFormat division — Division 26 electrical, Division 23 HVAC, Division 27 communications, Division 28 electronic safety and security, Division 03 concrete, Division 05 metals, Division 09 finishes, Division 22 plumbing, Division 21 fire suppression, and Division 16 legacy — so your estimator can drop them straight into your pricing sheet.
- Deliverable
- Excel estimate + marked-up PDF plans
- Organized by
- CSI MasterFormat section
- Turnaround
- 24–48 hours for most projects
- Pricing
- ZIP-code-adjusted material and labor pricing
- Software
- Bluebeam Revu, PlanSwift, RSMeans data
We build the estimate on a cost breakdown structure that separates general conditions, long lead items, escalation, and contingency, so you can see where the money sits before you mark up. For electrical scope, that means switchgear, UPS modules, busway, panelboards, feeders, and fiber optic backbone pathways. For mechanical scope, that means chillers, CRAH units, pumps, piping, valves, and hot aisle containment or cold aisle containment. We also flag items that affect PUE and any LEED or Energy Star documentation scope that carries cost. Where the design follows a known topology, we map it to TIA-942 or an Uptime Institute tier target and note what that tier changes in the takeoff.
If you also price warehouse construction, manufacturing plants, or cold storage, the format will look familiar. We work from your PDFs and IFC drawings in Bluebeam Revu, PlanSwift, and RSMeans data, with ZIP-code-adjusted material and labor pricing. Where a full takeoff is not practical, we can run parametric estimating from capacity and area metrics. Turnaround is 24–48 hours for most projects, with rush available. Send plans through the get an estimate page and we will confirm scope before starting. We also provide industrial estimating services for other facility types.
What the data center quantity takeoff covers
We measure the mission-critical systems that drive 60–70% of a data center's construction cost. That means counting UPS modules, generator sets, CRAH units, and busway runs — not applying a cost per square foot. The takeoff follows the electrical single-line and mechanical schematics, with quantities tied to plan sheets so you can audit every line. We separate shell-and-core from fit-out so you can price phased delivery.
Utility service entrance switchgear
Utility service entrance switchgear, main breakers, and line-up sections (26 24 00)
Medium-voltage transformers
Medium-voltage transformers, unit substations, and primary conduit (26 12 00)
Static or rotary UPS modules
Static or rotary UPS modules, battery strings, racks, and spill containment (26 33 00)
Diesel generator sets
Diesel generator sets, paralleling gear, day tanks, and fuel piping (26 32 00)
Automatic transfer switches and bypass isolation switches
Automatic transfer switches and bypass isolation switches (26 36 00)
Overhead and underfloor busway runs
Overhead and underfloor busway runs, plug-in units, and end taps (26 25 00)
Remote power panels
Remote power panels, cabinet PDUs, and branch circuit whips (26 24 00)
CRAH/CRAC units
CRAH/CRAC units, chilled water piping, pumps, and economizer (23 63 00)
What every data center estimating takeoff includes
- Utility service entrance switchgear, main breakers, and line-up sections (26 24 00)
- Medium-voltage transformers, unit substations, and primary conduit (26 12 00)
- Static or rotary UPS modules, battery strings, racks, and spill containment (26 33 00)
- Diesel generator sets, paralleling gear, day tanks, and fuel piping (26 32 00)
- Automatic transfer switches and bypass isolation switches (26 36 00)
- Overhead and underfloor busway runs, plug-in units, and end taps (26 25 00)
- Remote power panels, cabinet PDUs, and branch circuit whips (26 24 00)
- CRAH/CRAC units, chilled water piping, pumps, and economizer (23 63 00)
- In-row heat exchangers, CDUs, and facility water loops (23 63 00)
- Raised access floor, stringers, pedestals, and perforated tiles (08 34 00)
- Cable tray, fiber raceway, and structured cabling counts (27 11 00 / 27 15 00)
- Pre-action sprinkler zones and clean-agent suppression cylinders (21 13 00 / 21 13 19)
How our data center estimators take off a project
- Review the electrical single-lineWe start at the utility service and trace every feeder to switchgear, UPS, and panelboards. Each device gets a tag from the drawing, and we record the rating in kVA or amps. This gives us the equipment count before we measure any conduit. We also note the redundancy tier (N, N+1, 2N, 2N+1) because it changes the number of UPS modules, paralleling gear, and busway runs.
- Count busway and plug-in unitsBusway is measured run by run from the riser and plan views. We count plug-in units per cabinet row, not per run, because that is how they are bought. End taps and tap boxes are called out separately from the busway length. We also verify the busway rating (e.g., 4000A) and whether it is overhead or underfloor, as that affects support and installation.
- Trace cooling loops and CRAH unitsOn the mechanical side we follow chilled water supply and return from the plant to each CRAH. We count units from the schedule, then measure pipe, valves, and specialties from the isometrics. Condensate drains and humidifier piping are added even when not shown. We also check for economizer piping, pumps, and water treatment equipment that may be on separate sheets.
- Measure the white space floorRaised access floor is measured by the square foot of usable white space, not the building footprint. We add cutouts, ramps, and equipment ramps at the boundary. Perforated tile counts come from the airflow plan, not a percentage. We also note the pedestal type (e.g., 24 in) and stringer requirements, as these affect material cost and installation time.
- Build the division-organized takeoffEvery line is assigned a CSI section and a plan sheet reference. We separate equipment from distribution so you can apply your own labor rates. The final workbook is Excel with a PDF mark-up set showing where each quantity came from. We also include a summary tab by division and a list of assumptions and exclusions for clarity.
- Quality check and deliverBefore delivery, a second estimator reviews the takeoff against the drawings for missed items and unit errors. We cross-check equipment counts between the single-line and schedules, and verify linear measurements against plan scales. The final package is sent via email in Excel and PDF, with a brief summary of key quantities and any assumptions. Turnaround is 24–48 hours for most projects.
What we need from you
- Electrical single-lineShows UPS, switchgear, generator, and ATS counts. Without it we cannot separate equipment from distribution.
- Mechanical schematicsChilled water and condenser water loops with CRAH locations. Needed to measure pipe and count units.
- Floor plans and RCPsWhite space layout, busway routes, and cable tray paths. Used for linear measurements and cutout counts.
- Spec bookDivision 26, 23, 27, and 21 sections. Tells us material types, testing requirements, and included accessories.
- Equipment schedulesUPS, generator, CRAH, and PDU schedules with ratings. Prevents counting from symbols alone.
- Site utility planDuct bank route, manholes, and stub-up locations. Often missing from the electrical set.
Sample data center estimate format
This is how a typical data center takeoff is organized. Each line ties to a CSI section and a plan sheet so you can verify the quantity.
| Section | Line item | Qty | Unit | Ref. |
|---|---|---|---|---|
| 26 24 00 | Switchgear line-up 480V, 4000A, 6 sections | 6 | EA | E-101 |
| 26 33 00 | UPS module 750 kVA static, with battery racks | 6 | EA | E-201 |
| 26 25 00 | Busway 4000A overhead, incl. end taps | 1,250 | LF | E-301 |
| 23 63 00 | CRAH unit 30-ton chilled water, floor-mounted | 24 | EA | M-101 |
| 08 34 00 | Raised access floor, 24 in pedestals, incl. cutouts | 18,500 | SF | A-201 |
| 27 15 00 | MPO trunk cable 24-strand, per run | 96 | EA | T-101 |
| 26 32 00 | Generator 2.5 MW diesel, incl. day tank | 4 | EA | E-401 |
| 21 13 19 | Pre-action sprinkler zone, double interlock | 12 | EA | FP-101 |
| 26 36 00 | Automatic transfer switch 4000A, 4-pole | 8 | EA | E-501 |
| 23 63 00 | Chilled water pipe, 8 in, incl. valves and fittings | 1,200 | LF | M-201 |
Units we measure in
Data center quantities are counted by the piece for equipment and by the foot for distribution. Here is how we report each unit.
| Item | Unit | How it's measured |
|---|---|---|
| UPS module | EA | Counted per single-line diagram, including battery strings and racks |
| Busway | LF | Measured along the centerline of the run, including end taps |
| Cable tray | LF | Measured per route, adding 10% for fittings and bends |
| CRAH unit | EA | Counted per mechanical schedule, with chilled water connections |
| Chilled water pipe | LF | Measured per isometric, including valves and specialties |
| Concrete slab | CY | Volume from thickness on section, including equipment pads |
| Structural steel | TON | Weight from member sizes and lengths on framing plans |
| Raised floor | SF | Area of white space, including cutouts and ramps |
Worked example: Takeoff of a 4000A overhead busway run
This example walks through the takeoff of a single overhead busway run from the electrical room to a row of cabinets. All dimensions and quantities are illustrative and do not represent a specific project.
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Measure the run length from the plan. On sheet E-301, the busway centerline starts at the switchgear (grid C-4) and ends at the last cabinet (grid F-8). Scaling the plan gives 85 feet. Add 5 feet for the vertical drop from the overhead support to the switchgear terminals. Total run length = 90 LF.
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Account for fittings and bends. The run includes two 90° elbows and one offset. Each elbow adds 2 LF of equivalent length, and the offset adds 3 LF. Total equivalent length = 90 + (2×2) + 3 = 97 LF. Round up to 100 LF for ordering.
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Count plug-in units per cabinet row. The power plan shows 12 cabinets in a row. Each cabinet requires one plug-in unit with a 60A breaker. Count = 12 EA. Add one spare plug-in unit per row as a common practice. Total plug-in units = 13 EA.
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Count end taps and tap boxes. The run has one end tap at the switchgear and one at the last cabinet. Each end tap requires a tap box. Count = 2 EA.
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Apply waste factors. Busway is ordered in 10-foot sections. For a 100 LF run, order 11 sections (110 LF) to allow for cutting and waste. Waste factor = 10%. Plug-in units have negligible waste; order 13 EA.
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Include supports and hangers. Supports are spaced at 5 feet on center. Number of supports = (100 LF ÷ 5) + 1 = 21 EA. Each support includes a threaded rod, channel, and hardware.
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Add bonding jumpers. Code requires bonding jumpers at each busway section joint. Number of joints = 11 sections - 1 = 10 joints. Bonding jumpers = 10 EA.
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Summarize the takeoff. The final line items are: busway 4000A, 100 LF; plug-in units 60A, 13 EA; end taps, 2 EA; supports, 21 EA; bonding jumpers, 10 EA. All quantities are tied to sheet E-301 and section 26 25 00.
Additional check: busway ampacity and voltage drop. The specified busway is 4000A, 480V, 3-phase, 4-wire. Verify that the plug-in units match the busway rating. Each 60A plug-in unit requires a circuit breaker and a tap-off box. The total connected load per row is 12 cabinets × 60A = 720A, which is within the 4000A busway capacity. Voltage drop over 100 LF at 720A is negligible for this length, but confirm with the engineer if the run exceeds 150 LF.
Additional check: seismic bracing. If the project is in a seismic zone, add bracing for the busway supports. This may include sway braces and additional anchors. Check the structural drawings for requirements. For a typical installation, add 10% to the support count for bracing. In this example, add 2 supports for bracing, bringing the total to 23 EA.
Additional check: firestop and penetration. Where the busway penetrates a fire-rated wall, include firestop materials and labor. Count each penetration as one firestop assembly. In this run, there is one penetration at the electrical room wall. Add one firestop assembly.
Additional check: labeling and identification. Include labels for each busway section and plug-in unit. Labels must comply with NFPA 70E and the project spec. Count one label per section and one per plug-in unit. Total labels = 11 + 13 = 24 EA.
Additional check: testing and commissioning. Include testing of the busway and plug-in units. This includes insulation resistance tests and torque checks. List as a separate line item for the electrical contractor.
Summary of additional items: seismic bracing (2 EA), firestop (1 EA), labels (24 EA), testing (1 LS). These items are often missed in a simple linear takeoff but are required for a complete estimate. Always cross-check with the specifications and applicable codes.
What drives data center construction estimating cost
Relative impact on a typical estimate for this trade, based on estimator judgment. Select a bar for details.
Redundancy tier
N, N+1, 2N, and 2N+1 change equipment counts, paralleling gear, and busway routing. A 2N electrical topology roughly doubles switchgear and UPS counts versus N+1. We take off the tier shown on the drawings, not a default. The tier also affects the size of the electrical rooms and the amount of busway and cable tray required.
N, N+1, 2N, and 2N+1 change equipment counts, paralleling gear, and busway routing. A 2N electrical topology roughly doubles switchgear and UPS counts versus N+1. We take off the tier shown on the drawings, not a default. The tier also affects the size of the electrical rooms and the amount of busway and cable tray required.
Air-cooled CRAH, chilled water, direct-to-chip liquid, and immersion cooling each have different piping, pumping, and CDU requirements. Liquid cooling adds facility water loops and leak detection that air-cooled designs do not have. We measure the specific system shown on the mechanical schematics, including pumps, heat exchangers, and water treatment.
Overhead busway is faster to install but has higher material cost than cable-and-conduit. Underfloor busway reduces overhead congestion but requires more raised floor coordination. The choice changes both Division 26 and Division 08 quantities. We take off the distribution method shown on the drawings and note any transitions between overhead and underfloor.
Diesel, natural gas, and dual-fuel generators have different day tank, piping, and permitting requirements. Diesel needs fuel polishing and secondary containment; natural gas needs larger piping and gas detection. We include the fuel system scope from the mechanical and electrical drawings, and note any items that require coordination with the utility.
Phased cutovers require temporary power and temporary cooling, plus integrated systems testing. Load bank testing and breaker coordination studies are often separate scopes that need to be priced. We identify these in the takeoff as separate line items so you can decide whether to include them in your bid or exclude them.
Seismic zones, high water tables, and corrosive soils affect foundation design, grounding, and underground utilities. For example, seismic bracing for busway and cable tray adds material and labor. We adjust quantities based on the site location and note any special requirements from the geotechnical report or local codes.
NFPA 70 (NEC), NFPA 75, and local amendments dictate grounding, bonding, and fire suppression. For instance, NFPA 75 requires specific fire protection for IT equipment areas. We include code-driven items such as battery room ventilation and spill containment. Always confirm the adopted code edition with the local building department.
Common scope gaps we catch in data center bid leveling
These items are routinely missed because they fall between disciplines or are shown on a sheet nobody prices.
- Busway plug-in units counted per run instead of per cabinet row. We count them per row from the power plan and cross-check against the panel schedule.
- Battery racks, spill containment, and ventilation required by NFPA 1 and IFC Chapter 52. These are rarely on the electrical plans; we add them from the spec and confirm the adopted edition with the local building department.
- Generator exhaust stacks, silencers, and remote radiators. These show up on mechanical or architectural sheets, not the electrical single-line, so they are missed by electrical estimators.
- Duct bank encasement, manholes, and conduit stub-ups for the utility feed. The route is on the site plan, but the quantities are often left for the civil contractor.
- CRAH condensate drains, humidifier piping, and floor sinks. Shown on mechanical plans but not in the piping isometrics, so they are left out of the pipe takeoff.
- Raised floor cutouts, ramps, and equipment ramps at the white space boundary. These are detailed on architectural sheets and missed when the floor is priced by the square foot.
- Cable tray bonding jumpers every 50–100 LF and intersystem bonding terminations. Required by code but not shown as a line item on the drawings.
- Grounding and bonding for UPS and switchgear, including ground rings and counterpoise. Often shown on the electrical site plan but missed in the building takeoff.
- Fire suppression for battery rooms and IT spaces, such as clean-agent or pre-action systems. These are on the fire protection drawings but not in the electrical or mechanical takeoff.
Power train and cooling architecture comparison
The choice of power and cooling architecture drives both material quantities and installation labor. Use this table to compare common options.
| Architecture | Key takeoff items | Redundancy impact | Cost and schedule note |
|---|---|---|---|
| Static UPS with VRLA batteries | UPS modules, battery strings, racks, spill containment, ventilation | N+1 adds one module per group; 2N doubles modules | Lower first cost, shorter battery life, higher maintenance |
| Rotary UPS with flywheel | UPS modules, flywheel assemblies, concrete pads, cooling | N+1 adds one flywheel unit per group | Higher first cost, longer life, lower battery replacement |
| Diesel generators | Generator sets, day tanks, fuel piping, exhaust stacks, silencers | N+1 adds one generator; 2N doubles sets | Fuel polishing, containment, and permitting add cost |
| Natural gas generators | Generator sets, gas piping, gas detection, larger exhaust | N+1 adds one generator; 2N doubles sets | Lower fuel storage cost, but gas piping and detection add scope |
| Air-cooled CRAH | CRAH units, refrigerant piping, condensate drains, economizer | N+1 adds one unit per row | Lower piping cost, higher electrical load for compressors |
| Chilled water CRAH | CRAH units, chilled water piping, pumps, cooling towers | N+1 adds one unit and one pump | Higher piping and plant cost, better efficiency at scale |
| Direct-to-chip liquid cooling | CDUs, facility water loops, leak detection, manifolds | N+1 adds one CDU per loop | Higher first cost, supports high-density racks |
| Immersion cooling | Immersion tanks, CDUs, fluid handling, structural supports | N+1 adds one tank per group | Specialty fluids and structural loads drive cost |
Codes and standards that affect data center takeoff
Model codes
Data centers are governed by the IBC for building classification, the IECC for energy efficiency, and the NEC (NFPA 70) for electrical installations. NFPA 75 covers fire protection for IT equipment areas, and NFPA 76 addresses telecommunications facilities. The adopted editions vary by state and city. For example, the NEC edition affects grounding, bonding, and arc-flash requirements, which change quantities for ground rings and labeling. The IECC may require economizers or specific fan power limits, impacting mechanical equipment counts. Always confirm the adopted code edition with the local building department.
Industry standards
Estimators should reference ACI 318 for concrete equipment pads, ASTM standards for structural steel (AISC) and raised access floor (CISCA), SMACNA for ductwork, and NFPA 110 for emergency power systems. These standards dictate material specifications and testing requirements. For instance, AISC certification may be required for structural steel, and SMACNA duct construction affects sheet metal quantities. Battery installations must follow IEEE standards for ventilation and spill containment. These standards are often referenced in the spec book and change the material takeoff.
Specification sections
Key CSI sections for data centers include Division 26 (26 24 00 switchgear, 26 25 00 busway, 26 32 00 generators, 26 33 00 UPS), Division 23 (23 63 00 CRAH units), Division 27 (27 11 00 data center telecom rooms), Division 21 (21 13 00 clean agent), and Division 08 (08 34 00 raised access floor). Within each section, the spec dictates whether equipment is specified by model number or performance, which affects pricing. For example, a performance spec for UPS may allow multiple manufacturers, while a proprietary spec limits competition. The spec also lists accessories, testing, and commissioning requirements that add cost.
Local amendments
Local jurisdictions often amend model codes for seismic bracing, fire suppression, and environmental regulations. For example, California's Title 24 energy code has stricter economizer requirements than the IECC, and seismic zones require bracing for cable tray and busway. Some cities require additional permitting for diesel generators, including air quality permits. These amendments can add significant scope to the takeoff. Always confirm the adopted code edition and local amendments with the local building department before finalizing your estimate.
Who uses this data center estimate for contractors
General contractors
You need division-level quantities to build your bid and compare subcontractor quotes. The takeoff lets you see whether an electrical quote is low because it missed busway plugs or battery racks.
Electrical subcontractors
You price Division 26 and need accurate counts of switchgear, UPS, and busway. We give you the equipment list and the distribution quantities separately so you can apply your own labor rates.
Mechanical subcontractors
You price CRAH units, chilled water piping, and economizers. The takeoff separates equipment from piping so you can verify the cooling load and pipe sizes against your own estimate.
Developers and owner's reps
You need a budget before design is complete. Our takeoff follows the single-line and schematics, so you can see how changes in redundancy tier or cooling architecture affect cost.