Electrical Estimating Services
Material, labor and quantity estimating from electrical drawings — feeders, branch circuits, devices, panels, lighting and fire alarm — structured so your bid reflects what the drawings actually require.
From Drawings to Dollars
Electrical estimating is one of the most detail-intensive scopes in construction. A single commercial set can contain hundreds of receptacles, dozens of lighting circuits, multiple panelboards, feeder schedules, fire alarm loops and low-voltage data runs — each one requiring measurement from a specific drawing sheet, a unit price and a labor rate that reflects the actual installation conditions.
When an electrical contractor is bidding three or four projects simultaneously, the estimate is where quality breaks down first. Circuits get assumed instead of measured. Feeder lengths get estimated from the building footprint rather than traced from the panel schedule to the load. Device counts get rounded. The bid goes out with gaps the estimator knows are there but cannot fix before the deadline.
That is the gap CEDS Estimating fills. We measure every circuit, every conductor foot, every device count and every panel schedule from your electrical drawings, then apply material and labor costs that reflect the actual scope. Your team still sets the price, chooses the subcontractors and decides the margin — what you get back is a structured electrical cost picture built from the documents.
What We Measure
- Conductor and cable by type, size and length
- Conduit by material, size and routing
- Panelboards, switchgear and disconnects
- Receptacles, switches and GFCI counts
- Lighting fixtures by type and quantity
- Fire alarm devices, panels and loop wiring
- Data, AV and low-voltage systems
- Service entrance and transformer equipment
- Grounding, bonding and raceway systems
Electrical Systems We Estimate
Electrical construction encompasses far more than wire and boxes. A complete electrical scope includes power distribution, lighting, fire alarm, low-voltage data and communication systems, specialty equipment connections and the service entrance equipment that brings power into the building. Each of these systems is measured from a specific drawing set and priced against the labor and material rates that apply to the actual installation conditions.
Power Distribution
Feeders from the service entrance to each panelboard, branch circuits from panels to loads, conduit and wire sizing, overcurrent protection and disconnect switches. Feeder schedules are traced from the load to the panel to the service, not estimated from building dimensions.
Lighting
Interior and exterior fixtures by type — recessed, surface, pendant, wall pack, area, emergency and exit signage. Fixture counts are taken from the lighting plan, lamp and ballast specifications from the schedule, and control devices from the switching diagram.
Fire Alarm & Life Safety
Initiating devices, notification appliances, control modules, fire alarm panel, loop wiring and annunciation. Fire alarm estimating requires close reading of the fire alarm drawings and the specification section to capture every device, every wire type and every interface with other building systems.
Low Voltage & Data
Structured cabling, telephone, data, AV, security and access control systems. These systems often carry separate specifications and different labor rates than the power scope, and are frequently allowance-based when the design is not yet finalized.
Large Equipment
Motors, Variable Frequency Drives, HVAC equipment connections, kitchen equipment, industrial machinery and specialty loads. Equipment connections include the conductor, conduit, disconnect and overcurrent protection measured from the equipment schedule and single-line diagram.
Service & Feeders
Service entrance conductors, metering, transformers, switchgear, generators and transfer switches. These are among the highest-cost items in an electrical scope and must be measured precisely from the single-line diagram and the load calculations.
How an Electrical Estimate Is Built
Electrical estimating follows a structured sequence that moves from the drawings to a priced, organized cost model. Each step builds on the previous one, and skipping any step introduces errors that compound through the rest of the estimate.
Drawing Review
The electrical drawings — power plans, lighting plans, fire alarm plans, single-line diagrams, panel schedules, load calculations and the electrical specification — are read in full. The estimator identifies the design level, the scope boundaries and any sheets or details that are missing or marked as "by others."
Branch Circuit Measurement
Individual circuits are traced from each panel to the loads they serve. Conductor lengths are measured from the drawing scale, conduit is sized per the specification and raceway type is noted. Every circuit is organized by panel and by circuit number so the estimate reads the way an electrician prices the work.
Feeder Schedule Tracing
Feeders from the service entrance to each panelboard are measured from the single-line diagram and the panel schedule. Conductor sizes, conduit sizes and routing are identified for each feeder. This is where the highest-cost items in the electrical scope concentrate, and precision matters more here than on any other circuit.
Device & Fixture Counts
Every receptacle, switch, junction box, lighting fixture, exit sign and fire alarm device is counted from the plans and organized by type, location and circuit. Fixture counts cross-reference the lighting schedule for lamp types, wattages and control requirements.
Labor Productivity Application
Material costs are applied to quantities, then labor hours are calculated using industry-standard productivity rates adjusted for the actual installation conditions — height, accessibility, congestion and the specification requirements that affect installation difficulty.
Review & Delivery
The estimate is checked against the drawings, organized by panel, by circuit and by trade package, and delivered in a format your team can use for bidding or buyout. Every line is traceable. Every assumption is documented. Your overhead and profit remain your addition.
Sample Electrical Takeoff Excerpt
The table below shows a small excerpt from a typical commercial electrical estimate — the kind of structured line-by-line breakdown your team receives. Each entry is measured from the drawings and priced with the applicable material and labor rates.
| Item | Qty | Unit |
|---|---|---|
| Feeder — 500 kcmil, 4-conductor, in 3″ EMT | 285 | LF |
| Feeder — 3/0 AWG, 4-conductor, in 2″ EMT | 410 | LF |
| Branch circuit — #12 THHN, 20A circuits in ¾″ EMT | 3,240 | LF |
| Receptacle — 15A, 120V, Duplex, GFCI | 142 | EA |
| Receptacle — 20A, 120V, Duplex, isolated ground | 36 | EA |
| Lighting fixture — 2×4 LED recessed troffer, 40W | 96 | EA |
| Lighting fixture — LED wall pack, 30W, exterior | 18 | EA |
| Panelboard — 42-circuit, 200A, NQ type | 4 | EA |
| Switchgear — 1600A, 480Y/277V, 3-phase | 1 | EA |
| Fire alarm initiating device — smoke detector, photoelectric | 64 | EA |
| Fire alarm notification — horn/strobe combination | 48 | EA |
| Data — Cat6A UTP horizontal cable, in cable tray | 4,800 | LF |
| Illustrative sample only — your estimate is built from your project drawings | ||
Sample quantities and items are shown for illustration purposes. Your actual estimate will reflect the specific drawings, specifications and market pricing for your project.
What You Receive
- Cost Summary
- A top-level summary by system — power, lighting, fire alarm, low voltage, service entrance — showing the total estimated electrical cost and the percentage each system represents.
- Detailed Breakouts
- Line-by-line quantities, rates and extensions organized by panel, by circuit and by system. Each entry is traceable to a specific drawing sheet so your team can interrogate any line before the bid goes out.
- Assumption Log
- Every assumption, inclusion, exclusion and unmeasured item documented. If a detail is missing from the drawings, the assumption is written down rather than silently priced or omitted.
- Trade Packages
- Separate cost breakdowns for power, lighting, fire alarm and low-voltage systems, structured so subcontractor quotes compare cleanly against the estimate line by line.
- Review Call
- Time to walk through the estimate, ask questions and request refinements before you commit to the number on bid day.
A Note on Allowances & Specialty Systems
Structured cabling, audio-visual systems, security, access control and specialty low-voltage systems are frequently specified at a level where exact quantities cannot be measured from the drawings. Rather than guessing at conductor counts or device quantities that may change during design, we carry these as allowance line items with a documented basis and range. Your team can then confirm the allowance against the actual design as it develops, or substitute a vendor quote when the system is finalized.
This is standard practice in electrical estimating for commercial and institutional projects. The electrical drawings often carry a note that reads "low voltage systems by others" or "data cabling per IT consultant," which means the exact scope is not yet defined at bid time. An honest estimate flags these items rather than embedding guesses. When the allowance is documented and structured as a separate line, it becomes a manageable cost rather than a surprise during construction.
We also flag items that require vendor quotes — generators, transfer switches, specialized switchgear, arc-flash compliant equipment and any item where the specification calls out a proprietary product or a specific manufacturer. These items carry a wider price range than standard devices, and the estimate reflects that with a documented assumption rather than a single number that may prove misleading.
Frequently Asked Questions
Turnaround depends on the size of the electrical drawing set and the complexity of the scope. A straightforward commercial electrical estimate can be completed in four to seven working days. Larger or more complex projects — hospitals, data centers, industrial facilities — typically require seven to twelve working days. We confirm the timeline before starting and schedule the work so it lands ahead of your bid deadline.
The power plans, lighting plans, fire alarm plans, single-line diagrams, panel schedules, load calculations and the electrical specification section. If some of these are not yet available, we can prepare a budget estimate from what exists and carry the missing items as documented assumptions. The more complete the drawing set, the more precise the estimate.
Yes. Structured cabling, data, telephone, AV, security and access control systems are estimated from the low-voltage drawings when available. When the design is not yet finalized, these are commonly carried as allowance line items with a documented basis, so the estimate reflects the scope without embedding guesses that may prove misleading.
Yes. Many clients send us a specific portion of the electrical scope for a focused estimate. This is common when a contractor handles some work with their own crews and packages the rest for subcontractors. We structure the estimate so each system reads independently and can be compared to subcontractor quotations cleanly.
Only if you request it. We keep your overhead, profit and contingency separate from the direct electrical cost so you can see and control your own markup before the number goes out. When a lender or owner requires a loaded number, we can present it with the breakdown clearly shown rather than embedded in the line items.
Built for the Bid, Not the Spreadsheet
"We had a 38-page electrical set for a medical office building and five working days to bid. CEDS measured every circuit, every feeder and every device count from the drawings, and delivered a structured estimate we could price in an afternoon. We won the work and the electrical cost held within three percent of actuals."
Electrical contractor, Virginia — medical office tenant improvement
Ready to estimate your electrical scope?
Send your electrical drawings and we will confirm the scope, level of detail and turnaround for your electrical cost estimate.