Quick answer
A commercial construction cost breakdown splits a project budget into hard costs, soft costs, and general conditions, then allocates hard costs across CSI MasterFormat divisions such as 03 concrete, 05 structural steel, and 23 HVAC. Each division carries material, labor, equipment, and subcontractor markup, which together produce the cost per square foot.
- Hard costs typically run 70–85% of total project cost; soft costs and general conditions make up the rest.
- CSI MasterFormat divisions are the standard backbone for organizing trade costs on commercial bids.
- Labor is usually the largest single component of hard costs, often 35–50% depending on trade and region.
- Waste factors, general conditions, and escalation are the most commonly missed line items.
What Is a Commercial Construction Cost Breakdown?
A commercial construction cost breakdown is the systematic division of total project cost into trade packages that align with CSI MasterFormat divisions and UniFormat elements. It is the estimating framework that drives quantity takeoff, pricing, and buyout, not just a budget summary. By organizing costs this way, you can compare bids, track commitments, and manage changes with clarity.
The breakdown separates hard costs (materials, labor, equipment) from soft costs (design, permits, fees, financing). Hard costs are the physical construction; soft costs support the project but are not built. For early estimates, AACE estimate classes (Class 5 conceptual to Class 1 definitive) dictate the level of detail required. A Class 5 estimate might use uniformat elements and cost per square foot, while a Class 1 estimate relies on detailed takeoffs by trade.
Once established, the breakdown becomes the basis for the schedule of values and change order pricing. Each trade package can be tracked against the budget, and deviations are visible early. For reliable takeoffs and pricing that follow this structure, see our construction cost estimating services and commercial estimating services.
Align your breakdown with CSI MasterFormat early to avoid scope gaps during buyout.
Hard Costs vs Soft Costs: What Goes in Each Column
Hard costs include site work, concrete, steel, MEP, finishes, roofing, elevators, and fire protection—everything physically built. Soft costs cover architecture and engineering fees, permits, impact fees, legal, accounting, insurance, financing, and owner's contingency. Land cost is neither hard nor soft; it is a separate line in the development budget.
Typical split: hard costs are 70–85% of total development cost; soft costs 15–30% depending on project type and financing. During early estimate classes, soft costs are often estimated as a percentage of hard costs, then detailed as design progresses. The table below shows common line items for each category.
| Category | Typical Line Items |
|---|---|
| Hard Costs | Site work, concrete, steel, MEP, finishes, roofing, elevators, fire protection |
| Soft Costs | Architecture/engineering fees, permits, impact fees, legal, accounting, insurance, financing, owner's contingency |
| Land Cost | Separate line in development budget |
| Contingency | Owner's contingency (soft), contractor's contingency (hard) |
For developers needing to model both columns accurately, our estimating for developers and feasibility study estimating services can help.
Soft costs can escalate quickly if permitting or financing timelines extend; carry a realistic contingency.
CSI MasterFormat Divisions: The Backbone of Trade Cost Breakdown
CSI MasterFormat divisions provide the standard taxonomy for organizing construction costs by trade. The 16 most common divisions used in commercial building estimates are: 01 General Requirements, 02 Existing Conditions, 03 Concrete, 04 Masonry, 05 Metals, 06 Wood/Plastics/Composites, 07 Thermal & Moisture, 08 Openings, 09 Finishes, 10 Specialties, 11 Equipment, 12 Furnishings, 14 Conveying, 21 Fire Suppression, 22 Plumbing, 23 HVAC, 26 Electrical, 27 Communications, 31 Earthwork, 32 Exterior Improvements, 33 Utilities. Each division has a cost per square foot contribution that can be benchmarked against similar projects.
Division 01 (General Requirements) includes general conditions, which are often broken out separately in the estimate. For early conceptual estimates when systems are not yet defined by trade, UniFormat is used to group costs by functional element. A takeoff by trade follows these divisions to ensure no scope gaps. This structure also supports elemental estimating for early budgets. To see how we apply these divisions, explore our construction takeoff services and elemental estimating services.
Use MasterFormat for detailed trade pricing and UniFormat for conceptual estimates; mixing them can cause double-counting.
General Conditions Cost Breakdown: What GCs Often Miss
General conditions are Division 01 costs: supervision, temporary facilities, permits, safety, cleanup, small tools, insurance, and bonding. They are the costs of running the job rather than building it, and they typically run 5–15% of hard construction cost depending on project duration, size, and union requirements. A general conditions cost breakdown is a schedule-driven exercise, not a percentage you guess at bid time. It is also the cleanest place to draw the line on hard costs vs soft costs construction: general conditions are hard cost, while the owner's design fees, permitting, and financing sit in soft cost.
- Supervision: project manager, superintendent, and project engineer salaries plus burden, charged by the week or month for the full contract duration.
- Temporary facilities: job trailer, temporary toilets, temporary power and water, dumpsters, scaffolding, and crane pads.
- Permits and fees: building permit, plan review, utility connection fees, and inspections.
- Safety and first aid: PPE, fall protection, fire extinguishers, signage, and safety officer time on larger jobs.
- Cleanup: daily housekeeping labor plus final cleaning before turnover.
- Small tools and consumables: hand tools, blades, bits, and fuel that never appear in a trade division.
- Insurance and bonding: general liability, builder's risk, and payment and performance bonds.
- Winter conditions: temporary heat, enclosures, and cold-weather concrete protection, including heated enclosures for concrete formwork pours in freezing weather.
General conditions are time-sensitive. Every week of schedule delay adds supervision payroll, trailer rent, and temporary utilities, so a two-month slip on a $5,000,000 job can add six figures to this division alone. Owners often target general conditions first when they need cuts, but underfunding them shows up as safety incidents, poor housekeeping, and weak supervision. When you compare your Division 01 number against commercial construction cost percentages by trade, remember that general conditions sit outside the physical divisions and should not be blended into Division 05 metals, Division 08 openings, or Division 09 finishes. If your schedule is still moving, pair this breakdown with construction scheduling services so the duration driving these costs is fixed before you bid. For GCs who self-perform or manage multiple packages, a disciplined general contractor estimating process keeps Division 01 aligned with the trades it supports.
Build general conditions from the schedule, not from a percentage. Duration, not square footage, is what drives supervision, temporary facilities, and cleanup.
Site Work and Earthwork: Division 31 and 02
Site work covers clearing, demolition, excavation, grading, cut and fill, erosion control, storm drainage, paving, and landscaping. In CSI terms it straddles Division 31 (earthwork) and Division 02 (existing conditions), with paving and utilities often broken out separately. For a commercial building, site work commonly runs 5–15% of total hard costs, but on sites with poor soils, deep utilities, or heavy rock it can exceed 20%.
Unit costs follow the quantity: cut and fill priced per cubic yard, paving per square foot, storm pipe per linear foot, and erosion control per linear foot of silt fence or per acre of blanket. Earthwork carries a waste factor of roughly 10–20% because excavated material swells when loosened and then compacts, so bank volume, loose volume, and compacted volume are three different numbers. A quantity takeoff for earthwork needs cross-sections and a cut/fill analysis, not just a site plan area. If you price off the plan footprint alone, you will miss haul-off, borrow, and the grading that makes the pad work. Specialists in sitework estimating and excavation estimating build these quantities from the civil sheets so the dirt number holds up at buyout.
Swell and compaction change the volume you pay for. Confirm whether the bid is priced on bank, loose, or compacted cubic yards before you compare numbers.
Concrete and Masonry: Divisions 03 and 04
Division 03 concrete covers formwork, reinforcing steel, cast-in-place concrete, slabs on grade, elevated slabs, and foundations. Division 04 masonry covers CMU walls, brick veneer, stone, mortar, reinforcement, and lintels. Together they are often 10–20% of hard costs for commercial buildings, and on parking structures or low-rise shell buildings they can run higher.
Concrete pricing splits into three quantities: formwork per square foot of contact area, reinforcing steel per ton or per linear foot, and concrete per cubic yard. Waste factors differ by material — about 5–10% for concrete, 3–5% for rebar, and 10–15% for formwork lumber, which is reused but cut and damaged. Masonry quantities are counted by wall area in square feet, with CMU often priced per square foot of wall and brick veneer per square foot of face area, plus mortar and grout by volume.
A takeoff for these divisions must account for openings, embedded items, and finishes. Door and window openings reduce wall area but add lintels, flashing, and jambs. Embed plates, anchor bolts, sleeves, and blockouts add labor that never shows on an area calculation. Formed surfaces that will be exposed architecturally carry a higher finish cost than surfaces that get furring or paint. Estimating concrete and masonry from measured quantities, rather than allowances, is what keeps these two divisions from swinging your bid.
Count openings and embeds separately. They reduce some quantities and add others, and treating them as a wash is how concrete and masonry bids go wrong.
Send Your Plans for a Trade-Level Cost Breakdown
Upload your drawings and specifications and we will return a division-by-division commercial construction cost breakdown, bid-ready in 48 hours, with same-day quotes available.
Structural Steel and Metals: Divisions 05 and 13
Division 05 covers structural steel and miscellaneous metals. Structural steel scope includes columns, beams, joists, metal deck, connections, fireproofing, and primer. You take off steel by member size and length, then convert to weight using the AISC manual or the fabricator's piece list. Connections and base plates are part of the fabricated weight. Metal deck is measured by square foot of floor or roof area, and fireproofing is measured by square foot of member surface area.
Unit costs follow different bases. Steel is priced per ton, material plus fabrication plus erection. Deck is priced per square foot. Fireproofing is priced per square foot of surface. Waste factor runs 3–5% for steel, but fabrication is per piece, so waste is minimal. Miscellaneous metals include stairs, railings, lintels, embeds, and cold-formed steel framing, and these are priced per piece, per linear foot, or per pound.
Structural steel is often 8–15% of hard costs for commercial buildings, but it can be higher for long-span or high-rise work. A takeoff requires member sizes, lengths, and connection details. Missing connection weight or fireproofing is a common source of error in a structural steel takeoff and in broader metals estimating.
Fireproofing is often carried in Division 07 or 09, not 05. Confirm where it sits in the spec before you price it.
Thermal & Moisture, Openings, and Finishes: Divisions 07, 08, 09
Division 07 covers roofing, waterproofing, insulation, sealants, and air barriers. Roofing is measured by the square, which is 100 square feet. Waterproofing and air barriers are measured by square foot of surface. Insulation is measured by square foot or by thickness and R-value. Sealants are measured by linear foot of joint.
Division 08 covers doors, frames, hardware, windows, glazing, storefronts, and curtain wall. Doors are counted by leaf and type. Hardware is priced per set. Glazing and curtain wall are measured by square foot of opening. Division 09 covers drywall, acoustical ceilings, flooring, painting, tile, and special coatings. Drywall is measured by square foot of wall and ceiling area, with deductions for large openings. Ceilings and flooring are measured by square foot. Painting is measured by square foot of surface.
Waste factors matter here: 10% for drywall, 5–10% for flooring, 5% for paint, and 2–5% for windows. These divisions are finish-heavy and can be 20–30% of hard costs for office and retail interiors. A drywall takeoff and an openings takeoff both depend on accurate wall and opening schedules.
Deduct openings over 10 square feet from drywall area, but add back for corner bead, jambs, and returns. Small misses add up across a large interior.
MEP Trades: HVAC, Plumbing, Electrical, and Fire Protection
Division 22 Plumbing includes fixtures, piping, water heaters, gas lines, sanitary, and storm. Division 23 HVAC includes equipment, ductwork, piping, controls, insulation, and testing and balancing. Division 26 Electrical includes service, distribution, lighting, devices, grounding, and low voltage. Division 21 Fire Suppression includes the sprinkler system, standpipes, fire pumps, and extinguishers.
Unit costs vary by basis. Plumbing is priced per fixture and per linear foot of pipe. HVAC is priced per ton of cooling or per CFM of air. Electrical is priced per device, per fixture, and per square foot of floor area. Sprinkler system cost is priced per square foot of protected area. Waste factors run 5–10% for pipe, 5% for duct, and 2–5% for wire.
MEP is often 25–40% of hard costs for commercial buildings, and can be higher for labs, hospitals, and data centers. A complete MEP takeoff requires equipment schedules, riser diagrams, and fixture counts. For ductwork alone, a duct takeoff depends on CFM, gauge, and fitting count.
Controls and testing/balancing are frequently left out of HVAC pricing. Add them as separate line items, not as a percentage of equipment cost.
Conveying Systems and Specialties: Divisions 14 and 10
Conveying systems sit in Division 14 and cover elevators, escalators, and moving walks. Elevators are the dominant line item: hydraulic (low-rise, up to roughly 5 stops), traction (geared or gearless, mid- and high-rise), and machine-room-less (MRL) units that fit a smaller hoistway footprint. Pricing is quoted per unit and per stop, so a 3-stop hydraulic car and a 10-stop gearless traction car are not comparable line items. For budgeting, estimators typically carry a lump sum per unit and adjust by number of stops, travel distance, and cab finish package.
Escalators are priced per unit and show up mainly in retail, transit, and high-traffic assembly spaces. Division 10 Specialties is a collection of small-scope items that add up: toilet accessories and partitions, lockers, signage, fire extinguishers and cabinets, awnings, and wall and corner guards. Take these off per fixture, per partition stall, or per square foot, depending on the item, and confirm the spec section before pricing.
Conveying systems are usually only 2–5% of total construction cost, but they carry long lead times and need early coordination with the structural and electrical packages. Elevator takeoff requires cab size, travel distance, number of stops, and door configuration. If the drawings do not show these, flag it as a scope gap before you finalize the commercial estimating services budget. On projects with heavy concrete hoistways and pits, coordinate the Division 14 takeoff with your concrete estimating services quantities so pit depth and slab openings are not double-counted or missed.
Conveying equipment is a small share of cost but one of the longest-lead packages. Lock in cab size, travel, and stop count before you release the budget.
How to Estimate Commercial Construction Costs: Step-by-Step
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Review drawings and specifications to define scope. Read the full set: architectural, structural, civil, MEP, and the Division 00–01 documents. Note alternates, allowances, unit prices, and any scope the drawings leave to the spec. A missed spec section is a missed cost. This is also where you answer what is a construction cost breakdown for your own bid: a division-by-division map of every scope item the contract requires.
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Perform a quantity takeoff by trade using CSI MasterFormat divisions. Measure each division separately so quantities stay traceable. Use quantity takeoff services when the set is large or when you need a second set of eyes on the measurements. A trade cost breakdown construction format keeps each division's quantities and pricing isolated, so a change in one scope does not contaminate the rest of the estimate.
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Apply unit costs (material, labor, equipment) with waste factors. Price material, labor, and equipment as separate components. Add waste: typically 5–10% on concrete and masonry, 10% on drywall and flooring, and 2–5% on structural steel. Waste varies by product and installer, so confirm it with your supplier or sub. For concrete formwork, waste and reuse cycles matter more than the raw concrete volume, so price formwork by contact area and expected number of reuses rather than by cubic yard of concrete.
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Add labor burden (taxes, insurance, benefits) to base wage rates. Labor burden is the difference between the base wage and the true hourly cost of a worker. It typically adds 25–45% to the base rate depending on trade, state, and union status. Never price labor at the bare wage.
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Add general conditions, overhead, and profit. General conditions cover supervision, temporary facilities, permits, cleanup, and equipment. Overhead and profit are separate and are usually carried as a percentage of hard cost.
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Add soft costs and contingency. Soft costs include design fees, permits, legal, financing, and owner costs. Contingency covers unknowns; size it to the design stage and the risk profile. Keeping hard costs vs soft costs construction clearly separated matters here: hard costs are the physical construction divisions, while soft costs sit outside the trade breakdown and should never be buried inside a Division 03 or Division 09 line.
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Summarize into a schedule of values and bid form. Break the total into billable line items that match the owner's format. This becomes the basis for pay applications and cost control. When you present the summary, commercial construction cost percentages by trade give the owner a quick sanity check: if Division 05 metals, Division 08 openings, and Division 09 finishes are wildly out of proportion to the rest of the building, something in the takeoff or pricing needs a second look.
The commercial construction estimating formula is: Total Cost = Σ (Quantity × Unit Cost) + General Conditions + Overhead & Profit + Soft Costs + Contingency. The level of detail and expected accuracy follow the AACE estimate class: a Class 5 order-of-magnitude estimate at concept carries a much wider range than a Class 1 definitive estimate at bid. Match your method to the construction cost estimating stage so the number is honest about its own precision.
Label your estimate with its AACE class. A Class 4 budget and a Class 1 bid are different documents with different expected accuracy, and the owner should know which one they are holding.
Worked Example: Trade Cost Breakdown for a 20,000 SF Office Building
Example only. The numbers below are illustrative and are not a quote or a benchmark for any specific project. They assume a 20,000 SF single-story office building with Class B finishes in a mid-Atlantic market, and a total hard cost budget of $200/SF.
Start with the gross area and the budget rate:
20,000 SF × $200/SF = $4,000,000 hard cost
Each trade line is a percentage of that $4,000,000. The math for each line is: percentage × $4,000,000. This is the trade cost breakdown construction format in practice, and it also shows what is a construction cost breakdown at the line level: every scope item tied to a division, a quantity, and a dollar figure.
| Trade / Division | % of Hard Cost | Cost |
|---|---|---|
| General Conditions | 10% | $400,000 |
| Site Work (Div 31/02) | 8% | $320,000 |
| Concrete (Div 03) | 12% | $480,000 |
| Masonry (Div 04) | 5% | $200,000 |
| Structural Steel (Div 05) | 10% | $400,000 |
| Roofing (Div 07) | 4% | $160,000 |
| Openings (Div 08) | 6% | $240,000 |
| Drywall & Ceilings (Div 09) | 8% | $320,000 |
| Flooring (Div 09) | 4% | $160,000 |
| Painting (Div 09) | 3% | $120,000 |
| HVAC (Div 23) | 12% | $480,000 |
| Plumbing (Div 22) | 6% | $240,000 |
| Electrical (Div 26) | 10% | $400,000 |
| Fire Protection (Div 21) | 2% | $80,000 |
| Elevator (Div 14) | 0% | $0 |
| Specialties (Div 10) | 2% | $80,000 |
| Overhead & Profit | 8% | $320,000 |
| Total | 100% | $4,000,000 |
Check the math: 0.10 + 0.08 + 0.12 + 0.05 + 0.10 + 0.04 + 0.06 + 0.08 + 0.04 + 0.03 + 0.12 + 0.06 + 0.10 + 0.02 + 0.00 + 0.02 + 0.08 = 1.00, so the percentages sum to 100%. Each line equals its percentage times $4,000,000, and the lines sum to $4,000,000. The elevator line is $0 because a single-story building does not carry one; on a multi-story building, Division 14 would take 2–5% and other trades would drop accordingly.
Read the table as commercial construction cost percentages by trade, not as fixed rules. Division 05 metals covers structural steel, misc metals, and joist and deck; Division 08 openings covers doors, frames, hardware, glazing, and storefront; Division 09 finishes covers drywall, ceilings, flooring, and painting. On this example, concrete at 12% assumes a slab-on-grade and spread footings, and a meaningful share of that line is concrete formwork for grade beams, piers, and slab edge. A post-tensioned deck or a structural frame change would move money between Division 03 and Division 05 without changing the total.
These percentages are illustrative and vary by region, scope, and date. A different finish class, a different structure type, or a different market will shift them. Use the method, not the numbers, as your starting point. If you are building this breakdown for a live bid, a budget estimating services package can give you the trade-level detail, and commercial estimating services can carry it through to a bid-ready schedule of values.
The percentages are a sanity check, not a price. Always rebuild the quantities from the drawings before you commit to a bid.
Commercial Construction Cost per Square Foot: What Drives It
Commercial construction cost per square foot is a benchmark, not a bid. It varies by region, building type, quality level, and site conditions. Use it for early feasibility and comparing design options, not for final pricing. The ranges below are typical U.S. hard costs only; soft costs add 15–30% on top.
- Warehouse: $80–$150/SF
- Office: $200–$400/SF
- Retail: $150–$300/SF
- Healthcare: $400–$800/SF
- Data center: $800–$1,200/SF
These figures shift with local labor rates, material markets, and date. A commercial building cost calculator uses these benchmarks as a starting point, but you must adjust for your specific location and scope. For a more reliable early number, run a feasibility study estimate that ties costs to your actual program.
You can also derive cost per square foot by trade: divide each trade's total cost by gross square footage. For example, if structural steel costs $600,000 on a 20,000 SF building, that trade is $30/SF. This cost per square foot by trade helps you spot outliers and compare bids. Developers often use this method to test pro formas; see our developer estimating services for how that workflow fits together.
Never bid from a cost-per-square-foot number alone. It is a sanity check, not a takeoff.
Common Mistakes in Commercial Construction Cost Breakdowns
- Omitting general conditions or underestimating their duration. General conditions cover supervision, temporary facilities, and cleanup. If you price them for 8 months and the job runs 12, you absorb the difference.
- Forgetting waste factors. Concrete, drywall, roofing, and finishes all carry waste. A 5–10% waste factor on drywall is normal; skipping it leads to material shortages and change orders.
- Using outdated unit costs or ignoring labor burden. Material prices move. Labor burden—payroll taxes, insurance, benefits—can add 30–50% to base wages. If your unit costs are from last year, your bid is already wrong.
- Double-counting scope between trades. Concrete and site work often overlap on foundations, slabs, and paving. One trade assumes the other is carrying it, and you pay twice.
- Not aligning the breakdown with CSI MasterFormat. If your estimate does not map to MasterFormat divisions, buyout packages will have gaps. Subcontractors bid what they see, not what you intended.
- Ignoring soft costs and contingency. Design fees, permits, and contingency are real. A 10–15% contingency on hard costs is common for early budgets.
- Failing to update the breakdown as design changes. A breakdown is a living document. If you do not revise it after each design iteration, your budget drifts.
A second-opinion review can catch these before they cost you. Our estimate review services audit trade breakdowns for gaps and double-counts. When changes do come, price them properly with change order estimating.
The most expensive mistake is a breakdown that looks complete but misses one trade's scope. Cross-check every division against the drawings.
When to Get a Professional Estimate or Takeoff
You need a bid-ready estimate for a hard bid or negotiated contract. A professional estimate gives you line-item pricing by trade, not a lump sum. That detail is what you need to buy out subcontractors and defend your number.
You lack in-house estimating capacity or software. If your estimator is stretched or you do not have Accubid, Bluebeam, or PlanSwift seats, outsourcing is faster than hiring. A commercial construction takeoff by trade gives you quantities you can send to suppliers and subs immediately.
You need a second opinion on a subcontractor's quote. A commercial construction takeoff by trade lets you compare quantities and unit costs, not just totals. That is how you catch a low bid that missed scope or a high bid that padded labor.
You are preparing a budget for a developer or investor. A commercial construction budget template is only as good as the numbers behind it. A professional estimate fills those numbers with current, local costs.
You need a quantity takeoff by trade for material procurement. A commercial construction cost for contractors depends on accurate quantities. If your takeoff is short, you buy twice and lose margin.
Scope Precision Estimate offers same-day quotes, bid-ready in 48 hours, and 20% off for new clients. Upload your plans through our get an estimate page, or learn more about outsourcing estimating services and our construction takeoff services.
If your bid deadline is inside a week, start the estimate now. Rush turnaround is available, but scope review takes time.
Frequently asked questions
What percentage of commercial construction cost is labor?
Labor typically represents 35–50% of hard construction costs on commercial projects, though the split varies widely by trade. Structural steel erection, MEP rough-in, and drywall hang and finish are labor-heavy, often 50–60% of the trade cost. Earthwork, asphalt paving, and concrete flatwork are more material- and equipment-heavy, with labor closer to 20–35%. Union versus open shop, prevailing wage requirements, and regional wage scales move these numbers significantly, so build labor from crew rates and production rates rather than applying a blanket percentage.
How do you calculate cost per square foot for a commercial building?
Divide total project cost by gross building area in square feet. For example, a $6,000,000 project on a 20,000 SF building equals $300 per SF. Decide upfront whether you are using gross area, rentable area, or net usable area, because the number changes. Also separate hard costs per SF from total cost per SF including land, soft costs, and contingency. For a full division-level build-up, see our commercial construction cost per square foot guidance in the linked commercial estimating services page.
What is included in general conditions?
General conditions cover the cost of running the job rather than building it. Typical line items include project management and superintendent salaries, temporary facilities, temporary utilities, site security, dumpsters and final cleaning, small tools, permits and fees, insurance and bonding, progress cleaning, and closeout documentation. On commercial projects, general conditions commonly run 6–12% of hard costs, and higher on short-duration or occupied-building projects. Missing items like winter conditions, hoisting, or extended supervision is one of the most common estimating errors.
What is the difference between CSI MasterFormat and UniFormat?
CSI MasterFormat organizes work by material and trade, using 50 divisions such as 03 Concrete, 05 Metals, and 26 Electrical. It is the standard for specifications, subcontracts, and bid packages. UniFormat organizes by building element or system, such as A Substructure, B Shell, and D Services, regardless of material. Estimators use MasterFormat for trade-level takeoffs and buyout, and UniFormat for early conceptual or elemental estimates when systems are not yet defined. Many budgets use both: UniFormat for the early square-foot model, MasterFormat for the detailed bid.
How do you estimate HVAC costs for a commercial building?
Start with the system type, such as rooftop packaged units, VAV with central plant, or VRF, then take off equipment, ductwork, piping, insulation, controls, and testing and balancing separately. Ductwork is typically priced by weight or by pound of sheet metal, with fittings and hangers added. Controls and TAB are frequently omitted from early budgets. For a detailed takeoff, our HVAC estimating services page covers how equipment, duct, and piping quantities are built from the drawings.
What is a typical waste factor for drywall?
A common waste factor for drywall is 10% on standard rectangular layouts, rising to 15% or more on buildings with heavy angles, curves, or many small rooms. Board is ordered in standard lengths, so cutoffs that cannot be reused become waste. Add separate allowances for joint compound, tape, corner bead, and fasteners, which are usually figured per square foot of board rather than by waste percentage. On large commercial jobs, ordering 12-foot or longer board can reduce waste compared with 8-foot sheets.
How do you account for soft costs in a construction budget?
Soft costs are the non-construction expenses: design fees, engineering, permits and impact fees, legal, surveying, testing and inspections, financing and loan interest, insurance, and developer overhead. They are usually carried as a percentage of hard costs, commonly 15–30% depending on project type and financing structure. Track them in a separate column from hard costs so the trade breakdown stays clean. Our budget estimating services page explains how soft costs and contingency are structured in a development pro forma.
What is an AACE Class 3 estimate?
An AACE Class 3 estimate is a detailed estimate prepared when design is roughly 30–60% complete. It uses defined line items and takeoffs for major trades rather than square-foot ratios alone, and it typically carries an expected accuracy range of about -10% to -20% on the low side and +10% to +20% on the high side, depending on the project. Class 3 estimates are commonly used for construction loan applications and GMP negotiations. Class 5 is the earliest, order-of-magnitude stage, and Class 1 is the most definitive.