Elemental estimating organizes cost by what the building is made of and what it does—foundations, shell, interiors, services—rather than by CSI trade division. That structure is what you need at concept and schematic design, when the design is incomplete but you still have to carry a budget, compare structural systems, and decide whether to outsource the estimate. We produce UNIFORMAT II Level 1 through Level 3 cost models from your drawings and narrative, with quantities traceable back to the sheets.
- 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
If your project is further along and you need trade-division pricing for a bid package, our construction estimating services and material takeoff services cover that. Elemental estimates are different: they compare a steel frame against cast-in-place concrete, a curtain wall against storefront and precast, and make the first-cost, schedule, and floor-to-floor height trade-offs explicit. We also use elemental models as the basis for cost planning and feasibility studies and for value engineering estimating when a design option has to be tested against a target number.
An elemental estimator works from a cost breakdown structure, not a bid schedule. Quantities come off the sheets in square feet, cubic yards, and linear feet, then carry unit rates by assembly. Division 03 concrete footings, Division 04 masonry backup, Division 05 metals, Division 06 wood and plastics, Division 07 thermal and moisture protection, Division 08 openings, and Division 09 finishes roll up into the shell and interiors elements. Division 22 plumbing, Division 23 HVAC, Division 26 electrical, Division 31 earthwork, and Division 33 utilities roll up into the services and sitework elements. That roll-up is what makes an elemental cost analysis readable to a developer or an owner's rep.
Every model is delivered in Excel and PDF, organized by UNIFORMAT element, with the marked-up plan set showing where each quantity came from. Pricing is ZIP-code-adjusted for material and labor using RSMeans data, so the same model reprices correctly for a different market. Most projects turn in 24–48 hours; rush is available when a board meeting or a design milestone will not wait.
What elemental cost estimating covers
An elemental estimate measures the building as a set of systems, then prices each system with a unit cost that can be compared across design options. We take off quantities from the drawings you send—footings in LF and CY, wall area in SF, roof area in SF projected, equipment in each by capacity—and group them under the UNIFORMAT element they serve. The result is a cost model you can carry forward, adjust as design develops, and hand to a contractor or a lender without rebuilding it from scratch.
Structural System Comparison
Compare steel, cast-in-place concrete, and load-bearing masonry by foundation and superstructure cost, schedule, and floor-to-floor height.
SF · CY · TONExterior Closure Takeoff
Measure and price curtain wall, storefront, precast, brick veneer, and EIFS by area, including framing, insulation, and sealants.
SF · LFInterior Construction
Quantity partitions, ceilings, finishes, and specialties by element, with unit costs adjusted for ZIP code and labor market.
SF · LF · EAMEP System Selection
Price HVAC, plumbing, electrical, and fire protection systems by element, comparing central plant versus distributed options.
SF · TON · KWSite and Logistics
Estimate site preparation, utilities, paving, and logistics costs, including crane picks and laydown area constraints.
CY · LF · EAContingency and Escalation
Carry design and construction contingency as separate lines, and apply escalation to the midpoint of construction.
% · $Cost per SF Summary
Provide a PDF summary with cost per SF of gross floor area by element, suitable for board and design team review.
$/SFMarked-Up Plan Set
Deliver a marked-up plan set showing quantity origins by sheet, so every number can be traced and audited.
SHEETWhat every elemental estimating takeoff includes
- UNIFORMAT II Level 1–3 cost model by element and sub-element
- Quantity takeoff from concept, schematic, or design development drawings
- ZIP-code-adjusted material and labor unit costs from RSMeans data
- Structural system comparison: steel, cast-in-place concrete, load-bearing masonry
- Exterior closure comparison: curtain wall, storefront, precast, brick veneer, EIFS
- General conditions and contractor overhead and profit carried separately
- Design contingency and construction contingency shown as separate lines
- Escalation applied to the midpoint of construction, not bid date
- Marked-up plan set showing quantity origins by sheet
- Excel model with editable quantities and unit costs
- PDF summary with cost per SF of gross floor area by element
- Narrative assumptions and exclusions page
How we build an elemental estimate
- Classify the drawingsWe open your set in Bluebeam Revu and identify the design stage—concept, schematic, or design development. That determines how much is measured and how much is carried as an allowance. A concept set with no framing plan gets a structural system allowance priced per SF of floor area; a design development set with a framing plan gets member counts and steel tonnage taken member by member.
- Set the element structureWe build the UNIFORMAT II tree before taking off a single quantity: A Substructure, B Shell, C Interiors, D Services, E Equipment and Furnishings, F Special Construction, G Building Sitework. Each element gets its sub-elements—B10 Superstructure, B20 Exterior Closure, B30 Roofing—so quantities land in the right bucket and nothing gets counted twice.
- Take off quantities by elementFootings are measured in LF along centerline and converted to CY by section. Slab-on-grade is measured in SF and converted to CY at the specified thickness. Exterior wall area is measured on elevation with openings deducted, then broken into curtain wall, storefront, and opaque wall in SF. Partitions are measured in SF of wall face, not LF, so the finish cost on both sides is captured.
- Price with ZIP-adjusted dataWe apply RSMeans material and labor unit costs adjusted to your ZIP code, then layer the project-specific modifiers: union or open shop, prevailing wage if the project is publicly funded, winter conditions allowance, and access constraints for urban sites. Equipment costs are priced by capacity in each—rooftop units by tonnage, elevators by rise and capacity—using the same approach as our [equipment cost estimating](/equipment-cost-estimating/).
- Carry contingencies and soft costsDesign contingency is carried as a percentage of hard costs and shown separately from construction contingency. Escalation is applied to the midpoint of construction based on your schedule, not the bid date. General conditions are built from the schedule duration—temp power, temp heat, temp toilets, dumpsters, site fencing, and supervision—rather than carried as a flat percentage.
- Reconcile and back-checkEvery element gets a cost per SF of gross floor area, and we compare those against the range expected for the building type and market. If the superstructure comes in at a number that does not fit a steel frame of that bay size, we recheck the tonnage. The final model is delivered in Excel with live formulas, a PDF summary, and a marked-up set showing where each quantity came from.
What we need from you
- Drawing setConcept, schematic, or design development plans and elevations. PDF is fine; we mark them up in Bluebeam Revu.
- Gross floor areaSF by floor, or enough dimensions for us to measure it. This is the denominator for every cost per SF.
- Building type and useOffice, multifamily, warehouse, school, medical. Unit costs and element ratios change with occupancy.
- Structural systemSteel, cast-in-place concrete, load-bearing masonry, or wood. If undecided, tell us the options to compare.
- Exterior closure typeCurtain wall, storefront, precast, brick veneer, EIFS, or metal panel. Drives B20 cost more than any other shell item.
- ScheduleStart and finish dates, or duration in months. General conditions and escalation both depend on it.
- LocationZIP code or city. Material and labor pricing is adjusted to the market where the work will be built.
- Target budgetIf you have one, share it. We can flag which elements are driving the gap before you redesign.
Sample elemental takeoff format
This is the format our elemental models use. Quantities are illustrative and shown to demonstrate how each line is referenced back to the drawing set.
| Section | Line item | Qty | Unit | Ref. |
|---|---|---|---|---|
| A1010 | Standard strip footing 24" × 12", including formwork and dowels | 1,850 | LF | S-101 |
| A1030 | Slab-on-grade 5" thick over 6" gravel base and 10-mil vapor barrier | 42,000 | SF | S-102 |
| B1010 | Structural steel columns, beams, and joists, including connection allowance | 185 | TON | S-201 |
| B2010 | Curtain wall and storefront glazing, including framing and sealants | 8,400 | SF | A-301 |
| B3010 | TPO membrane roofing over polyiso insulation, including flashing | 44,500 | SF | A-401 |
| C1010 | Gypsum board partition, 5/8" Type X, both faces, including studs | 36,500 | SF | A-501 |
| D2010 | Water closets, lavatories, and urinals, including trim and carriers | 48 | EA | P-101 |
| D3040 | Rooftop units, 25-ton nominal, including curb and controls | 6 | EA | M-201 |
| E1010 | Commercial kitchen equipment, including exhaust hood and fire suppression | 1 | LS | K-101 |
| G2010 | Site paving, 4" asphalt over 6" aggregate base, including striping | 12,500 | SF | C-101 |
| G3010 | Storm drainage, 12" RCP, including manholes and catch basins | 850 | LF | C-201 |
Units of measure in an elemental quantity takeoff
Elemental quantities are measured in the units the design documents actually show. These are the units that appear in our models and how each one is derived from the drawings.
| Item | Unit | How it's measured |
|---|---|---|
| Gross floor area | SF | Measured to outside face of exterior walls, all floors, excluding unenclosed areas |
| Roof area | SF | Measured in plan projection, not slope surface; includes overhangs and penthouses |
| Exterior wall area | SF | Measured on elevation from finished grade to roof line, openings deducted |
| Footings and grade beams | LF | Measured along centerline; concrete volume derived from section dimensions |
| Cast-in-place concrete | CY | Length × width × depth divided by 27, with formwork taken separately |
| Structural steel | TON | Member weight from the framing plan, including connection allowance |
| Formwork contact area | SFCA | Contact area of forms against concrete, not plan area of the member |
| Doors, windows, fixtures | EA | Counted from the door schedule, window schedule, and fixture schedule |
| HVAC capacity | TON | Nominal tons of refrigeration from the mechanical schedule or narrative |
| Electrical load | kW | Connected load from the electrical one-line or panel schedule |
| Piping and ductwork | LF | Measured by size and material along the routing shown on the plans |
Worked example: elemental takeoff for a small office shell
This example shows how we take off one UNIFORMAT element—B Shell—for a single-story office building. The dimensions are illustrative and do not represent any specific project. All quantities are measured from a schematic plan and elevation set.
Step 1: Measure exterior wall area (Element B2010)
- Building footprint: 100 ft × 60 ft, perimeter = 320 LF.
- Wall height from finished grade to roof line: 12 ft.
- Gross wall area = 320 LF × 12 ft = 3,840 SF.
- Openings: storefront glazing 600 SF, two exterior doors at 20 SF each = 40 SF. Total openings = 640 SF.
- Net opaque wall area = 3,840 SF – 640 SF = 3,200 SF.
Step 2: Break down opaque wall by assembly
- Brick veneer with metal stud backup and rigid insulation: 2,400 SF.
- Precast concrete panels at the entry: 800 SF.
Step 3: Measure storefront glazing (Element B2020)
- Storefront system: 600 SF measured on elevation, including framing and sealants.
Step 4: Measure roof area (Element B3010)
- Roof plan area: 100 ft × 60 ft = 6,000 SF.
- Add 5% for overhangs and parapet coverage: 6,000 SF × 1.05 = 6,300 SF.
- Roof assembly: TPO membrane over 4-inch polyiso insulation.
Step 5: Apply waste factors (separate step)
- Brick veneer: typical waste factor 5%. 2,400 SF × 1.05 = 2,520 SF.
- Precast panels: typical waste factor 2%. 800 SF × 1.02 = 816 SF.
- Storefront glazing: typical waste factor 3%. 600 SF × 1.03 = 618 SF.
- TPO membrane: typical waste factor 10% for seams and cuts. 6,300 SF × 1.10 = 6,930 SF.
- Polyiso insulation: typical waste factor 5%. 6,300 SF × 1.05 = 6,615 SF.
Step 6: Price with ZIP-adjusted unit costs
- Brick veneer assembly: $18.50 per SF (material and labor).
- Precast panels: $32.00 per SF.
- Storefront glazing: $85.00 per SF.
- TPO roof system: $9.75 per SF.
- Polyiso insulation: $2.10 per SF.
Step 7: Calculate element costs
- Brick veneer: 2,520 SF × $18.50 = $46,620.
- Precast panels: 816 SF × $32.00 = $26,112.
- Storefront glazing: 618 SF × $85.00 = $52,530.
- TPO membrane: 6,930 SF × $9.75 = $67,568.
- Polyiso insulation: 6,615 SF × $2.10 = $13,892.
- Total B Shell cost = $206,722.
Step 8: Express as cost per SF of floor area
- Gross floor area = 6,000 SF.
- B Shell cost per SF = $206,722 ÷ 6,000 SF = $34.45 per SF.
This elemental breakdown lets you compare alternative wall assemblies or roof systems on a consistent basis. For example, substituting EIFS for brick veneer changes the B2010 cost and the structural load, which then affects the foundation takeoff.
What moves an elemental estimate for contractors
Relative impact on a typical estimate for this trade, based on estimator judgment. Select a bar for details.
Structural system
A steel frame with metal deck and concrete slab on deck prices differently from a cast-in-place concrete frame with flat plate slabs. The trade-off is not only first cost: steel may shorten the schedule and reduce foundation loads, while concrete may lower floor-to-floor height and improve vibration performance for labs and medical occupancies.
A steel frame with metal deck and concrete slab on deck prices differently from a cast-in-place concrete frame with flat plate slabs. The trade-off is not only first cost: steel may shorten the schedule and reduce foundation loads, while concrete may lower floor-to-floor height and improve vibration performance for labs and medical occupancies.
Curtain wall is the single largest shell cost driver per SF of wall area. Storefront glazing costs less but is limited by height and wind load. Precast, brick veneer, and EIFS each carry different backing, insulation, and sealant scope. The assembly choice also changes the structural dead load and the foundation size.
Every additional foot of floor-to-floor height adds exterior wall area, column and stud length, stair and elevator rise, and vertical MEP runs. On a ten-story building, a one-foot increase across all floors can add measurable cost in B Shell and D Services without adding a single square foot of rentable area.
A packaged rooftop unit system prices differently from a chilled water plant with air handlers, and a VAV system prices differently from a fan coil or VRF system. Electrical service size, distribution, and branch wiring follow the mechanical selection. These decisions are usually made after the elemental estimate, so we carry them as system-level allowances with the assumptions stated.
An urban infill site with no lay-down area carries crane permits, street closures, material hoisting, and longer general conditions. A suburban greenfield site carries more earthwork, utilities, and pavement but fewer access constraints. Sitework is Element G and is often the largest single source of variance between two sites with the same building.
A 24-month schedule carries more general conditions, more temporary facilities, and more escalation exposure than a 12-month schedule. Escalation is applied to the midpoint of construction, so a project starting in six months carries less than one starting in eighteen. Both are stated as assumptions in the model so you can see the effect of moving the start date.
Labor rates, material availability, and contractor competition vary by ZIP code. A model priced for a union market in a dense urban area will not reprices correctly for a right-to-work state without adjustment. We apply ZIP-code-adjusted RSMeans data and note the assumed labor basis, so you can see the effect of building in a different market.
Common scope gaps in elemental estimates
These are the items that most often go missing when an elemental estimate is built from a drawing set alone. Each one is caught by a specific check in our process, not by hoping the contractor carries it.
- General conditions carried as a flat percentage of hard costs with no tie to schedule duration. A 24-month project needs more supervision, temp facilities, and hoisting than a 12-month project. We build general conditions from the schedule and show the monthly carry.
- Escalation applied to the bid date instead of the midpoint of construction. On a project more than 12 months out, that understates material and labor escalation. We apply escalation to the midpoint and state the assumed rate.
- Design contingency blended with construction contingency. The two cover different risks—design development versus field conditions—and blending them hides which one is underfunded. We show them as separate lines with separate percentages.
- Owner-furnished equipment shown as a lump sum with no installation scope. Who sets it, who connects it, who commissions it? We list OFE separately and note the installation assumption, and we flag it for [change order estimating](/change-order-estimating/) if the scope shifts.
- Special inspections and testing buried in trade costs or omitted. Concrete, welding, soils, and fireproofing testing are separate line items with separate fees. We carry them under general requirements and reference the applicable code section.
- Roof screen walls, mechanical penthouses, and parapet heights that add area not captured in gross floor area. These show up on the roof plan but not in the floor area tabulation. We measure them separately and price them under B30 Roofing and B10 Superstructure.
- Fire protection and life safety systems not coordinated with the architectural layout. Sprinkler head counts, standpipe locations, and fire-rated assembly requirements depend on the occupancy classification and the adopted code edition. We carry a line for NFPA 13 sprinkler systems and note that the local building department must confirm the adopted edition.
- Vertical transportation omitted or under-scoped. Elevator count, capacity, and rise are driven by floor-to-floor height and occupant load, not by gross floor area. We price elevators by rise and capacity and include the machine room or machine-room-less assumption.
- Site utilities and off-site improvements not tied to the site plan. Storm, sanitary, water, and electrical service runs from the property line to the building are Element G and are often missing from a building-only takeoff. We measure them from the civil drawings and note any off-site work as excluded.
Elemental cost drivers by material and assembly
These are the material and assembly choices that move an elemental estimate the most. Each row shows the unit of measure and the cost implication.
| Assembly | Unit | Cost driver | Element |
|---|---|---|---|
| Structural steel frame | TON | Bay size, connection complexity, fireproofing | B10 Superstructure |
| Cast-in-place concrete frame | CY | Formwork contact area, reinforcement, curing | B10 Superstructure |
| Curtain wall | SF | Glass type, framing, wind load, seismic | B20 Exterior Closure |
| Storefront glazing | SF | Height, thermal performance, hardware | B20 Exterior Closure |
| Brick veneer | SF | Backup system, insulation, flashing, ties | B20 Exterior Closure |
| TPO roofing | SF | Insulation thickness, attachment, flashing | B30 Roofing |
| Gypsum board partitions | SF | Stud gauge, layers, sound and fire rating | C10 Interior Construction |
| Acoustical ceilings | SF | Tile type, grid, seismic bracing | C30 Interior Finishes |
| Rooftop HVAC units | TON | Efficiency, curb, controls, crane setting | D30 HVAC |
| Sprinkler system | SF | Hazard classification, head spacing, pipe size | D40 Fire Protection |
Codes and standards that affect elemental quantities
Model codes
The International Building Code (IBC) governs occupancy classification, construction type, and allowable area and height, which directly affect structural and fire protection quantities. The International Energy Code (IECC) sets envelope insulation and glazing performance, changing wall and roof assembly costs. The National Electrical Code (NEC) and International Plumbing Code (IPC) or Uniform Plumbing Code (UPC) dictate fixture counts and electrical loads. NFPA 13 governs sprinkler design. Confirm the adopted editions with the local building department.
Industry standards
ACI 318 for concrete strength and reinforcement, AISC 360 for structural steel design, and ASTM standards for materials like ASTM C578 for rigid foam insulation and ASTM D6878 for TPO roofing. SMACNA standards for duct construction and GA-216 for gypsum board application. NRCA guidelines for roofing installation. These standards influence material specifications and installation methods, which in turn affect unit costs.
Specification sections
An estimator must read the project manual for specific requirements. Division 03 sections (033000 Cast-in-Place Concrete, 031000 Formwork) define concrete strength and finish, affecting cost. Division 05 (051200 Structural Steel) specifies steel grade, connections, and fireproofing. Division 07 (072100 Building Insulation, 075400 Thermoplastic Membrane Roofing) details insulation R-values and membrane thickness. Division 08 (084100 Storefront and Curtain Wall) sets glazing performance and framing. Division 09 (092900 Gypsum Board) specifies board type and finish level. These details change quantities and unit costs.
Local amendments
Local jurisdictions often amend model codes, changing requirements for seismic design, wind loads, energy performance, and fire protection. For example, California's Title 24 energy code is more stringent than IECC, and Florida has specific wind-borne debris requirements. These amendments can add cost to structural, envelope, and MEP systems. Always confirm the adopted code edition and local amendments with the local building department before finalizing an elemental estimate.
Who uses elemental estimating for developers
Developers
You use the elemental model to test pro forma feasibility before committing to a design. Cost per SF by element tells you whether the shell and services fit the rent the market will bear. You carry the model forward as the design develops and compare each revision against the original basis.
Architects
You use the elemental model to compare design options without waiting for a contractor's bid. Structural system and exterior closure comparisons show the cost consequence of a design decision while it is still cheap to change. The marked-up set shows exactly which quantities came from which sheet.
General contractors
You use the elemental model as a preconstruction budget before the bid documents are complete. It gives you a cost per SF to carry into a GMP proposal and a structure you can convert to trade-division pricing when the CDs arrive. Our [quantity surveyor services](/quantity-surveyor-services/) support that conversion.
Owners and facility groups
You use the elemental model to set a capital budget and to check a contractor's proposal against an independent basis. Element-level costs let you question a number without rebuilding the whole estimate, and the model becomes the baseline for [project cost control and reporting](/construction-cost-control/) during construction.