What does a site utilities estimate include?
Site utilities estimating covers Division 33 water main, sanitary sewer, force main and storm drainage, plus the Division 31 trench excavation, bedding, backfill and dewatering that support them. Quantities come from plan and profile sheets, measured by diameter and linear foot, with structures counted and elevations checked against rim and invert.
Our Professional Site Utilities Estimating
We build site utilities estimating the way a senior estimator builds a takeoff sheet: every line carries a unit, a measurement rule, and the arithmetic behind it. Water, sanitary sewer and storm drainage are measured separately, then reconciled at structures and tie-ins so nothing is counted twice or dropped between trades. Wage and material inputs come from public U.S. Bureau of Labor Statistics data, and an estimator reviews the finished workbook before it reaches you.
The deliverable is an Excel workbook and a PDF summary with marked-up drawing pages, so you can trace any quantity back to the sheet, station and detail it came from. We do not publish a fixed turnaround or fee; the fee is quoted per project after we review the plans and profiles.
| Work item | Unit | Measurement rule |
|---|---|---|
| Water main and force main | Linear feet | Centerline length by diameter and material |
| Sanitary sewer and storm pipe | Linear feet | Centerline length by diameter, slope and depth |
| Manholes, inlets, catch basins | Each | Count by type and depth range |
| Trench excavation | Cubic yards | Length × width × average depth |
| Pipe bedding and backfill | Cubic yards or tons | Layer thickness × trench length × width |
| Fire hydrants and valves | Each | Count by size and type |
| Concrete encasement and thrust blocks | Cubic yards | Volume from detail dimensions |
Site Utilities material takeoffs
Pipe is measured in linear feet along the plan centerline, with fittings, bends and tees counted by size and material. Water line estimating adds valves, fire hydrants and thrust restraint, and ductile iron pipe is priced by diameter and pressure class from the cut sheet. Trench volumes come from depth times width times length, with pipe bedding and granular backfill split into separate layers. Structures are counted, not measured: manholes by depth range, catch basins and inlets by type, valve vaults by size. Rim elevation and invert elevation from the profile set the depth for each structure, and that depth drives the price.
Site Utilities labor cost estimates
Labor is broken out by crew activity: trench excavation, pipe laying, structure setting, backfill and compaction, testing and tie-in. Hours are priced against published wage data for operating engineers, laborers and cement masons, then reviewed by an estimator. Equipment is listed separately by class, so a hoe, a loader and a plate compactor each carry their own rate. This keeps the sheet honest when a bid schedule asks for a unit price per linear foot rather than a lump sum.
Bid-ready site utilities cost estimates
Bid-ready sheets follow the bid schedule line by line: pipe by size and material, structures by type, excavation by depth band, and separate lines for mobilization, traffic control, utility potholing and dewatering. Our site utilities estimating includes a reconciliation pass against the plan and profile, so stationing, lengths and structure counts agree before you submit, and the same discipline carries into the asphalt and paving estimates support that often follow utility work on the same site. Where the drawings are silent on a detail, the sheet says so rather than filling the gap with an assumption.
What Is Included in Our Site Utilities Estimates?
Each estimate is organized so a reviewer can follow the chain from drawing to quantity to price. Our site utilities estimating separates gravity sanitary sewer main from force main, because the two carry different fittings, testing and bedding requirements. Storm drainage is measured on its own sheet with structure depths taken from rim elevation and invert elevation, and the trench volumes behind those runs are priced under the same excavation and earthwork estimating rules used on the rest of the site.
| Line | Quantity | Unit | Material | Labor | Equipment |
|---|---|---|---|---|---|
| 8-inch PVC sanitary sewer, 6 to 8 ft deep | 1,240 | LF | Pipe and fittings | Crew hours × wage | Hoe and compactor |
| 48-inch manhole, 0 to 8 ft deep | 6 | EA | Structure and rings | Setting crew | Crane or hoe |
| Trench excavation, 0 to 5 ft | 310 | CY | — | Laborer hours | Excavator |
| Granular backfill | 185 | CY | Aggregate delivered | Placement and compaction | Loader, plate |
| Fire hydrant assembly | 4 | EA | Hydrant, valve, pipe | Setting crew | Hoe |
Water, sewer and storm work items
The scope list covers the items that actually drive cost on wet utility work:
- Water main, service laterals, valves, fire hydrants and thrust restraint
- Sanitary sewer gravity main, force main, manholes and lift station components
- Storm drainage pipe, catch basins, inlets, headwalls and outlet structures
- Trench excavation, shoring and trench safety systems by depth band
- Pipe bedding, granular backfill, select fill and compaction
- Dewatering, utility potholing, traffic control and mobilization
- Testing, disinfection, flushing and tie-in to existing systems
Each item is tagged to its CSI MasterFormat division, Division 33 for utilities and Division 31 for earthwork, so the sheet maps cleanly onto a bid form.
Linear feet, structures, trench volumes and depths
Quantities are reported in the units the trade buys and builds in:
- Pipe in linear feet by diameter, material and slope
- Structures counted each, with depth ranges from the profile
- Trench excavation in cubic yards, split by depth band
- Bedding and backfill in cubic yards or tons
- Concrete for encasement and thrust blocks in cubic yards
- Restoration areas in square feet
Stationing is carried through so any length can be checked against the plan and profile. Where a run crosses a utility, the crossing is flagged for potholing rather than assumed.
Materials, labor, equipment and cost breakdowns
Every line splits into material, labor and equipment, with the unit cost and the extension shown. Material prices are national averages adjusted with published Producer Price Index data, so plastic pipe and ready-mix concrete move with their own indices rather than a single escalation factor. Labor uses published wage data by trade, and equipment carries its own hourly rate. The workbook shows the measurement rule beside each quantity, and the PDF summary carries the marked-up drawing pages.
Who Needs Our Site Utilities Estimating?
Site utilities sit between the earthwork package and the paving package, and the estimate has to survive review by both. Our sheets are built for the people who carry that risk: the subcontractor pricing the work, the general contractor leveling bids, and the developer checking whether the site budget holds. Each line carries its unit, measurement rule and source, which is what makes site utilities estimating defensible in a bid review rather than a lump sum to argue over.
Utility and sitework subcontractors
Utility subcontractors use the takeoff to price a bid schedule line by line and to check the engineer's quantities before committing to a unit price. Storm drainage estimating is where most bid risk hides, because structure depth and trench excavation volume swing widely with the profile. A depth-banded trench excavation takeoff shows where the cost steps up, and the tie-in to existing mains is listed as its own line rather than buried in a lump sum.
General contractors and home builders
General contractors use the estimate to level subcontractor bids and to spot a scope gap before award. When one bid excludes dewatering and another excludes shoring, the line-item sheet shows the difference in dollars. Home builders working on subdivision phases use the same format to compare utility cost per lot across phases, with water and sewer estimating services priced on the same pipe linear footage and structure counts in every phase.
Developers, architects and suppliers
Developers use the estimate to test a pro forma before design is complete, and to see how much of the site budget is trench, pipe or structure. Architects and engineers use the quantity sheets to check their own plan and profile against a second reading. Suppliers use the pipe and structure counts to prepare submittals and cut sheets, and a developer comparing packages can read the site utilities estimating scope against the earthwork and paving bids on the same basis.
Types of Site Utilities Projects We Estimate
The scope of an underground utility takeoff changes with project type, mainly in depth, structure count and the amount of tie-in work to existing systems. Our site utilities estimating adjusts the measurement rules to match, so a subdivision lateral and a plant force main are never priced from the same assumptions.
Residential projects
Subdivision work is dominated by linear feet: water main, sanitary sewer, storm drainage and service laterals, with structures at regular intervals. Shallow depths keep trench safety simple, but the lot-by-lot laterals and fire hydrant spacing add many small counts. Phasing matters, and the estimate is often organized by phase so a builder can price one section at a time.
Commercial buildings
Commercial sites concentrate utilities in a small area, with deeper trenches, more conflict crossings and tight tie-in points at the building. Utility potholing and traffic control become real line items. The estimate is usually tied to the building's site plan and coordinated with the paving and grading packages.
Industrial and infrastructure projects
Industrial work adds force main, lift stations, process piping and large structures, and trench safety moves to engineered shoring at depth. Cut sheets and as-built records matter here, because tie-in to existing infrastructure carries the highest risk on the sheet. The estimate separates process from site utilities so each can be bid and reviewed on its own.
Our Site Utilities Estimating Process
Every site utilities estimating assignment starts with the same question: which drawing governs the quantity? For water, sewer and storm work the answer is usually the plan and profile sheet, where stationing, invert elevation and rim elevation fix the pipe length and the depth of cut. We ask for the full civil set, the specifications, the geotechnical report and any utility potholing results before we open a takeoff file. Missing profiles or an unresolved tie-in to an existing main are flagged in writing rather than filled in with an assumption.
We read the drawings in the order the work is built: trench excavation, bedding and backfill, pipe, structures, testing and tie-ins. That sequence keeps the site utility quantity takeoff tied to the bid schedule the general contractor will actually price.
Submit drawings and specifications
Send the civil plans and profiles, the utility company standards, the specifications and the geotechnical report through our quote request page. Note the pipe materials allowed, the bedding class required by the spec and any owner restrictions on trench safety methods. If a lift station is in scope, include the mechanical and electrical sheets, because the structure, pumps, controls and vault are priced as separate packages. We confirm what we received and list any sheet or detail that is missing before takeoff begins.
Plan review and digital takeoff
We scale and measure each run on screen, then reconcile the measured length against the stationing printed on the profile. Pipe is taken off by diameter, material and depth band, because a 12-inch sanitary sewer at 14 feet of cover prices differently from the same pipe at 6 feet. Structures are counted individually: manholes, catch basins, inlets, valves, hydrants and vaults, each with its rim and invert elevations recorded. Trench dimensions come from the pipe outside diameter plus the bedding and shading allowance in the specification, and shoring or trench safety is measured by the linear feet of trench that exceeds the depth where the spec or OSHA-style tabulated data requires it. Where the profile shows a grade change that shifts earthwork between cuts and fills, we cross-check those volumes against our cut and fill estimates so the trench spoil and import lines stay consistent with the mass haul.
Cost calculation, quality checks and delivery
Quantities are priced with national average unit costs adjusted using published wage and price data, then reviewed by an estimator who checks the extensions, the waste allowances and the cut sheets for structures. A second pass compares the takeoff against the as-built or record drawings where they exist, and against the bid schedule line items to confirm nothing is double-counted. The workbook, PDF summary and marked-up drawing pages are delivered together, with assumptions and exclusions written on the summary so the numbers can be traced back to a sheet, a station and a rule.
Sample Site Utilities Estimate and Deliverables
The example below is illustrative and uses round unit costs, not a quoted price. Assumptions: 1,200 linear feet of 8-inch PVC sanitary sewer at an average 8 feet of cover; 900 linear feet of 12-inch ductile iron water main; 1,100 linear feet of 18-inch RCP storm sewer; trench width 3 feet plus pipe diameter; bedding and granular backfill per the specification; 4 feet of average trench depth for storm. Excavation volume for the sanitary sewer run works out to 1,200 × (3 + 0.67) × 8 = 35,232 cubic feet, or about 1,305 cubic yards. The table carries the line items a reviewer would expect to see in a quantity takeoff for this scope.
Water and sewer estimating services live or die on the structure count and the tie-in details. Each manhole is priced with its depth band, base, barrel sections, cone, frame and cover, and each connection to an existing main carries the tapping sleeve, valve and wet tap separately. Dewatering is measured only where groundwater is documented, and it is priced by the volume of water handled and the duration assumed, not by a lump sum. Line items follow the CSI MasterFormat division structure so the estimate drops into a bid schedule without renumbering.
| Item | Qty | Unit | Unit cost range | Extended range |
|---|---|---|---|---|
| Trench excavation, sanitary sewer, 8 ft avg depth | 1,305 | CY | $12 – $18 | $15,660 – $23,490 |
| 8-inch PVC sanitary sewer, supplied and installed | 1,200 | LF | $38 – $52 | $45,600 – $62,400 |
| Sanitary manholes, 8 ft depth band | 9 | EA | $3,200 – $4,600 | $28,800 – $41,400 |
| 12-inch ductile iron water main, supplied and installed | 900 | LF | $72 – $96 | $64,800 – $86,400 |
| Fire hydrant assembly with valve | 6 | EA | $3,800 – $5,400 | $22,800 – $32,400 |
| 18-inch RCP storm sewer, supplied and installed | 1,100 | LF | $58 – $78 | $63,800 – $85,800 |
| Storm catch basins and inlet structures | 14 | EA | $2,400 – $3,600 | $33,600 – $50,400 |
| Total | $274,060 – $382,290 |
Excel quantity takeoff sheet
The workbook carries one tab per utility system, with columns for sheet reference, station from and to, pipe size and material, measured length, depth band, structure count and the calculation used. Formulas stay live so a reviewer can change a trench width and see the volume update. A summary tab rolls the systems up by CSI MasterFormat division and matches them to the bid schedule line numbers.
Marked-up drawings
Every measured run is highlighted on the plan and profile pages with its length and station limits written beside it. Structures are circled and numbered to match the takeoff rows, and any segment we could not resolve is marked as a query rather than measured. The markup lets your estimator audit a single line item in minutes instead of re-scaling the whole sheet.
Itemized cost estimate
The PDF summary lists each line item with quantity, unit, unit cost, extension and the source of the cost basis. Labor, material and equipment are shown separately where the bid format calls for it, and mobilization, traffic control and testing are carried as their own lines. Assumptions, exclusions and open questions sit on the first page so nothing in the total is unexplained.
Software and Pricing Data We Use
A storm sewer material takeoff is only as good as the rules behind it. We record the pipe class and wall thickness from the specification, the bedding and haunch dimensions, and the number of joints, then measure the run in linear feet between structure centerlines rather than scaling the drawn pipe line. Catch basin and inlet structure counts come from the plan symbols and are cross-checked against the profile, since a structure shown on one sheet is sometimes omitted on the other. Division 33 pipe, structures and appurtenances are kept separate from Division 31 trench, bedding and backfill so the two scopes can be bid independently.
The chart below shows the Producer Price Index series for the materials in this scope, rebased to 100, and the wage table below shows the published wage inputs. Both are refreshed when the source data updates, so the figures move; the method behind them does not.
Takeoff and estimating software
We work in three tool categories: PDF and on-screen takeoff for measuring and marking the drawings, spreadsheet estimating for the quantity and cost build-up, and a cost database for unit rates. Digital takeoff keeps the measurement tied to the sheet it came from, which is what makes a line auditable later. The spreadsheet carries the formulas and the assumptions, so a reviewer can trace any total back to a measured length and a stated rule.
Regional material and labor pricing method
Unit costs start from national averages and are adjusted for location, prevailing wage requirements and project conditions such as depth of cover, groundwater and traffic control. Labor hours are priced using published wage data for operating engineers, laborers, cement masons and supervisors, and material prices are adjusted using the Producer Price Index series shown in the chart below. The wage table below lists the trades used in this scope. Every adjustment is written on the estimate so you can see which factor moved a line and by how much before you commit to a bid.
Material price movement, Oct 2023 to Sep 2026
| Occupation | 25th percentile | Median | 75th percentile |
|---|---|---|---|
| Operating engineers and equipment operators | $23.40 | $28.78 | $37.10 |
| Construction laborers | $18.57 | $22.66 | $28.72 |
| Cement masons and concrete finishers | $22.60 | $27.41 | $32.15 |
| First-line supervisors, construction trades | $30.48 | $38.42 | $48.78 |
Base wages before payroll taxes, insurance and benefits. Source: BLS Occupational Employment and Wage Statistics, national, all industries.
Why Contractors Choose Our Estimating Services
Site utility work punishes estimates that hide their assumptions. A utility trench excavation takeoff depends on trench width, depth band and the shading allowance in the specification, and any of those can swing the volume by a third. We show each of those inputs on the sheet, so a reviewer can disagree with a number and see exactly what changes. That traceability is the reason contractors send us drawings instead of asking for a lump sum.
We also keep the civil scope connected. Utility trenches, pavement replacement, grading and restoration are priced so they reconcile with the sitework estimates for the same project, rather than arriving as three unrelated totals. Where trench backfill ties into finished grades, we check the subgrade quantities against the professional surface grading estimating scope so the two sheets do not double-count cut.
Trade-specific expertise
We take off wet utilities by system, not by drawing sheet, so a water main run that crosses four plan sheets is measured as one continuous line with its fittings and valves. Inlet structure counts, stationing checks and invert-to-rim depth calculations are done the same way on every project. Division 31 trench and backfill quantities are kept separate from Division 33 pipe and structures, which is how most bid schedules are organized.
Quality control and clear assumptions
Every estimate gets a second review before it leaves: extensions are re-multiplied, structure counts are reconciled between plan and profile, and cut sheets are checked against the specified product. Assumptions and exclusions are written on the summary, including what we assumed for groundwater, disposal of spoil and traffic control. Where a drawing is ambiguous, we list the question rather than picking a number silently.
Turnaround, communication and revisions
Delivery dates are agreed in writing when we accept the project, based on the scope and the drawing set you send. If the plans are revised, send the revised sheets with the revision cloud identified and we will re-price only the affected line items and note what changed. Questions during review go to the estimator who built the sheet, so the answer matches the arithmetic. Start with the breakdown of construction site costs if you are still scoping the work, or send the drawings for a fee quoted per project.
Site Utilities Estimating Pricing
We do not publish a rate card, because a site utilities cost estimate is driven by how much of the underground work the drawings actually document. The fee is quoted per project after we review the plan and profile sheets, the utility plan, the details and the bid schedule. A single-family lot with three short service stubs and one fire hydrant is a different review than a 40-acre subdivision with off-site water main, a lift station and 60 structures. Send the drawing set through our sitework estimating services page and we will return a fixed fee against the scope we can see.
How quotes are calculated
We price the review, not the pipe. The quote reflects the number of sheets that carry utility information, the number of trades and disciplines the takeoff must be split into, the alternates and addenda in the bid documents, and the amount of interpretation the drawings demand. A plan set with stationing, invert elevations and a complete structure schedule quotes tighter than a set where the storm line stops at the property line and the tie-in is described in a note. The calculator below is a slab quantity takeoff for flat concrete work such as thrust blocks, valve vault pads and inlet bottoms; it takes length, width, thickness and waste percent, and returns area, cubic feet, net cubic yards and order quantity. It does not measure pipe, trench or structures, so those lines come from the drawing review, not from the calculator.
What affects price and delivery time
Sheet count and trade count move the fee most, followed by addenda issued close to the bid date that change pipe size, alignment or structure type. Delivery time runs longer when the utility plan and the profile disagree, when as-built or record drawings must be reconciled, and when the bid schedule asks for unit prices broken out by station rather than by lump sum. It runs shorter when the drawings are bid-ready, the structure schedule is complete and the geotechnical report states the bedding and backfill requirements. We confirm the delivery date with the quote, so you know the date before you commit. Our breakdown of site-wide construction costs covers the items that sit outside the utility scope.
Slab quantity takeoff
- Area
- 2,400 sq ft
- Volume
- 800 cu ft
- Net concrete
- 29.63 cu yd
- Order quantity
- 31.11 cu yd
Formula: length × width × (thickness ÷ 12) ÷ 27 = cubic yards. Thickened edges, footings and pump waste are taken off separately.
Site Utilities Estimating Across the US
Wage levels set the labor half of every wet utility estimating line, and they differ by region. A crew running a trench excavation in a high-wage metro carries a different loaded hourly rate than the same crew in a rural county, and public work adds prevailing wage requirements that change the rate again. We adjust labor using published U.S. Bureau of Labor Statistics wage data and material lines using the Producer Price Index, then an estimator reviews the result against the project's location and specification. Material delivery also moves the number: ductile iron pipe, precast manholes and valve vault assemblies are priced with freight to the site, and remote projects pay more. Climate and code editions change the detail, not just the price. Frost depth drives bury depth and therefore trench volume; local amendments to the plumbing and fire codes can change fire hydrant spacing and valve placement. Our earthwork quantity takeoff page explains how trench spoil and backfill volumes are separated from structural fill. One team in the U.S. handles all states, so the measurement rules stay the same from project to project while the labor and material inputs change with the location. Confirm the code edition in force with the local building department before pricing to it.
Frequently Asked Questions
How much does a site utilities estimate cost?
The fee is quoted per project after we review the plans, so it depends on the linear feet of water main, sanitary sewer and storm drainage, the number of structures, and how many plan and profile sheets carry the work. Depth of bury, shoring and dewatering requirements, and the amount of utility potholing data available all move the effort. Send the drawings and we return a written quote that states scope and fee before any takeoff begins.
How long does a site utilities takeoff take?
The delivery date is set when we quote, based on sheet count, pipe footage and how complete the profiles are. What drives it is the number of plan and profile sheets, the count of manholes, inlets and hydrants, and whether invert and rim elevations are legible enough to compute slopes without a request for information. We confirm the date in writing with the quote rather than promising a turnaround before seeing the drawings.
Do you estimate labor and material costs?
Yes. Each pipe, structure and excavation line carries a quantity, a unit, and a labor and material rate built from national average unit costs adjusted with published U.S. wage and price data, then reviewed by an estimator. Trench excavation is priced by cubic yard from width, depth and length, pipe by linear foot, and structures by each. The workbook shows the arithmetic on every line so you can trace any number back to its quantity and rate.
What drawings do you need?
Send the civil utility plan and profile sheets, the site grading and drainage plan, the utility company will-serve letters or tie-in details, and the geotechnical report if one exists. A bid schedule or the owner's unit price form helps us match line items. Cut sheets for specified pipe, valves, hydrants and structures reduce assumptions. If profiles are missing, we flag the affected slopes and invert elevations as assumptions for your review.
Can you use my estimate template?
Send your template with the plans and we confirm whether the estimate can be delivered in it. Most often we map our quantities into your CSI MasterFormat Division 33 and 31 line structure, keeping your unit columns and bid schedule order. If a template uses formulas or codes we cannot populate cleanly, we say so before starting and propose the Excel workbook and PDF summary we normally deliver.
Do you sign NDAs?
Clients can request an NDA before sending drawings, and the terms are agreed before plan review begins. Send the document you want signed and we will confirm the arrangement in writing. Drawings and specifications are used only to produce your estimate and are not shared outside the estimating team.
How do you handle trench excavation and bedding quantities?
We compute trench volume from plan length times the trench width and depth shown on the profile, then separate the bedding, haunching and granular backfill layers by depth band. Rock, unsuitable soil and dewatering are carried as separate lines rather than buried in the pipe price. Trench safety and shoring are quantified by linear foot where the depth exceeds the allowable cut, so the bid schedule shows the cost of depth instead of hiding it.
Can you price storm drainage structures by each and pipe by the foot?
Yes. Manholes, catch basins, inlets and junction structures are counted from the plan and priced each, including frames, covers and grates noted on the details. Storm sewer runs are measured by linear foot along stationing from structure to structure, with diameter, material and slope recorded per segment. That split lets you compare your bid schedule against the takeoff line by line.
How do you check pipe slopes and invert elevations?
For each run we record the upstream and downstream invert elevations from the profile, divide the fall by the horizontal length taken from stationing, and compare the result to the slope shown. Segments where the profile, plan and structure schedule disagree are listed as exceptions. Those exceptions go to you before the estimate is finalized, because a slope error changes trench depth and backfill volume across the whole run.
Do you estimate water main, fire hydrants and valves?
Water main is measured by linear foot by diameter and material, including ductile iron pipe and restrained joints where the details call for them. Fire hydrants, gate valves, valve vaults and thrust blocks are counted each from the plan and details. Fittings and tie-ins to existing mains are listed separately so the bid schedule reflects the work that carries the most risk.
How do you handle utility potholing and unknown existing utilities?
Potholing results are entered as known elevations and locations, and any crossing without pothole data is flagged as unverified in the takeoff notes. We do not assume a conflict clearance that the drawings do not show. Those flags tell you where to spend potholing budget before bid, and they keep test holes and utility coordination visible as separate bid items.
Can you break the estimate down by bid schedule unit prices?
Yes. The workbook carries a unit price column for each line so quantities can be dropped into a state, municipal or owner bid schedule without re-keying. Mobilization, traffic control, temporary water and erosion control are listed as separate items where the schedule requires them. The PDF summary shows the same totals so the field and office work from one set of numbers.
What does site utilities estimating include beyond the pipe takeoff?
Site utilities estimating covers the full buried scope: trench excavation by cubic yard, bedding and backfill by layer, pipe by linear foot, structures by each, and appurtenances such as hydrants, valves and thrust blocks. It also carries dewatering, shoring, potholing, traffic control and tie-ins as distinct lines. Every quantity is tied to a measurement rule and a drawing reference, so a reviewer can retrace the sheet.