Reading a Contractor's Bid: The Line Items That Hide Risk
Short answer
A contractor's bid should be judged by its scope, assumptions, allowances, exclusions, schedule and payment terms, not by the total alone. Hidden risk usually appears where required work is vague, omitted, carried as an allowance or left to later change-order pricing.
Owners usually compare bids by the bottom line. That number is the least informative part of the document. What matters is what is included, what is assumed, and what is deferred.
Start by normalizing scope
Before comparing dollars, build a simple matrix: every major scope on the left, every bidder across the top. Mark included, excluded, or allowance. You will almost always find gaps in site work, utilities, landscaping, appliances, and finish hardware.
A bid that is low because it excludes the driveway is not low.
Allowances are unpriced scope
An allowance is the contractor telling you they do not know the number yet. It is not a discount and it is not a commitment. Watch for:
- Flooring, tile, and countertop allowances set below the level shown in renderings
- Lighting and plumbing fixture allowances with no fixture schedule
- Site work or excavation allowances on a site with no geotech report
- "Utility connection" allowances before the utility has responded
Ask what quantity and quality each allowance assumes. If the answer is vague, the exposure is yours.
Unit prices tell you where the pain will come from
Unit prices for rock excavation, unsuitable soil removal, structural fill, and undercut are the contractor pre-negotiating the most likely overrun. Their presence is a signal, not a red flag. The question is whether the unit rate is reasonable and whether the baseline quantity is realistic.
General conditions and general requirements
General conditions cover supervision, temporary facilities, dumpsters, safety, and site management. They are usually a function of duration. That means a longer schedule is a more expensive project even if nothing else changes.
Look for:
- General conditions expressed as a monthly rate rather than a lump sum
- Whether the rate continues if the schedule extends for owner-caused delay
- Whether supervision is full time or shared across projects
Contingency: whose is it?
Contractor contingency inside a GMP is meant for the contractor''s own risk, not for owner scope changes. Owner contingency is separate and should sit outside the contract sum. Contracts that are silent on this reliably produce arguments later.
Clarify in writing:
- What events can draw on each contingency
- Who approves a draw
- What happens to unspent contingency at closeout
Exclusions and clarifications pages
This is the most important page in most proposals and the least read. Common exclusions worth pricing separately:
- Permit and impact fees
- Testing and special inspections
- Builder''s risk insurance
- Survey and as-built documentation
- Off-hours work, dewatering, temporary power
- Escalation beyond a stated date
Schedule as a pricing document
A bid with no schedule is an incomplete bid. Ask for milestone dates, assumed permit duration, assumed long-lead procurement, and what happens if a long-lead item slips. Switchgear, elevators, windows, and custom millwork drive more schedules than framing does.
A practical comparison checklist
- Same scope matrix across all bidders
- All allowances converted to defined quantity and quality
- General conditions shown as duration-based cost
- Contingency ownership and draw process stated
- Exclusions priced as owner budget lines
- Schedule with permit and procurement assumptions
- Escalation and price validity date
Next step
Run this once and the gap between two bids usually collapses to something small and explainable. That is when you are actually choosing a builder rather than choosing an incomplete document.
What a Complete Bid Should Show
A useful contractor bid should do more than state a total. It should identify the work included, materials or performance standards, allowances, exclusions, schedule assumptions, payment terms and the process for handling changes. If one of those elements is missing, the owner may be comparing prices without comparing the same scope.
The bid should also connect to the current drawings and specifications. Look for drawing dates, revision numbers and addenda. A proposal based on an older set may leave recent design decisions outside the price.
How to Compare Bids on Equal Terms
Start with a side-by-side scope review rather than the bottom line. Separate confirmed costs from allowances, alternates and owner-supplied items. Then identify where one contractor included work that another excluded or described vaguely.
Send each bidder the same written questions and ask for written clarifications. The goal is not to force identical formatting. It is to establish what each price covers, what remains uncertain and which assumptions could become change orders.
Line Items That Commonly Carry Hidden Risk
Allowances deserve close review because they are placeholders, not final costs. Confirm what each allowance covers, how it was calculated, whether labor and related materials are included, and how unused funds or overruns will be handled. An allowance for fixtures, for example, may not include delivery, installation, backing, wiring or finish repairs.
Exclusions can shift required work back to the owner. Look closely at demolition, temporary utilities, testing, permits, surveys, utility fees, erosion control, landscaping, cleanup and protection of existing conditions. An exclusion is not necessarily improper, but it should be assigned to a responsible party and accounted for in the project budget.
Broad phrases such as “by owner,” “as required” or “to code” need clarification. Ask who will select, purchase, coordinate and install each item. If the answer affects another trade or the schedule, document that dependency before signing.
Contract Terms That Change the Real Cost
The payment schedule affects owner risk even when the contract sum appears reasonable. Payments should follow defined milestones or verified progress, with clear treatment of stored materials, deposits and retainage. Avoid approving a schedule that puts payment materially ahead of completed work without documentation and appropriate protection.
Review how the proposal addresses change orders, concealed conditions, price escalation, delays and schedule extensions. The contract should state when written approval is required and how added cost and time will be calculated. Undefined markups or verbal authorization procedures make it harder to control the budget.
Confirm whether bonds, insurance, permits, supervision, overhead and contractor fee are included. If any are listed separately, determine whether they are fixed, percentage-based or subject to later adjustment.
Start With Scope, Not the Total
A lower total can reflect a smaller scope rather than a better price. Read the proposal against the drawings, specifications and written owner requirements. Mark every item that is omitted, qualified or described differently from the design documents.
Check whether the bid covers a complete result or only selected trade work. Site preparation, temporary protection, coordination, cleanup and closeout may be necessary even when they are not prominent on the drawings. Each item should be included, excluded or assigned elsewhere.
Separate Allowances From Confirmed Costs
An allowance is a budget placeholder for work or materials that are not fully selected or priced. It should not be treated as a fixed commitment. Ask what quantity, quality level, labor and related work the allowance assumes.
Compare allowances separately from the base scope. A bid with low allowances may look favorable initially but require additional owner funding after selections or field conditions are known.
Normalize the Bids Before Comparing Totals
A low total is not meaningful unless each contractor is pricing the same work. Build a comparison sheet with one row for every major scope: demolition, site work, structure, envelope, interiors, mechanical, electrical, plumbing, permits, supervision, insurance, testing, closeout and contingency. Enter each contractor’s price, then flag anything excluded, carried as an allowance or assigned to the owner.
Adjust the comparison for scope gaps rather than treating the submitted totals as equivalent. If one bid excludes utility work and another includes it, show the missing scope as a separate adjustment. Keep contractor contingency separate from owner contingency, and do not use an allowance as though it were a fixed price. The goal is not to manufacture a single perfect number; it is to make the remaining uncertainty visible before selection.
Separate Allowances, Alternates and Unit Prices
An allowance is a placeholder for work or materials that are not fully defined. Confirm what the allowance includes: material only, material and labor, delivery, taxes, equipment, overhead and profit, or some combination. Also confirm how savings and overruns will be handled and whether contractor markup applies when the final cost exceeds the allowance.
An alternate is a defined addition to or deduction from the base scope and should state the schedule effect as well as the price. A unit price applies when quantity is uncertain, such as unsuitable soil removal or repair by square foot. Each unit price should identify the measurement method, who verifies quantities and whether mobilization, disposal, supervision and markup are included.
Check Jurisdiction and Coastal Site Assumptions
Do not assume every Lowcountry project follows the same approval path. A property may be subject to municipal or county permitting, design or historic review, floodplain requirements, utility approvals, stormwater review and separate association standards. The bid should identify which permits, impact fees, review fees, bonds, inspections and agency coordination are included, excluded or assigned to the owner.
Site assumptions also need to be explicit. Ask what the contractor has carried for flood elevation requirements, drainage, dewatering, unsuitable soils, groundwater, access limits, tree protection, utility conflicts and wind-related assemblies. If drawings or reports do not resolve those conditions, the proposal should state the assumption, pricing method and process for authorizing additional work rather than burying the exposure in a broad exclusion.
Resolve These Items Before Contract Award
Before selecting a contractor, confirm the exact drawing and specification dates used for pricing; included addenda; start and completion assumptions; long-lead procurement responsibilities; temporary utilities and protection; testing and inspections; cleanup; commissioning; warranties; closeout documents; and permit responsibilities. Require written clarification for every qualification that changes the intended scope.
Then reconcile the proposal with the draft contract. Confirm how change orders are priced, what markup applies, whether general conditions continue during delays, how concealed conditions are handled, what insurance and bonds are required, and which allowances or alternates remain open. Incorporate accepted clarifications into the contract exhibits. Email explanations and interview notes should not be the only record of what the parties agreed to buy.
Common questions
- Should I accept a bid that does not reference the drawing set?
- Ask the contractor to identify the drawings, specifications, revisions and addenda used to prepare the price. Without that reference, it is difficult to confirm that the bid covers the current design.
- What should I do if the bids use different formats?
- Prepare a bid-leveling table organized by scope rather than by each contractor's format. List allowances, alternates, exclusions and clarifications separately so the differences remain visible.
- Can bid clarifications be added after contractor selection?
- Clarifications should be resolved and incorporated into the contract before work begins. If they remain outside the agreement, the owner and contractor may later disagree about which scope and assumptions control.