Construction Estimating Glossary: 50+ Terms Every Contractor Should Know

Estimating has its own vocabulary, and a lot of costly misunderstandings between contractors, GCs, and owners trace back to a term that meant one thing to one party and something slightly different to another. This glossary covers the terms that come up most often in bidding, pricing, and project cost conversations.

Bidding & Proposal Terms

Bid – A formal price submission in response to an Invitation to Bid, typically for competitively procured work where price plays a significant role in award decisions.

Proposal – A broader submission that includes pricing along with approach, qualifications, and team information, more common in privately negotiated work where the client weighs factors beyond price alone.

Invitation to Bid (ITB) – A formal solicitation from an owner or GC requesting price submissions for a defined scope of work.

Request for Proposal (RFP) – A solicitation requesting a fuller proposal, often used when qualifications, approach, and technical merit are weighted alongside price.

Bid Tab / Bid Tabulation – The organized comparison sheet a GC or owner uses to line up multiple bids side by side for evaluation.

Bid-Hit Ratio – The percentage of submitted bids that convert into signed contracts, a key performance metric for tracking estimating and sales effectiveness over time.

Lowest Responsible Bidder – A procurement standard, common in public work, requiring the lowest bid to also meet qualification, bonding, and past-performance thresholds, not simply be the lowest number.

Best-Value Procurement – An award process weighing price alongside technical approach, schedule, and qualifications, rather than awarding purely on lowest price.

Addendum (plural: Addenda) – A formal, documented change to bid documents issued after the original drawings and specs were released, often clarifying or revising scope.

Bid Bond – A financial guarantee submitted with a bid, assuring the owner the bidder will honor the bid and provide required performance bonds if awarded the contract.

Takeoff & Quantity Terms

Takeoff (Quantity Takeoff) – The process of measuring exact material and labor quantities directly from construction drawings and specifications.

Waste Factor – A deliberate, material-specific percentage added to a measured quantity to account for cuts, breakage, and installation loss.

Unit Cost – The cost of a single unit of material or labor (per square foot, per linear foot, per cubic yard), used as a building block for pricing larger quantities.

Digital Takeoff – Quantity measurement performed using specialized software directly on digital drawing files, rather than manual measurement on printed plans.

Scope of Work (SOW) – The written description of exactly what work is included in a bid or contract, ideally paired with a clear statement of what's excluded.

Cost & Pricing Terms

Direct Costs – Costs directly tied to the physical construction of the project: materials, labor, equipment, and subcontracted work.

Indirect Costs – Costs not tied to a specific piece of construction work but necessary to run the project or business: supervision, insurance, office overhead.

Overhead – The ongoing cost of running a construction business independent of any specific job: office rent, administrative payroll, insurance, and similar fixed costs.

Markup – The percentage added to direct costs to arrive at a selling price, intended to cover overhead recovery and target profit.

Profit Margin – Profit calculated as a percentage of the final selling price, not of cost, a distinction frequently and expensively confused with markup.

Fully Burdened Labor Rate – The true cost of an hour of labor, including base wage plus payroll taxes, workers' compensation, benefits, and other associated costs.

Contingency – A budgeted allowance for known-but-unquantifiable project risks, sized to the specific uncertainty a project actually carries.

Escalation – A budgeted allowance for anticipated cost increases in materials or labor between the time of estimate and the time of actual purchase or labor deployment.

Allowance – A budgeted dollar amount for a scope item not yet fully specified (a fixture selection, for example), to be finalized and reconciled later in the project.

Change Order – A formal, documented, mutually agreed modification to the original contract scope, cost, or schedule.

Unbalanced Bid – A bid where pricing is deliberately shifted between line items (overpricing early-completed work, underpricing later work) rather than reflecting accurate individual costs, a practice that can raise red flags during bid evaluation.

Estimate Types & Stages

Conceptual Estimate (Rough Order of Magnitude / ROM) – An early, low-precision estimate based on comparable project data, used for initial feasibility and go/no-go decisions before design is developed.

Preliminary Estimate – A more refined estimate developed once schematic or early design information exists, though still carrying a meaningful accuracy range.

Detailed Estimate – A precise, line-item estimate built from a complete quantity takeoff against finished construction documents, used as the basis for actual bidding and contracting.

Design Development (DD) Estimate – An estimate produced at the design development stage, once architectural and engineering details are substantially resolved.

Construction Document (CD) Estimate – The estimate produced from the final, permit-ready drawing set, the most accurate and detailed stage of estimating.

Feasibility & Development Terms

Feasibility Study – Early-stage analysis combining site assessment, cost estimation, and market analysis to determine whether a proposed project makes financial sense before land is acquired or design begins.

Hard Costs – Direct construction costs: materials, labor, and site work.

Soft Costs – Non-construction costs associated with a project: architectural and engineering fees, permitting, financing charges, and similar expenses.

Base Flood Elevation (BFE) – The regulatory elevation a structure's finished floor must meet or exceed in a designated flood zone, a significant cost driver in coastal and flood-prone construction.

Materials & Construction Method Terms

CMU (Concrete Masonry Unit) – Standard concrete block used as the primary structural material for exterior walls in most Florida and hurricane-prone construction.

Grouting – Filling reinforced masonry block cells with concrete for structural strength, a code-driven requirement in wind-load-critical construction.

PSI (Pounds per Square Inch) – A measure of concrete compressive strength, specified higher for structural or heavy-load applications than for standard residential flatwork.

Level 4 / Level 5 Drywall Finish – Industry-standard drywall finish classifications; Level 4 suits most flat or eggshell-painted walls, while Level 5 (a full skim coat) is used for glossy finishes or areas with strong raking light.

Elastomeric Coating – A thick, rubber-like, crack-bridging exterior coating commonly used on stucco in climates with significant thermal cycling, such as Florida.

HVHZ (High-Velocity Hurricane Zone) – Florida counties, primarily Miami-Dade and Broward, subject to the state's most stringent wind-load and impact-resistance building code requirements.

Risk & Contract Terms

Fixed-Price Contract – A contract type where the price is locked regardless of the contractor's actual costs, placing cost risk primarily on the contractor unless escalation clauses are included.

Cost-Plus Contract – A contract type where the owner pays actual project costs plus an agreed fee or percentage, shifting cost risk more toward the owner.

Guaranteed Maximum Price (GMP) – A contract structure setting a cost ceiling the contractor cannot exceed without an approved change order, while allowing the owner to benefit if actual costs come in under that ceiling.

Retainage – A percentage of each progress payment withheld by the owner until substantial completion, protecting against incomplete or defective work.

Liquidated Damages – A pre-agreed daily or weekly financial penalty for project completion beyond the contracted schedule, without requiring proof of actual damages.

Substantial Completion – The point at which a project is sufficiently complete for its intended use, typically triggering warranty periods and final payment milestones.

A Few Terms Worth Understanding Together

Several of these terms are commonly confused with each other, and the confusion itself causes real problems. Markup and margin are calculated differently and produce different numbers from the same inputs. Contingency and escalation cover related but distinct risks, uncertainty versus anticipated cost movement. Bid and proposal aren't strictly interchangeable, particularly in how formally structured the submission and evaluation process is expected to be. Understanding these distinctions precisely, rather than treating them as synonyms, is often what separates an estimator or contractor who prices accurately from one who doesn't.

Precise vocabulary reflects precise thinking. If any of these terms came up on your current project and you want a second opinion on how they apply to your specific estimate, that's exactly the kind of detail worth getting right before a bid goes out.