92 construction terms everyone should understand

TLDR:

Construction runs smoother when everyone speaks the same language. Use this glossary to prevent confusion on bids, plans, contracts, and jobsite communication.

The Plain-English Construction Glossary You’ll Actually Use

Construction has its own language. Even experienced pros run into unfamiliar terms, and for newer team members it can feel like drinking from a fire hose. This list is a quick-reference glossary you can share with your crew, office staff, or even clients to keep everyone aligned.

Regulations, Permits, and Compliance

1. ADA (Americans with Disabilities Act) — Accessibility requirements for buildings and public-facing spaces.
2. Building code — Rules that govern how structures must be designed and built for safety.
3. Zoning — Rules that define permitted land use (residential, commercial, setbacks, height).
4. Building permit — Official approval from the local authority to begin work.
5. Building line — Boundary/setback line inside which construction must occur.
6. Certificate of Occupancy (CO) — Approval that a building meets requirements and can be occupied.

Contracts, Legal, and Financial Terms

1. Bid — Price offered to perform a defined scope of work.
2. Alternate bid — A second option offered alongside the main bid (different method/material).
3. Bid bond — Financial guarantee a bidder won’t back out after submitting.
4. Allowances — Budget placeholders for items not fully selected yet.
5. Alteration — Change to an existing structure without increasing footprint.
6. Back charge — Charging a subcontractor for costs caused by their work or delays.
7. Contract overrun — Actual cost ends up higher than budget/contract amount.
8. Contract underrun — Actual cost ends up lower than budget/contract amount.
9. Cost-plus agreement — Client pays actual costs plus a markup/fee.
10. Fixed fee (lump sum) — One total price for the defined scope.
11. GMP (Guaranteed Maximum Price) — Contract cap; costs above the cap are typically contractor risk (unless scope changes).
12. Holdback / Retainage — Portion of payment withheld until completion requirements are met.
13. Lien — Legal claim against property for unpaid labor/materials.
14. Payment application (Pay App) — Formal request for a progress payment.
15. Penalty clause — Contract clause that charges contractor for late completion.
16. Performance bond — Financial guarantee that the contractor will perform as agreed.
17. Time and materials (T&M) — Billing based on actual labor time and materials used.
18. Unit rate bid — Pricing per unit (sq ft, linear ft, cubic yard) then totaling.

Insurance and Risk Management

1. Builder’s risk insurance — Coverage for a structure under construction and certain onsite materials.

Project Management, Administration, and Documentation

1. Appraisal — Property valuation for lending or insurance.
2. Construction budget — Planned costs for materials, labor, subs, overhead, etc.
3. Construction documents — Full set of plans, specs, schedules, contracts, and supporting docs.
4. Daily progress report — Day-by-day log of work completed, deliveries, issues, weather, etc.
5. Design-build — One contract where the builder handles both design and construction.
6. Draw — Progress payment (often used interchangeably with pay app).
7. Estimate — Cost prediction used to build a price and scope.
8. Field work order — Onsite direction for additional work outside original scope.
9. Final completion — All work done and punch list closed.
10. Invoice — Bill for work performed or materials supplied.
11. Milestone — Major checkpoint (foundation complete, rough-ins complete, etc.).
12. Punch list — Small corrective/finish items to complete before closeout.
13. Quantity takeoff (QTO) — Measuring quantities from plans to build an estimate/material list.
14. RFI (Request for Information) — Formal question seeking clarification on plans/specs.
15. RFP (Request for Proposal) — Request for detailed proposals (often larger projects).
16. RFQ (Request for Quotation) — Request for pricing on a defined scope.
17. Scope creep — Extra work added informally without pricing/approval.
18. Scope of work (SOW) — Written description of tasks, deliverables, and responsibilities.
19. Specifications (Specs) — Written requirements for materials, methods, tolerances, and standards.
20. Standing time — Paid time when crews can’t work due to blockers.
21. Substantial completion — Project can be used for intended purpose, with minor items remaining.
22. Duration — Time length of a task or the overall project.

Design, Drawings, and Visualization

1. As-built drawings — Drawings updated to reflect what was actually installed.
2. BIM (Building Information Modeling) — 3D model-based design and documentation process.
3. Blueprints — Traditional term for construction drawings.
4. BOQ (Bill of Quantities) — Line-item quantities and rates for a project scope.
5. CAD (Computer-Aided Design) — Software-generated technical drawings.
6. Drawings — All plan sheets (architectural, structural, MEP, site, etc.).
7. Elevation — Vertical view of a building face.
8. Plan view — Top-down view (floor plan).
9. Section drawing — Cut-through view showing layers and internal details.

Site Work, Earthwork, and Foundations

1. Bedrock — Solid rock beneath soil layers.
2. Backfill — Re-filling an excavation after install, typically compacted.
3. Cut and fill — Excavating in one area and filling another to adjust grade.
4. Excavation — Digging trenches/holes for utilities, foundations, grading.
5. Grade — Ground elevation level (above grade/below grade).
6. Staking — Layout marks that define building corners, offsets, and key points.
7. Foundation — Structural base supporting the building (footings, walls, slab).

Structural Elements and Concrete Work

1. Aggregate — Sand and gravel/stone used in concrete.
2. Beam — Structural member that supports loads across a span.
3. Bearing capacity — Amount of load soil or a structural element can safely support.
4. Bearing wall (load-bearing wall) — Wall that carries structural load.
5. Non-bearing wall — Partition wall that does not carry structural load.
6. Cement — Binder ingredient used to make concrete.
7. Concrete — Mix of cement, aggregate, water (and often admixtures).
8. Cure — Hydration process where concrete hardens over time.
9. Formwork — Temporary molds used to shape concrete.
10. Falsework — Temporary support systems used during construction.
11. Masonry — Brick, block, or stone construction with mortar.
12. Voids — Unfilled gaps in soil or concrete (intentional or unintentional).

Structural Loads and Framing Concepts

1. Dead load — Permanent weight of structure/materials.
2. Live load — Variable load (people, furniture, snow, vehicles).
3. Cantilever — Projection supported at one end only.
4. On center (O/C) — Spacing from the center of one framing member to the next.

Mechanical, Electrical, and Specialty Systems

1. A/C (Air conditioning) — Cooling equipment and distribution components.
2. Acoustics — Sound behavior and sound control strategies.
3. HVAC — Heating, ventilation, and air conditioning system.
4. CFM (Cubic feet per minute) — Airflow measurement (often used in HVAC).
5. Rough-in — Early stage installation of plumbing/electrical/HVAC before finishes.

Scheduling and Acceleration

1. Fast-tracking — Overlapping phases to shorten schedule (higher coordination risk).

Roles and Responsibilities

1. Architect — Designs buildings and may oversee compliance with intent.
2. Architect-Engineer (A/E) — Individual or firm providing architecture and engineering.
3. Project manager (PM) — Oversees scope, schedule, budget, coordination.

Bonus contractor terms that come up constantly

1. Change order (CO) — Written change to scope/cost/time approved by client.
2. Allowance overage — Cost above allowance amount that client typically pays.
3. Lead time — Time from ordering to delivery/availability.
4. Closeout package — Final docs: warranties, lien waivers, manuals, as-builts, CO, etc.

If you want to keep estimates, pricing updates, and project finances organized without juggling spreadsheets, you can explore Bolster or check out Construction Estimating Software.