Construction management glossary for contractors
Plain definitions of the terms that decide whether a job makes money
Construction management has its own vocabulary, and knowing it is the difference between billing what you are owed and eating the cost. This glossary collects the definitions a contractor actually uses day to day, from the estimate and its line items to progress billing, retainage and takeoff. Each term is explained in a sentence or two so you can look it up fast or quote it when you need to.
Construction management terms at a glance
| Term | One-sentence definition | What it is for |
|---|---|---|
| Estimate | The document that sets the total cost of a job: materials, labor, overhead and margin. | Agreeing price and scope with the client before work starts. |
| Line item | Each row of the estimate covering one task or material, with quantity, unit and price. | Breaking the job down and controlling it row by row. |
| Takeoff | The count of exact material and labor quantities pulled off the plans or a field measure. | Building an accurate estimate instead of a guess. |
| Buy list | The list of materials and quantities you actually order to build the line items. | Ordering the right amount and pricing it with suppliers. |
| Waste factor | The share of material lost to cuts and offcuts, usually 5% to 15% depending on the trade. | Ordering enough so the crew never runs short mid-job. |
| Labor cost | The cost of the crew hours needed to build each line item, by hour, day or unit. | Pricing your people, not just your materials. |
| Gantt chart | A chart that lays the tasks of the job across a timeline, with start, duration and sequence. | Planning dates and spotting slippage. |
| Milestone | A defined point of progress that closes a meaningful stage of the job. | Measuring progress and releasing a payment. |
| Percent complete | How much of the total work is actually in place at a given date. | Tracking progress and backing up a billing. |
| Daily log | The running record of what happened on site: work done, delays, changes and decisions. | Backing up your position and settling disputes. |
| Progress billing | Invoicing in stages as the work goes in, instead of one invoice at the end. | Keeping cash flowing through the job. |
| Retainage | A share of each payment (often 5% to 10%) the owner holds back until completion. | Owner leverage that the punch list gets finished. |
| Deposit | The client payment made before work starts, to fund materials and mobilization. | Starting the job without funding it yourself. |
| Change order | A priced, signed addition or change to the original scope of work. | Getting paid for the extras instead of absorbing them. |
| Punch list | The list of small items to fix or finish before the job is accepted. | Closing the job and releasing the final payment. |
Reference ranges (waste factors and retainage, for example) vary by trade, by contract and by state.
Estimate and takeoff terms
Estimate
The document that says what the whole job costs, adding up materials, labor, overhead and margin. It is the basis of the agreement with the client.
Line item
Each row of the estimate covering one task or material with its quantity, unit and unit price. Add up every line and you have the job total.
Takeoff
Counting the exact quantities the job needs, from the plans or a field measure. A good takeoff is what keeps you from buying too much or too little.
Buy list
The material list with quantities, pulled from the line items. It is what you send suppliers to price and what you actually order.
Waste factor
The share of material lost to cuts and offcuts, typically 5% to 15% by trade. A good estimate carries it instead of discovering it on site.
Scheduling and progress terms
Gantt chart
A chart that lays the tasks of the job across a timeline, showing start, duration and sequence. It is what you plan dates on and where slippage shows up first.
Milestone
A defined point of progress that closes a meaningful stage, such as structure complete. It is used to measure progress and to release a payment.
Percent complete
How much of the total work is in place at a given date. It is what backs up a progress billing.
Daily log
The running record of what happens on site: work done, delays, changes and decisions. It backs you up and settles disputes before they get expensive.
Payment terms
These four terms decide how and when the money reaches the job:
Deposit
Payment made before work starts, to fund materials and mobilization
Progress billing
Invoices issued in stages as the work goes in place
Payment milestone
The point of progress that, once reached, releases a payment
Retainage
The share (often 5% to 10%) the owner holds back until completion
Turn these terms into a real estimate
ObraMaestra builds the estimate with line items, takeoff, materials and labor in minutes. Just describe the job.
Create free quote