Understanding Automatic Takeoffs & Reviewing Auto-Generated Takeoffs

Automatic takeoffs are designed to accelerate the estimating process by identifying quantities directly from uploaded drawings. However, accuracy does not come from automation alone, it comes from understanding how those takeoffs are generated and applying a structured review process.

This article explains how automatic takeoffs are created and how to properly evaluate, adjust, and validate the results before using them for estimating.

How Automatic Takeoffs Are Created

For this example, the drawing Extended Design – First Floor Plan (A1.1X) is opened inside the takeoff tool in Contractor Foreman.

As soon as drawings are uploaded, the system analyzes the plan and automatically generates three primary groups within the Legend:

• Spaces
• Objects
• Walls

These groups are created based on how the software interprets drawing boundaries, symbols, and annotations. No manual input is required at this stage.

Reviewing Spaces: Footprint vs. Rooms

Begin the review process with Spaces.

Footprint

When the Footprint option is enabled, the system displays what it believes to be the total project area. This boundary is generated by identifying the outer limits of the structure on the drawing.

The footprint provides a fast baseline, but it is only a starting point. It must always be reviewed.

In this example, part of the front porch or deck is either partially included or excluded. This indicates that the automatic takeoff needs adjustment.

Rooms

When the footprint is turned off and Rooms are enabled, the system displays individual spaces grouped and labeled based on the drawing data. These may include areas such as:

• Dining room
• Kitchen
• Hallways
• Connected living spaces

All room boundaries and labels are generated automatically. At this point, the role shifts from creating takeoffs to reviewing them.

The Review Mindset: Supervision, Not Rebuilding

Automatic takeoffs change the workflow. You are no longer starting from scratch, you are supervising work that has already been done.

A best practice is to:

1. Turn off all detected elements
2. Enable them one at a time
3. Review each item critically

This approach makes errors easier to identify and correct.

Reviewing Rooms Individually

Each room should be reviewed on its own.

• Unknown Rooms
  Some areas may be labeled as Unknown. By reviewing their location and context, these can often be identified correctly—for example, a closet—and renamed accordingly.
• Non-Usable Spaces
  Areas identified as rooms may actually represent shelving, mechanical zones, or other non-usable spaces. These should be corrected or excluded as needed.
• Boundary Overlaps
  In some cases, a room boundary may extend slightly into an adjacent area, such as a hearth or transition zone. These overlaps must be adjusted to reflect true usable space.
• Stairs and Exclusions
  Stair areas are commonly excluded from usable floor area calculations. If stairs are detected as rooms, they should be reviewed and modified to match estimating standards.

This step-by-step validation ensures that each space accurately represents what will be measured and priced.

Why Reviewing Automatic Takeoffs Is Critical

Automatic takeoffs provide speed, but accuracy comes from review.

By understanding how the system interprets drawings and carefully validating each detected element, you avoid:

• Incorrect quantities
• Overstated areas
• Missed exclusions

The most reliable takeoffs result from combining automation with informed human supervision.

Result

Understanding how automatic takeoffs are generated, and how to review and correct them, is the foundation of accurate estimating. Once spaces, objects, and boundaries are properly validated, the takeoff data becomes reliable and ready for refinement and export.

The next step is refining these takeoffs and preparing them for estimating workflows.