Which estimating method uses a formula based on the square footage of a project?

The cubic foot method estimates costs based on the volume of the project, which is determined by multiplying the area by the height. This approach is more complex and is typically used for projects where volume is a critical factor, such as in the construction of basements or large structures, rather than just surface area.

The unit price method estimates costs by calculating the price per unit of work (e.g., per square foot, per linear foot, or per unit of material) but does not specifically rely on total square footage alone. This method requires detailed breakdowns of labor and material costs for every component and is less straightforward than the square foot method for overall project estimation.

The quantity survey method involves a detailed take-off of all materials required for a project, providing a comprehensive estimate based on individual item quantities and prices rather than a generalized formula based on square footage. This method is highly detailed and labor-intensive, focusing on material costs rather than simply surface area.