About
CostDay follows a construction bid total back to the sums that made it.
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Who reads it
Posts here start from a takeoff, a unit cost or a markup and end at a total you can check by hand. The readers are estimators who build a price, and owners who have to judge one.
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Where it stops
Running a site once work has begun, sending trucks or crews, and setting the fee for an accounting job are not covered here.
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Who signs the posts
Every post is signed CostDay Editorial Team. That is a group label. It is not the signature of an estimator, an engineer or a licensed contractor.
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Making a post
AI tools write every post. Code then traces each figure to a page named at the foot of the post, and a checker model from another AI maker reads the figures once. The text is not rewritten by hand. Sample numbers are always marked as examples.
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A clean start
CostDay has no link to whoever used this web address before, and it does not speak for them.