About CostMage

CostMage helps people understand what something costs, why it costs that amount, which variables change the cost, and where the numbers came from.

The product is sourced cost intelligence with transparent methodology. It is not a catalog of AI-generated estimates and it does not claim millions of calculators.

Pages are added only after evidence review. A larger internal research list exists for later work. That list is not a published sitemap.

CostMage is an independent publication. Citations are not endorsements or partnerships.

CostMage is the national unit-price, official-fee, and cited-range record. HomeCostMage is the separate home-project benchmark site. CalcMage is general arithmetic. A figure that belongs on one of those sites is not copied here to make a second page.

The Google notice dated 21 October 2026 said “Low-value content” and did not name a URL. These pages now add a decision workflow, a worked comparison that uses the figure already on the page, and a way to place a price you type against that figure. That work is not an AdSense approval.