Corrections & Updates
We believe transparency builds trust. This page logs all corrections, data updates, and methodology changes made to our cost estimates. If you spot an error, report it here. We investigate reports within 5 business days.
| Date | Type | Description |
|---|---|---|
| 2026-04-14 | Bug Fix | Fixed material comparison pages showing identical costs for all states. The formula was reading only national-level material rates without incorporating state-specific labor rates, overhead, or regional cost adjustments. |
| 2026-04-13 | Data Audit | Removed 7 calculators with insufficient data quality: auto-insurance, home-insurance, pest-control, kitchen, bathroom, fence, and truck-rental. 15 calculators remain active with verified pricing data. |
| 2026-04-13 | Expansion | Added childcare, renters insurance, home warranty, and home security calculators. Expanded site to cover 4 verticals: Home Improvement, Insurance, Childcare, and Home Services. |
| 2026-04-08 | Bug Fix | Fixed material comparison pages for per-project calculators (HVAC, garage door, water heater, windows). Compare pages were incorrectly applying a per-square-foot multiplier to per-project cost data, producing inflated estimates. |
| 2026-04-08 | Enhancement | Added "How this estimate was built" trust boxes to all page templates (state calculators, national calculators, material comparisons, cheapest-states rankings, state cost overviews, and renovation combo pages). Shows data sources, formula summary, granularity notes, and last-updated date. |
| 2026-04-07 | Launch | Initial site launch with 14 calculators, 714 state-specific pages, material comparison pages, cheapest-states rankings, state cost overviews, and renovation combo pages. 869 total URLs. |
Our Correction Policy
- Response time: Estimate correction reports are investigated within 5 business days.
- Automated QA: Weekly data audits check for range coherence, outliers, cross-reference integrity, and sitemap consistency.
- Quarterly review: All calculator data is reviewed and refreshed against current BLS and industry cost data.
- Transparency: All corrections and updates are logged on this page with date, type, and description.
Found an error? Email contact@freecostcalculator.com with the page URL and what looks wrong. We take data accuracy seriously.