Public Corrections Log & Data Revision Register
Chris Cumbo Construction is committed to complete empirical accuracy and transparency. Because building material pricing, trade award rates, and statutory building regulations fluctuate continuously, we log all factual revisions, pricing benchmark updates, and code adjustments in this public register.
Factual Corrections
When a verified inaccuracy in an engineering calculation, span table, or statutory citation is identified, our editorial board corrects the text immediately and notes the specific change in this public ledger.
90-Day Cost Recalibrations
Quarterly updates to per-square-metre building costs, structural steel prices, and electrical trade rates are logged with date stamps, primary source references, and surveyor sign-offs.
Open Reader Inquiries
We invite licensed engineers, contractors, certifiers, and property owners to submit source-backed corrections or planning updates directly to our fact-checking desk.
Verified Editorial & Benchmark Revisions
A chronological record of modifications, data recalibrations, and regulatory updates across our technical manuals.
| Date | Article / Topic | Type | Nature of Revision & Primary Source | Auditing Specialist |
|---|---|---|---|---|
| 2026-09-20 | Construction Cost Per Square Metre | Cost Index | Recalibrated Q3 2026 residential benchmark: adjusted high-end architectural finish ranges (+4.2%) following audited supplier price updates for structural steel and double-glazed thermally broken window suites. | Marcus Vance (QS) |
| 2026-09-15 | Building Permits & DA Approvals | Code Update | Updated statutory setback thresholds and Complying Development boundary clearances to reflect revised National Construction Code (NCC) Volume Two livable housing compliance schedules. | Derek Hayes (Forensic) |
| 2026-09-08 | Steel Beam Installation Costs | Engineering Errata | Corrected universal beam (UB) flange bearing calculation for 200UB25 steel sections over a 4.8m clear span; updated minimum pad footing concrete compressive strength from 20MPa to 25MPa per ASTM C39. | Chris Cumbo (Lead) |
| 2026-09-01 | Kitchen Remodel Cost Breakdown | Trade Labor | Updated trade rough-in labor benchmark tables for licensed electricians and plumbers to match prevailing award rate adjustments and regional subcontractor shortages. | Marcus Vance (QS) |
| 2026-08-22 | Contractor Vetting Framework | Regulatory Link | Added direct links and validation instructions for state builder licensing registers and statutory home warranty insurance eligibility checks. | Derek Hayes (Forensic) |
| 2026-08-01 | Construction Loan Drawdown Milestones | Finance Audit | Clarified lender progress inspection trigger points between the enclosed lock-up stage and fixing stage, detailing quantity surveyor certification requirements. | Marcus Vance (QS) |
Identify an Outdated Code or Pricing Variance?
We welcome corrections from certified building inspectors, structural engineers, quantity surveyors, and property owners. If you notice a cost metric or code reference that requires recalibration, submit your source documentation to our desk.