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 Homestar Technical Clarification Rulings

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Technical Question Title Tool Version Date Released Credit Name Tool Category TC Link
Temporary Use of Existing EPDs Following Company Ownership Change March 2026 Link
Approved Ruling:

Where a company holding a valid Environmental Product Declaration (EPD) undergoes a change of ownership, the EPD owner is required under ISO 14025 and Programme Operator instructions to notify the Programme Operator of the ownership change and update the EPD as necessary.

To ensure continuity for Green Star and Homestar projects while this update process is underway, the New Zealand Green Building Council (NZGBC) issues the following clarification:

1. NZGBC will continue to recognise the existing (pre‑sale) EPD for use in Green Star and Homestar projects, provided that:

  • The underlying manufacturing process, data, inputs, and environmental performance have not changed, and
  • The only change is the legal ownership of the company.

2. Evidence requirements
To confirm that the product, processes, and data remain unchanged, the project team must supply a letter on the original (pre‑sale) company’s letterhead, signed by both:

This letter must explicitly state that:

  • The company has been sold or transferred to the new owner;
  • The only change is ownership;
  • The manufacturing process, product formulation, data used in the EPD, and all other EPD‑relevant factors remain unchanged.

3. Duration of acceptance:
NZGBC will accept the existing EPD only for the period required for the Programme Operator to update the EPD.
Once the Programme Operator issues the updated EPD, the updated version must be used for all ongoing and future submissions.