14.4 Documentation Records, Retention & Certification Renewal

Key Takeaways

  • All project documentation relating to certification and the achievement of measures must be retained on-site at the certified project for two years after certification is received.
  • The two-year retention period exists to outlast the 18-month window during which GBCI or any third party may raise a certification challenge.
  • EDGE Certified and EDGE Advanced certificates require no renewal once the final certificate is issued; only EDGE Zero Carbon expires.
  • Zero Carbon certificates expire after four years where the criteria are met fully on-site, and after two years where off-site renewable electricity or carbon offsets are purchased.
  • Registered and certified EDGE projects are public by default and listed in the project directory; owners may opt out in writing, but private projects may not then be marketed as registered or certified.
Last updated: August 2026

14.4 Documentation Records, Retention & Certification Renewal

Exam Focus: Sub-topics 6.10 "Documentation records — how long should records be kept, in which format can they be stored and who will need to access them" and 6.5 "Renewing/maintaining EDGE certification" close out Domain 6.0. Both have precise published answers, and both are commonly answered from invented professional-services convention rather than from the EDGE rules.


The Retention Rule

GBCI states it directly:

You'll need to retain all project documentation related to your certification, and the achievement of measures, on-site at your certified project for two years after receiving certification, to ensure that this information is available in case of a challenge.

Parse the four elements, because each is examinable:

ElementThe rule
WhatAll project documentation related to the certification and the achievement of measures
How longTwo years after receiving certification
WhereOn-site at the certified project
WhySo the information is available in case of a challenge

The "on-site" requirement is the one most often missed. This is not a rule about the Expert's or the Auditor's office archive — the record set must sit with the building. A challenge concerns the asset, and the asset's owner must be able to answer it.

Why two years, specifically

The retention period is derived, not arbitrary. A certification challenge may be initiated by GBCI or by any third party within 18 months of a project's certification. Two years of retention deliberately outlasts that 18-month window with margin. Knowing the derivation is the reliable way to keep the two numbers straight: 18 months to challenge, 24 months to retain.


Who Needs Access, and What the Record Should Contain

The parties who may need the record:

  • The owner or facilities team, who hold it and must produce it.
  • GBCI, if a challenge is raised or a quality question arises.
  • A third-party challenger, indirectly — the record is what answers them.
  • A future purchaser or lender, in due diligence on the asset's green credentials.
  • A future EDGE team, if the building later pursues Zero Carbon or is recertified after major renovation.

A complete record set therefore contains: the EDGE App output document (self-assessment), the design and as-built drawings relied on, the specifications and manufacturer datasheets supporting each claimed measure, purchase and delivery records for installed products, commissioning records, site audit photographs, the audit correspondence, and the certificates themselves.

Format

EDGE does not mandate a single storage format. What the purpose requires is that the record be complete, legible, retrievable and durable for the retention period, and that whoever holds the building knows where it is. A practical approach is a single indexed digital repository, mirrored to the facilities team, with the index organised measure by measure to match the audit checklist — because that is the structure any challenge will be argued in.

The handover failure mode

The common professional failure is straightforward: the Expert holds the only complete evidence pack, the engagement ends at certification, and the pack is never transferred. Two years later a challenge arrives and nobody at the building can answer it. Make formal transfer of the record set an explicit deliverable in the engagement letter, and confirm in writing who holds the on-site set.


Which Certificates Need Renewal

This is a clean three-row answer.

LevelRenewal
EDGE CertifiedNot required. Once the final certificate is issued it does not expire
EDGE AdvancedNot required. Same as EDGE Certified
EDGE Zero CarbonRequired. Expires after four years if the criteria are met fully on-site including on-site renewable electricity generation, or after two years if met by purchasing off-site renewable electricity or carbon offsets

The logic behind the split is worth carrying: EDGE Certified and EDGE Advanced assess the building's built features — the glazing, fixtures, systems and materials that are physically present and do not change on their own. EDGE Zero Carbon assesses operational performance over a reporting year, which can change with occupancy, management and procurement, so it must be re-evidenced.

Within Zero Carbon, note that purchased performance is re-proven twice as often as built performance. A project generating its own renewable electricity on site holds its certificate for four years; a project buying renewable electricity or offsets holds it for two.

What renewal involves

Renewal means resubmitting through the Zero Carbon Calculator in the Operations tab with fresh operational data for a qualifying reporting year, accounting for all energy including secondary fuels such as diesel and LPG, and demonstrating that the project still maintained at least 75% occupancy. The Zero Carbon fee schedule applies again.


The Preliminary Certificate Is the Exception That Expires

Do not confuse "final certificates do not expire" with "no EDGE certificate expires". The Preliminary Certificate expires 12 months after the project is practically complete, or 36 months after issuance, whichever comes first, unless GBCI grants a written exception on request. It is a design-stage instrument with a deliberately limited life, because a design that is never built should not carry an indefinite claim.


What Becomes Public

Registered and certified EDGE projects are considered public by default and are included in the public project directory. The data that may be listed includes: project name, project ID, physical address, date of registration, date of certification, projected energy, water and embodied energy savings, selected EDGE measures, owner name and project type.

GBCI may also use project data to create case studies, reference the project to media, or produce derivative works, potentially drawing on service providers, project team members, photographs, strategies and team quotations.

Opting out

An owner may opt out as a private project by submitting a written request from the project owner to GBCI. The consequence, covered in Section 11.4, is strict: a private project must not be marketed or represented to the general public as either a registered or certified EDGE project and may not use or display the EDGE trademarks or logos. It may communicate its status to government entities only for limited purposes — complying with building and tax laws and administrative proceedings related to land use entitlements.

Raise the public-or-private decision with the client before registration. A developer who intends to build a marketing campaign around certification and then opts for privacy has made two incompatible decisions.

Test Your Knowledge

How long must project documentation be retained after EDGE certification, and where?

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Test Your Knowledge

Why is the documentation retention period set at two years?

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Test Your Knowledge

A project achieved EDGE Zero Carbon by purchasing off-site renewable electricity to reach 100%. When does the certificate expire?

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Test Your Knowledge

Which EDGE certificates require periodic renewal once issued?

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Test Your Knowledge

A project owner submits a written request to GBCI to keep their project out of the public project directory. What follows?

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