Office certification: WELL, BREEAM, HQE — the CFO/HR Director guide

The French commercial market is organised around three frameworks with distinct logics.

• The first framework, of British origin, created in 1990, is based on 10 environmental categories (energy, water, transport, pollution, materials, waste, health, management, ecology, innovation) and 6 levels from Pass to Outstanding. It serves as a reference for pan-European property companies.
• HQE (French framework): 14 targets structured into four families (eco-construction, eco-management, comfort, health), rated Good to Exceptional. A reference on public contracts and the French commercial sector.
• The third framework, of US origin, is based on 10 occupant-centred concepts (air, water, nourishment, light, movement, thermal comfort, sound, materials, mind, community), with levels from Bronze to Platinum.

Our reading differs from the dominant commercial discourse on this specific point: the three frameworks are not substitutable, they are complementary. The British and French frameworks assess the building, the third assesses the human experience. Claiming that the occupant framework replaces the building framework is a decision-making error we regularly see in COMEX: an asset certified Platinum on occupant experience but without a recognised building certification does not gain value at disposal, because pan-European property companies prioritise reading the British framework. For a headquarters targeting both asset value and employer brand, the dual building plus occupant framework certification is the rational choice. On our recent operations, the majority of commercial projects target HQE certification, with a growing share of dual building and occupant framework certifications for headquarters with strong employer brand ambitions.

The Kytom method in 5 steps: audit, framework selection, integrated design, low-carbon materials, evidence file

Certification is decided from the programme phase, never as a retrofit. Kytom applies a sequence calibrated to the usual timeline of its commercial operations.

1. Pre-certification audit (2 weeks): lighting measurements (500 lux threshold for administrative workstations), CO2 (target = 30 dB.
2. Framework selection and target level: decision in COMEX based on ESG strategy, tenant target and budget.
3. Integrated design (4 to 6 weeks): architect, MEP engineering firm, certification project manager and quantity surveyor work in a shared workspace. Environmental operations allow an acoustic tolerance of -5 dB on the regulatory target when thermal and environmental justification is provided.
4. Material and furniture selection: verified EPDs from the INIES database, VOC category A+ (decree of 19 April 2011), eco-designed furniture.
5. Site monitoring and evidence file: air and water sampling, acceptance by the appointed assessor.

The teams mobilise the France-Spain agencies for multi-site rollouts.

When certification is not the right lever. Below 800 sqm of usable area or for a residual lease term under 4 years, the fixed audit and project management costs (EUR 15,000 to 60,000) crush the ROI: green value does not capitalise over a short horizon. In these configurations, Kytom recommends instead a targeted audit and an indoor air quality improvement plan without a formal certification process. Likewise, an asset destined for demolition-reconstruction within 5 years does not justify an operational certification: the file effort is better reallocated to the future project.

For the CFO and Asset Manager: cost savings, asset valuation and ROI over 5-7 years

The CFO’s decision is read in cash flow and asset value, not in a label. Certified operations generate significant cost savings (heating, air conditioning, LED lighting, BMS), an asset revaluation and a measurable improvement in employee well-being. On a standard 5,000 sqm Paris office, the reduction in operating costs can represent several tens of thousands of euros per year, to be weighed against a limited works premium and controlled audit costs. The works plus audit ROI generally amortises over 5 to 7 years according to sector benchmarks (ARSEG, OID), excluding valuation at disposal.

HR Director reading. Recent feedback on the work environment in France places the quality of spaces in the top 3 criteria for employee engagement, which anchors the relevance of a certification process oriented towards health and comfort for the HR function. Reducing absenteeism is a documentable value lever in a COMEX file, to be quantified on the basis of the company’s own data.

Three points of attention: works premium, extended timeline, greenwashing risk

Certification exposes the project to three pitfalls that the CFO must anticipate ahead of the decision-making COMEX.

• Cost: certification generally represents 1 to 4% of the works budget, to which are added audit and project management costs varying by framework and surface area. Integration from the programme phase significantly limits this premium compared to a process started late in the detailed design phase.
• Timeline: targeting Excellent or Platinum extends the schedule by 4 to 8 weeks beyond the standard site timeline, due to intermediate audits and performance verifications carried out by on-site measurements once the building is delivered.
• Greenwashing: a poorly calibrated framework, an entry level on a CAC 40 group headquarters or a Base level on a premium asset, signals to the tenant and investor market a cosmetic approach. Environmental frameworks generally structure 3 performance levels per target (Base, High Performance, Very High Performance), and the ESG credibility threshold is at Very Good minimum and Very High Performance minimum.

Method

1. Opportunity audit
   Frame your ESG strategy and identify the appropriate framework and target level. This step cross-references your CSRD obligations, your regulatory requirements on the energy performance of the commercial stock and investor expectations. Deliverable: a costed framing note.
2. Pre-assessment
   Assess the points gained, to be won and out of reach according to the chosen framework. This detailed analysis avoids targeting an unrealistic level. Kytom systematically maps the 4 highest-impact work packages to secure 80% of the points.
3. Integrated design
   Integrate certification requirements into the programme and the works tender documents. Anticipate acoustics, air quality, lighting and low-VOC materials from the preliminary design stage. Starting the process after the tender documents generates EUR 110/sqm in additional costs.
4. Site management
   Track framework requirements during execution: waste sorting, material data sheets, intermediate measurements. A dedicated certification project manager runs the evidence matrix and leads a monthly committee with contractors and the client.
5. Submission and defence
   Compile the evidence file and present it to the certifying auditor (Cerway, BRE, IWBI). 65% of first-submission rejections come from incomplete documentation. An internal quality review secures first-time approval.
6. Performance Verification
   On-site measurements must be carried out 12 months after move-in (CO2, lux, acoustics, water). This step conditions the final issuance of the certificate. Plan it from the outset to avoid losing the label.