Measuring the impact of change
Three converging challenges: economic, human, environmental
A major part of a commercial office project’s value is decided after delivery, not during construction: without a T0/T+12 month protocol, a fit-out costing 800 to 1500 EUR excl. VAT/m² remains an accounting gamble rather than a managed investment. Impact measurement is neither an optional CSR deliverable nor a complacency audit: it is the instrument that turns a fit-out expense into a documentable asset before the finance committee, the works council (CSE) and the real estate management. Since 2006, Kytom has applied to each operation a protocol built from the brief stage, cross-referencing quantitative data (sensors, counts, kWh) and qualitative data (interviews, internal NPS) across 8 to 12 indicators, to feed three parallel reporting streams: real estate, human resources and commercial property regulatory obligations.
Impact measurement simultaneously addresses the three requirements of a commercial office project, with no imposed hierarchy.
- Economic: actual occupancy data, collected via sensors, frequently reveals significant under-occupation that justifies a re-examination of post-delivery occupancy ratios. Space optimisation can be substantial when remote working becomes a lasting practice, opening up the possibility of re-densification and renegotiating leased floor areas in high-demand zones.
- Human: the regulatory framework requires the employer to carry out an ongoing assessment of working conditions, including the physical environment. Objective measurement documents this obligation and supports dialogue with the works council (CSE).
- Environmental: the commercial property sector accounts for 17% of national energy consumption. The commercial property decree (decret tertiaire), arising from the ELAN law (article 175), sets a trajectory for reducing energy consumption by 40% in 2030, 50% in 2040 and 60% in 2050 compared with a reference year from the 2010 decade (AICVF).
Our reading differs from common practice on one specific point: the profession still treats these three axes in silos (CFO on CAPEX, HR director on quality of working life, CSR separately), with three distinct providers and three incompatible reports. In practice, based on our recent experience, projects whose KPIs are consolidated into a single dashboard trigger corrective decisions in 4 to 6 weeks, compared with 4 to 6 months for separate sector-specific reports. Public reference frameworks provide the baseline for comparing shared indicators, supplemented by project ratios drawn from our recent experience.
Kytom’s 4-step protocol, from T0 to T+12 months
REFUS_REECRITURE : la source de remplacement n’est pas une source officielle vérifiable (URL de recherche Google), le référentiel cité n’est pas identifiable, et la norme NF DTU 35-1 mentionnée dans l’URL ne couvre pas l’acoustique des espaces tertiaires. Conservation du paragraphe original recommandée.
For the CFO and Asset Manager: converting measurement into asset value
Beyond HR or CSR reporting, impact measurement directly feeds two items of the asset’s financial performance.
- Avoided rent and OPEX: an actual occupancy rate measured at 55% over 2 weeks (vs 80% declared in theory) opens up a re-densification opportunity of 15 to 25% at the next lease renegotiation. On a 2,000 m² site in a high-demand Ile-de-France zone, re-densification can represent several tens to hundreds of thousands of euros in avoided rent per year, an order of magnitude to weigh against the cost of measurement, generally between 8 and 25 k EUR excl. VAT depending on the scope.
- Compliance and green value: a documented file with reference year, T0, T+12 and a quantified trajectory of -40% in 2030 protects the asset from a discount on resale. The commercial property regulations in force require the publication of results by site, which makes measurement no longer optional but enforceable.
- CAPEX/OPEX arbitrage: the T+12 report quantifies the share of the 20 to 35% energy savings attributable to each item (LED relamping, building management systems, behaviours), making it possible to prioritise residual CAPEX on levers with a 3-5 year ROI rather than on intuition-based decisions.
The logic is reversed compared with common practice: measurement is not a post-project cost, it is the element that makes the project enforceable and arbitrable before the investment committee.
Five methodological safeguards to make conclusions reliable
The robustness of results depends on observing five technical and regulatory precautions.
- Observation period: a period of less than 3 months overestimates the novelty effect; actual usage only stabilises after several months of effective occupation. The recommended minimum horizon is 6 months, ideally 12 months.
- GDPR compliance: presence sensors and named surveys require clear information for employees and prior consultation of the works council (CSE), within the legal obligations applicable to the information and consultation of staff representatives.
- Panel representativeness: a sample that is too small or an insufficient response rate weakens the conclusions; statistical study standards recommend significant coverage and participation to guarantee the robustness of the indicators.
- Contextual effect: a reorganisation, industrial action or market downturn can bias satisfaction and absenteeism indicators; documenting them in the T+12 report is essential for interpreting the gaps.
- Independence of the measurer: entrusting impact measurement to the provider who delivered the project exposes it to a self-assessment bias; Kytom recommends a contractual separation between project management and post-delivery measurement on operations above 50 k EUR excl. VAT.
