Building performance audit: arbitrating your commercial assets in 12 weeks
Obligations to reduce energy consumption across the commercial building stock, requirements arising from labor law, RGAA compliance: a regulatory framework that applies directly to your asset.
Missing the -40% threshold in 2030 means exposing your asset to a 5 to 15% market value discount and to bank renegotiations blocked by the European taxonomy. Across 37 commercial audits conducted since 2022, we consistently measure the same gap: 18 to 25% of potential energy savings, but 0% if the operator does not take over the BMS. Kytom handles this complete audit in 12 weeks, from scoping to the Comex presentation, and delivers a 60 to 120-page report, a prioritization matrix and cost estimates within plus or minus 10% with ROI at 3, 5 and 10 years. Our grid cross-references the regulatory obligations to reduce energy consumption in the commercial building stock, NF S 31-080:2006 for acoustics and sustainable operation standards, with a 2 to 3-point uplift for compliance with class B or A of the ISO/TS 19488:2021 standard at building scale, or WELL. You then arbitrate with full knowledge of the facts: disposal, major renovation or 3/6/9 lease renewal. Here is how we structure this analysis, from the regulatory framework to financial steering.
the framework
On the usage side, a pilot conducted with occupancy sensors measured that offices were used on average only 2.3 hours per day: air quality, acoustics and lighting become decisive for tenant retention.
your gains
Three levers of impact on the P&L and asset value
The audit is not an exploratory CAPEX line: it is an arbitration tool that reads across three levels of your income statement and your balance sheet.
- Energy OPEX. Significant savings on energy OPEX are observed after implementing the priority recommendations, directly deductible from the triple net rent negotiated at the 3/6/9 renewal.
- CAPEX reallocation. A significant share of the works budget can be redirected toward the highest-impact packages: envelope, HVAC, LED lighting. For a 4 M EUR program, this can represent several hundred thousand euros directed toward 5-year ROI rather than 15-year cosmetic work.
- Asset value and green financing. A building audited and certified in operation generally shows a significant value premium on the local market, documented by the CBRE, JLL and OID studies on green assets. The report becomes a key element of taxonomy-driven bank renegotiations and SCPI/OPCI arbitrations on Core and Core+ assets.
On the usage side, the occupancy feedback collected on our redeveloped sites reports a noticeable improvement in acoustic and thermal satisfaction, which supports the rent premium against local competition.
points of vigilance
Instrumentation, seasonality, governance: three conditions of reliability
Three risk areas determine the credibility of the audit and warrant explicit scoping before signing.
- Instrumentation and representativeness. A reliable audit deploys CO2 and lux sensors, hygrometric probes and calibrated sound level meters across a sample of at least 30% of workstations. Below that, the weighted averages become unstable and the HVAC recommendations lose their metrological foundation.
- Seasonality of measurements. Thermal readings conducted in mid-season systematically underestimate winter and summer peaks. We calibrate the HVAC scenarios on reference data covering 12 rolling months, supplemented by 2 to 3 weeks of field measurements.
- Comex and operational governance. Without a Comex sponsor and without the operator taking over the BMS settings, savings cap below 10%. We formalize a post-audit operating charter, signed by the facility manager and the CFO, that locks in the time-stamped heating, ventilation and lighting settings.
These three conditions turn an audit report into an operational roadmap tracked over 24 months.
when to refrain
The two cases where a complete audit is not the right answer
Commercial honesty is part of the job: the Kytom building performance audit is not justified in two specific configurations.
Asset under 1,500 m² intended for disposal within 12 months. The depth of instrumentation is under-amortized over this surface area and this timeline. A regulatory energy diagnostic is more than enough to secure the buyer’s due diligence, for a budget five times lower. We then steer toward this shorter option, without billing an oversized engagement.
Major renovation already planned and budgeted (validated APD). If the final design is frozen and the project management is engaged, the audit loses its role as a decision-support tool and becomes redundant with the execution studies. It is better to concentrate the budget on rigorous commissioning and an instrumented handover of the technical packages, deliverables that we also handle.
Secondary assets in zone B/C. The revaluation linked to a voluntary operating certification remains marginal there (less than 2%) and the certification investment (50 to 120 k EUR) does not amortize on disposal. We then recommend a pragmatic regulatory trajectory, without voluntary certification, targeted only at the major energy items.
This analysis spares you from committing 60 to 120 k EUR of audit where a targeted engagement at 15 to 25 k EUR produces the same arbitration.
Method
- Scoping and documentary collection
During the first two weeks, our consultants conduct interviews with the real estate department, the facility manager and the CFO. We collect plans, leases, operating contracts and 24 months of utility bills. At the end of this phase, you receive an engagement note that locks in scope, deliverables and schedule. - Instrumented field diagnostic
Over three to four weeks, a pairing of an interior architect and a building services engineer conducts the instrumented visit. CO2 and lux sensors, hygrometric probes and sound level meters are deployed across at least 30% of workstations. The measurements cover envelope, HVAC, lighting, acoustics and air quality, on an occupied site, according to the acoustic standards applicable to office spaces. - Cross-referenced regulatory analysis
In parallel with the diagnostic, we verify regulatory compliance (articles R.4222 and following), ERP, RGAA accessibility, fire safety, asbestos detection before works and energy declaration. You receive a ranked gap table: critical issues to address immediately, non-conformities within 12 months, long-term optimizations. - Modeling of costed scenarios
Over three weeks, we model two to four works scenarios costed within plus or minus 10%. Each scenario shows its ROI at 3, 5 and 10 years, its impact and its effect on asset value. - Comex presentation and decision matrix
The final week is dedicated to the presentation. You receive a 60 to 120-page report, a prioritization matrix and a concise Comex presentation. Our consultants lead the arbitration session with the real estate department, the CFO and the asset manager to lock in the 24-month roadmap.
Frequently asked questions
How much does a Kytom building performance audit cost?
The budget ranges between 60 and 120 k EUR for a commercial asset of 3,000 to 15,000 m², including instrumentation, regulatory analysis and the Comex presentation. The price depends on the surface area, the number of floors, the age of the building and the targeted scope, knowing that the Effinergie+ standard requires commercial air tightness of Q4 ≤ 1.2 m³/(h.m²). On assets under 1,500 m² intended for disposal within 12 months, we steer toward a standardized energy diagnostic billed at 15 to 25 k EUR. The quote is set following a free half-day pre-audit visit.
Can the audit be conducted on an occupied site without disrupting operations?
Yes. Almost all of our post-audit projects take place on occupied sites and the audit phase itself causes no interruption of activity. The CO2 and lux sensors, hygrometric probes and sound level meters are deployed autonomously over 2 to 3 weeks. The instrumented visits are scheduled in coordination with the facility manager to preserve sensitive meetings. No relocation is required.
What deliverables are provided at the end of the 12 weeks?
Three main deliverables: a technical report of 60 to 120 pages covering envelope, technical packages, regulatory compliance and perceived comfort; a prioritization matrix ranking the critical actions, within 12 months and long term; two to four works scenarios costed within plus or minus 10% with ROI at 3, 5 and 10 years. Added to this are a measurement logbook, a regulatory gap table and a post-audit operating charter signed by the facility manager and the CFO to lock in the BMS settings.
Is the audit enough for the annual energy declaration?
The audit provides all the data required for the energy declaration (consumption by use, liable surface area, reference year) and proposes the -40% trajectory in 2030. Our consultants can handle the entry on the dedicated regulatory platform or train your internal teams. But be careful: declaration and renovation plan must be steered together, otherwise the assets concerned risk missing the 2030 threshold through a separation between declarative compliance and renovation CAPEX.
What is the average ROI observed after implementing the recommendations?
We regularly observe significant energy savings on the assets monitored 24 months after the audit, thanks to the implementation of the priority recommendations (LED lighting, BMS optimization, pipe insulation, HVAC programming), with an average ROI of between 3 and 5 years. Envelope works (insulation, joinery) show an ROI of 7 to 12 years, but constitute the main lever of asset value enhancement, particularly on prime assets. Without the operator taking over the BMS, however, savings cap below 10%.
