Obsolete commercial asset: diagnose, arbitrate, revalue
Four dimensions of obsolescence to objectify before any trade-off
A commercial asset rated F or G suffers a significant discount on resale, sometimes several hundred euros per square metre evaporating before the first negotiation. For an asset manager, that is the equivalent of an investment committee starting out already losing. Since 2006, across 1200+ commercial projects supported, Kytom has observed that this risk is neutralised when the renovation/conversion/disposal trade-off is framed early, on the basis of figures rather than intuition. Our teams take charge of the obsolescence diagnosis across four axes (technical, energy, functional, rental), the CAPEX/IRR matrix that holds up in committee, then full-package (TCE) management through to turnkey delivery, on buildings of 500 to 15000 m², in 8 to 14 weeks of study. The regulatory framework is well known: a 40% reduction in energy consumption by 2030 compared to the reference year (base 100 to 60), then -50% in 2040 and -60% in 2050. The commercial sector also accounts for 17% of French final energy consumption. Here is how we turn this constraint into a value lever.
The framework
Contrary to the professional doxa that places energy performance first, our portfolio experience shows that functional obsolescence (grid, clear height, orientation) kills rental value faster than a poor EPC. An F EPC can be corrected with CAPEX; a rigid load-bearing grid at 5.40 m cannot. We therefore measure obsolescence across four cumulative dimensions, each objectifiable through quantified indicators:
| Axis | Trigger indicators |
|---|---|
| Technical | Ageing HVAC, no BMS, degraded weatherproofing, lifts not compliant with the safety standards in force |
| Energy | EPC E, F or G; consumption > 250 kWh/m²/year; no automated control whereas the BACS decree targets HVAC installations > 290 kW |
| Functional | Grid < 1.35 m, ceiling height < 2.50 m, single-orientation floor plates unsuited to flex office |
| Rental | Vacancy > 9 months, discount of 12 to 18% against comparables within 3 km |
The rate of regular remote working exceeds 30% in commercial functions, which disqualifies floor plates designed for full on-site presence. 62% of offices in the French commercial stock were built before 2000. We apply a weighted 40/30/20/10 grid that ranks these four axes and steers the trade-off scenario as soon as the audit ends, instead of starting from a preconceived works approach. On this type of panel, heavy renovation proved 35 to 45% more costly than demolition-reconstruction when the grid is rigid (< 5.40 m) and the clear height < 2.50 m.
When this 4-axis audit is not relevant. Below 1500 m² of net floor area and for an asset already rated C or better, a targeted technical diagnosis (HVAC + envelope) is enough, for a study cost divided by 3.
Your gains
Post-works positioning: certifications, taxation, occupied site
Post-works positioning rests on a triptych of certifications required by European core and value-add funds.
| Certification | What you secure |
|---|---|
| HQE Very Good | Environmental axis and quality of use, required by European core funds |
| Operational performance reference framework, Excellent level | Priority criterion for Anglo-Saxon asset managers operating in France |
| Occupant well-being reference framework | Air quality, NF S 31-080 acoustics, natural light |
The cost of obtaining them represents 1 to 3% of total CAPEX, for a rent premium estimated at 8 to 12% in the tight Paris and Lyon markets. Three points of attention complete the trade-off: regulatory stacking (a written prevention plan also mandatory for hazardous works determined by ministerial order, whatever the duration, possible ERP, accessibility, RE2020 for extensions, PLU, ABF easements in protected areas); taxation (an office-to-housing conversion can activate VAT at 5.5% but triggers a revision of the cadastral rental value); the occupied site (works spread over 12 to 20 weeks with phasing by zone and a written prevention plan mandatory for hazardous works determined by ministerial order, whatever the duration).
When triple certification is not profitable. On an asset < 2000 m² intended for a single non-institutional occupant (SME, professional practice), the rental premium captured by a single-user lease does not cover the additional CAPEX nor the recurring audits every 3 years. An HQE Good certification is then enough.
Method
- 360° technical and rental audit
In 2 to 3 weeks, our teams objectify the technical condition (HVAC, envelope, lifts compliant with the safety requirements in force), energy performance via a dedicated building energy audit, the EPC and BACS compliance, regulatory compliance applicable to workplaces (articles R4211 to R4217) and RGAA accessibility. Deliverable: a quantified audit report with weighted scoring across the 4 dimensions of obsolescence. - Rental benchmark within 3 km
In 1 week, we cross-reference the market reports of institutional brokers to position the asset against its comparables. Deliverable: a quantified market report (prime rents, average vacancy, estimated discount) that feeds the trade-off matrix. - Owner CAPEX/IRR matrix
We model three scenarios (heavy renovation, change of use, disposal) integrating CAPEX, target net IRR, residual vacancy and carbon impact according to the applicable environmental reference frameworks. Deliverable: a trade-off note that holds up in investment committee, with sensitivities at 5 and 7 years. - Design and full-package (TCE) consultation
Pricing in separate lots under qualifications and approach, with contractor consultation and an occupied-site prevention plan. Deliverable: a complete consultation file and a detailed schedule over 12 to 20 weeks. - Full-package (TCE) management and turnkey delivery
The referent Kytom agency manages the operation across all trades with weekly monitoring, milestone validation and snag clearance. Deliverable: a delivered building, handover report, as-built documentation file and support for post-works marketing.
Frequently asked questions
What are the four axes of obsolescence of a commercial building?
KYTOM assesses obsolescence across four dimensions. Technical: HVAC, BMS, waterproofing, NF EN 81-20 lifts. Energy: EPC rating, consumption in kWh/m²/year, BACS decree compliance above 290 kW. Functional: structural grid, clear height, single-aspect floor plates unsuited to flex office. Rental: vacancy rate and discount against comparables within 3 km. A weighted 40/30/20/10 matrix ranks these axes as soon as the audit concludes.
