Audit-to-retrofit · commercial real estate
We diagnose, plan, deliver and measure the impact of building transformation.
We modernise ageing Class B/C offices — from technical and ESG diagnosis, through the CAPEX plan, to delivery and ongoing oversight of the data. One partner instead of five.
Problem
Three things we hear most often.
The owner of an ageing office doesn't need another installation contractor. They need a partner who joins diagnosis, decision and delivery into one process.
„We don't know what to invest in first.”
We order CAPEX priorities and separate real impact from cosmetics.
„We don't have data we can trust.”
We assess data quality and system integration — the foundation of any sensible retrofit.
„We don't want to burn CAPEX on the wrong retrofit.”
We build a business case with options and payback before you spend a single zloty.
Market context
The real estate market is polarising.
Modern, low-emission assets gain value. Older buildings carry a brown discount, regulatory pressure and rising tenant expectations.
of investors observed a decline in value of assets failing ESG expectations (76% said sustainability influenced their investment decisions).
źródło: JLL
share of retrofit in completed European office projects in 2024 — with office construction down 24% from its 2020 peak.
źródło: JLL
the revised EPBD (2024) and CSRD/ESRS reporting obligations raise the importance of trustworthy building data.
źródło: European Commission
Four pillars
Diagnosis. Decision. Delivery. Data.
Diagnosis
We understand the asset better than a classic contractor.
Decision
We help set CAPEX and investment priorities.
Delivery
We turn the plan into execution and quality control.
Data
We measure the impact and support further optimisation.
Market gap
Not an integrator. Not an auditor. Not an installer.
The market is fragmented — each player does only part of the process. Our edge is joining the whole into one accountability.
| BMS integrator | ESG auditor | Installation firm | NESTIUM | |
|---|---|---|---|---|
| Technical audit | yes | partly | rarely | yes |
| ESG / certification review | rarely | yes | rarely | yes |
| CAPEX prioritisation | limited | partly | rarely | yes |
| Retrofit coordination | partly | no | yes | yes |
| Post-delivery monitoring | sometimes | no | rarely | yes |
| Investment language | weak | medium | weak | strong |
| End-to-end model | no | no | no | yes |
Methodology
Our own framework, not generic slogans.
The client doesn't buy a report — they buy an assessment, a score and a priority map. Our tools order the conversation and make the service hard to compare on price alone.
ESG Tech Audit Method
The backbone of asset diagnosis — technology, data, ESG, CAPEX in one.
Retrofit Readiness Score
A building's readiness for modernisation, legible to the board.
Asset Data Maturity Score
Quality of data and level of system integration.
90-Day Quick Wins
Low- and mid-cost actions with the fastest payback.
Trust and standards
Anchored in recognised market standards.
For us standards are the language of the institutional conversation and a frame for assessing the asset — not a certification claim. We prepare the building for certification and work with formal assessors.
A technology-agnostic, but partner-enabled model: a network of technology, certification and delivery partners strengthens execution without limiting the independence of our recommendations.
Start with an audit
An audit isn't the cost of a report. It's the cost of a better decision.
The discovery call takes 30 minutes. We establish the state of the asset, the main risks and a sensible first step — no commitment.
- 0130-minute call
We get to know the building, the goals and the main pain. No corporate deck.
- 02Initial diagnosis
We point out the gaps and a possible audit scope fitted to the asset.
- 03Entry proposal
ESG Tech Audit or a diagnostic workshop — with a clear outcome in 30–45 days.