ISO 21929-1 Maturity · Sustainability of buildings and civil engineering works
The sustainability of your building portfolio, measured against ISO 21929-1 and turned into an action plan.
10 themes, a 5-level scale. And the action that moves each level to the next.
The framework’s 10 themes, already written from L1 to L5. One company, one business unit, or 300 at once.
ISO 21929-1 Maturity · Sustainability of buildings and civil engineering works
10 themes, 5-level scale.
Nordhavn Industries
53 / 100
They measure their maturity with Datamensio
An example
This could be your situation.
Take one company as an example: three sites, three spreadsheets, no shared answer.
Nobody can consolidate.
Nordhavn Industries, 2,400 people in Hamburg, Lyon and Porto. A client asks where the group stands. Each site answers in its own spreadsheet, with its own scales.
Three weeks, a single base.
One ISO 21929-1:2011, Sustainability in building construction, Sustainability indicators, Part 1: Framework for the development of indicators and a core set of indicators for buildings assessment launched across all three sites at once, from the managers’ interview notes. The framework was already written, its 10 themes and levels L1 to L5 too.
Two costs avoided before being committed.
A score of 53 out of 100, with the gap concentrated on three themes. The AI companion spotted that two actions duplicated those of another audit. The committee report took one sentence to request.
What it saved them
- 3sites measured on the same base, instead of three questionnaires to reconcile
- 2duplicate actions caught before the spend
- 1committee report, with no manual rework
These figures are an example. They could be yours.
The standard imposes processes. Datamensio says where you stand.
01
The framework is already written
Themes, questions and levels L1 to L5, all written. You do not start from an empty spreadsheet.
02
The score lands the same day
Online, by self-assessment link or in interview. Theme by theme, comparable over time.
03
The gap becomes a costed plan
Every step up carries its action. The AI prioritises on expected effect, not on the order of the standard.
04
Progress can be demonstrated
Campaign after campaign, against your target and against your own past. That is what your board asks for.
The maturity scale
One level, the next, and the action that links the two.
It is this mechanism (a level, a level above, and the action linking the two) that turns an observation into a trajectory.
Are sustainability indicators calculated using a documented method that is reproducible from one building to another?
- N1
No written method. Values are produced ad hoc, based on data available at the time of the request.
- N2
A method exists for a few indicators, carried by one person or team. Calculation assumptions vary from site to site.
- N3
The method is documented for the whole core indicator set, with scope, functional unit and sources. It is applied across most of the portfolio.
- N4
Calculations are traced from the raw reading to the published value, checked before release, and gaps between sites are explained.
- N5
The method is reviewed periodically in line with evolving standards and operational feedback, with a version history and recalculation of series where needed.
Action to move from L2 to L3
Write a method sheet for each core indicator (scope, functional unit, data source, formula, owner), have it validated by the asset committee and make it a required part of the reporting file for the next annual exercise.
« With Datamensio, we meet our objectives far more efficiently. The ERDF inspection services and our supervising ministry particularly appreciated an approach that gives them reliable data. »
Director, CCI 94CCI Île-de-France
« We believe this is the most suitable solution to scale our transformation project and measure impact according to our needs. »
Maja SucekChief Operating Officer, Interreg Danube
Rarely on its own
Frameworks combine. Put several together to cover your business, or have the AI write yours.
Take your first measurementon ISO 21929.
What this framework covers
ISO 21929-1 does not prescribe a level of performance. It defines how to build valid sustainability indicators for a building: which aspects to cover, how to link each indicator to an impact on sustainable development issues, how to document the measurement method, the functional unit and the life cycle scope. It proposes a core set of indicators covering greenhouse gas emissions, non-renewable resource consumption, water, waste, indoor air quality, accessibility, adaptability, life cycle costs, safety and maintainability. It is a methodological framework, not a scoring grid.
This is what makes it demanding to manage. The data often exists, but scattered across the client, the operator, the design office and the maintenance team. Are the tracked indicators linked to an explicit sustainability aspect, or inherited from an old dashboard? Is the life cycle scope the same from one project to another, making comparisons possible? Can the values published in reports be reconstructed from a traceable source, or are they recalculated for each exercise?
The framework connects with the full ISO 21930 and ISO 21931 series, and with the European EN 15978 series on assessing the environmental performance of buildings. One confusion comes up often: ISO 21929-1 is sometimes mistaken for an environmental assessment method or a sustainable building label. It replaces neither RE2020, nor a labelling framework, nor a life cycle analysis. It provides the common grammar that makes these exercises consistent with each other and comparable over time.
The maturity assessment answers a different question from that of a compliance audit. The audit asks whether the requirement is met, yes or no. The assessment places each practice on a progressive scale and points to the action that moves it to the next level: formalising a collection method, extending an indicator across the whole portfolio, having calculation assumptions validated by a third party. The result is not a verdict, it is a costed trajectory that management can arbitrate.
In Datamensio, the framework is ready to use. You can also adapt it to your portfolio: the AI adjusts the themes, questions and levels according to the CMMI method, or builds a variant from your own documents, design charters, operating specifications or existing carbon assessments.
Reference standard: ISO 21929-1:2011, Sustainability in building construction, Sustainability indicators, Part 1: Framework for the development of indicators and a core set of indicators for buildings
The themes assessed
Framework and governance of indicators
Formalised sustainability policy, roles between client, operations and CSR, linking indicators to sustainable development issues, periodic review of the chosen set.
Scope and functional unit
Definition of the object being assessed, reference service life, life cycle stages covered, rules for splitting between building, plot and equipment, consistency across projects.
Environmental impacts and resources
Greenhouse gas emissions, primary energy and non-renewable resource consumption, water consumption, waste generation and recovery, land use.
Occupant health and comfort
Indoor air quality, thermal, acoustic and visual comfort, exposure to hazardous substances, measurement devices in operation.
Accessibility and use
Accessibility of the built environment, fit with user needs, usage feedback collected, stakeholder input into defining indicators.
Adaptability and service life
Capacity to reconfigure spaces, reversibility of uses, durability of components, end of life and reuse strategy.
Life cycle costs
Investment cost, operating and maintenance costs, end of life costs, discounting method, actual use in design decisions.
Safety, maintainability and resilience
Safety in use, maintainability of works, maintenance plans, consideration of climate hazards and natural risks.
Data, measurement and traceability
Data sources, instrumentation, collection frequency, documented calculation rules, quality control, ability to reconstruct a published value.
Reporting and continuous improvement
Reporting formats for governance bodies, comparison between sites and over time, integration of operational feedback, updating of the method.
A short version of the framework is available for the online self-assessment.
Frequently asked questions
Is ISO 21929-1 certifiable?
No. It is a methodological framework standard for developing sustainability indicators, with no associated certification body. The assessment measures the maturity of your practices and prepares the evaluation or labelling exercises you carry out elsewhere.
What is the difference between this assessment and a compliance audit?
The audit concludes with a gap or compliance against a requirement. The assessment places each practice on a maturity scale and points to the action that moves it to the next level. The result is a costed roadmap, not a binary verdict.
How does this framework connect with RE2020 and sustainable building labels?
ISO 21929-1 provides the grammar of the indicators, RE2020 sets regulatory thresholds and labels apply their own grids. A stable set of indicators keeps these exercises consistent with each other. A cross-cutting roadmap lets you combine several frameworks without duplicating actions.
How long does the assessment take?
The short version can be completed in one working session. The full version, run collaboratively with the client, operations and CSR teams, spans one to two weeks, most of the time being spent collecting data from sites.
Can it be applied to civil engineering works and not just buildings?
The core indicator set in Part 1 covers buildings. The principles for building indicators carry over to civil engineering works, by adjusting the scope and the reference service life. The AI generates this variant from your works documents.
Can the framework be adapted to our portfolio?
Yes. The questions, levels and themes can be changed, and you can add your own indicators. You own the framework, which allows it to evolve alongside your transformation programme.
Can sites be compared with each other?
Yes. Assessments run on the same framework can be compared by business unit, by site and over time. Gaps feed a consolidated roadmap that groups actions common to several entities.
Where is the data hosted?
In France, at OVH, with backup at Scaleway. No transfer outside the European Union. The AI models used can be selected, including from European providers.