Co-ownership services
Co-ownership DTG
A complete view of your building's condition in a single study. The DTG assesses the overall condition (structure, energy, regulatory compliance) and helps anticipate the works needed over the next 10 years.
What is the DTG?
Created by the ALUR Act of 24 March 2014, the Global Technical Diagnosis (DTG) is a comprehensive assessment that goes beyond a simple energy diagnosis. It analyses the structural soundness, the condition of common areas, collective equipment, energy performance, and estimates works costs over the next 10 years.
In which cases is the DTG mandatory?
Conversion to co-ownership
Conversion to co-ownership of buildings more than 10 years old.
Unfitness procedure
When an unfitness (insalubrité) procedure is initiated against the building.
Vote at the general meeting
By decision of the general meeting, voted by article 24 majority.
What does the DTG contain?
- Analysis of the condition of common areas and equipment
- Legal and regulatory compliance status
- Analysis of possible improvements to technical management
- Energy performance diagnosis of the building
- Assessment of works costs over 10 years
DTG, collective EPC or audit: how to choose?
| Criterion | DTG | Collective EPC | Co-ownership audit |
|---|---|---|---|
| Scope | Global (structure + energy) | Energy only | In-depth energy |
| Depth | Very comprehensive | Standard | In-depth |
| Works scenarios | Yes (all types) | Recommendations | Yes (energy) |
| Includes the EPC | Yes | It is the EPC | No |
| Indicative price | 5,000 to 20,000 € | 1,500 to 6,000 € | 3,000 to 15,000 € |
How does the DTG unfold at RITMODiag?
Preparatory phase
Collection and analysis of documents: rules, plans, maintenance logs, previous diagnostics.
Full inspection
In-depth visit of common areas and a sample of dwellings, with technical measurements.
Analysis and modelling
Assessment of each component, production of the collective EPC and regulatory analysis.
Report and delivery
Delivery of a full report with prioritised recommendations, budget estimates and a presentation.
Why choose RITMODiag for your DTG?
RGE-certified engineering firm
OPQIBI 1905 and 1911 qualifications, a guarantee of competence and regulatory compliance.
Controlled turnaround
Full report delivered in time for your next general meeting.
Local presence and coverage
A local presence wherever RITMODiag operates, with controlled turnaround times.
Bundled offers
Full support with bundled DTG + PPPT offers to optimise cost and consistency.
Frequently asked questions
Is the DTG mandatory for all co-ownerships?
No, only for buildings more than 10 years old on first conversion to co-ownership, or in the context of unfitness procedures. It can also be decided by a vote at the general meeting.
Does the DTG replace the collective EPC?
Yes, it includes an energy component equivalent to the collective EPC and can therefore replace it, in particular within the PPPT framework.
How long is the DTG valid?
The validity period is not legally defined. An update is recommended every 10 years, or after major works.
Can you combine the DTG and the PPPT?
Yes, it is recommended and available as a combined assignment. The DTG then serves as the technical basis for the multi-year works plan.
Need a quote for your DTG?
Our RGE-certified experts study your building and offer tailor-made support.