Addenda
Energy and environmental consulting for building projects, covering HQE, thermal simulation and energy optimisation for clients in France
Highlights
- New on EvolcAdded 2026-11-02
About Addenda
ADDENDA provides building-performance consulting: environmental quality (HQE) assistance to project owners, energy and environmental optimisation of buildings, and thermal dynamic simulation. Its services span territorial analysis, programming, design and construction support, and monitoring of energy consumption during building operation.
Its customers are project owners and building designers for public and private construction projects, including schools, colleges, lycées, office buildings and urban development schemes.
The company was founded in 1999 and is headquartered in Auch (Gers), France; it moved there from Toulouse in 2006. It reports more than 500 sustainable building projects and over 4 million m² simulated. Its team includes architects, urban planners and engineers working with BIM. In January 2024 the company was taken over by its employees.
Product: Environmental quality (HQE) project assistance, thermal simulation and energy optimisation consulting for buildings and urban development.
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Website technologies
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Website detection does not establish a paid subscription or company-wide use. Tools loaded after consent or sign-in may be missed. “No longer observed” does not prove the company stopped using a tool.