CALYPSO is a construction economics consultancy specialising in quantity takeoffs and the economic structuring of projects from the earliest design stages, throughout France.

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The construction economics consultancy

Our areas of expertise:

We support clients, architects, engineering consultancies, and contractors with services such as:

Client-side project support
Quantity Takeoffs and Bills of Quantities
Financial Estimates
Multi-Trade Cost Studies
Drafting of Bills of Quantities and Technical Specifications
Cost Analysis and Optimisation of Projects
BIM, Digital Model Utilisation and Data Extraction
Life Cycle Assessment (LCA)
Overall Cost

A calculator resting on some sheets of paper with a pen placed on top of it, used by a construction economist to calculate project costs.

Expertise dedicated to cost control

At CALYPSO, we believe that construction economics goes far beyond cost estimation. It means understanding a project as a whole, anticipating its technical challenges, assessing its economic impacts, and supporting the right decisions at the right time.
Our role is to turn project data into reliable, usable, and decision-oriented studies, whether during the feasibility, design, or tender phases.

Our approach is built around three pillars.

Accuracy

Each study is developed with rigour, method, and consistency to produce reliable deliverables that are ready for immediate use.

Overview

We bring together cost, technical, performance, environmental, and operational considerations to provide a comprehensive understanding of the project.

Support

We work in close collaboration with the design team and the client in order to secure decisions and streamline decision-making.