C-Change Labs

Construction Industry

  • Duration: 1.5 years
  • Team size: 6-8 people
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C-Change Labs needed to build a cloud SaaS tool for the North American construction industry to help them evaluate and reduce greenhouse gases (GHGs) emitted in the manufacture of building materials, without loss of performance or excessive cost.

The product digitizes available sustainability information about materials, arranges them in a database, and provides tools to search for construction materials with the lowest available carbon dioxide emissions from the manufacturing process and transportation to the building site. The site includes tools for architects, structural engineers, contractors, and manufacturers.


Information about materials is provided in Environmental Product Declarations (EPDs), typically in non-standardized PDFs. With thousands of products and poor standardization of data, it is hard to make practical use of these to make business decisions.

The challenge was to digitize these machine-unfriendly EPDs, store them in a database alongside product performance and location data, and offer industry-specific searches to make them usable. With a relatively nontechnical audience, it was important to offer rich visualizations, ease of use, and plenty of flexibility.
It was necessary that the backend provide a secure sharing environment for potentially sensitive building quantity data, while still making the tool as a whole open source.

A heavy frontend was another challenge. Some pages are Excel-like with their own calculations, conditional formatting, hierarchy, and dynamic tree structures, which load the browser heavily.


The solution combines external services (DocParser, Box.com) with internal logic via webhooks. An automated QA process finds errors in the imported documents, which can be corrected by improved scripts or by data entry staff.

The data is stored in a Neo4J database, a flexible graph-oriented database managed through a flexible Data Object Model. Hierarchical data models exploit the noSQL properties of Neo4J to allow the tool to handle an ever-growing list of material types with their own industry-specific properties. The graph features are leveraged to ensure privacy, and enable collaboration among manufacturers, sustainability program operators, and architecture/engineering professionals.

A user-friendly frontend features flexible units, rich D3.js visualizations, and extensive in-tool documentation.

The whole solution is scalable, containerized, and deployed on Azure.


  • Back-end: Python, Django, RabbitMQ
  • Front-end: Angular
  • Databases: Neo4j


While still in early stages, the web app has received positive feedback from key stakeholders. Logicify corrected bugs quickly and responds equally as promptly to other concerns. Their team not only provides high-quality deliverables, but also demonstrates a vested interest in long-term outcomes.

Phil Northcott