Privacy Policy

Effective: 1 January 2025 · Last updated: 7 October 2026

This is a reference translation. The Japanese version is the legally binding text; if the two differ, the Japanese version prevails.

Kazuya Maeda (the “Operator”) sets out below the Privacy Policy for handling the personal information of users collected through “CDE (Common Data Environment)” (the “Service”).

Article 1 (Information collected)

Type of information	What is collected
Account information	Email address and display name (obtained from Google when linking a Google account)
Usage data	Sign-in times, metadata of stored folders and files (name, update time, file size), sharing settings
Design data	IFC files, PDFs, images and similar that Users upload with the CDE (cloud save) feature (stored in Firebase Storage)
Payment information	Plan and subscription status obtained through Stripe when subscribing to a paid plan (card numbers and other payment details are never stored on the Operator’s servers)
Access logs	IP address, browser type, OS information (collected automatically by Firebase Analytics / Hosting)

Article 2 (Purpose of use)

The information collected is used for the following purposes.

Providing, operating and improving the Service (CDE, IFC viewer, IFC checks, quantity take-off, etc.)
User authentication and account management
Managing folder and file sharing (view and edit rights)
Responding to enquiries
Sending important notices about the Service
Detecting and preventing improper use
Statistical analysis of usage (in a form that does not identify individuals)

Article 3 (Handling of IFC files and other design data)

When processed in the browser: IFC schema checks, clash detection and quantity take-off process uploaded files only inside the browser (WebAssembly, IndexedDB). In this case files are not sent to or stored on the Operator’s servers.
When using the IFC 3D viewer (APS): IFC files are sent to the servers of Autodesk Platform Services (APS) to be converted into a 3D model for display. Files sent there are handled under Autodesk’s terms of service; see Autodesk’s privacy policy for details.
When using the CDE (cloud save) feature: IFC and other files are stored in Firebase Storage (Google’s servers). Access is restricted to the owner and to users permitted by the sharing settings.
Design data is never provided or sold to third parties.

Article 4 (Provision to third parties)

The Operator does not provide personal information to third parties except in the following cases.

With the User’s consent
Where required by law
Where necessary to protect a person’s life, body or property

Article 5 (Provision to subcontractors)

The Service uses the following external services and provides information to them to the extent necessary.

Service	Information provided / purpose
Google Firebase	Authentication data, usage data and files stored in the CDE (Firestore / Storage / Hosting / Analytics)
Stripe	Payment processing for the paid plan. Card details are held on Stripe’s servers and not retained by the Operator.

Please also review each company’s privacy policy.

Article 6 (Cookies and local storage)

The Service uses cookies and local storage provided by Firebase for session management and authentication. These are necessary to provide the Service and are not used for advertising. If cookies are disabled in your browser settings, the Service may not work correctly.

To understand how the Service is used and improve it, we also use Google Analytics (Firebase Analytics) cookies. They collect anonymous statistics such as pages viewed and device/browser environment, and do not identify individuals. They are not used for ad delivery. You can opt out with tools such as the Google Analytics opt-out browser add-on.

Article 7 (Storage and management of data)

Personal information is held on Google’s Firebase infrastructure (primarily servers in the United States).
Data that is no longer needed is deleted promptly.
Requests to delete an account are accepted by email. Personal information is erased within 30 days of deletion.

Article 8 (Use by minors)

The Service is a tool for architecture, construction and design work and is not intended for use by people under 18. If someone under 18 registers, they are deemed to have obtained the consent of a guardian.

Article 9 (Disclosure, correction and deletion)

Users may ask the Operator to disclose, correct, delete or suspend the use of their personal information. Please contact the email address below. After verifying identity, the Operator will respond within a reasonable period.

Article 10 (Changes to this Policy)

This Policy may be changed as necessary. Significant changes will be announced within the Service or by email.

Contact

Operator: Kazuya Maeda
Phone: 080-6358-4062
Email: info@buildcde.com