Terms of Use & Privacy

What this platform does with your information, and what you should and should not rely on it for.

Last updated July 6, 2026

What Arch Datum is

Arch Datum is a set of decision-support tools for design and construction professionals: site and code analysis, development pro formas, energy and resilience ROI estimates, certification comparisons, and contract guidance. It is published by Jeff Seabold, FAIA. The platform is in active development and its outputs are estimates built from published data sources, which are cited throughout the tools.

What the outputs are, and are not

Every number this platform produces is an estimate for early-stage decision support. Outputs are not construction cost guarantees, not code compliance determinations, not insurance quotes, not tax advice, and not legal advice. Code analysis must be verified with the authority having jurisdiction. Financial projections must be verified with your lender, accountant, and tax professional. Contract guidance is general information, not a substitute for an attorney.

You are responsible for verifying any output before relying on it professionally. Use of this platform does not create an architect-client, contractor-client, or advisory relationship of any kind.

What we collect and why

Project data you enter stays in your browser's local storage on your device. If you create an account, project records you save are stored in our database so you can reach them from other devices. They are keyed to your account and are not visible to other users.
Email addresses you provide through save panels or the access form are used to send you the link you requested and to let us contact you about the platform. Save requests are logged with a timestamp, the tool used, and the project name so the link can be regenerated if it fails to arrive.
We do not sell or share your email or project data with third parties. We do not run advertising or third-party analytics trackers.

Account data

Accounts use passwordless email sign-in. We store your email address and the project records you choose to save. You can request deletion of your account and its data at any time by emailing the address below, and we will remove it.

Intellectual property

The platform's code, text, calculators, and data compilations are copyright Jeff Seabold, FAIA. Building code values referenced in the tools are derived from codes as adopted by public jurisdictions; certification program names and standards belong to their respective organizations (USGBC, IBHS, Phius, AIA, and others) and are referenced for identification. You may use tool outputs in your own professional work. You may not scrape, republish, or resell the platform's data compilations or code.

No warranty

The platform is provided as-is, without warranty of any kind, express or implied. To the fullest extent permitted by law, we are not liable for decisions made or losses incurred in reliance on platform outputs. Data sources are cited so you can check the numbers yourself. Do that. It is what the platform is for.

Changes

These terms will change as the platform grows, and the date at the top of this page will change with them. Material changes to how we handle your data will be noted on this page before they take effect.

Contact

Questions about these terms or your data: info@jeffseaboldfaia.org