Primary sourcing
Government agencies, statutes, official program documentation, recorded records and recognized technical standards are preferred for claims about rules, maps and public data. Secondary sources may help explain a topic but should not replace the relevant authority.
No hidden certainty
Writers and tools must not convert an incomplete map, listing statement, nearby property result or national cost average into a parcel-specific conclusion. Limitations belong near the result, not only in a footer.
Commercial independence
Future advertising, referrals or paid reports must not change a tool result or source interpretation. Commercial relationships should be disclosed where they appear.
Corrections
Material errors should be corrected promptly. Pages should display a last-reviewed date and, where useful, a change note describing significant updates.
Professional review
Content touching title, land-use law, environmental jurisdiction, engineering, septic design, appraisal or financing should be reviewed or scoped with the relevant professional boundaries in mind.