Property effects vary by market and by proximity, visibility, construction disruption, noise conditions, infrastructure, and public perception. A universal percentage claim is not reliable.
For a local answer, compare similar sales, document exact distances, and distinguish a planned project from an operating facility.
What to verify locally: This guide helps homeowners and buyers evaluate evidence without overclaiming.
Local value research
Use original public records whenever possible. A developer statement can explain an intent; an approval, permit, or utility filing is where enforceable details are more likely to appear.
Questions for a buyer
Record the date, document title, agency, page number, and project address. That turns a claim into something another reader can check.
Evidence standard: this guide avoids treating a proposal as a completed project, and avoids treating a missing record as proof that no impact exists.