{"@context":"https://schema.org","@type":"Dataset","@id":"https://zipradar.org/topic/deed-activity/02451/","name":"Deed activity for ZIP 02451 — Waltham, MA","description":"Deed activity data for ZIP 02451 (Waltham, Massachusetts), sourced from County recorders.","topic":{"slug":"deed-activity","label":"Deed activity","source":"County recorders","sourceUrl":"https://zipradar.org/methodology/","refreshCadence":"Daily at the county recorder","summary":"Not on zipradar yet. The plan is ZIP-level counts of deeds filed over the last 30, 90 and 365 days, never names or signatures. Until then, the county recorder's portal is the place to look.","limitations":"Top-50 metros covered at launch. Many smaller counties require subscription or paid access; zipradar links to the recorder portal without caching personal data."},"place":{"zip":"02451","city":"Waltham","state":"MA","stateFull":"Massachusetts","county":"Middlesex County","countySlug":"middlesex-county","geo":{"latitude":42.3765,"longitude":-71.2356}},"stateContext":{"topConcern":"Lead pipes, coastal flood, older housing","narrative":"Massachusetts has dense lead-service-line obligations under LCRR in Boston, Lowell, Worcester, Springfield. Coastal AE/VE zones along the South Shore + Cape. Older housing stock means lead-paint risk overlaps with LSL risk."},"radonZone":null,"airQuality":null,"waterQuality":null,"datePublished":"2026-04-24","dateModified":"2026-09-24","canonicalUrl":"https://zipradar.org/topic/deed-activity/02451/","zipDashboardUrl":"https://zipradar.org/zip/02451/","zipDashboardApiUrl":"https://zipradar.org/api/zip/02451","primarySourceUrl":"https://zipradar.org/methodology/","license":{"content":"CC-BY-4.0","attribution":"zipradar.org — https://zipradar.org/topic/deed-activity/02451/"}}