21 Brennan Ave
Waltham, MA 02451
residentialSingle Family
Building & Site Intelligence
Complete building characteristics, construction details, and site data from municipal assessor records and supplementary sources.
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Property Intelligence: 21 Brennan Ave, Waltham, MA 02451
Property Overview
21 Brennan Ave is a Colonial, Single Family, built in 1850, 1,660 square feet, 0.54 acres in MIDDLESEX County, MA. 2 bedrooms, 1 bathrooms. Ownership type: Individual. Assessed value: $873,500.
Condition & Permits
No building permits on file.
Risk & Hazard Profile
NEP Fire Protection Grade: C. FEMA flood zone: X. Risk assessment combines NEP proprietary ratings with federal, state, and municipal hazard data at parcel-level precision.
Ownership & Deed History
Last sale: July 2019 for $700,000. Full ownership chain, entity resolution, lien analysis, and comparable sales available with subscription.
About This Data
NE Provenance assembles property intelligence from municipal assessor records, building permit databases, county deed registries, federal environmental and hazard datasets, business registration filings, and state-level geospatial data — 140+ authoritative, primary sources corroborated at the individual address level.
Property data for Waltham, MA and all six New England states. NE Provenance covers MIDDLESEX County and over 4.7 million properties across 29 counties with up to 430 intelligence attributes per property record.
