Permit Record

Residential

20 Montello St, Boston, MA 02122

ClassificationCertificate of Occupancy - CHGOCC
Reliable valueNot in source
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Tao Nguyen
Owner
Not in source
Architect
Not in source
Engineer
Not in source
Contractor license
Not in source
Building & lot · PLUTO
Building class
Not in source
Zoning district
Not in source
Lot area
Not in source
Year built
Not in source
Units (total)
Not in source
Units (residential)
Not in source
Units (commercial)
Not in source
Floor area
Not in source
Parcel & enrichment
Parcel APN
1501492000
Climate zone (IECC)
5A
Roof area (est.)
Not derivable — no building-size signal for this permit
HVAC tonnage (est.)
Not derivable — no building-size signal for this permit
Building type
Not in source
Building subtype
1-3FAM
Geocode & dates
Coordinates
42.3025, -71.0615
Geocode confidence
100%
Geocode source
Not in source
Issued
Dec 9, 2025
Applied
Not in source
Work class
Residential
Description
Source description

;3 Family Dwelling;Certificate For Same;Alt-1767920 Issued 10/09/2025

Status
Current status
finaled
Source status
Closed
Provenance
First seen by PermitCore
May 4, 2026 · 20:05 UTC
Last seen
Jun 24, 2026 · 23:05 UTC
Last changed
May 15, 2026 · 09:22 UTC
Data-quality checks1 of 12 flagged

1 of 12 data-quality checks flagged on this permit. Detail below.

Valuation is placeholder
valuation_usd_is_placeholder

valuation_usd matched a known placeholder (often 0 or 1) used by the source when the real valuation wasn't reported.

Checks not flagged

  • Geocode out of bounds
  • Geocode is sentinel
  • Issued date in the future
  • Issued date parse bug
  • Issued date is placeholder
  • Commercial units is placeholder
  • Residential units out of bounds
  • Residential units is placeholder
  • Total units out of bounds
  • Total units is placeholder
  • Valuation out of bounds
Project timeline at this parcel

4 permits at this parcel (parcel 1501492000) · Aug 2, 2010 – Dec 9, 2025

  1. Dec 9, 2025This permitOther · Finaled
  2. Oct 9, 2025ALT1767920Alteration Residential · Finaled
  3. Mar 16, 2012E125298MEP Electrical · Finaled$400
  4. Aug 2, 2010E36381MEP Electrical · Finaled$300

Full permit history at this parcel · as of Jul 8, 2026.

Developer details
Permit #
COO1789847
Canonical ID
69:COO1789847
Source permit ID
COO1789847
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