Permit Record

Alteration Residential

20 Belmont St, Boston, MA 02129

ClassificationLong Form/Alteration Permit - NROCCResidential Alteration
Reliable valueNot in source
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Jon Hagan
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
201529000
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
1-2FAM
Geocode & dates
Coordinates
42.3811, -71.0656
Geocode confidence
100%
Geocode source
Not in source
Issued
Jul 11, 2023
Applied
Not in source
Work class
Residential
Description
Source description

Confirming occupancy of existing 1 family home.;

Status
Current status
finaled
Source status
Closed
Expired
Jan 11, 2024
Provenance
First seen by PermitCore
May 4, 2026 · 20:05 UTC
Last seen
Jun 24, 2026 · 23:02 UTC
Last changed
May 15, 2026 · 09:21 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

5 permits at this parcel (parcel 201529000) · Feb 18, 2022 – Jul 11, 2023

  1. Jul 11, 2023This permitAlteration Residential · Finaled
  2. Apr 4, 2023SF1456303Alteration Residential · Finaled$1,500
  3. Aug 18, 2022PL1377886MEP Plumbing · Issued$4,500
  4. Apr 11, 2022E1316786MEP Electrical · Finaled$2,360
  5. Feb 18, 2022SF1298239Alteration Residential · Issued$5,000

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

Developer details
Permit #
ALT1456314
Canonical ID
69:ALT1456314
Source permit ID
ALT1456314
Browse Boston permits in the Market Explorer →Pull this permit via /v1/permits →