Permit Record

Alteration Residential

21 Thurston St, Boston, MA 02128

ClassificationLong Form/Alteration Permit - ADDITIONResidential Alteration
Reliable value$76,000
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Valentin General Contracting
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
104396000
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
42.3847, -71.0060
Geocode confidence
100%
Geocode source
Not in source
Issued
Nov 30, 2017
Applied
Not in source
Work class
Residential
Description
Source description

Add a second story addition to existing building (one family #880/1958);( for proposal of one bathroom and two bedroom) Efrain- 6174072584

Status
Current status
issued
Source status
Open
Expired
May 30, 2018
Provenance
First seen by PermitCore
May 4, 2026 · 20:05 UTC
Last seen
Jun 24, 2026 · 23:04 UTC
Last changed
May 15, 2026 · 09:22 UTC
Data-quality checks0 of 12 flagged

0 of 12 data-quality rules flagged anything on this permit.

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
  • Valuation is placeholder
Project timeline at this parcel

6 permits at this parcel (parcel 104396000) · Nov 30, 2017 – Jul 22, 2026

  1. Jul 22, 2026E1874549MEP Electrical · Issued$1,000
  2. Mar 5, 2019E928311MEP Electrical · Finaled$12,000
  3. Feb 12, 2019PL922649MEP Plumbing · Issued$6,500
  4. Feb 12, 2019G922650MEP Plumbing · Issued$1,500
  5. Sep 13, 2018E877793MEP Electrical · Issued$2,500
  6. Nov 30, 2017This permitAlteration Residential · Issued$76,000

Full permit history at this parcel · as of Jul 25, 2026.

Developer details
Permit #
ALT771290
Canonical ID
69:ALT771290
Source permit ID
ALT771290
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