Permit Record

Alteration Residential

509 Franklin St, Unit 2, Cambridge, MA 02139

ClassificationBuilding: Alteration and AdditionMultifamily Alteration
Reliable value$4,480
ContractorHs General Contracting
Permit record
Parties
Contractor
Hs General Contracting
Applicant
Humberto Da Silva
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
1,245 sq ft
Parcel & enrichment
Parcel APN
120-37
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
R
Building subtype
Multi Family (3 or more dwelling units)
Geocode & dates
Coordinates
42.3678, -71.1109
Geocode confidence
100%
Geocode source
Not in source
Issued
May 22, 2025
Applied
May 6, 2025
Work class
Residential
Description
Source description

Installation of two new windows in living room area

Status
Current status
finaled
Source status
Complete
Finaled
May 22, 2025
Provenance
First seen by PermitCore
May 18, 2026 · 16:17 UTC
Last seen
Aug 6, 2026 · 11:31 UTC
Last changed
May 18, 2026 · 16:17 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

2 permits at this parcel (parcel 120-37) · Jan 2, 2025 – May 22, 2025

  1. May 22, 2025This permitAlteration Residential · Finaled$4,480Hs General Contracting
  2. Jan 2, 2025cambridge_aa_1143562Alteration Residential · Finaled$5,000Homeworks Energy

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

Other permits by Hs General Contracting

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Developer details
Permit #
cambridge_aa_1163804
Canonical ID
309:cambridge_aa_1163804
Source permit ID
cambridge_aa_1163804
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