Alteration Commercial
38 Sidney St, Cambridge, MA 02139
ClassificationBuilding: Alteration and AdditionCommercial Alteration
Reliable value$606,449
ContractorSiena Construction
Permit record
Parties
- Contractor
- Siena Construction
- Applicant
- Becca Patnode
- Owner
- Not in source
- Architect
- Cynthia Lynne Murphy
- 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
- 69-165
- 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
- B
- Building subtype
- Commercial / Mixed Use
Geocode & dates
- Coordinates
- 42.3616, -71.1009
- Geocode confidence
- 100%
- Geocode source
- Not in source
- Issued
- Aug 5, 2025
- Applied
- Jul 28, 2025
- Work class
- Commercial
Description
Source description
Full interior demolition on the 5th floor, excluding the core, to prepare for future fit-out.
Status
- Current status
- issued
- Source status
- Active
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
- Aug 5, 2025This permitAlteration Commercial · Issued$606,449Siena Construction
- Nov 6, 2024cambridge_aa_1140207Alteration Commercial · Issued$341,420The Richmond Group
- Dec 19, 2022cambridge_aa_196519Alteration Commercial · Issued$4,053,909.6The Richmond Group
- Oct 14, 2022cambridge_aa_197984Alteration Commercial · Issued$138,430Folan Waterproofing & Construction CO.
- Sep 26, 2019cambridge_aa_56305Alteration Commercial · Issued$1,427,624Wise Construction
- Jun 20, 2019cambridge_aa_49170Alteration Commercial · Issued$150,000Wise Construction
- Jan 30, 2019cambridge_aa_30068Alteration Commercial · Issued$125,450Siena Construction
- Dec 20, 2018cambridge_aa_29557Alteration Commercial · Issued$8,242Siena Construction
Full permit history at this parcel · as of Jul 8, 2026.
Other permits by Siena Construction
Developer details
- Permit #
- cambridge_aa_1176358
- Canonical ID
- 309:cambridge_aa_1176358
- Source permit ID
- cambridge_aa_1176358