Permit Record

Alteration Residential

16 Trowbridge St, Cambridge, MA 02138

ClassificationBuilding: Alteration and AdditionMultifamily Alteration
Reliable value$487,825
ContractorMainsail Managment
Permit record
Parties
Contractor
Mainsail Managment
Applicant
Tom Helms
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
23,128 sq ft
Parcel & enrichment
Parcel APN
134-39
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
42.3708, -71.1123
Geocode confidence
100%
Geocode source
Not in source
Issued
Aug 31, 2021
Applied
Jul 28, 2021
Work class
Residential
Description
Source description

Renovate 19 units (11, 13, 21, 31, 32, 41, 12, 22, 14, 24, 34, 44, 15, 25, 35, 45, 17, 27, 37, 47, & 46).  Removal of kitchen cabinets, flooring, bath tile. Install new Kitchen cabinets, Tile in bathrooms, floating floors, bath fixtures, appliances, new updated electrical devices. Basement work?

Status
Current status
issued
Source status
Active
Provenance
First seen by PermitCore
May 18, 2026 · 16:17 UTC
Last seen
Aug 6, 2026 · 11:30 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

3 permits at this parcel (parcel 134-39) · Jun 6, 2019 – Aug 31, 2021

  1. Aug 31, 2021This permitAlteration Residential · Issued$487,825Mainsail Managment
  2. Jun 27, 2019cambridge_aa_50105Alteration Residential · Issued$117,500Mystic River Contracting
  3. Jun 6, 2019cambridge_aa_48328Alteration Residential · Finaled$34,650Mystic River Contracting

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

Other permits by Mainsail Managment

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Developer details
Permit #
cambridge_aa_135616
Canonical ID
309:cambridge_aa_135616
Source permit ID
cambridge_aa_135616
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