Permit Record

Alteration Residential

12 Hilliard St, Cambridge, MA 02138

ClassificationBuilding: Alteration and AdditionResidential Alteration
Reliable value$8,550
ContractorClean Tech Construction →
Permit record
Parties
Contractor
Clean Tech Construction
Applicant
Arianna Davidson
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
168-50
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
One or Two Family Dwelling
Geocode & dates
Coordinates
42.3742, -71.1234
Geocode confidence
100%
Geocode source
Not in source
Issued
May 13, 2024
Applied
May 10, 2024
Work class
Residential
Description
Source description

Residential weatherization and air sealing with the Mass Save Program. No structural changes.

Status
Current status
finaled
Source status
Complete
Finaled
May 13, 2024
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 168-50) · Sep 26, 2022 – May 13, 2024

  1. May 13, 2024This permitAlteration Residential · Finaled$8,550.58Clean Tech Construction
  2. Sep 26, 2022cambridge_aa_188910Alteration Residential · Finaled$90,075Western Construction

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

Other permits by Clean Tech Construction

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Developer details
Permit #
cambridge_aa_270219
Canonical ID
309:cambridge_aa_270219
Source permit ID
cambridge_aa_270219
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