Permit Record

Alteration Residential

71 Larch Rd, Cambridge, MA 02138

ClassificationBuilding: Alteration and AdditionResidential Alteration
Reliable value$7,747
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Geoffrey Baylies
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
247-225
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
42.3779, -71.1421
Geocode confidence
100%
Geocode source
Not in source
Issued
May 11, 2026
Applied
May 11, 2026
Work class
Residential
Description
Source description

Mass Save Insulation, insulation to exterior walls and in knee walls

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

4 permits at this parcel (parcel 247-225) · Nov 26, 2024 – May 11, 2026

  1. May 11, 2026This permitAlteration Residential · Issued$7,747.75N/a
  2. May 11, 2026cambridge_aa_1210654Alteration Residential · Finaled$15,800Pella Of Boston
  3. Jul 16, 2025cambridge_aa_1172278Alteration Residential · Issued$124,960Braz Remodeling Usa
  4. Nov 26, 2024cambridge_aa_1138426Alteration Residential · Finaled$341,900Braz Remodeling Usa

Full permit history at this parcel · as of Jul 11, 2026.

Developer details
Permit #
cambridge_aa_1210993
Canonical ID
309:cambridge_aa_1210993
Source permit ID
cambridge_aa_1210993
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