Permit Record

Alteration Residential

18 Temple St, Boston, MA 02114

ClassificationLong Form/Alteration Permit - EXTRENResidential Alteration
Reliable value$55,300
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Michael Mawn
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
300022000
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
Not in source
Building subtype
1-2FAM
Geocode & dates
Coordinates
42.3608, -71.0635
Geocode confidence
100%
Geocode source
Not in source
Issued
Sep 26, 2025
Applied
Not in source
Work class
Residential
Description
Source description

Remove existing rear roof deck. Replace existing membrane roof. Replace existing wood deck in kind.

Status
Current status
issued
Source status
Open
Expired
Mar 26, 2026
Provenance
First seen by PermitCore
May 4, 2026 · 20:05 UTC
Last seen
Jun 24, 2026 · 23:03 UTC
Last changed
May 15, 2026 · 09:22 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

10 permits at this parcel (parcel 300022000) · Dec 20, 2010 – Sep 26, 2025

  1. Sep 26, 2025This permitAlteration Residential · Issued$55,300
  2. Aug 15, 2011E90771MEP Electrical · Issued$2,000
  3. Jul 20, 2011PL86328MEP Plumbing · Issued$8,000
  4. Jul 11, 2011PL85176MEP Plumbing · Finaled$12,000
  5. Jul 11, 2011E85391MEP Electrical · Issued$4,000
  6. Jul 11, 2011EFA85393MEP Electrical · Issued$400
  7. Jun 17, 2011E82145MEP Electrical · Finaled$3,000
  8. Jun 9, 2011ALT55823Alteration Residential · Issued$240,000
  9. May 11, 2011SF76360Alteration Residential · Issued$100,000
  10. Dec 20, 2010G56506MEP Plumbing · Issued$8,500

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

Developer details
Permit #
ALT1744125
Canonical ID
69:ALT1744125
Source permit ID
ALT1744125
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