Contractor Profile
James J. Welch & CO.
James J. Welch & CO. concentrates in commercial alteration in Boston (96% of its 23 segment-eligible permits), with secondary activity across 1 other segment. Its permit record in Boston spans 2019–2026. Reliable permit valuations total ≈$15.3M (across the 100% of filings with a valuation we can stand behind). Filing activity is down 80% over the last 90 days versus the prior 90.
First permit: Mar 19, 2019 (2,722d ago)Latest permit: Jun 24, 2026 (68d ago)
The sales record
- Market
- Boston
- Active
- 2019–2026 · 7 yrs
- Licence IDs on their permits
- —
- Reliable value
- $15.3M
- Coverage
- 100%
- Reliable filings
- 23
- Rank in Boston
- #244
- Permits (all-time, all segments)
- 23
- Filings 90d
- 1
- Filings 30d
- 0
- Latest permit
- Jun 24, 2026
Typical project size$510Ktypically $190K–$867K across 23 valued permits
Where they work
Primarily Commercial Alteration — 96% of 23 segment-classified permits
Firmographics
License & registration IDs on fileNot in our data — we don’t hold licensing-board registries, and this city’s permit records carry no licence number. This is a gap in our coverage, not a statement about this firm’s licensure.
Direct contactNot in our data — we don’t fabricate firmographics.
Monthly activity
Aug ’240–3 permits/moJun ’26
permits per month permit value
Service area
Typical service area ~1 mi around Cambridge
The p90 footprint of where James J. Welch & CO. has pulled permits in Boston — drawn from all 23 of their indexed permits. It reflects detected permit activity, not a guaranteed service-area claim.
- Cambridge23
Recent permitsLargest recent$3.2M· 5 Craigie Cir, Cambridge, MA 02138
Showing 20 of 23 permits by James J. Welch & CO. in the indexed window · most recent first
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- Jun 24, 2026Multifamily New Construction5 Craigie Cir, Cambridge, MA 02138New Construction Residential Mf$3.2Mapplied Oct 31, 2025
- May 29, 2026Commercial Alteration95 Mt Auburn St, Cambridge, MA 02138Alteration$1.1Mapplied Apr 14, 2026
- May 28, 2026Commercial Alteration1033 Massachusetts Ave, Cambridge, MA 02138Alteration$646Kapplied May 4, 2026
- May 4, 2026Commercial Alteration95 Mt Auburn St, Cambridge, MA 02138Alteration$84Kapplied Apr 23, 2026
- Mar 24, 2026Commercial Alteration50 Church St, Cambridge, MA 02138Alteration$580Kapplied Dec 31, 2025
- Mar 12, 2026Commercial Alteration23 Prospect St, Cambridge, MA 02139Alteration$96Kapplied Feb 2, 2026
- Nov 4, 2025Commercial Alteration36 Jfk St, Cambridge, MA 02138Alteration$200Kapplied Sep 16, 2025
- Feb 14, 2025Commercial Alteration13 Brattle St, Cambridge, MA 02138Alteration$1.0Mapplied Jan 23, 2025
- Nov 18, 2024Commercial Alteration222 Jacobs St, Cambridge, MA 02141Alteration$574Kapplied Oct 17, 2024
- Aug 7, 2024Commercial Alteration464 Massachusetts Ave, Cambridge, MA 02139Alteration$1.0Mapplied Jun 18, 2024
- Apr 12, 2024Commercial Alteration464 Massachusetts Ave, Cambridge, MA 02139Alteration$12Kapplied Apr 5, 2024
- Jan 22, 2024Commercial Alteration151 North First St, Cambridge, MA 02141Alteration$1.2Mapplied Nov 28, 2023
- May 8, 2023Commercial Alteration165 Main St, Cambridge, MA 02142Alteration$510Kapplied Jan 31, 2023
- Jan 25, 2023Commercial Alteration25 Columbia St, Cambridge, MA 02139Alteration$734Kapplied Nov 7, 2022
- Nov 21, 2022Commercial Alteration660 Cambridge St, Cambridge, MA 02141Alteration$305Kapplied Sep 15, 2022
- Jul 8, 2022Commercial Alteration32 Church St, Cambridge, MA 02138Alteration$2.1Mapplied May 3, 2022
- Feb 18, 2022Commercial Alteration415 Massachusetts Ave, Cambridge, MA 02139Alteration$300Kapplied Jun 15, 2021
- Dec 21, 2021Commercial Alteration415 Massachusetts Ave, Cambridge, MA 02139Alteration$300Kapplied Jun 15, 2021
- Jun 24, 2021Commercial Alteration640 Massachusetts Ave, Cambridge, MA 02139Alteration$180Kapplied May 14, 2021
- Oct 1, 2020Commercial Alteration300 Massachusetts Ave, Cambridge, MA 02139Alteration$20Kapplied Aug 21, 2020
Jun 24, 2026 applied Oct 31, 2025 | 5 Craigie Cir, Cambridge, MA 02138 | Multifamily New Construction | $3.2M |
May 29, 2026 applied Apr 14, 2026 | 95 Mt Auburn St, Cambridge, MA 02138 | Commercial Alteration | $1.1M |
May 28, 2026 applied May 4, 2026 | 1033 Massachusetts Ave, Cambridge, MA 02138 | Commercial Alteration | $646K |
May 4, 2026 applied Apr 23, 2026 | 95 Mt Auburn St, Cambridge, MA 02138 | Commercial Alteration | $84K |
Mar 24, 2026 applied Dec 31, 2025 | 50 Church St, Cambridge, MA 02138 | Commercial Alteration | $580K |
Mar 12, 2026 applied Feb 2, 2026 | 23 Prospect St, Cambridge, MA 02139 | Commercial Alteration | $96K |
Nov 4, 2025 applied Sep 16, 2025 | 36 Jfk St, Cambridge, MA 02138 | Commercial Alteration | $200K |
Feb 14, 2025 applied Jan 23, 2025 | 13 Brattle St, Cambridge, MA 02138 | Commercial Alteration | $1.0M |
Nov 18, 2024 applied Oct 17, 2024 | 222 Jacobs St, Cambridge, MA 02141 | Commercial Alteration | $574K |
Aug 7, 2024 applied Jun 18, 2024 | 464 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $1.0M |
Apr 12, 2024 applied Apr 5, 2024 | 464 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $12K |
Jan 22, 2024 applied Nov 28, 2023 | 151 North First St, Cambridge, MA 02141 | Commercial Alteration | $1.2M |
May 8, 2023 applied Jan 31, 2023 | 165 Main St, Cambridge, MA 02142 | Commercial Alteration | $510K |
Jan 25, 2023 applied Nov 7, 2022 | 25 Columbia St, Cambridge, MA 02139 | Commercial Alteration | $734K |
Nov 21, 2022 applied Sep 15, 2022 | 660 Cambridge St, Cambridge, MA 02141 | Commercial Alteration | $305K |
Jul 8, 2022 applied May 3, 2022 | 32 Church St, Cambridge, MA 02138 | Commercial Alteration | $2.1M |
Feb 18, 2022 applied Jun 15, 2021 | 415 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $300K |
Dec 21, 2021 applied Jun 15, 2021 | 415 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $300K |
Jun 24, 2021 applied May 14, 2021 | 640 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $180K |
Oct 1, 2020 applied Aug 21, 2020 | 300 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $20K |
Other top Commercial Alteration contractors in Boston
- Wise Construction192 commercial alteration
- Siena Construction Corporation166 commercial alteration
- The Richmond Group84 commercial alteration
- Pidc Construction69 commercial alteration
- Gloucester Builders68 commercial alteration
- Berkeley Building Company67 commercial alteration
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