Contractor Profile
Walsh Brothers
Walsh Brothers concentrates in commercial alteration in Boston (88% of its 43 segment-eligible permits), with secondary activity across 2 other segments. Its permit record in Boston spans 2019–2026. Reliable permit valuations total ≈$117M (across the 100% of filings with a valuation we can stand behind).
First permit: Feb 26, 2019 (2,762d ago)Latest permit: Jul 16, 2026 (65d ago)
The sales record
- Market
- Boston
- Active
- 2019–2026 · 7 yrs
- Licence IDs on their permits
- —
- Reliable value
- $117M
- Coverage
- 100%
- Reliable filings
- 43
- Rank in Boston
- #114
- Permits (all-time, all segments)
- 43
- Filings 90d
- 1
- Filings 30d
- 0
- Latest permit
- Jul 16, 2026
Typical project size$1.9Mtypically $936K–$2.8M across 43 valued permits
Where they work
Primarily Commercial Alteration — 88% of 43 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
Sep ’240–2 permits/moJul ’26
permits per month permit value
Service area
Typical service area ~2 mi around Cambridge
The p90 footprint of where Walsh Brothers has pulled permits in Boston — drawn from all 43 of their indexed permits. It reflects detected permit activity, not a guaranteed service-area claim.
- Cambridge43
Recent permitsLargest recent$25.4M· 1 Oxford St, Cambridge, MA 02138
Showing 20 of 43 permits by Walsh Brothers in the indexed window · most recent first
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- Jul 16, 2026Commercial Alteration182 Memorial Dr, Cambridge, MA 02142Alteration$1.5Mapplied May 26, 2026
- Feb 2, 2026Commercial Alteration1493 Cambridge St, Cambridge, MA 02139Alteration$1.4Mapplied Jan 12, 2026
- Dec 10, 2025Commercial Alteration105 Massachusetts Ave, Cambridge, MA 02142Alteration$2.4Mapplied Aug 25, 2025
- Dec 9, 2025Commercial Alteration6 Appian Way, Cambridge, MA 02138Alteration$822Kapplied Nov 21, 2025
- Nov 13, 2025Commercial Alteration26 Dewolfe St, Cambridge, MA 02138Alteration$2.5Mapplied Oct 28, 2025
- Jul 24, 2025Commercial Alteration330 Mt Auburn St, Cambridge, MA 02138Alteration$465Kapplied Jul 11, 2025
- Jul 3, 2025Commercial Alteration105 Massachusetts Ave, Cambridge, MA 02142Alteration$300Kapplied Jun 9, 2025
- Mar 12, 2025Commercial Alteration250 Massachusetts Ave, Cambridge, MA 02139Alteration$3.1Mapplied Jan 15, 2025
- Dec 17, 2024Commercial Alteration330 Mt Auburn St, Cambridge, MA 02138Alteration$3.1Mapplied Nov 14, 2024
- Nov 8, 2024Commercial Alteration40 Dewolfe St, Unit F, Cambridge, MA 02138Alteration$2.5Mapplied Sep 30, 2024
- Sep 3, 2024Commercial Alteration250 Massachusetts Ave, Cambridge, MA 02139Alteration$4.6Mapplied Jul 24, 2024
- Apr 1, 2024Commercial Alteration1 Oxford St, Cambridge, MA 02138Alteration$2.7Mapplied Feb 20, 2024
- Jan 29, 2024Multifamily Alteration100 Memorial Dr, Cambridge, MA 02142Alteration$1.9Mapplied Jan 8, 2024
- Oct 26, 2023Commercial Alteration330 Mt Auburn St, Cambridge, MA 02138Alteration$650Kapplied Mar 1, 2023
- Oct 24, 2023Commercial Alteration181 Massachusetts Ave, Cambridge, MA 02139Alteration$97Kapplied Oct 6, 2023
- Oct 17, 2023Commercial Alteration1 Oxford St, Cambridge, MA 02138Alteration$58Kapplied Sep 21, 2023
- Oct 6, 2023Commercial Alteration330 Mt Auburn St, Cambridge, MA 02138Alteration$4.1Mapplied Aug 17, 2023
- Oct 3, 2023Commercial Alteration1 Oxford St, Cambridge, MA 02138Alteration$25.4Mapplied Jun 21, 2023
- Aug 17, 2023Commercial Alteration250 Massachusetts Ave, Cambridge, MA 02139Alteration$2.2Mapplied Jun 30, 2023
- May 24, 2023Commercial Demolition330 Mt Auburn St, Cambridge, MA 02138Demolition · Commercial$2.8Mapplied Mar 21, 2023
Jul 16, 2026 applied May 26, 2026 | 182 Memorial Dr, Cambridge, MA 02142 | Commercial Alteration | $1.5M |
Feb 2, 2026 applied Jan 12, 2026 | 1493 Cambridge St, Cambridge, MA 02139 | Commercial Alteration | $1.4M |
Dec 10, 2025 applied Aug 25, 2025 | 105 Massachusetts Ave, Cambridge, MA 02142 | Commercial Alteration | $2.4M |
Dec 9, 2025 applied Nov 21, 2025 | 6 Appian Way, Cambridge, MA 02138 | Commercial Alteration | $822K |
Nov 13, 2025 applied Oct 28, 2025 | 26 Dewolfe St, Cambridge, MA 02138 | Commercial Alteration | $2.5M |
Jul 24, 2025 applied Jul 11, 2025 | 330 Mt Auburn St, Cambridge, MA 02138 | Commercial Alteration | $465K |
Jul 3, 2025 applied Jun 9, 2025 | 105 Massachusetts Ave, Cambridge, MA 02142 | Commercial Alteration | $300K |
Mar 12, 2025 applied Jan 15, 2025 | 250 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $3.1M |
Dec 17, 2024 applied Nov 14, 2024 | 330 Mt Auburn St, Cambridge, MA 02138 | Commercial Alteration | $3.1M |
Nov 8, 2024 applied Sep 30, 2024 | 40 Dewolfe St, Unit F, Cambridge, MA 02138 | Commercial Alteration | $2.5M |
Sep 3, 2024 applied Jul 24, 2024 | 250 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $4.6M |
Apr 1, 2024 applied Feb 20, 2024 | 1 Oxford St, Cambridge, MA 02138 | Commercial Alteration | $2.7M |
Jan 29, 2024 applied Jan 8, 2024 | 100 Memorial Dr, Cambridge, MA 02142 | Multifamily Alteration | $1.9M |
Oct 26, 2023 applied Mar 1, 2023 | 330 Mt Auburn St, Cambridge, MA 02138 | Commercial Alteration | $650K |
Oct 24, 2023 applied Oct 6, 2023 | 181 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $97K |
Oct 17, 2023 applied Sep 21, 2023 | 1 Oxford St, Cambridge, MA 02138 | Commercial Alteration | $58K |
Oct 6, 2023 applied Aug 17, 2023 | 330 Mt Auburn St, Cambridge, MA 02138 | Commercial Alteration | $4.1M |
Oct 3, 2023 applied Jun 21, 2023 | 1 Oxford St, Cambridge, MA 02138 | Commercial Alteration | $25.4M |
Aug 17, 2023 applied Jun 30, 2023 | 250 Massachusetts Ave, Cambridge, MA 02139 | Commercial Alteration | $2.2M |
May 24, 2023 applied Mar 21, 2023 | 330 Mt Auburn St, Cambridge, MA 02138 | Commercial Demolition Commercial | $2.8M |
Sites Walsh Brothers returns to5 in Boston
Addresses where Walsh Brothers has pulled repeat permits and the site itself has a deep permit history (25+ permits, all contractors). Each links to that parcel’s full record.
Other top Commercial Alteration contractors in Boston
- Wise Construction196 commercial alteration
- Siena Construction Corporation166 commercial alteration
- The Richmond Group84 commercial alteration
- Pidc Construction69 commercial alteration
- Gloucester Builders68 commercial alteration
- Berkeley Building Company68 commercial alteration
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