Contractor Profile
Walsh Brothers
Walsh Brothers concentrates in commercial alteration in Boston (93% of its 15 segment-eligible permits), with secondary activity across 1 other segment. Its permit record in Boston spans 2019–2026. Reliable permit valuations total ≈$38.9M (across the 100% of filings with a valuation we can stand behind).
First permit: May 1, 2019 (2,702d ago)Latest permit: May 4, 2026 (142d ago)
The sales record
- Market
- Boston
- Active
- 2019–2026 · 7 yrs
- Licence IDs on their permits
- —
- Reliable value
- $38.9M
- Coverage
- 100%
- Reliable filings
- 15
- Rank in Boston
- #418
- Permits (all-time, all segments)
- 15
- Filings 90d
- 0
- Filings 30d
- 0
- Latest permit
- May 4, 2026
Typical project size$928Ktypically $107K–$2.5M across 15 valued permits
Where they work
Primarily Commercial Alteration — 93% of 15 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
Nov ’250–1 permits/moMay ’26
permits per month permit value
Service area
Typical service area ~2 mi around Somerville
The p90 footprint of where Walsh Brothers has pulled permits in Boston — drawn from all 15 of their indexed permits. It reflects detected permit activity, not a guaranteed service-area claim.
- Somerville15
Showing 15 of 15 permits by Walsh Brothers in the indexed window · most recent first
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- May 4, 2026Commercial Alteration399 Revolution Dr, Somerville Massachusetts 02145Alteration$3.1Mapplied Apr 8, 2026
- Mar 12, 2026Commercial Alteration399 Revolution Dr, Somerville Massachusetts 02145Alteration$1.1Mapplied Feb 10, 2026
- Nov 19, 2025Commercial Alteration399 Revolution Dr, Somerville Massachusetts 02145Alteration$400Kapplied Oct 16, 2025
- Aug 6, 2024Commercial Alteration399 Revolution Dr, Somerville Massachusetts 02145Alteration$1.5Mapplied Jun 17, 2024
- Aug 30, 2021Commercial Alteration236 Highland Ave, Somerville MassachusettsAlteration$50Kapplied Aug 12, 2021
- Jul 28, 2021Commercial Alteration236 Highland Ave, Somerville MassachusettsAlteration$18.4Mapplied Jun 14, 2021
- Jun 7, 2021Commercial Alteration325 Revolution Dr, Somerville MassachusettsAlteration$65Kapplied May 25, 2021
- Apr 13, 2021Commercial Alteration236 Highland Ave, Somerville MassachusettsAlteration$2.0Mapplied Mar 10, 2021
- Apr 12, 2021Commercial Alteration236 Highland Ave, Somerville Massachusetts 02143Alteration$400Kapplied Mar 22, 2021
- Mar 18, 2021Commercial Alteration236 Highland Ave, Somerville Massachusetts 02143Alteration$4.7Mapplied Feb 16, 2021
- Feb 11, 2021Commercial Alteration236 Highland Ave, Somerville Massachusetts 02143Alteration$150Kapplied Jan 19, 2021
- Sep 11, 2019Commercial Alteration399 Revolution Dr, Somerville MassachusettsAlteration$50Kapplied Aug 23, 2019
- May 1, 2019Residential Alteration39 Latin Way, Somerville Massachusetts 02155Alteration$6.0Mapplied Mar 11, 2019
- —Commercial Alteration236 Highland Ave, Somerville Massachusetts 02143Alteration$928Kapplied May 24, 2021
- —Commercial Alteration236 Highland Ave, Somerville MassachusettsAlteration$450applied Oct 25, 2022
May 4, 2026 applied Apr 8, 2026 | 399 Revolution Dr, Somerville Massachusetts 02145 | Commercial Alteration | $3.1M |
Mar 12, 2026 applied Feb 10, 2026 | 399 Revolution Dr, Somerville Massachusetts 02145 | Commercial Alteration | $1.1M |
Nov 19, 2025 applied Oct 16, 2025 | 399 Revolution Dr, Somerville Massachusetts 02145 | Commercial Alteration | $400K |
Aug 6, 2024 applied Jun 17, 2024 | 399 Revolution Dr, Somerville Massachusetts 02145 | Commercial Alteration | $1.5M |
Aug 30, 2021 applied Aug 12, 2021 | 236 Highland Ave, Somerville Massachusetts | Commercial Alteration | $50K |
Jul 28, 2021 applied Jun 14, 2021 | 236 Highland Ave, Somerville Massachusetts | Commercial Alteration | $18.4M |
Jun 7, 2021 applied May 25, 2021 | 325 Revolution Dr, Somerville Massachusetts | Commercial Alteration | $65K |
Apr 13, 2021 applied Mar 10, 2021 | 236 Highland Ave, Somerville Massachusetts | Commercial Alteration | $2.0M |
Apr 12, 2021 applied Mar 22, 2021 | 236 Highland Ave, Somerville Massachusetts 02143 | Commercial Alteration | $400K |
Mar 18, 2021 applied Feb 16, 2021 | 236 Highland Ave, Somerville Massachusetts 02143 | Commercial Alteration | $4.7M |
Feb 11, 2021 applied Jan 19, 2021 | 236 Highland Ave, Somerville Massachusetts 02143 | Commercial Alteration | $150K |
Sep 11, 2019 applied Aug 23, 2019 | 399 Revolution Dr, Somerville Massachusetts | Commercial Alteration | $50K |
May 1, 2019 applied Mar 11, 2019 | 39 Latin Way, Somerville Massachusetts 02155 | Residential Alteration | $6.0M |
— applied May 24, 2021 | 236 Highland Ave, Somerville Massachusetts 02143 | Commercial Alteration | $928K |
— applied Oct 25, 2022 | 236 Highland Ave, Somerville Massachusetts | Commercial Alteration | $450 |
Sites Walsh Brothers returns to2 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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