Commercial & Residential Services
  • Excavation
  • Site and Utility
  • Sewer Connections
  • Water Services
  • Septic Services
  • Retaining Walls
  • Concrete Work
  • Landscape Construction
  • Paving
  • Concrete Coring
  • Loam, Mulch, Stone & Sand
  • Trucking
  • Plowing
Callahan & Montalto Site Construction LLC has served as a leader in residential and commercial construction in the Central Mass area for the last 20 years.


CMSC LLC. offers affordable and quality site excavation and utility services throughout Massachusetts, New Hampshire, Connecticut, and Rhode Island.
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Our pledge is to establish lasting relationships by exceeding clients’ expectations through excellent performance.  From design conception to project completion, CMSC LLC. is your trusted choice.


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CALLAHAN & MONTALTO SITE CONSTRUCTION

 800 MAIN STREET,
​ HOLDEN, MA 01520

OFFICE: 508-210-0331
​ FAX: 508-829-0500
CELL: 774-696-1204