Excavation &
​Utility Specialists

Safety and quality
can never be sacrificed.
- Tim Montalto, Owner of CMSC

     ​Callahan & Montalto Site Construction LLC has served as a leader with a commendable safety record in residential and commercial construction in the Central Mass area.

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

     Timothy Montalto, President and owner of CMSC LLC, has over 20 years of experience in the construction industry, providing quality service and top safety-rated work on every jobsite.
     CMSC delivers quality projects consistently on-schedule and under-budget.  We uphold the philosophy that a job isn’t finished until all parties are satisfied with the quality of work.
     Tim and his employees recognize the importance of safety and quality from conception to completion.  He has developed a committed team to complete each project to the last detail.
​
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
  • Equipment Rental

Recent Projects

Rockville Water Treatment Plant featured in New England Construction
CMSC LLC. is proud to be part of the construction team, conducting site excavation and performing utility work for the Rockville Water Treatment Plant, Vernon, CT.
​
AECOM Design-Build Project Boosts Capacity and Efficiency of Rockville Water Treatment Plant. New England Construction.   May 2016.


​For All Your Excavation Needs

RESIDENTIAL & COMMERCIAL
​  From small home alterations to large-scale water treatment plants,
retail chains, and banks - CMSC has done it all.
Local police & fire departments trust the time-tested experience of CMSC.
General Contracting

Trenching

Pipe Installation

Utility Connections & Hook-Up

Foundation Excavation

​Concrete & Paving

Excavation & Utility Services

Location & Hours


Callahan & Montalto Site Construction is a leader in providing invaluable construction services to our customers by creating a successful relationship during the construction process.  Our pledge is to establish lasting relationships with our clientele by exceeding their expectations and gaining their trust through excellent performance.

​Callahan & Montalto Site Construction

​Office
800 Main Street
​Holden, MA 01529
P: 508-210-0331
F: 508-829-0500
C: 774-696-1204
​
Yard
2264 Main Street
Jefferson, MA 

​MONDAY - FRIDAY
7am - 5pm

Callahan & Montalto site construction
 800 Main Street,
​ Holden, MA 01520
Office: 508-210-0331
​ Fax: 508-829-0500
Cell: 774-696-1204

Copyright © 2016