5 AC Replacement Contractors in Waltham, MA
Top-Rated AC Replacement Contractors in Waltham
LeBlanc Mechanical
“Two of three detailed reviews describe positive outcomes for complex dual-system repairs, with one customer specifically praising same-day resolution of…”
Masonry in Waltham, MA
“All six reviewers award five stars, with three explicitly naming team members (Oscar, Jason) and praising same-day response capabilities. Multiple reviewers…”
All AC Replacement Contractors (5 total)
Scott Robillard Plumbing & Heating
“Five of 8 reviewers specifically mention same-day or next-day service arrival, with two praising the…”
AC Replacement Costs in Waltham
Replacement costs for aging systems in Waltham. If repair cost exceeds 50% of replacement, replacement is usually more economical.
| Service | Low | Average | High |
|---|---|---|---|
Central AC (3-ton, basic) | $6,160 | $8,960 | $12,320 |
Central AC (4-ton, mid-efficiency) | $8,400 | $11,760 | $15,680 |
Central AC (5-ton, high-efficiency) | $10,640 | $14,000 | $17,920 |
Full HVAC system (AC + furnace) | $12,981 | $15,042 | $15,792 |
Plus ductwork replacement If existing ducts are aged/leaking | $2,352 | $3,360 | $4,480 |
| Repair cost threshold | 50% rule: if repair > 50% of replacement, replace | ||
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
AC Replacement in Waltham, MA: What to Expect
Waltham experiences dramatic seasonal shifts, with winter temperatures dropping to 22 F and summer heat climbing to 82 F with significant humidity. This climate pattern creates substantial cooling demands during summer months, making AC Replacement in Waltham a practical investment for homeowners. The local market includes five licensed contractors holding Massachusetts Refrigeration Technician licenses, with an average customer rating of 4.3 across 57 reviews. While heating dominates winter demand, the warm humid summers drive meaningful air conditioning needs throughout the Boston metropolitan area.
Pricing for central AC replacement depends heavily on system capacity and efficiency ratings. A basic 3-ton system runs $6,160 to $12,320, while a mid-efficiency 4-ton unit costs $8,400 to $15,680. For those seeking top-tier performance, a high-efficiency 5-ton system ranges from $10,640 to $17,920. Massachusetts law requires contractors to hold both a Refrigeration Technician License and either a Sheet Metal or Pipefitter journeyman or master license through the Division of Professional Licensure, ensuring installations meet recognized professional standards.
Customer reviews reveal distinct strengths among Waltham contractors. Masonry in Waltham earns consistent five-star ratings, with reviewers specifically naming Oscar and Jason while praising same-day response times and thorough post-installation follow-up. Homestead Plumbing & Heating Inc. receives six of seven five-star reviews for same-day emergency response, fair pricing relative to competitors, and professionalism across multiple service calls. LeBlanc Mechanical attracts praise for handling complex dual-system repairs, including one customer who highlighted successful same-day resolution of combined AC and floral cooler failures.
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All HVAC Contractors in Waltham, MA
Complete directory of 47 contractors — browse alphabetically
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All HVAC Contractors in Waltham, MA
Complete directory of 47 contractors — browse alphabetically