Comfort Systems USA Posts Historic 25% Gross Margins and $11.9B Backlog
Comfort Systems USA achieved over 25% gross margin, with mechanical and electrical segments at 24.9% and 26.9%, as Q4 backlog hit record $11.9 billion, nearly doubling year-over-year. Hyperscaler technology projects now comprise 45% of revenues, and modular capacity will expand from 3 million to 4 million square feet by end-2026.
1. Historic Margin Expansion
Comfort Systems USA achieved quarterly gross margins above 25% for the first time, with the mechanical segment at 24.9% and the electrical segment at 26.9%, driven by disciplined bidding, favorable contract structures and an increasing concentration in high-value mechanical, electrical and mission-critical projects.
2. Record Backlog Growth
In the fourth quarter, the company’s backlog reached an all-time high of $11.9 billion, nearly doubling from $5.99 billion a year earlier, led by strong technology-sector demand and new modular bookings making up more than half of the $2.4 billion sequential increase.
3. Capacity Expansion and 2026 Outlook
With hyperscaler technology customers now accounting for 45% of revenues, management plans to expand modular manufacturing capacity from 3 million to 4 million square feet by end-2026; while expecting seasonally lower margins in Q1 and tougher H2 comparables, the record backlog provides a durable growth foundation.