Sternos Glass in Baltimore: Residential and Commercial Window Installation with Same-Day Estimates
Sternos Glass is a full-service window installation company operating in the Baltimore area since the 1980s, handling residential replacements, new construction windows, and commercial storefront glazing. The company employs licensed installers and offers free on-site estimates, positioning itself between big-box retailers and smaller one-person operations that dominate the region's window market.
What Sternos Glass actually does
Sternos installs replacement windows, new construction windows, glass doors, skylights, and storefront systems. The company does not manufacture frames; it sources from major suppliers like Andersen, Pella, Marvin, and vinyl manufacturers, then handles measurement, ordering, and installation. For residential work, most jobs involve removing old single-pane or worn double-pane windows and installing new insulated units. Sternos also handles commercial projects: storefronts in Canton and Fells Point, office buildings, and institutional clients. The company is licensed and insured, and all installers complete background checks. Residential jobs typically take one to three days depending on house size and window count.
Services and pricing
Sternos charges nothing for estimates, which are conducted on-site and typically take 30 to 45 minutes. The company measures each opening and discusses frame material options (vinyl, wood-clad, fiberglass, aluminum), glass type (single-strength, double-pane, low-E coating, tempered), and hardware. For a typical Baltimore rowhouse replacing 12 to 16 windows, expect quotes in the $8,000 to $14,000 range for mid-grade vinyl double-pane units with standard hardware. Upgrading to wood-clad frames or specialty glass (low-E, argon gas fill) raises costs 20 to 40 percent. Commercial storefront installation is quoted per linear foot and varies widely; a simple 20-foot glass storefront runs $3,000 to $5,000 depending on frame type and whether existing frames are reused. Sternos does not charge separately for removal and disposal of old windows; this is included in the installation price. Payment terms typically require a 50 percent deposit to order materials, with the balance due upon completion. Call for current pricing; window costs fluctuate with material and energy-code changes.
Comparison to other Baltimore window installers
The Baltimore window installation market divides into three tiers. National chains like Home Depot and Lowe's offer vinyl windows starting around $300 to $500 per window installed, but use contract crews, often rotate technicians, and rarely customize openings beyond standard sizes. They suit budget-conscious homeowners willing to accept uniform frames and faster turnaround (one to two weeks). Local independent installers, many operating solo or with one helper, typically charge $400 to $800 per window and excel at custom work, odd-sized openings, and historic homes where period-appropriate frames matter. These operators work slowly because they are hands-on, but Baltimore's many 1920s rowhouses and Victorian properties create steady demand for them. Sternos occupies the middle: crew-based, licensed and insured, faster than a one-person shop but more adaptive than a national chain. Homeowners with 10 or more windows, commercial needs, or properties requiring coordination across multiple rooms (new construction, whole-house renovations) find Sternos more efficient than a solo installer. Those replacing two or three windows in a small apartment may pay less through Home Depot.
Who it suits and who it does not
Sternos works well for Baltimore homeowners with moderate to large window jobs (8 or more units), particularly in rowhouses and older homes where frame depth, sill conditions, and exterior trim detail require experienced installation. The company also serves commercial tenants and property managers needing quick turnaround and warranty coordination across multiple units. Homeowners in historic districts who need documentation for preservation review or very specific frame profiles (wood rather than vinyl, for example) should confirm Sternos carries appropriate materials; the company works with specialty manufacturers but may require longer lead times. Sternos does not handle window repairs (resealing, hardware replacement, broken pane replacement); for those, contact a glass shop or handyman. Renters and those replacing one or two windows may find Home Depot or a local independent less expensive.
First visit and estimate process
Call Sternos to schedule an estimate. A representative arrives at your home with a measuring tape and notes the condition of existing frames, any water damage or rot, and the opening dimensions. They discuss material and glass options, show samples, and explain the installation process (whether the job requires exterior caulking, interior trim repair, or frame shimming). The estimate is provided in writing and is valid for 30 days. Once you accept, Sternos places a materials order, which typically ships within one to two weeks. Installation is scheduled at your convenience; crews arrive in the morning and work through the afternoon. On completion day, they clean up debris, test all operable windows, and walk you through the new hardware and any maintenance notes.
Hours, parking, and logistics
Sternos operates Monday through Friday, 8 a.m. to 5 p.m., and takes calls for emergency glass replacement on weekends through an answering service. The company is based in Baltimore County but serves the city and surrounding suburbs. No appointment is required to call for an estimate, but scheduling one ensures a representative meets you at your home address at a set time. Parking at your home is the responsibility of the installation crew; they bring their own equipment and materials on a work truck.
Sternos Glass has held a foothold in the Baltimore market for four decades by staying local and managing projects large enough to justify their overhead while remaining small enough to adapt to older homes. For rowhouse owners and small commercial tenants, that balance matters.
