Google's Top-Rated Window Pros Near Merrillville, IN
Merrillville's 10 listings below come from Google Maps rather than a state license file. IECC climate zone 5A sets the energy bar for a Merrillville window job no matter which kind of list a contractor's name comes from. Checked October 2026.
Google Maps ratings checked · How we rank
5AIECC climate zone · ENERGY STAR Northern zone
Climate and energy performance in Merrillville
Lake County sees about 40.9 inches of precipitation and 26.6 inches of snow in a normal year.
Weather at that level is one more reason the flashing and sill pan under a Merrillville window matter as much as the glass sitting in it.
So ask any Merrillville contractor how they handle both, not just which brand they carry.
Data: U.S. EPA / DOE, ENERGY STAR, ENERGY STAR Version 7.0 Climate Zones by County/ZIP (Windows, Doors, and Skylights) (V7.0); Pacific Northwest National Laboratory (DOE Building America), Guide to Determining Climate Zone by County: Building America and IECC 2021 Updates (PNNL-33270) (2021 IECC), from the nearest NOAA station 3 mi away.
Google's top window installers serving Merrillville, IN
Ranked by Google rating weighted against how many people left one, so a perfect score from a handful of reviewers never outranks a strong average built on hundreds. That ranking is not a license check; call the state directly and ask for the contractor's license or registration number.
| Rank | Business | Google rating | Reviews | Category | Area | Google Maps listing |
|---|---|---|---|---|---|---|
| 1 | Glass Doctor of Crown Point | 533 | Window installation service | Crown Point 46307 | Google reviews | |
| 2 | Trim-A-Seal Home Improvements | 191 | Window supplier | Merrillville 46410 | Google reviews | |
| 3 | Liberty Siding and Windows | 139 | Window installation service | Crown Point 46307 | Google reviews | |
| 4 | Thermoguard Windows & Doors Inc | 72 | Window installation service | Hobart 46342 | Google reviews | |
| 5 | M&M Home Remodeling Services - Crown Point | 498 | Window installation service | Crown Point 46307 | Google reviews | |
| 6 | Global Window Replacement | 16 | Window installation service | Crown Point 46307 | Google reviews | |
| 7 | Clearview Windows & Doors | 9 | Window installation service | Griffith 46319 | Google reviews | |
| 8 | Deluxe Windows & Doors | 5 | Window supplier | Crown Point 46307 | Google reviews | |
| 9 | Coast to Coast Exteriors | 47 | Window supplier | Highland 46322 | Google reviews | |
| 10 | Apex Window Werks | 3 | Window installation service | Highland 46322 | Google reviews |
Questions to ask before you sign
- How long have you held your state license, and can I see the number?
- Is this a full-frame replacement or an insert into my existing frame, and why that one?
- Who pulls the permit, and does this change trigger an egress check on a bedroom window?
- What flashing and sill pan will you use, and in what order do you install them?
- If my home was built before 1978, is your crew lead-safe certified for this job?
- What's the completion date in writing, and what happens if the schedule slips?