Top-Rated Window Replacement Companies in Charleston, SC
Charleston's 10 listings below come from Google Maps rather than a state license file. IECC climate zone 3A sets the energy bar for a Charleston window job no matter which kind of list a contractor's name comes from. Checked October 2026.
Google Maps ratings checked · How we rank
3AIECC climate zone · ENERGY STAR South-Central zone
What Charleston's climate means for your window spec
Weather at that level is one more reason the flashing and sill pan under a Charleston window matter as much as the glass sitting in it.
So ask any Charleston 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 4.1 mi away.
10 top-rated window replacement companies in and near Charleston
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 | Charleston Roofs and Windows | 680 | Window installation service | Ladson 29456 | Google reviews | |
| 2 | Top Tier Home Improvement | 467 | Window installation service | North Charleston 29418 | Google reviews | |
| 3 | Icon Window and Door | 44 | Window installation service | North Charleston 29405 | Google reviews | |
| 4 | Southern Industries Home Improvements | 777 | Window installation service | North Charleston 29406 | Google reviews | |
| 5 | Century Commercial Glass Systems | 154 | Window installation service | North Charleston 29418 | Google reviews | |
| 6 | The Window Source of the Lowcountry | 15 | Window installation service | Charleston 29492 | Google reviews | |
| 7 | The Glass Guru | 324 | Window installation service | Charleston 29407 | Google reviews | |
| 8 | Window Nation | 169 | Window installation service | Charleston 29407 | Google reviews | |
| 9 | Coastal Siding & Windows | 35 | Window installation service | Charleston 29407 | Google reviews | |
| 10 | Muhler | 79 | Window installation service | North Charleston 29406 | 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?