Connecticut Window Installation Service Guide
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Replacement Window Installation in Stamford

Replacement Window Installation in Connecticut

Replacement window installation covers swapping out old, drafty, or damaged windows for new units, whether that's a full-frame tear-out to the studs or a pocket (insert) replacement that fits new windows into the existing frame. In Stamford, that work has to account for older Fairfield County housing stock: pre-war colonials and Victorians with original wood frames, mid-century ranches, and newer construction near the waterfront that needs coastal-grade materials to handle salt air and storm exposure. We've listed 27 companies in this category, ranging from small local crews to larger regional installers.

What to look for before you sign a contract

Ask about the installation method (full-frame vs. insert), the window brands they carry (vinyl, fiberglass, or wood-clad), and whether they handle permitting, since Stamford requires permits for most window replacements that alter the opening. Get a written estimate that breaks out materials, labor, disposal of old windows, and any trim or siding repair. Check how they handle flashing and air sealing around the new frame, since a poor seal causes leaks and drafts no matter how good the window itself is.

How we score installers

Our rankings weigh licensing and insurance, warranty terms on both the product and the labor, responsiveness to quotes, and patterns in customer feedback about cleanup, timeline accuracy, and follow-up on punch-list items. See the full ranked guide to Stamford window installation services for how the 27 companies stack up, and read our methodology for the full scoring criteria.

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All replacement window installation in Stamford, ranked by score and relevance

We found 27 businesses offering replacement window installation in Stamford; 20 met the criteria for the scored directory. The order weighs each business's overall score by how much of its reviewed work is replacement window installation, so a lower-scored specialist can rank above a higher-scored generalist.

Best Glass LLC
5.0(183)✓ Google-verified

Fernando and his team respond quickly to calls, often scheduling appointments within days or even the same day. Reviewers consistently praise pricing as fair and reasonable, the crew's professionalism and politeness, and the care taken during installation and cleanup. Window and shower door work dominates recent praise. The team completes jobs on time, tackles non-standard requests like angled shower doors without hesitation, and stands behind the quality of glass and installation. Reviewers note excellent communication from quote through completion, with multiple mentions of receiving updates faster than promised.

Renewal by Andersen
4.8(1070)✓ Google-verified

Installation crews complete jobs in a day or two, leaving homes spotless and damage-free. Ryan, Greg, Janek, Reg, and George are named repeatedly for skill and courtesy. Fibrex material and custom solutions outweigh cheaper alternatives. Sales staff walk customers through every detail before work starts, with no pressure to oversell. Window and door replacements run without drama because technicians measure precisely and crews preserve trim and finishes. Warranties are highlighted as exceptional. Follow-up calls after installation are standard, and teams teach homeowners how to operate and maintain their new windows and doors.

Windows By Toll
4.8(92)✓ Google-verified

Rob and his crew deliver meticulous window and door work backed by the owner's hands-on presence on every project. Customers consistently praise fair pricing, rapid response times, spotless job sites, and the rare experience of speaking directly to an owner who adjusts scope and timelines to fit their needs rather than pushing upgrades.

The Window People
4.8(109)✓ Google-verified

Across two dozen recent reviews, installers and office staff consistently deliver on time with meticulous attention to detail and respect for the home. James, Nick, Ray, Trevor, Victor, and Ken are named individually for professionalism and care. Multiple reviewers praise competitive bids, accurate sizing, and worksite cleanliness that left zero dust behind. One older complaint about a $2,700+ window hardware mismatch went unresolved by ownership despite Marvin Corporate stepping in, though the recent review record shows no echo of this issue. The business handles replacement windows, sliding glass doors, entry doors, and storm doors across the replacement and repair range. Office staff like Melanie guide customers through permit processes and product selection. Newer reviews over the past three months emphasize responsiveness on emergency glass repairs and willingness to schedule faster than initially quoted. Energy efficiency gains are noted multiple times. Service area covers Stamford.

Egress Pros - Egress Window Installation Company
5.0(36)✓ Google-verified

Reviewers consistently praise Egress Pros for transparent pricing that doesn't feel gouging compared to competitors, with Deshon handling the sales and scheduling process and Carlos running installations efficiently. Work is completed in one day, properties left pristine, and homeowners report basements dramatically brightened and safer after installation. The company specializes in egress windows with foundation cutting expertise. Staff arrive early, communicate proactively by text and email through all phases, tape off plastic to contain dust, handle permits, and coordinate drain and pump installation when needed. Customers note the crew's politeness, respect for property, and professionalism consistently enough that repeat business is common.

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Gunner Roofing
4.8(640)✓ Google-verified

Strong execution during the job site work, with crews arriving punctually and finishing clean. Project managers like Joe and Andrew earn repeat business by handling problems on the spot, reimbursing for damage, and honoring promises after payment. The consistent tension: after-sales responsiveness falters, with customers waiting weeks or months for callbacks on warranty claims, repairs, and post-installation issues, sometimes with no response at all. Windows and siding projects show the same pattern. When a job manager stays engaged, customers leave five stars. When communication drops after the final walkthrough or invoice, minor issues (loose siding, gutters backing up with debris, minor install corrections) fester into frustration. Newer reviews show the company improving on some fronts, though after-sales speed remains a sticking point.

Kings of Glass
5.0(16)✓ Google-verified

Isaac and his crew earn consistent five-star praise for rapid response times, showing up the same day for measurements and delivering work on schedule. Customers note their professionalism, cleanliness on site, and willingness to tackle single-window jobs that larger companies turn down. The team handles replacement windows, repairs, skylights, French doors, patio doors, shower enclosures, and custom glass walls with equal attention. Quality materials and reasonable pricing stand out against competitors; online payment and straightforward communication make the process frictionless.

Executive Homes
5.0(13)✓ Google-verified

Reviewers consistently report smooth, professional projects from initial contact through cleanup. Communication is clear and proactive; Kevin leads a crew that arrives punctually, maintains clean work areas, and finishes efficiently-one customer had their entire house's windows replaced in a single day. Craftsmanship and trim work earn repeated praise, particularly on Pella installations. Repeat business is common, and customers consistently recommend requesting Kevin by name.

Express Kitchens: Stamford
4.5(22)✓ Google-verified

Express Kitchens handles kitchen and bathroom design, cabinetry, countertops, and fixtures across Fairfield County. Staff members like Frank and Larry are noted for flexibility when solving custom requests, prompt follow-up, and attention to detail in measuring and installation. No recent complaints appear in the review record.

WindowRama

#10WindowRama

76
4.6(28)✓ Google-verifiedPublishes prices

WindowRama installs and sells replacement windows, doors, and specialty window styles from a West Side Stamford showroom. Most recent reviews praise the knowledge and responsiveness of named staff like Dan and Manny, and customers report smooth projects with competitive pricing. However, one recent customer has faced a 4-month problem with wrong screens and unresponsive follow-up after payment, with no resolution offered.

Connecticut Glass & Mirror
3.9(22)✓ Google-verified

Most recent work earns strong praise for shower and mirror installations, with fast scheduling and clean outcomes. Older reviews flag inconsistent communication and professionalism; a recent screen replacement complaint shows items discarded without warning.

Window King of Connecticut
4.8(4)✓ Google-verified

Window King delivers competitive pricing and personalized service across sales, office coordination, and installation. Reviewers praise the mid-level and Okna 500 series windows as well-built, installers for working quickly and keeping worksites clean, and the owner for acknowledging satisfied customers.

Design Glass & Mirrors, LLC
4.8(29)✓ Google-verified

Design Glass & Mirrors installs custom mirrors, shower enclosures, and glass doors for residential and commercial clients across Fairfield County. Frank and his team (including Julio and Julia) earn consistent praise for precision work, quick turnarounds, and willingness to fix mistakes at no charge. Repeat clients span ten years, and they work regularly with custom kitchen designers and full-service builders on high-end projects.

Stamford Shower Glass & Mirror
3.8(22)✓ Google-verified

Recent work is solid: Luis and his crew deliver on-time frameless shower door installations with clean finishes and fair pricing. The business has a strong recent track record, though older reviews flagged communication gaps that do not show up now.

Home Services at The Home Depot
2.3(3)✓ Google-verified

Both recent reviews cite unhelpful staff and difficulty getting assistance. Review evidence is limited to two one-star ratings spanning a year. No detailed praise or service specifics appear in the inputs.

Leonardo Luxury Fenestration
No rating yet✓ Google-verified

Leonardo Luxury Fenestration supplies and installs steel, aluminum, wood clad, and specialty windows and doors for new construction projects across Connecticut and beyond. Review evidence is limited, so prospective customers should request references or portfolios before committing.

Ultra Glass, LLC.

#18Ultra Glass, LLC.

27 low data
No rating yet✓ Google-verified

Review evidence for Ultra Glass is limited. Their website states they handle window glass repair and replacement, insulated glass units for fogged windows, and custom glass work throughout Stamford and lower Fairfield County.

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Common questions about replacement window installation

How much does replacement window installation cost in Stamford?
Most homeowners pay somewhere between $500 and $1,200 per window installed, depending on size, material (vinyl vs. fiberglass or wood-clad), and whether it's a full-frame or insert replacement. Full-frame jobs cost more because they involve removing trim and sometimes siding repair. Get at least three itemized quotes since labor rates vary a lot between installers.
How often do windows need to be replaced?
Vinyl windows typically last 20 to 30 years, and wood or fiberglass units can go longer with maintenance. Signs it's time include fogging between double-pane glass, drafts you can feel around the frame, windows that stick or won't stay open, and visible rot or warping in the frame.
What should I expect during the installation?
A typical job takes one to two days for a whole-house replacement, less for a handful of windows. Expect the crew to remove old windows, set and level the new frames, insulate and seal the gaps, then finish interior and exterior trim. Ask upfront how they'll protect flooring and landscaping and how they dispose of the old units.
How do I judge the quality of a completed installation?
Check that the window opens and closes smoothly with no gaps at the corners, that caulking lines are clean and continuous both inside and out, and that there's no visible daylight or draft around the frame. A good installer will also walk you through the warranty paperwork and explain what's covered on labor versus the window itself.

Last updated 2026-09-20