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Window & Sliding Glass Door Installation in Stamford

Window & Sliding Glass Door Installation in Connecticut

Window and sliding glass door installation covers everything from swapping out a single drafty double-hung in a Cove colonial to replacing a full wall of sliders on a Shippan waterfront property. The work includes removing the old unit, checking the rough opening for rot or square, setting the new window or door, flashing and insulating around the frame, and sealing it against water and air intrusion. For sliding glass doors, installers also have to get the track level so the panel rolls smoothly for years instead of binding or sticking within a season. Stamford's housing stock ranges from older Cove and Glenbrook homes with original wood-frame openings to newer construction and condo conversions downtown, so the crew you hire needs to know how to handle whatever the opening actually looks like once the old unit comes out, not just what the spec sheet says.

We track 18 window and sliding glass door installers serving Stamford. When you're comparing them, pay attention to whether they pull permits when required, whether they use their own installation crews or subcontract, how they handle old-window disposal, and what warranty covers labor versus just the product itself.

Our ranked guide to Stamford window installation services scores companies on factors like licensing, warranty terms, response time, and verified customer feedback, so you can shortlist a few before requesting quotes. Details on how we build those rankings are on our methodology page.

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All window & sliding glass door installation in Stamford, ranked by score and relevance

18 businesses, scored on recent reviews. The order weighs each business's overall score by how much of its reviewed work is window & sliding glass door 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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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.

WindowRama
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.

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.

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.

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.

K&C Home Services LLC
4.9(36)✓ Google-verified

Jorge and his team consistently deliver high-quality work with attention to detail, and most customers experience quick responses and on-time finishes. Clients praise the crew's professionalism and willingness to problem-solve during jobs, from carpentry to door and window installations. However, a serious dispute in one recent case involved changed quotes, repeated money requests over months, incomplete work, and litigation. While 95% of recent reviews are four or five stars, this unresolved conflict and the scale of the claim (20k in damages, active court case) represent a material consideration for buyers planning major projects.

Affordable Glass & Mirror of Stamford,LLC
4.3(30)✓ Google-verified

Stamford homeowners consistently praise Jerry and his team for fair pricing, polite service, and fast completion on glass and mirror work. Recent five-star reviews highlight their expertise with shower doors, mirrors, and custom projects, along with professional paperwork and scheduling. One complaint from years ago about phone estimates resurfaced in a one-star review three years back; recent work is praised for accuracy and attention to detail.

Oliveri Architectural Glass
5.0(18)✓ Google-verified

Across 18 reviews all five-star, customers praise Phil and his family-owned team for fair rates, speed, and clean work. Recent jobs ranged from 22 custom windows in a mid-century Wilton home to shower enclosures and conference-room glass, each completed on time and to budget.

Franklin Glass & Aluminum
4.3(15)

Franklin Glass has earned strong marks for fast work and reasonable pricing, but recent reviews raise concerns about reliability in returning calls and committing to jobs. Older reviews consistently praise their craftsmanship and approachable team.

Ultra Glass, LLC.

#17Ultra 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 window & sliding glass door installation

How much does window or sliding glass door installation cost in Stamford?
A single vinyl replacement window typically runs a few hundred dollars for the window plus installation labor, with wood or custom-sized units costing more. Sliding glass doors generally cost more than a standard window because of the larger glass panels, heavier frames, and track work involved. Get itemized quotes from at least two or three companies since material grade and old-unit removal fees vary a lot between installers.
How often do windows or sliding doors need to be replaced?
Most vinyl and fiberglass windows last 20 to 30 years before seals fail or frames warp enough to justify replacement. Sliding glass doors often need attention sooner if the rollers or track wear out, even if the glass itself is fine, so a repair rather than full replacement is sometimes the right call.
What should I expect on installation day?
Expect the crew to protect flooring and window trim, remove the old unit, inspect the opening for damage, set and level the new window or door, insulate and seal the gaps, and clean up debris. A single window usually takes an hour or two; a full house of windows or a large slider can take a full day or more.
How do I judge the quality of an installation after it's done?
Check that the window or door opens and closes smoothly without sticking, that there's no visible gap or daylight around the frame, and that the exterior caulking looks clean and continuous. Come back after the first cold snap or heavy rain and feel for drafts or check for water staining, since that's when a poor seal usually shows up.

Last updated 2026-09-20