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Top Sliding Glass Door Replacement & Installation in Greenwich, Connecticut Ranked

Replacing a sliding glass door is a significant home improvement that enhances your living space, energy efficiency, and property value. In Greenwich, where architectural style meets New England weather, choosing the right patio door involves balancing aesthetics, performance, and durability. This guide will help you understand your options for sliding door installation, from materials and glass types to local considerations, so you can make an informed decision and connect with qualified professionals for your project.

Prestige Window Works Repair & Installation

Prestige Window Works Repair & Installation

1129 Northern Blvd Suite 404B, Manhasset, NY 11030

Prestige Window Works Repair & Installation is a window and door repair and installation company based in New York, NY. They specialize in window glass replacement, wood frame restoration, and the installation of double-glazed windows and doors. Serving Nassau and Suffolk Counties, they offer services including window and door mechanism repair, stained glass window work, and historic window restoration.

4.9
523 Reviews
Window King LLC

Window King LLC

1075 Morris Park Ave, Bronx, NY 10461

Window King LLC is a family-owned window replacement company based in Yonkers, NY, specializing in residential and commercial replacement windows and sliding glass door installation. Serving Yonkers and the surrounding Tri-State area, including Westchester, Fairfield, Orange, Rockland, Nassau, and Suffolk Counties, as well as parts of New Jersey and Connecticut, the company focuses exclusively on replacement windows and doors. Window King offers high-quality Okna windows and doors, including the Starmark Evo Composite window known for noise reduction and low U values. With over 20 years of experience, the company provides straightforward pricing without high-pressure sales tactics.

4.9
276 Reviews
Window World Westchester

Window World Westchester

134 Marbledale Rd, Tuckahoe, NY 10707

Window World Westchester is a window replacement and sliding glass door installer serving Yonkers, NY. The company specializes in energy-efficient windows, doors, siding, and other exterior remodeling solutions. They use materials proudly made in America and provide comprehensive warranties on their professionally installed products. Established in 2020, Window World Westchester combines the customer service of a local business with the backing of a nationally recognized brand.

4.9
119 Reviews
Kenemax Windows

Kenemax Windows

22-68 31st St #56080, Astoria, NY 11105

Kenemax Windows is a New York, NY-based company specializing in window and sliding glass door installation, repair, and replacement. Established in 2010, they serve both residential and commercial clients, offering tailored solutions including consultations, drafting, engineering, and maintenance. Their expertise includes compliance with local building codes and working on new construction, historic, and renovation projects.

5.0
52 Reviews
Prestige Window and Door Repair Connecticut

Prestige Window and Door Repair Connecticut

500 West Putnam Avenue Suite 400B, Greenwich, CT 06830

Prestige Window and Door Repair Connecticut is a window and door repair and installation company serving Yonkers, NY, and nearby areas in Connecticut and New York. With over 10 years of experience, they specialize in window and door repairs, IGU and mirror replacements, wood framing restoration, and sliding glass door installation. Their services include repairing stained glass, jalousie and louver windows, sunroom windows, and historic window restoration. Prestige offers a 10-year warranty on glass units, ensuring long-term protection for their work.

4.9
87 Reviews
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Why Replace Your Sliding Glass Door in Greenwich?

A new sliding glass door does more than just improve access to your patio or garden. For Greenwich homeowners, an upgrade can address specific local needs. Older, drafty doors are a major source of energy loss, leading to higher heating bills in winter and cooling costs in summer-a critical factor in our variable climate 1. Modern, energy-efficient patio doors with features like Low-E glass and insulated frames can significantly reduce these costs while improving indoor comfort 2.

Beyond energy savings, new doors enhance security with improved locking mechanisms, reduce outdoor noise from busy streets with sound-dampening glass, and instantly refresh your home's curb appeal and interior aesthetic. For properties near the coast, impact-resistant glass options provide essential protection against severe weather 1.

Understanding Sliding Glass Door Styles

The term "sliding glass door" encompasses several styles, each offering different benefits for your Greenwich home.

  • Standard Sliding Doors: The most common type, featuring two panels where one slides horizontally past the other. They are space-efficient, cost-effective, and offer a clean, modern look.
  • French Sliding or Hinged Patio Doors: These offer a more elegant, traditional appearance. They typically feature two hinged doors that swing open, providing a wider, unobstructed opening. While sometimes pricier, they can add significant architectural charm 1 3.
  • Multi-Panel Sliding Doors: Ideal for creating a seamless transition to outdoor spaces, these systems have three, four, or more panels that slide and stack. They are perfect for wide openings and maximizing views and natural light 4 5.

Choosing the Right Frame Material

The frame material impacts the door's insulation, maintenance needs, longevity, and cost.

  • Vinyl: A popular, budget-friendly choice in Greenwich. Vinyl frames are low-maintenance, resist moisture and rot, and provide good thermal insulation. They are available in various colors but offer less structural strength than other materials 2.
  • Fiberglass: Known for exceptional durability and energy efficiency. Fiberglass frames are strong, resist warping and denting, and can be painted to match your home's trim. They often mimic the look of wood and provide superior insulation, making them a great long-term investment 2.
  • Wood: Offers timeless beauty and excellent natural insulation. Wood frames, such as those from premium brands, are often used in high-end Greenwich homes. However, they require regular painting or staining to protect against the elements 5.

Glass and Glazing Options for Performance

The glass you choose is arguably the most important factor for performance. Modern glazing technologies offer solutions tailored to Greenwich's environment.

  • Double-Pane Glass: The standard for most replacement doors. Two layers of glass with an insulating argon gas fill between them provide a baseline of energy efficiency and noise reduction.
  • Low-E (Low-Emissivity) Glass: A nearly invisible coating applied to the glass that reflects infrared heat. In summer, it helps keep your home cool by reflecting outdoor heat; in winter, it reflects indoor heat back inside. This is a highly recommended feature for managing energy costs year-round 1 6.
  • Triple-Pane Glass: Incorporates three layers of glass and two gas-filled spaces. This offers the highest level of thermal insulation and soundproofing, ideal for homes near busier areas or for those seeking maximum energy savings 1 4.
  • Impact-Resistant Glass: Constructed with a durable interlayer, this glass is designed to withstand high winds and flying debris. It's a prudent choice for coastal properties in Greenwich to enhance storm safety 1.

Key Features for Enhanced Efficiency

Beyond the glass, look for these features to ensure your new door performs optimally:

  • Insulated Frames: High-quality frames have multiple internal chambers that trap air, creating a thermal break that prevents heat transfer and reduces drafts 2 6.
  • Warm Edge Spacers: These separate the panes of glass at the edge of the unit. Modern non-metal spacers reduce condensation and improve insulation at the glass's perimeter.
  • Quality Weatherstripping: Durable, compressible seals around the door's perimeter are essential for blocking air and water infiltration.

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Cost Considerations for Greenwich Homeowners

The cost of sliding glass door replacement in Greenwich varies widely based on size, style, materials, glass features, and the complexity of the installation. Here's a general breakdown:

  • Basic Replacement: A standard-sized, double-pane sliding door with a vinyl frame typically ranges from $1,000 to $3,000, including professional installation 1 7.
  • Mid-Range Upgrade: A door with a fiberglass or composite frame, Low-E glass, and better insulating features generally falls between $2,000 and $5,000+ 4 8.
  • High-End/Custom Installation: Large multi-panel systems, doors with triple-pane or impact-resistant glass, custom wood frames, or complex architectural installations can cost $4,000 to $10,000 or more 1 5.

Remember, these are estimated price ranges. The final cost for your specific Greenwich home will depend on the exact product selected and the job's conditions. Always obtain detailed, written estimates from local installers.

The Professional Installation Process

A proper installation is critical to ensuring your new door performs as advertised. A qualified Greenwich installer will typically follow these steps:

  1. Initial Consultation and Measurement: A professional will assess the existing opening, discuss your needs, and take precise measurements to ensure a perfect fit.
  2. Product Selection and Ordering: They will help you navigate the options and place the order for your custom-sized door.
  3. Careful Removal and Preparation: The old door is removed, and the rough opening is inspected, repaired, and leveled to create a solid foundation.
  4. Precise Installation: The new door unit is set, shimmed, squared, and securely fastened to the home's structure.
  5. Sealing and Insulation: Gaps around the frame are filled with insulation, and high-quality caulk is applied to the exterior to create a watertight and airtight seal.
  6. Finishing Touches: Interior trim is installed, the door is adjusted for smooth operation, and hardware is tested.

When evaluating local companies, always verify they are licensed, insured, and have positive reviews from other Greenwich residents 9 10 11.

Frequently asked questions

Sources

Footnotes

  1. Cost of Replace Sliding Glass Door: Real Prices from Local ... - https://reecewindows.com/blog/cost-of-replacing-sliding-glass-doors/ 2 3 4 5 6 7 8

  2. The Complete Guide to Sliding Glass Door Installation Costs - https://www.gvexteriors.com/blogs/cost-of-sliding-glass-door-installation/ 2 3 4

  3. What Will it Cost to Replace My Sliding Glass Door? - https://www.thompsoncreek.com/blog/what-will-it-cost-to-replace-my-sliding-glass-door/

  4. How Much Do Sliding Glass Patio Doors Cost? 2026 - HomeGuide - https://homeguide.com/costs/sliding-glass-doors-prices 2 3

  5. How Much Does an Andersen Patio Door Cost? (2025) - HomeGuide - https://homeguide.com/costs/andersen-patio-door-cost 2 3

  6. Sliding Patio Doors for Homes | Energy-Efficient Glass Door Solutions - https://georgehousematerial.com/sliding-patio-doors/ 2

  7. Sliding Glass Doors Cost Guide 2025: What to Expect - https://www.joneswindow.com/blog-posts/sliding-glass-doors-cost

  8. How Much Does Patio Door Replacement Cost? | WW Tri-Cities - https://www.windowworldtricities.com/article/how-much-does-it-cost-to-replace-a-patio-door

  9. Affordable Sliding Glass Door Replacement - Greenwich Doors - https://greenwichdoors.com/greenwich-sliding-glass-door-replacement

  10. How Much Does It Cost to Install Sliding Glass Doors? | Angi - https://www.angi.com/articles/sliding-door-cost.htm

  11. Cost to Install a Sliding Glass Door | Styles and Materials - Modernize - https://modernize.com/doors/sliding-glass