Window Replacement in Wilmington, DE
Professionally installed replacement windows for Wilmington homes, backed by our Lifetime Installation Warranty.
Serving DE & PA
Locally owned since 1989
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Multiple Brands
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Nearest Showroom
(302) 239-5600
Hockessin, DE 19707
Our Hockessin showroom is approximately 10 miles from Wilmington, about 20 minutes via DE-48 East.
Neighborhoods Served
Local Homes
Permitting
Climate Considerations
Find the Right Window Styles and Materials for Your Home
Explore window styles, materials, glass options, and brands below. Click any category to learn more.
Style: Casement, Double-Hung, Sliding, Picture, Bay, Bow, Awning
Window Styles to Choose From
Different window styles serve different purposes depending on ventilation needs, room layout, and architectural style. During your consultation, we’ll help you compare styles and determine what works best for your home.
Casement Windows
Casement windows are hinged on the side and open outward using a crank handle. They provide excellent ventilation and a tight seal when closed.
Often chosen for:
- Areas where airflow is a priority
- Kitchens, bathrooms, and hard-to-reach spaces
- Homes seeking strong energy performance
Double-Hung Windows
Double-hung windows feature two operable sashes that move up and down, allowing for flexible ventilation and easy cleaning.
Often chosen for:
- Traditional and historic homes
- Bedrooms and living spaces
- Homeowners who want classic style and functionality
Sliding Windows
Sliding windows open horizontally and are ideal for spaces where vertical opening is limited.
Often chosen for:
- Wide window openings
- Modern or transitional homes
- Rooms where ease of operation matters
Picture Windows
Picture windows are fixed windows designed to maximize natural light and views. Because they do not open, they offer excellent energy efficiency.
Often chosen for:
- Living rooms with scenic views
- Spaces where ventilation is not needed
- Paired with operable windows for balance
Bay Windows
Bay windows extend outward from the home and typically combine multiple window units to create additional interior space and visual interest.
Often chosen for:
- Living rooms and dining areas
- Homes looking to enhance curb appeal
- Creating seating or display space
Bow Windows
Bow windows are similar to bay windows but use four or more windows in a curved configuration, creating a softer exterior appearance.
Often chosen for:
- Homes with curved or softer architectural lines
- Expansive views and added natural light
- Elegant, design-forward spaces
Awning Windows
Awning windows are hinged at the top and open outward from the bottom, allowing ventilation even during light rain.
Often chosen for:
- Bathrooms and basements
- Placed above or below other window styles
- Areas needing privacy and airflow
Materials: Wood & Clad, Fiberglass, Vinyl
Window Material Options
Each window material option offers distinct advantages depending on your home’s style, performance needs, and budget. During your consultation, we’ll walk through these differences and help you select the best solution.
Wood & Clad Windows
Wood and clad windows combine classic interior warmth with durable exterior protection. Interior wood provides rich aesthetics and design flexibility, while exterior cladding helps protect against weather and reduce maintenance.
Benefits
- Timeless appearance, painted or stained
- Excellent insulation and comfort
- Cladding that resists rot, fading, and weather
- Broad design flexibility
Best for
Homeowners prioritizing design, craftsmanship, and long-term curb appeal.
Fiberglass Windows
Fiberglass windows are known for exceptional strength and stability. Because fiberglass expands and contracts at nearly the same rate as glass, seals remain tighter and performance stays consistent through temperature changes.
Benefits
- Extremely strong, stable construction
- Excellent energy and thermal performance
- Low maintenance with long-lasting finishes
- Slim profiles that allow for more glass and light
Best for
Homeowners focused on durability, efficiency, and long-term performance.
Vinyl Windows
Vinyl windows offer a practical, cost-effective solution with reliable insulation and easy upkeep. Modern vinyl windows are engineered for durability and consistent performance across a wide range of home styles.
Benefits
- Affordable replacement option
- Low maintenance with no painting required
- Good insulation and energy efficiency
- Dependable performance for everyday living
Best for
Homeowners seeking value, comfort, and minimal maintenance.
Glass Technology: Insulation, Light Transfer, Gas Fills
Window Glass Technology
Modern window performance depends as much on the glass package as it does on the frame. Today’s windows are rated using standardized performance values.
Low-E (Low-Emissivity) Glass
Low-E glass uses a nearly invisible coating to reflect heat while still allowing natural light to pass through. Most quality replacement windows today include some form of Low-E glass because of its impact on comfort and efficiency.
Values
- Low-E is usually listed as a feature rather than a number value.
- Different Low-E coatings may be used depending on whether the goal is better insulation, reduced solar heat, or a balance of both.
What it means for your home
Low-E glass helps keep heat inside during winter, reflect heat away during summer, and block ultraviolet rays that can fade flooring and furniture.
U-Factor (Insulation Performance)
U-Factor measures how well a window resists heat transfer. Lower numbers indicate better insulation.
Values
- Older or basic windows: around 0.40 to 0.50
- Standard replacement windows: around 0.30 to 0.35
- High-performance windows: 0.20 to 0.29
What it means for your home
Lower U-Factor values help reduce heat loss, drafts, and cold spots, especially during winter. Many homeowners notice more even temperatures near windows with lower U-Factor ratings.
SHGC (Solar Heat Gain Coefficient)
SHGC measures how much heat from sunlight passes through the window glass. It focuses specifically on solar heat, not overall insulation.
Values
- Lower solar gain: 0.20 to 0.30
- Moderate solar gain: 0.30 to 0.40
- Higher solar gain: 0.40 and above
What it means for your home
Lower SHGC values help limit overheating in sunny rooms, while moderate values can allow beneficial warmth during cooler months. The right range depends on window orientation, room usage, and personal comfort preferences.
Argon & Krypton Gas Fills
Many energy-efficient windows use argon or krypton gas fills between panes of glass to improve insulation. Argon is commonly used and provides strong insulation at a reasonable cost. Krypton is denser and typically used in higher-performance or thinner glass units where additional insulation is needed.
Values
Gas fills are usually listed as a feature, such as “argon-filled” or “krypton-filled,” rather than as a numerical rating.
What it means for your home
Gas-filled glass units insulate better than air-filled units and contribute to lower U-Factor values, helping maintain more consistent indoor temperatures and improved comfort.
Visible Light Transmittance (VLT)
In addition to efficiency and insulation, the amount of natural light a window allows into your home plays a major role in comfort and livability. Visible Light Transmittance, or VLT, measures how much daylight passes through the glass.
Values
- Higher light transmission: 0.50 to 0.70
- Moderate light transmission: 0.40 to 0.50
- Lower light transmission: below 0.40
What it means for your home
Higher VLT allows brighter interiors, while lower VLT can help reduce glare in very sunny spaces. A balanced VLT provides comfortable daylight without excessive brightness or heat.
Brands: Marvin and ProVia
Window Material Options
Each window material option offers distinct advantages depending on your home’s style, performance needs, and budget. During your consultation, we’ll walk through these differences and help you select the best solution.
Marvin
Design-forward windows with premium materials and extensive customization options.
Often choose for
- Architecturally detailed homes
- Wood and clad window applications
- Projects where design flexibility matters
ProVia
Engineered for durability and strong energy performance across a wide range of styles.
Often choose for
- Energy-efficient replacement projects
- Homeowners prioritizing comfort and long-term reliability
Wilmington Windows: What Makes This Market So Special
Wilmington is a diverse housing market. With three or four distinct architectural styles and eras, the windows that work in one part of the city are not always the right windows for another.
The oldest stock is in the dense rowhouse blocks, Trolley Square, the East Side, Wawaset Park, where brick row homes built between roughly 1880 and 1935 line narrow streets. These homes were built with large, single-light double-hung windows to match the proportions of high ceilings and decorative brick arches over the openings. Replacing them correctly means matching those proportions without altering the rough opening, which keeps the project in the permit-exempt category for most non-historic-district properties.
If your home sits within one of Wilmington’s City Historic Districts or Neighborhood Conservation Districts, and several rowhouse neighborhoods do, exterior alterations including window replacement require DRPC review. We are familiar with that process and can help you navigate it.
West of the city center, neighborhoods like Westover Hills and Brandywine Hills shift to mid-century detached homes, primarily 1930s through 1960s brick colonials and cape cods with smaller window openings. These homes are solidly built but their original aluminum or early double-pane units have long since lost their seal integrity.
One concern applies across all Wilmington neighborhoods: I-95 runs directly through the city, and traffic noise is a real quality-of-life issue for homes within a few blocks of the corridor. Acoustic-grade glass is not a premium upgrade in those locations, it is a practical one.
A Recent Wilmington Project
Location
Home Type
Product
Style
Frame
Scope
Joseph Drive, West Chester, PA
The Approach
The Result
What Homeowners Say About Our Window Installations
I recently had a Provia Door installed by Russ from Spring House. I was very impressed with the hard work and high quality of the installer, Russ. I appreciated the attention to detail and the door is beautiful. I would recommend Eric and his team from Hockessin.
Eric and his crew did a great job installing our 2 new sliding doors. Fixed the trim and cleaned up well! Doors look great 🙂
Thanks Eric and crew!
Spring House replaced all of my windows. My new windows are easy to operate; they are also well insulated and functional. I replaced my kitchen window with a casement window and it my favorite window in the entire house. From the initial sales appointment to the day of installation, everything worked seamlessly.
I recently had them back to install a new front door with matching storm door. My home has the best curb appeal. I love my front door. Great products and services, you will not be disappointed.
Spring House provided and installed my new front door entry system. The entire process went smoothly, the installation was outstanding and the price beat all other bidders. All of the employees were great to deal with and I highly recommend Spring House!
I generally do not leave reviews but felt compelled to do so , i have been working with Eric replacing windows in my home over the last 12 years and his men just completed the last window installation . They did an outstanding job very professional and personable , over the years there were some problems but one call to Eric and problems were solved . He stands 100 percent behind what he sells and installs .
Why Homeowners Choose Us for Replacement Windows
Replacing your windows is a significant investment. We make the process clear, consultative, and built around long-term value.
- Serving the Wilmington area since 1989
- Free in-home or showroom consultations
- Fast & free estimates in just 24 hours
- Access to top brands, no single-brand sales pitch
- Professional installation backed by The Spring House Lifetime Promise
Professional Installation You Can Trust
Every project is completed by our trained, in-house installation team with close attention to detail and proper sealing.
Precision Measurement
Exact measurements ensure proper fit and operation.
Professional Installation
Installed to manufacturer specifications.
Cleanup & Haul Away
Old materials and debris are removed.
Lifetime Support
We stand behind your installation and help manage warranties.
Common Questions from Wilmington Homeowners
Do my replacement windows require a permit in Wilmington?
For most 1- to 2-family homes in Wilmington, standard in-kind window replacement does not require a building permit, provided you are not altering the rough opening or the structure. The exception is properties within a City Historic District or Neighborhood Conservation District: those require a building permit and review by the Design Review and Preservation Commission (DRPC) before work begins. We can help you confirm your property’s status and, where review is required, coordinate the application.
My home is in or near a historic district. Can you match the original window proportions?
Yes. We work regularly with older Wilmington rowhouses and detached homes where preserving the original opening proportions and sill profile is part of the brief. Marvin Elevate’s wood/Ultrex line is well suited to these projects: the exterior fiberglass holds its dimension in Delaware’s humidity without vinyl creep, and the wood interior can be finished to match existing trim. We document the scope clearly before any permit application is filed so the DRPC review process has what it needs.
Is there a federal tax credit for replacement windows right now?
Not currently. The federal Energy Efficient Home Improvement Credit (Section 25C) expired at the end of 2025. Windows installed in 2026 do not qualify for that credit. If you had qualifying improvements placed in service before December 31, 2025, you may still be able to claim the credit on your 2025 tax return, but new installations this year are not eligible. We recommend confirming your situation with a CPA. There is no replacement federal credit for residential windows at this time.
Is painting the interior trim included?
Products can be ordered factory-finished, and we handle all the capping and exterior trim work of your project. We do not paint interior trim. We will replace your existing trim with primed trim, but the homeowner will need to paint that primed trim (or hire a painter) once installation is complete.
How is disposal handled?
We pack in and pack out each day, leaving your home as clean as we find it. All debris and old materials are hauled away by our crews and disposed of in our own dumpsters at our warehouse.