Delaware Doors LLC
Verified Pro
6½+ years online5.0
Window & Door Installation in Wilmington, DE
Compare 31 window & door installation contractors near you in Wilmington and surrounding area with an average rating of 4.7/5. Get free quotes, read reviews, and find the right pro for your project.
Last updated March 22, 2026
Most pros respond within 2–24 hours
Verified Pro Installers
Other Businesses in This Area
Diamond State Door
Brandywine Window & Screen
5.011 mo onlineDoors by Schaefer's Carpentry
4.9Fast Glass LLC
4.9~12 years onlineFull Circle Overhead Door LLC
4.96½+ years onlineHomecraft Inc.
4.927½+ years onlineMDP Exteriors
4.99 mo onlinePella Windows and Doors Showroom of Wilmington, DE
4.931 years onlineTycos Roofing and Siding
4.910½+ years onlineClark and Sons, Inc.
4.821½+ years onlineDelaware Express Garage Door Service, LLC
4.8~7 years onlineG. Fedale Roofing and Siding
4.89+ years onlineJ.W. Tull Contracting Services
4.8~11 years onlineLane Roofing & Exteriors
4.824½+ years onlineNewport Builders Windowland, Inc.
4.813+ years onlinePJ Fitzpatrick
4.827½+ years onlineNew Castle Glass (24/7 Emergency Glass Service)
4.62+ years onlineHomeStar Remodeling
4.513½+ years onlineRenewal by Andersen Window Replacement
3.511+ years onlineWindow & Door Installation in Nearby DE Cities
Other Services in Wilmington
Access Control & Intercom(43)Alarm System Installation(25)Appliance Installation(22)Artificial Turf Installation(29)Automotive Installs(4)Concrete & Paving(30)Deck & Patio Building(33)Electrical Services(26)EV Charger Installation(10)Fencing & Gate Installation(27)Fire Protection & Sprinklers(26)Garage Door Installation(20)
About Window & Door Installation in Wilmington
Window and door installation covers replacements, new construction, and upgrades to energy-efficient models. Modern windows with low-E glass and insulated frames significantly reduce energy costs. Proper installation with flashing and air sealing is as important as the window quality itself.
Typical costs: Replacement windows run $300–$1,000 each installed. Entry doors are $1,000–$4,000. Patio or sliding doors are $1,500–$5,000. A full-home window replacement (15–20 windows) costs $5,000–$15,000+.
Common projects include:
- Window replacement (vinyl, wood, fiberglass)
- Entry door installation
- Patio and sliding door replacement
- Storm window and door installation
- Energy-efficient window upgrades
Window replacements that don't change the opening size usually don't need permits. New window cutouts, door additions, or changes to structural openings require building permits.
Frequently Asked Questions
- How much does window & door installation cost in Wilmington?
- Standard vinyl double-hung replacement windows run $300–$700 each installed. Fiberglass and wood windows are $500–$1,000+. A full-home replacement of 15–20 windows typically costs $5,000–$15,000. Entry doors run $1,000–$4,000 installed depending on material (steel, fiberglass, wood).
- How do I find a reliable window & door installation contractor in Wilmington?
- Installation quality matters as much as window quality. Ask about flashing, sealant, and insulation around the frame — drafts and leaks usually come from poor installation, not the window itself. Get quotes that specify the exact window brand, model, and series.
- Do I need a permit for window & door installation in Wilmington?
- Same-size replacement windows typically don't need permits. Changing window sizes, adding new windows, or modifying door openings require building permits because they affect the wall structure. Your contractor should know which applies.
About NeedInstall
NeedInstall helps connect customers with local installation professionals across Wilmington and surrounding communities. Featured contractors have claimed their profile and verified their business information. Listings marked as "Verified Pro" have been confirmed by the business owner.