*The Angi rating for Window And Door Contracting companies in Dover, DE is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
*The HomeAdvisor rating for Window And Door Contracting companies in Dover, DE is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.
Last update on December 15, 2025
Serving Dover, DE and surrounding areas
Approved
In business since 1972
Free estimates
Emergency services offered
"The crew Patsy sent did an excellent job in installing the new door that we purchased. A fair amount of field fitting was required which they handled professionally. We are very pleased with the work and would hire again."
+25
Serving Dover, DE and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 1992
Free estimates
Warranties offered
"Installed 5 windows, a bay window and a door. Very quick and efficient workers. They were on time on a very cold, sleety, day"
+24
Serving Dover, DE and surrounding areas
Approved
Super Service Award Winner
In business since 2002
Free estimates
Emergency services offered
"Great pricing for a last minute weekend job. I'm disabled and going through a divorce and absolutely could NOT paint that room with all the other work I needed to do on the house. Jermaine did a great job and kept us right on our selling timeline."
+81
Serving Dover, DE and surrounding areas
Approved
Super Service Award Winner
In business since 2013
Free estimates
Credit card accepted
"Lemar and Ryan were super helpful, quick and ready to get to work. Such a great job with my Sliding Patio Door."
Serving Dover, DE and surrounding areas
Approved (Corporate)
In business since 2000
Free estimates
Warranties offered
"Installed 22 new windows, 2 entry doors, and new sliding glass door. Outstanding service, price, and installation. Highly recommend."
+55
Serving Dover, DE and surrounding areas
Approved
In business since 2004
Free estimates
Emergency services offered
"Prasann was the window expert I dealt with and he was very nice in explaining the whole home genius process and giving me a good price on my windows. We went with the fusion model for the windows and he showed up to the estimate with a mask very cover friendly."
+78
Serving Dover, DE and surrounding areas
Approved (Corporate)
In business since 1991
Credit card accepted
Offers commercial services
"My name is Jason Haslbeck and I live in Chester County, PA. My wife and I have used Castle Windows for the replacement of all our windows, a new front door and now a new custom French Door slider (three separate project installations). Our sales representative, Roberto Munoz, has been an absolute pleasure to work with for all of our installations. Their customer service is excellent and their products are the best in the industry. Their lifetime warranty is legitimate and very valuable. Due to the Corona Virus, our latest project design consultation (French Doors) was done over the telephone using a ZOOM application. Very convenient technology and the presentation was very professional. On a personal note, our sales representative (Roberto) is a very faith based, honest human being and we have never been happier with a contractor or sales representative. I would highly recommend asking for Roberto Munoz as your sales representative as he is very knowledgeable, professional and courteous. Overall, from my experiences, Castle Windows is the best window and door company in the region. We did extensive research in comparing them to Pella, Anderson and other companies and Castle's product quality, installation and pricing was the best value by far. I would normally never take time out of my day to write a review, but my experience with Castle Windows (and Roberto Munoz) is one that deserves recognition. Jason & Hope Haslbeck Chester County, PA"
+13
Serving Dover, DE and surrounding areas
Approved
In business since 2020
Free estimates
Warranties offered
"Professional, friendly, explained what the problem was and fixed it. I'll be hiring them when I need a new roof!"
+24
Serving Dover, DE and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2007
Free estimates
Warranties offered
"Renewal by Andersen of Wyoming did an incredible job with installing windows in our home. Thank you to the team who did the install and to the company for creating these exceptional windows."
+2
Serving Dover, DE and surrounding areas
Approved (Corporate)
In business since 1997
Free estimates
Warranties offered
"Ryan, Eric and Matt did a great job waterproofing and installing sump pumps. They where onTime, professional and did a great job. They did fantastic work and very very professional the entire time. They took time to review different aspects of project that made me feel comfortable that they understood the job and had options for how I would like things done. Would definitely recommend this crew!! Thanks guys!"
+16
Door installation usually takes three and four hours, including removing the old door and frame, fitting the new door and frame in place, shimming it to make sure it’s perfectly level, and making adjustments to the hinges and locking mechanisms to ensure proper functionality. A door-hanging professional can replace an interior door in between one and two hours. Door installation will take significantly longer if your installer needs to create a wall opening, and it can take less time if the existing door frame remains.
If you have a problem with your window, such as broken glass, minor leaks, or a problem with your window being stuck, repairing the broken part might be a cheaper option than replacing the entire window. However, if you have a deteriorating window frame or major leaks, buying a new window will be the better long-term solution.
The average cost to install a door is around $1,100, but you could pay anywhere from $150 for a hollow-core interior door installation up to $2,000 or a high-end exterior door installation. There are a few cost factors to consider to get an accurate price, including whether your wall opening exists, the type of door, the quality and security of the door, whether you need to replace the frame, and the door size. You can expect to pay $150 to $700 for a standard 36-by-80-inch door and between $400 and $1,600 for an 80-by-48-inch door.
Window replacement costs between $180 and $410 per window, or an average of $280 per window. However, your specific replacement job could cost as little as $100 or as much as $750. Factors such as frame material, the number of windows you need, and the type of glass you order all impact the overall cost. For example, simple double-glazed windows will cost $3 to $6 per square foot, but the stronger tempered glass ranges from $12 to $14 per square foot.
It’s possible to install a door yourself if the wall opening already exists, but the work is rather complicated, and a professional installation is usually well worth the investment. For your door to work and close properly, you’ll need to shim and level the door frame in your wall perfectly, which can be difficult. Additionally, we recommend you always hire a professional door installer to place an exterior door, as mistakes during the installation process can lead to poor security for your home.
From average costs to expert advice, get all the answers you need to get your job done.
Discover the window-to-door conversion cost. Learn about average prices, cost factors, and tips to save on your window-to-door conversion project.
Find out the cost to replace weatherstripping. Learn about material and labor costs, cost-saving tips, and what impacts your total price.
Are there holes in your screen and a squeak in your hinges? We break down how much screen door repair costs from small fixes to total replacement.
While sprucing up your home’s facade, you may come across home exterior terms that are new to you. Talk like a pro with this list of key home exterior terms to know.
Our guide walks you through all the questions you should ask a window replacement contractor before hiring them to replace the windows in your home.
Wondering who to hire for window installation? Compare window installers vs. contractors and see how pros handle measurements, removal, and sealing.
