Brennan Enterprises
7th year as a Best Pick
certified company
Based on 700+ reviews
Our Certification Process
Best Pick Guarantee
Verified General Liability Ins.
7th year as a Best Pick Call
"Since 1979, Brennan has taken a one-stop-shop approach to home improvement by offering a variety of products and solutions for your home. Our goal is to create customers for life by providing excellent customer service, the very best installation teams, and a variety of services at competitive prices."

Kerry Brennan | President
Company Information
Services Offered
Brennan Enterprises specializes in energy-efficient replacement windows and doors. The company offers a choice of vinyl, aluminum, wood-clad, fiberglass, and composite products from national and regional brands.
Services Not Offered
The company does not offer window or door repairs unless it is for a previous client.
Lifetime warranties are available.
Company History
The family-owned company was founded by Kerry Brennan in 1979.
Brennan appeared on Remodeling's 2015 Big 550 list and was named a Window & Door Top Specialist in 2014. The company is also an EPA Lead-Safe Certified Firm and an ENERGY STAR Partner.
Additional Information
Brennan provides specialty doors, such as bifold, multi-slide, and lift-and-slide doors. Brennan offers windows from numerous brands, including Andersen, Milgard, ProVia, and Ply Gem.
Areas Served
Plano/Frisco/Allen/McKinney, Greater Dallas, North Dallas, Southlake/Grapevine/Colleyville, Flower Mound/Lewisville/Highland Village
A selection of 700+ homeowner reviews:
“Brennan did the install of 16 windows. I'm still amazed at how professional and knowledgeable they were. I had no mess to clean up at any window. They even covered the shrubs outside the windows and worked around things that couldn't be moved. I can give them the best referral ever—an A+++. I would use them again without hesitation.”
“Brennan Enterprises did a great job replacing our windows. Everyone was very professional and knowledgeable. Follow-up was immediate. We'd absolutely recommend Brennan.”
“The install experience was wonderful. They handled taking down any window treatments and moving furniture. They cleaned up after, and they replaced the window treatments. Overall, I would give them a A+++ rating.”
“They did an excellent job. It was a quick and easy process.”
“We have used Brennan to replace 20 windows The Andersen windows meet and beat the reputation. The experience with Brennan is first class from the estimate to the install.”
“Very professional company from start to finish. Our salesman, Tom, was experienced, professional and low pressure. He listened to our concerns and addressed them. The installer, Howard and his assistant provided a clean and professional install. The windows look great.”
“We recently used Brennan for window replacement for our entire house and had a very positive experience with Brennan. Everything was managed in such a professional manner from the initial meeting for a quote, to the scheduling, to the installation and all communications throughout. The installers worked quickly and cleanly. We continue to be very satisfied with the windows we purchased, they are really great quality.”
“Brennan Enterprises did a great job, from selecting the windows through final installation and clean up.”
“My new windows are even better than I expected, and the installers were amazing.”
“Brennan installed my patio doors and a few windows. I have 10 more windows to go. It was really nice to have the same installer Frank perform the installation. I cannot give him enough accolades for his professionalism and skill. You wouldn't have known he installed windows because he cleaned up the space very well.”
“They did a very good job with the window installation. They were on time and finished when they said they would. We had a problem with the replacement French door which took three reworks of the door to get it to the proper size and door opening configuration. This wasn't a problem with the installer but from their door vendor. It was resolved and looks great.”
“Brennan was recommended by a friend who was very satisfied with the work they performed during their renovation. I too am very satisfied with the windows they installed for me. The quality of the windows is excellent and the workmanship is top-notch.”
“I am extremely satisfied with my new windows.”
“I needed windows for my new home and Kerry and the staff at Brennan were fantastic to work with. Great customer service, and they gave great advice on my purchase.”
“Brennan replaced a window for us, and we are very pleased with the results. The people were very friendly, and easy to work with.”
“We liked that they helped us understand the different types and features of various windows and then helped us identify the brand that met our preferences. They were very neat and dependable during the installation. They caught any flaws in the windows or caulking and repaired without prompting. Great communication.”
“Brennan was able to find me the size of awning window that I needed when other companies did not have that size.”
“Overall, my experience was a positive one from sales to installation. I would recommend Brennan Enterprises to anyone looking for replacement windows.”
“I love my new windows, and Brennan Enterprises did an excellent job. I would use them again.”
“We are very happy we chose Brennan for new windows. Quality product and excellent customer service. The installers are truly craftsmen. Very skilled and knowledgeable regarding home construction.”
“As a homeowner for 40 years, this was the best experience with major repair I've ever had. Service was superb. I will never use another company for widow/door, etc. they are the best.”
“Each step of the window replacement process was great. Each employee we dealt with was fabulous. The windows look so good we haven't even put up window treatments on some of them.”
“We were very pleased with the job that Brennan did in replacing the windows in our home. Cindi Brennan was very knowledgeable and went out of her way to get us the windows that met our needs and she followed up to make sure that we were satisfied with the results.”
“My windows were done professionally. The service guy was timely and was efficient.”
“Was recommended to Brennan to replace windows. They did a fantastic job, and I'm very pleased with the work. I will definitely use them to replace other windows in house and recommend them to others.”
“Very nice job for replacement windows.”
“I had a custom window made and they were very helpful in getting it made correctly.”
“The installers were very knowledgeable and skilled. They had to remove my shutters, and I was terrified they would ruin my painted paneling not to mention the shutters. I was shocked at how perfectly they removed and replaced the shutters and the casing. There was no damage and I was thrilled. They caulked and filled holes, looks just like it did originally. The windows are perfect too.”
“I liked their customer service and their product. I would say the sales rep was very good and seemed very honest. We also heard something good about it. Also, the installers—Frank, and I think a guy name Willie was with him—were the best we have ever seen, and we are kind of picky. They were so careful with our house, and they walked through the process of what they were doing. They were fast, but their workmanship was beautiful. Their caulk lines were beautiful. They installed windows and doors for the whole house. It took them two days, and they were gone by four on the second day. Frank, the installer, noticed when he unwrapped our sliding glass door that the handle had rubbed against something. He noticed it before I did, and he said, 'We are not going to install that.' He had the warranty people come out and replace it very fast. I only have good stuff to say about Brennan and the installers. If I could have him do all the work at my house, I would—he was awesome. They did a good job. Tom Leopard was our salesman, and he was very good. ”
“They had good workmanship and good people that were working there. They did windows for us. We hope for them to come back and finish them up soon; we just keep having things get in the way. We want to get more windows and doors, so there are more to get done by Brennan. We researched a couple of places, and then one day down in our neighborhood, we saw a couple of trucks and saw Brennan on them. The next day, I knocked on the person's door and said, 'Tell me about your windows.' She said, 'Come in; let me show you.' She was real excited about them. She was willing to talk about them and say how wonderful they had been, so I said, 'OK, let's put them on the list.' I think the first day I went, they were still working on them, and they gave me a business card. I was happy with the people that took the measurements and told me about the windows. I think it was wonderful—a great experience.”
“Mostly, I liked their responsiveness, and they were thorough in what they did. We did have one issue after installation that I probably would have never noticed, and they pointed it out and said that they were going to fix it. They were out a few days later and fixed it. They did 13 windows. The quality was great; I was very pleased. I think their responsiveness stood out, but even when I would call early on, they were very easy to work with. I heard from a friend about a specific brand of windows, and Brennan was one of the people that you could go through. When I talked with them, it was a no-brainer to go with them. The windows are holding up beautifully; we're just trying to figure out when to get more done.”
“They created a whole room for me out of glass. They're neat and clean, and they call you if they think they are going to be late, even though they're not. Even if it's ten minutes, they call. I have a deaf dog, and he fell asleep out there, and they didn't know that I was listening—I work at home. They are very quiet, and I heard Pete say, 'Walk around him—he's asleep.' How can anybody be so polite about somebody else's dog? That's wonderful—that's not part of their service. When they leave, the windows are clean, and they try not to step on anything when they replace windows. They put a sliding glass door in the dungeon of my laundry room. Now you can look out at the garden so you don't mind being there. They did several different projects. They are wonderful, and they are always real prompt. The first time, they put up a great, big wall, and it had to get special glass because, instead of having a solid glass wall, people usually have two windows—one above and one below it. I didn't want that, so they made it so that it could go all the way to the ground with two different doors. It goes out to the pool, so they put in a sliding door. If the weather gets too hot like it does in Texas, you can close it, or you can have an outdoor room. They went above and beyond to meet my needs. They would have come out and cleaned it for me, but they told me how to do it, and I did it myself. They fixed the screen because my dog ran through it. It was so clear that he ran into it, and it wasn't their problem, but they fixed it for me. I can think of a million more things for them. They are very polite, and that doesn't happen often; not many people are considerate of your privacy. My electric bill has gone down over 30 percent. I'm really upset that they don't do interior remodeling.”
“The salesman was not telling me a bunch of stuff; he was just a normal-speaking person—down-to-earth. I wanted somebody local who had been in business a long time. They had an accident—they dropped a pane of glass. They replaced two windows, and there were two slabs of glass, maybe four by seven. They took the old one out, and as they got to the front door, they dropped one in the front hall. They weren't frantic or anything like that, but they got after it. They got it cleaned up; of course, they didn't get every last piece of glass, but they worked on it for about 20 to 30 minutes to get it up. They didn't just halfway do it, and I thought that was nice. They were neat and clean. The people that came to do the windows were of course different than the one that came out to talk to us. I think they are OK, and everybody in the neighborhood said they look nice.”
“Brennan Enterprises was very efficient—they were just in and out, and it was just real easy. My neighbor watched when they did the work and said they were really quick. They were very professional, and the guy that came and checked the work also checked my doors. I'm glad I got my windows done with them.”
“We had doors done by Brennan Enterprises, and the installation went very well. We had new exterior doors put on and new storm doors. They totally get an A.”
“They did a good job on the windows they replaced for us, and they were professional. They weren't pushy. I liked the work they did, and I liked their attitudes. They gave a quote, and they stuck to it. They did it within the time frame that they said they would, and I've had no problems with it. At the time that we decided to replace the windows, Andersen was the only brand name that came to my mind. I heard good things about that. I picked the top three people and gave them a call, and they were the only ones who called me back. I liked them because it was family owned and had been owned for a long time. It wasn't a national chain. It was a local, family-operated thing, and that's why I picked them. They just seemed like they knew what they were doing.”
“We had used them before on the front half of our home, and we were remodeling the inside of our home somewhat, so we decided to go ahead and finish off the back side. We decided to go back to Brennan because we had a good experience with them the first time. They were prompt and responsive to our needs, and we didn't have a negative that we could attach to them. It wasn't like we were under any kind of a deadline, but we wanted to try and get the windows done in conjunction with the remodeling, and they were helpful in making that happen. When my wife and I talked about it, they came to mind because they had been easy to work with.”
“We only met one salesman, and he was only here one time to make the deal. Then, one man came out and took all the measurements. They were very efficient.”
“Brennan replaced my windows—excellent quality of work, and excellent customer service and communication.”
“Brennan removed several old external entry doors, and installed new doors. They were on time, did a professional job, cleaned up, and took away any debris or trash.”
“Brennan installed two large sliders and two bathroom windows.”
“Brennan replaced windows and doors throughout the house. Everyone at Brennan was responsive and helpful. The installation crew was hardworking, polite, efficient, and neat.”
“Brennan removed all my existing windows and replaced them with vinyl double-pane windows. Good communication, no haggling, and I got a fair price from the beginning. They honored a six-month-old quote even though pricing had increased on the product. The installers were on time, and completed the work in less time than expected.”
“Brennan replaced my entire house's windows, and added a window where a brick wall was—good customer service, delivered on time, and installed quickly.”
“They replaced all the windows in our home. They estimated a day and a half, and were able to do the work in one day. It was very positive. They were professional, and the work was done really well.”
“Brennan did vinyl window replacement on my one-story home.”
“We bought two security storm doors and a back door. Their service and installation were great. The installation was what I am most pleased with.”
“All windows, front and rear doors were replaced, and the addition of a storm door. The salesperson was friendly, honest, knowledgeable, and did not try to oversell for a more expensive product. The price of merchandise, quality, and expertise of workmanship were excellent. The installers are trustworthy, did an excellent job, and efficiently.”
“Brennan did installation of new windows. The installer was excellent, as was our salesman.”
“Brennan did window replacement on an 80-year-old rock house, and a clear glass door with sidelights—replacing the previous dining room double window. They had to cut through the rock to install the door assembly, and did a beautiful job. They also replaced a previous garage door with an extra-wide rain glass window with moveable sash lower windows. It turned out beautifully for the converted bedroom. Brennan Enterprises has always been very honest; explaining all the details of the installation, as well as the bid for the job. I've had them do a new build country home of 3100 square feet, as well as the renovation on the 80-year-old rock house. Both experiences have been positive, timely, and the work performed to specifications. Communication on scheduling was also very good.”
“Brennan installed new windows, and a door with an enhanced entranceway. Things fit well, and when the door needed a little tweaking a few days after installation, it was done.”
“Brennan installed ten vinyl replacement windows. A straightforward salesperson and team performed the installation.”
“Brennan changed out two sliding glass doors. Things were done very well—no problems, and quality workmanship.”
“Brennan replaced my windows. They were professional, and explained everything that would be happening with no high-pressured sales facts. The installers were highly trained—they were quick, and cleaned the areas afterwards.”
“Brennan removed old windows and installed new windows. Our salesman was very professional and polite. The window installers were prompt in arriving, installed in a professional manner, and cleaned up everything. They were also polite.”
“Brennan removed and replaced every window in my home. From customer service to sales to the installers, everyone was very professional. They knew their business, and it showed.”
“Brennan did window installation. The non-pressure sales approach was very positive and appreciated.”
“Brennan replaced my roof and replaced 22 windows. The work was completed as scheduled, and the workers cleaned up and were courteous.”
“Brennan provided and installed replacement vinyl windows for my home. I was very impressed by the installers. They worked efficiently—very meticulous in their work, and very neat and clean. ”
“Brennan installed new windows. They completed the work timely.”
“Brennan installed new windows and entry doors—positive. We did our homework with three different companies—our decision was not solely based on price, but on a product a company was prepared to stand behind and customer service. Brennan was honest, reliable, really took the time to understand what we wanted, and explained their products and process. Changing the entry doors to a house is a huge deal—we had to get it right, as with the wrong door we would lose curb appeal, and the right door has outstanding curb appeal. With Brennan, their sales rep helped us put together amazing custom entry doors, which look incredible. They helped us select the right product for us. Also, a real test of a company is when something goes wrong. We have numerous windows, a few of which are half-moons—what we did not realize is that the half-moons were not true windows, but built into the house. When installation for these 13 windows came, they would not fit. Brennan wrote off the cost of the 13 windows, and instead replaced the old glass with new glass a solution that we were happy with. Their installation team was courteous, respectful, and did an outstanding job of installing and cleaning up after themselves. The best way of passing on a compliment is to say that I would not hesitate to use them again; that is, if we ever move and need new windows or doors. To summarize, they really stand out for all the right reasons from the multitude of suppliers.”
“Brennan replaced four windows with great workmanship, and did good job of clean up. Brennan Enterprises' employees are always very polite and willing to fit the customers schedule—enjoyable to work with.”
“Brennan replaced 29 builder-grade aluminum windows with replacement vinyl windows. The work was done on time. The installation crew was very nice, and worked with us on which windows to do first and last.”
“Brennan was replacing the skin on my greenhouse—on time, and cleaned up at the end of each day. Friendly, knew what they were doing—went the extra mile at no cost to me.”
“Brennan replaced the rear entry door on my home with a smooth fiberglass door. Pete was the installer, and he couldn't have been more thorough or professional. He was very courteous, showed up when he said he would, and installed the door in a reasonable amount of time. The product they installed is excellent quality—we just love our new door. Overall, it was an extremely positive experience. We were kept in the loop—from the beginning of the job to the end of the job—when the door was installed, and even after the door was installed my salesperson contacted me to make sure everything was done to our satisfaction. All in all, it was a great experience—I just wish all contractors worked as professionally and expediently as Brennan.”
“Brennan's installers put new doors on the front and back entrances, along with a storm door on the north side. The doors are excellent, and the installation was professionally done. My guys finished on time, and they were a pleasure to have at my house.”
“Brennan replaced all nine windows in our house quickly and efficiently. The workers were personable, answered all of our questions courteously, and left everything clean afterwards—positive.”
“Brennan replaced my windows.”
“Brennan installed over 30 replacement windows in my home. Everyone I worked with at Brennan Enterprises was extremely professional and helpful.”
“Brennan installed new double-paned low-e windows, storm doors, and installed owner-purchased front doors, patio doors, and hardware. Excellent service—from the salesperson, Tom, through the installation handled by Howard and his team. Minimal invasion, and they cleaned up behind themselves as they worked. Good communication throughout the project.”
“We had new windows installed. When our windows were replaced, it was as if someone magically waved a wand, and new windows appeared. The installer was so good that there was no cleanup required at all.”
“Brennan replaced windows in my 40-year-old house. They did a great job, and I was comfortable having them work in my house—honest, trustworthy men.”
“Brennan did replacement of all my windows. The installers were excellent in every regard—clean, punctual, great communication, very professional, and thorough. They exceeded our already high expectations—very pleased.”
“Brennan did all-new windows and a sliding glass door. The installation was such a smooth process, and the installation guys were perfectionists.”
“I liked everything. They were on time. They did a great job with the installation and with cleaning up. They cleaned up from start to finish. It was very high quality. I would absolutely use them again. They installed sixteen double-pane windows, which have absolutely made a difference in my utility bill. They get an A+.”
“It was wonderful. The windows are beautiful. They make the house quieter and more energy efficient. They did a great job. Everything came, and they got it done in a day or so, I think. They're quiet and efficient. I just moved here a year ago, and I was referred by the next-door neighbor because they had windows done by Brennan seven years ago. She referred them to another neighbor behind us, so there are three or four houses in this area that have windows done by them. I'd give them an A+.”
“They were positive the first time they replaced all the windows, and now it's been positive the second time. He knows what he's doing. I told him what I wanted, and he was able to do it. All of my windows are really big. They're mostly picture windows, but they were able to order that glass and install it. He installed it perfectly and quickly—even faster than they told me they would install it. They cleaned up well, and they responded in a timely fashion. I used them on the first pair of windows in a bathroom or something that I wanted them to look at, and they contacted the Anderson representative to make sure that everything was seen to. I'd give them an A+ because I'm satisfied. I love my windows—they're what I wanted.”
“Everything was told up front. They did the job that they said they were going to do, and they did it in a reasonable amount of time. It was a wonderful experience. They replaced fourteen windows and three doors. They are the type of company I would use again. I found out about them through my neighbor. We had to have a follow-up, but we've been in communication. I would give them an A+++. They were just absolutely wonderful to work with.”
“The salesperson was very knowledgeable and explained the work that was going to be done in great detail before we decided to go with them. Then, the quality and the materials were excellent, and the installers did a fabulous job. We had all single-hung windows put in. The cleanup was excellent. They cleaned the windows for me. Everything was spotless—I didn't have to tear tags off and stuff. I would rate them as an A+.”
“The installers were awesome. They put in all new replacement windows. The windows were here when they said they would be. They came out here and got them in before my son's graduation party; they were able to squeeze us in. He worked half a day and then came back and worked half the next day. He worked in the rain, and he didn't leave a mess. We love the windows. We'd use the company again. We have another house that we're going to do it for. We chose them because my next-door neighbor had gotten them and told us they were awesome, so we had them come out and give us an estimate. They earned an A+.”
“Brennan was able to help me with my project last fall. They seemed to know what they were doing, and they did it very efficiently and effectively. They put in new windows with thermal glass all the way around the house. The windows on the front of the house weren't moveable windows, so they just replaced the glass with thermal glass. I like the product—it's cutting down on my utility bills. Their attention to detail and the cleanup were excellent. I chose Brennan because I found them on the Best Pick website, and it looked good. There weren't any outstanding complaints or anything, so I just went with my gut feeling. I'd give Brennan an A+.”
“Brennan put some windows in for me. They did what they said they were going to do when they said they were going to do it. They did an excellent job. I had some others come out, and I was not satisfied with the results and the information they gave me. Brennan came highly recommended by three of my coworkers. I would consider them in the future. I would say they were excellent—an A+.”
“They did everything on time, on schedule, and on budget. It was a high-quality installation, and there were friendly people to deal with. Their cleanup was excellent. They replaced all of our windows with double-pane windows. I haven't noticed a change in my utility bills yet; I think the real test will come this summer when it gets hot. I would absolutely use the company again. I'd give them an A.”
“This was my first time using Brennan Enterprises. They replaced five windows, and the quality of their work was excellent. I would rate them as an A+.”
“We liked the product very much. The workers were very professional and did their job. They actually worked very hard and caused us as few problem as they could. We were very impressed with them. They put in some storm windows. It's only been two months, but everything has held up fine. They did an excellent job. I'd say they're an A+ company.”
“Brennan replaced a door and our windows, and they did an amazing job. They showed us the different kinds of windows and went through all of that. The measurements, the quality of work, and the product were good. They were very respectful when they were here. They had great customer service. I probably went to the Best Picks website or something to find the company, and they had really good customer reviews. I'd give them an A+.”
“The salesman was very knowledgeable and knew his products extremely well, and the installers were very thorough and very neat. They cleaned up after themselves. There was no mess left over, and we've been very pleased with the products, too. I chose them from the Best Picks book. We had the patio doors and all the windows in the house replaced, and everything went very smoothly. They deserve an A+.”
“It was wonderful. The installation—everything—was done in a very timely manner. They did exactly what they said they would do, and they cleaned up very well. We got new windows. I would use them again for additional work. They're an A+ company.”
“Brennan did an excellent job. I'm really pleased with them. The guy who came out to do the estimate came back and did what he said he was going to do, and the guy he had working for him came early and finished what he said he was going to do that day. They followed through on everything they said they'd do, so it was a good experience. They replaced all my windows. I'd give them an A+ because they were excellent.”
“During the whole process, from sale to installation, they were all professional and first-class. They did everything exactly the way they said they were going to do it. We had all of the windows in our home replaced. They cleaned everything up great. There was no problem. They did a first-class job; it looks great, and we couldn't be more pleased. I would absolutely use them again. Everything they did was A+.”
“I felt they did an excellent job. I have no complaints. It was not the first job they did for me. They did what they said they were going to do, and they did a good job of it. There was one problem with the order—one window out of nineteen. They didn't charge me for the job until they had gotten the new window and redone it. I thought they were great. The most recent job was the windows. I'd give them an A+ rating.”
“It was good. We bought windows from them. When they delivered and installed the windows, they found a couple of flaws, so they sent a repairperson from the manufacturer out. It was really fast—three days—so we were real happy. They did nine double-pane windows and a sliding glass door. I would use them again. The salesman was fine, the installer was smart, and everything was fine. To the best of my knowledge, everything was A+. I'm very satisfied.”
“The quality of the work was good. They lived up to their commitments. I had to replace my windows. I liked their presentation and everything. I'd rate Brennan Enterprises as a solid A.”
“They had a quick install, and we didn't have any issues. They quickly turned around and resolved the issues that were identified. We had 23 windows replaced. We just got the regular up-and-down windows. We didn't have to do any cleanup, and I thought the workmanship was fabulous. I'd have to say they were an A. There were a couple of issues. They messed up some paint on the outside, but other than that, it was not a big deal.”
“Brennan did what they promised in a timely manner. They did 27 double-pane windows for me, and the quality of the work was very good. The cleanup was good, too; they didn't leave anything laying around. I would tell friends and relatives that they seem to be the best out there. I would use the company again, and I would give them an A.”
“I thought the installation crew was the highlight. They put in windows and a front door for me. My son had used them before; that's how I found out about them. They responded to my request for service in a timely fashion, and they cleaned up well afterward. They had a good selection of windows. Everything's been fine, so there were no follow-up services needed. I'd give them an A grade because I thought they did good work.”
“Brennan helped us very much. We got windows and doors for our entire house, and they gave us very good service. A realtor suggested the company to us. The workers were gentlemen, and they were very good workers. The cleanup was excellent; they did not leave a mess or anything. We specifically requested that some of them come back. They deserve an A.”
“I had a great, positive experience with Brennan Enterprises. They were wonderful. I'd rate them as an A.”
“They did windows for us. The work they did seemed to be very professional, and the two men who came out and did the work were very good. We were very pleased. I'm sure everything they did was very good. They cleaned up very well, too. You couldn't ask for better guys. They showed up on time, and they got it completed in time. Everything worked very well, so I'd give them an A+.”
“I had a good experience with Brennan. They did the windows in some of my home. I think they did it in two days. I chose the company because of word of mouth. They were very good. The customer service was really good. They were excellent—A+.”