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Average homeowner rating star icon4.4
Average homeowner rating
Verified reviews icon832
Verified window services reviews

Window pros in Rockville

Avatar for American Windows & Siding
American Windows & Siding
10516 Detrick Ave
4.72(
127
)
Approved Pro
American Windows & Siding
10516 Detrick Ave
4.72(
127
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
81 local quotes requested

American Windows & Siding of VA, Inc., specializes in custom windows, siding, doors, and roof systems. We use the finest quality products and labor available, and all our work is guaranteed for your peace of mind. Owner operated and employee owned, the company was established in 1991. We have two locations for your convenience - one in Fairfax, Virginia and one in Kensington, Maryland. We’ve been a member of the Better Business Bureau since 1993, and our customer service and proven track record of thousands of satisfied customers have earned us the reputation of an industry leader. All our workers are licensed, bonded, and insured. We have been top rated for the last eleven years in Washington Checkbook Magazine, a leading consumer publication for the DC metro area. In March of 2011 we were recognized as one of the "The Top 200 Remodelers" by Washingtonian Magazine and we have an "A" rating on Angie's List, receiving their Super Service Award for the past two years. With more than 13,000 jobs successfully completed in Northern Virginia, DC and suburban Maryland, we are proud of our reputation. Take a look at what our customers have to say. LICENSE # 49774.

"Had windows and doors installed by this company. The window installation went great. The bad news is that they do not seem competent at installing door hardware. My door has not latched properly since they made some unwanted modifications to the hardware (it worked perfectly before they started modifying it).have had them out three separate times to fix the issue they caused with the door latch and lock. Every “fix” they do seems to make the problem worse. I would steer clear of this company for door installations."

Christian S on April 2025

American Windows & Siding of VA, Inc., specializes in custom windows, siding, doors, and roof systems. We use the finest quality products and labor available, and all our work is guaranteed for your peace of mind. Owner operated and employee owned, the company was established in 1991. We have two locations for your convenience - one in Fairfax, Virginia and one in Kensington, Maryland. We’ve been a member of the Better Business Bureau since 1993, and our customer service and proven track record of thousands of satisfied customers have earned us the reputation of an industry leader. All our workers are licensed, bonded, and insured. We have been top rated for the last eleven years in Washington Checkbook Magazine, a leading consumer publication for the DC metro area. In March of 2011 we were recognized as one of the "The Top 200 Remodelers" by Washingtonian Magazine and we have an "A" rating on Angie's List, receiving their Super Service Award for the past two years. With more than 13,000 jobs successfully completed in Northern Virginia, DC and suburban Maryland, we are proud of our reputation. Take a look at what our customers have to say. LICENSE # 49774.

"Had windows and doors installed by this company. The window installation went great. The bad news is that they do not seem competent at installing door hardware. My door has not latched properly since they made some unwanted modifications to the hardware (it worked perfectly before they started modifying it).have had them out three separate times to fix the issue they caused with the door latch and lock. Every “fix” they do seems to make the problem worse. I would steer clear of this company for door installations."

Christian S on April 2025


Avatar for Nova Exteriors Inc
Nova Exteriors Inc
5568 General Washington Dr
4.38(
473
)
Approved Pro
Nova Exteriors Inc
5568 General Washington Dr
4.38(
473
)
Approved Pro
Customers say: Quality work
53 local quotes requested
30 years of experience

NOVA Exteriors, Inc. is a 12 time Angie's List Super Service Award Winner in several categories. We specialize in exterior remodeling and have over 50 years combined experience in the Metropolitan Area. We take pride in our work and we would appreciate the opportunity to showcase our services.

"NOVA Exteriors did a wonderful job replacing 3 exterior doors at our home. They checked every box one could ask for. Rob our sales rep was patient and understanding of our needs - even coming back a second time as we had a hard time deciding on what we wanted. Their team worked quickly and did a great job installing some beautiful new doors. We noticed after the installation that there were some imperfections on the hardware installed and they have agreed to replace them & their customer service was top notch. They responded quickly to some minor concerns and went above and beyond to fix the problem. While doors are never cheap, their price was right in line with other Provia vendors and 1/2 the price of Pella vendors. I'd highly recommend them."

Ryan B on April 2024

NOVA Exteriors, Inc. is a 12 time Angie's List Super Service Award Winner in several categories. We specialize in exterior remodeling and have over 50 years combined experience in the Metropolitan Area. We take pride in our work and we would appreciate the opportunity to showcase our services.

"NOVA Exteriors did a wonderful job replacing 3 exterior doors at our home. They checked every box one could ask for. Rob our sales rep was patient and understanding of our needs - even coming back a second time as we had a hard time deciding on what we wanted. Their team worked quickly and did a great job installing some beautiful new doors. We noticed after the installation that there were some imperfections on the hardware installed and they have agreed to replace them & their customer service was top notch. They responded quickly to some minor concerns and went above and beyond to fix the problem. While doors are never cheap, their price was right in line with other Provia vendors and 1/2 the price of Pella vendors. I'd highly recommend them."

Ryan B on April 2024


Avatar for Power Home Remodeling
Power Home Remodeling
12101 Tech Road
4.31(
838
)
Approved Pro
Power Home Remodeling
12101 Tech Road
4.31(
838
)
Approved Pro
Customers say: Quality work
139 local quotes requested
33 years of experience

As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, roofing, siding, doors, or attic insulation.

"Power Home Remodeling has been fantastic. We had them come out to replace our gutters and were very impressed with the quality of their work. The crew that did the job kept everything clean and organized; you wouldn’t have known they had been there, which is uncommon for many companies. We were so impressed that we are now moving forward with replacing our siding. Everyone at Power Home Remodeling has been incredibly helpful throughout this process, and we couldn’t be happier. We will work with them on future home projects."

Jonathan R on June 2025

As the nation’s largest full-service exterior home remodeler, we are backed by over 1,000+ Angi Super Service awards and more than one million happy customers. Why? Because we treat each job as an audition. An opportunity to prove ourselves to you. And the results speak for themselves. So make your home all it was meant to be with our unrivaled exterior services. Contact us today for a free, no obligation estimate on replacement windows, roofing, siding, doors, or attic insulation.

"Power Home Remodeling has been fantastic. We had them come out to replace our gutters and were very impressed with the quality of their work. The crew that did the job kept everything clean and organized; you wouldn’t have known they had been there, which is uncommon for many companies. We were so impressed that we are now moving forward with replacing our siding. Everyone at Power Home Remodeling has been incredibly helpful throughout this process, and we couldn’t be happier. We will work with them on future home projects."

Jonathan R on June 2025


Avatar for ROI Construction LLC
ROI Construction LLC
8378 Veterans Hwy
4.50(
8
)
Approved Pro
ROI Construction LLC
8378 Veterans Hwy
4.50(
8
)
Approved Pro
Customers say: Quick response
162 local quotes requested
51 years of experience

Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area! ROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!

"While I appreciate the company's attempt to rectify initial issues, our overall experience with this solar installation was unfortunately very unprofessional. The initial installation team demonstrated a lack of respect for our property, damaging plants, leaving debris (including an orange cone), and inappropriately using our private bathroom despite a readily available public restroom on the premises. Following my initial negative review, the company offered a Home Depot gift card as compensation, which wasn't particularly useful to us. They also offered to address some unrelated roof repairs they noticed, but I questioned why these weren't addressed during the original solar installation. Scheduling follow-up work proved equally frustrating. An appointment was scheduled for Wednesday, but the crew arrived a day early on Tuesday without prior communication. While I appreciated them attempting to complete the work ahead of schedule, they left the roof partially finished overnight, exposed to potential weather damage. Furthermore, the crew damaged another plant box during the Tuesday work and continued noisy work – including banging on the roof – until 8:30 PM on Wednesday, violating DC noise ordinances that typically require work to conclude by 7:30 PM. This put us at risk of a city violation. Throughout the entire process, communication was poor and the lack of consideration for our property and local regulations was deeply concerning. While I appreciate the attempt to make things right, the experience was ultimately not ideal and left us feeling very dissatisfied."

Jason M on April 2025

Why choose ROI Construction? Our Gold Standard guarantee is 100% customer satisfaction, 100% of the time! - It's that simple. No need to keep looking for “Contractor near me,” we are the top local Maryland and DC family owned Exterior company (est. 1974) that delivers the best results and a positive return on investment in the area! ROI also does a final walkthrough of every-single-job to ensure that we deliver a superior finished product for every ROI customer!

"While I appreciate the company's attempt to rectify initial issues, our overall experience with this solar installation was unfortunately very unprofessional. The initial installation team demonstrated a lack of respect for our property, damaging plants, leaving debris (including an orange cone), and inappropriately using our private bathroom despite a readily available public restroom on the premises. Following my initial negative review, the company offered a Home Depot gift card as compensation, which wasn't particularly useful to us. They also offered to address some unrelated roof repairs they noticed, but I questioned why these weren't addressed during the original solar installation. Scheduling follow-up work proved equally frustrating. An appointment was scheduled for Wednesday, but the crew arrived a day early on Tuesday without prior communication. While I appreciated them attempting to complete the work ahead of schedule, they left the roof partially finished overnight, exposed to potential weather damage. Furthermore, the crew damaged another plant box during the Tuesday work and continued noisy work – including banging on the roof – until 8:30 PM on Wednesday, violating DC noise ordinances that typically require work to conclude by 7:30 PM. This put us at risk of a city violation. Throughout the entire process, communication was poor and the lack of consideration for our property and local regulations was deeply concerning. While I appreciate the attempt to make things right, the experience was ultimately not ideal and left us feeling very dissatisfied."

Jason M on April 2025


Avatar for Unicorp Home Energy Services
Unicorp Home Energy Services
4511 Knox Rd
4.88(
596
)
Approved Pro
Unicorp Home Energy Services
4511 Knox Rd
4.88(
596
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
43 local quotes requested

Since 1987 UNICORP Home Energy Services has made window, siding and roofing projects a worry free experience for over 23,000 homeowners in MD, VA and Washington D.C. We are proud of our flawless record with the Better Business Bureau because customer satisfaction is our number one priority. Our past partnerships with Price Club (Costco) and more recently Pepco Energy Services are a clear indication that we understand the importance of providing substantial savings and value on all our energy saving products. ---- At UNICORP we don't believe in hard-sell tactics, and never make cold calls that interrupt you at meal time. We understand the importance of making the right decision without headache or high pressure. That's why more customers refer us to their friends and family than any other window and siding company. Not surprising when dealing with professionals that care about their customers and love what they do. ---- We thank you for visiting our profile and look forward to improving the quality, enjoyment and energy efficiency of your home. ---- Additional phone - (703) 462-6100. Additional fax - (877) 867-3726. Award winning. Additional DBA - Vinyl Technologies Energy Service. Additional contact name- Brian Weil. Additional email - [email protected].

"We just had Unicorp install new windows throughout our entire house. The window quality is excellent and the installation went very well. We were replacing 55 years old windows - and were very happy with the entire process, from selection, exterior color choices, and finally installation."

Sheila T on May 2025

Since 1987 UNICORP Home Energy Services has made window, siding and roofing projects a worry free experience for over 23,000 homeowners in MD, VA and Washington D.C. We are proud of our flawless record with the Better Business Bureau because customer satisfaction is our number one priority. Our past partnerships with Price Club (Costco) and more recently Pepco Energy Services are a clear indication that we understand the importance of providing substantial savings and value on all our energy saving products. ---- At UNICORP we don't believe in hard-sell tactics, and never make cold calls that interrupt you at meal time. We understand the importance of making the right decision without headache or high pressure. That's why more customers refer us to their friends and family than any other window and siding company. Not surprising when dealing with professionals that care about their customers and love what they do. ---- We thank you for visiting our profile and look forward to improving the quality, enjoyment and energy efficiency of your home. ---- Additional phone - (703) 462-6100. Additional fax - (877) 867-3726. Award winning. Additional DBA - Vinyl Technologies Energy Service. Additional contact name- Brian Weil. Additional email - [email protected].

"We just had Unicorp install new windows throughout our entire house. The window quality is excellent and the installation went very well. We were replacing 55 years old windows - and were very happy with the entire process, from selection, exterior color choices, and finally installation."

Sheila T on May 2025


Avatar for Aspen Home Improvements
Aspen Home Improvements
2653 Lititz Pike
4.30(
205
)
Approved Pro
Aspen Home Improvements
2653 Lititz Pike
4.30(
205
)
Approved Pro
Customers say: Quality work
141 local quotes requested
Free onsite estimate

Looking for top-notch service? Look no further than Aspen Home Improvements. Contact us today for all your window needs!

"I am still waiting for the return of my deposit as it has been a week since I put this review on hold after putting in the notice that day 24 June of cancellation by email and next day mail. As I have said before I am a disabled Vet, Senior citizen with health problems. I have copies of the emails that I sent on the days of 06/24/2023 and by next day Mail on the 27th notarized copies of the cancellation. Tried calling but went to voice mail. No work has been done so a rating cannot be done on the work, only the price. This job was way overpriced and never got the chance to compare. The salesman was a good person but I have my family doing it for thousands less."

Daniel S on July 2023

Looking for top-notch service? Look no further than Aspen Home Improvements. Contact us today for all your window needs!

"I am still waiting for the return of my deposit as it has been a week since I put this review on hold after putting in the notice that day 24 June of cancellation by email and next day mail. As I have said before I am a disabled Vet, Senior citizen with health problems. I have copies of the emails that I sent on the days of 06/24/2023 and by next day Mail on the 27th notarized copies of the cancellation. Tried calling but went to voice mail. No work has been done so a rating cannot be done on the work, only the price. This job was way overpriced and never got the chance to compare. The salesman was a good person but I have my family doing it for thousands less."

Daniel S on July 2023


Avatar for RIBA Construction LLC
RIBA Construction LLC
11325 Random Hills Rd
4.66(
129
)
Approved Pro
RIBA Construction LLC
11325 Random Hills Rd
4.66(
129
)
Approved Pro
Customers say: Terrific value
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
19 local quotes requested

RIBA Construction, LLC is a family owned interior and exterior repair/remodeling specialist based in Northern VA. Our specialties including: roofing, siding, windows, interiors in general, trim and trim capping, exterior doors, garage doors, driveways, etc. From our initial meeting with you to the completion of your project, from install to clean-up, our efforts are to provide excellent project management and superior skilled trades-persons. We operate with tremendously low overhead, which enables us to keep our prices reasonable. Our crews are specialized, with skilled trades-persons in each field of endeavor.

"Can't say enough good things about RIBA! They have done my windows, roof, chimney repair, gutter guards, and so much more. They are fast to respond, and do the job perfectly. They stand by their work, and are always responsive to any follow-up questions I have. It is hard to find contractors who are this dedicated, responsive, and capable. You can't do better, so be sure to check them out!"

Matthew F on March 2023

RIBA Construction, LLC is a family owned interior and exterior repair/remodeling specialist based in Northern VA. Our specialties including: roofing, siding, windows, interiors in general, trim and trim capping, exterior doors, garage doors, driveways, etc. From our initial meeting with you to the completion of your project, from install to clean-up, our efforts are to provide excellent project management and superior skilled trades-persons. We operate with tremendously low overhead, which enables us to keep our prices reasonable. Our crews are specialized, with skilled trades-persons in each field of endeavor.

"Can't say enough good things about RIBA! They have done my windows, roof, chimney repair, gutter guards, and so much more. They are fast to respond, and do the job perfectly. They stand by their work, and are always responsive to any follow-up questions I have. It is hard to find contractors who are this dedicated, responsive, and capable. You can't do better, so be sure to check them out!"

Matthew F on March 2023


Avatar for Liberty Windows and Siding Inc
Liberty Windows and Siding Inc
9520 Berger Rd
4.26(
42
)
Approved Pro
Liberty Windows and Siding Inc
9520 Berger Rd
4.26(
42
)
Approved Pro
Customers say: Terrific value
40 local quotes requested
32 years of experience

Liberty is a 2nd generation family owned and operated company. Offering the best in Roofing, Windows, Siding, Decks, Doors and Gutter material and installation. Financing Available with many options, Licensed, Insured and Certified we offer Free in-home consultations. Additional DBA - Liberty Commercial Roofing. Up to 18 months no interest, no payment financing available; please call for details!

"The company goes out of their way to ignore reviewing HOA policy. They installed doors that were not up to code based on HOA policy. More concerning for a small $1,000 balance of a $5,000 job, they threatened while saying good luck to me....to file a mechanics lien on my $2,300,000 paid off house. IT IS AGAINST STATE LAW TO FILE A MECHANICS LIEN AGAINST A RESIDENCE UNLESS THE VALUE OF THE JOB INCREASES THE RESIDENCES VALUE BY 15% OR MORE. They are threatening and go around every legal corner to get what they want including their bogus sales pitches."

Adam D on October 2024

Liberty is a 2nd generation family owned and operated company. Offering the best in Roofing, Windows, Siding, Decks, Doors and Gutter material and installation. Financing Available with many options, Licensed, Insured and Certified we offer Free in-home consultations. Additional DBA - Liberty Commercial Roofing. Up to 18 months no interest, no payment financing available; please call for details!

"The company goes out of their way to ignore reviewing HOA policy. They installed doors that were not up to code based on HOA policy. More concerning for a small $1,000 balance of a $5,000 job, they threatened while saying good luck to me....to file a mechanics lien on my $2,300,000 paid off house. IT IS AGAINST STATE LAW TO FILE A MECHANICS LIEN AGAINST A RESIDENCE UNLESS THE VALUE OF THE JOB INCREASES THE RESIDENCES VALUE BY 15% OR MORE. They are threatening and go around every legal corner to get what they want including their bogus sales pitches."

Adam D on October 2024


Avatar for General Construction Doctors
General Construction Doctors
3708 Greencastle Rd
New on AngiNew on Angi
Approved Pro
General Construction Doctors
3708 Greencastle Rd
New on AngiNew on Angi
Approved Pro
2 years of experience
Free onsite estimate

General Construction Doctors LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts and will always keep you educated about the work process. We look forward to earning your business.

General Construction Doctors LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts and will always keep you educated about the work process. We look forward to earning your business.


Avatar for Renewal by Andersen
Renewal by Andersen
552 7th Ave Suite 401
4.55(
65
)
Approved Pro
Renewal by Andersen
552 7th Ave Suite 401
4.55(
65
)
Approved Pro
Customers say: True professional
23018 local quotes requested
18 years of experience

Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation

"One window had bad wood around the frame. When we mentioned it to the contractor it wasn't addressed, and they installed the new window anyway. In Addition, on the same window the lower left corner of the window frame is loose and needs nailed back in."

Dan B on July 2025

Replacement Window Installation, Replacement Patio Door Installation, Replacement Entry Door Installation

"One window had bad wood around the frame. When we mentioned it to the contractor it wasn't addressed, and they installed the new window anyway. In Addition, on the same window the lower left corner of the window frame is loose and needs nailed back in."

Dan B on July 2025

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Showing 11-20 of 230

FAQs for window service projects in Rockville, MD

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.

Window replacement can become costly, especially if you’re replacing your whole home. There are a few steps you can take to help save money on the bottom cost while still giving your windows a facelift. 

  • Replace multiple windows at once to bundle your purchase 

  • Inquire about discounts, coupons, or special offers

  • Consider window repair as soon as you see damage to help prevent the need for replacement

  • Maintain your windows often by inspecting your windows for drafts, leaks, and cracks

There are certain window repairs that are cost-effective to DIY and relatively simple for homeowners to tackle themselves. Tasks like replacing a screen, replacing a lock, or sealing a window are typically under $30 and take minimal time to do yourself. However, if you need to replace your window or repair a broken double pane, it’s best to call in a professional window replacement installer to lend a hand. Replacing the majority or all of the windows in your home is a time consuming job and best left to a professional.

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.

The time it takes to replace a window is a total of four to 15 weeks. This time includes your initial consultation, appointments for measuring, as well as ordering and manufacturing your windows. For a smaller job, you can expect the total timeline to be on the shorter end, but for a whole house window replacement, it might take longer (or be split into multiple install appointments). Once your windows are created and ready to be installed, your window installer will take 30 to 60 minutes per window to install.

The Rockville, MD homeowners’ guide to window services
From average costs to expert advice, get all the answers you need to get your job done.
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Learn about the pros and cons of skylights to decide if adding a skylight to your roof is a good idea.
Share project details to get started.