About us
Cosmo Builders – Home Remodeling Contractor in McLean, VA Cosmo Builders is a Class A licensed and insured home remodeling contractor serving McLean, VA, Arlington, Alexandria, Fairfax, and the Northern Virginia (DMV) area. With over 14 years of experience, we specialize in kitchen remodeling, bathroom renovations, basement finishing, home additions, full home remodeling, and new construction. We provide a hands-on approach from design and permits to construction and final inspection, ensuring clear communication, reliable scheduling, and a smooth, stress-free process. Our team delivers high-quality workmanship, detailed estimates, and guidance with materials such as cabinets, countertops, tile, and finishes to keep projects on track. If you are looking for a home remodeling contractor near McLean, VA or a trusted general contractor in Northern Virginia, Cosmo Builders is ready to deliver professional, reliable results.
Business highlights
11 years of experience
Memberships & Affiliations
BBB
Amenities
Free Estimates
Yes
Warranties
Yes
Accepted Payment Methods
- CreditCard
Reviews
4.931 Reviews
| Number of Stars | Image of Distribution | Number of Ratings |
|---|---|---|
| 100% | ||
| 0% | ||
| 0% | ||
| 0% | ||
| 0% |
Filter reviews by service
Showing 1-25 of 31 reviews
Carol P.
Feb 2026
Google Review
If you’re looking for a reliable home builder in Tysons Corner, Cosmo Builders is the one. Skilled team, excellent service, and beautiful results. I’m extremely happy with my new home!
Carlos H.
Feb 2026
Google Review
Just recently finally finished our new space, We hire Cosmo Builders for 3 floor addition on the side of our house in Woodbridge. We add 3 rooms, 1 full bathroom, and one kitchenette. Work come out very nice and strong quality.
Their estimate and material allowance was great, even high quality products included. Contract was clear and cover all cost. Permit take more time with county, but construction was fast, and we didn’t even move out during work.
Cosmo design and construction Team handle design, permits, and construction, so process was smooth. Price was reasonable than other builders we got estimate from, and response always on time. We really happy with final result and look and we highly appreciate Cosmo Builders home addition contractor. We recommend to our neighbourhood
If you searching home addition near me or local contractor near me in Woodbridge or DMV area, Cosmo Builders is good choice.
Brian J.
Feb 2026
Google Review
When we decided to do new home construction in Fairfax, VA, we knew choosing the right builder was really important. We talked to neighbors, realtors, and people in construction, and the name Cosmo Builders kept coming up again and again. Honestly, nobody had anything bad to say. One person even said they wish they had used Cosmo Builders instead. That made our decision easy.
Shery O.
Feb 2026
Google Review
Cosmo Builders did a great job with the bathroom tile work, including replacing the vanity and shower fixtures. The work was clean, well done, and finished on time with no issues. We’re very happy with the results and gladly give them a 5-star review.
Leroy K.
Feb 2026
Google Review
We worked with Cosmo Builders for our home addition project in Tyson corner and overall the experience was really good. They are honestly one of the best home builders in Fairfax County we came across. From design and permits to construction and inspections, everything was complete in the right way. I and my partner really liked their details estimates, scope of work and easy process.
The new addition has an open layout with a large room and custom large size Andersen windows. The material quality was great, and they matched our existing exterior siding very well. The addition looks modern and also feels like it was built at the same time as the original house, not like something added later.
What we appreciated most was the clear pricing. They gave us a realistic base estimate with fair material allowance, and the project stayed within budget. No surprise costs, no last-minute changes. The home addition was completed on time, which is not easy to find these days.
We received regular updates and schedules, so we always knew what was happening. The whole process felt organized and smart, from planning to material ordering and daily communication. The crew was respectful, helpful, Clean, and easy to work with.
Cosmo Builders is a reliable home addition contractor in Fairfax county, and we would recommend them for new construction, custom home additions, and residential construction projects.
If you’re looking for a licensed home builder in Northern Virginia that does quality work and keeps things honest, Cosmo Builders is worth it. It’s always good to support trusted local contractors in the community. Thanks again.
Emily S.
Apr 2023
I recently had a luxury composite deck installed with cable railing and aluminum post by cosmo deck contractor. I found Cosmo and their team honest, committed, and on-time deck builder contractors in the area and I couldn't be happier with the experience and the result. From the very beginning, the team was professional and knowledgeable, offering expert pieces of advice on deck foundation, expansion, pulling permits process from the county, and the best different materials combinations and design options They worked with me every step of the way to ensure that the design was exactly what I wanted, and the materials used were of the highest quality from trex product and muzata cable railing product. The installation process was quick and efficient, with a focus on quality and attention to detail. The final result is stunning, with a high-end look and feel that has already added significant value to my home. I highly recommend cosmo deck company to anyone looking for top-quality composite decks, custom design, and installation services. Thank you for the outstanding work!" Best luck Mohibð thank you
Torialai B.
Mar 2023
Mr Alkozy is a professional individual that would be my pleasure to work him again
Kris M.
Feb 2023
Major Renovation Multiple Room Service
Mohib and his crew are amazing! Very clean and the craftsmanship is to notch. Would recommend Cosmo to anyone!
Scott U.
Sep 2022
We hired cosmo builders to build us a 2-car garage with leaving space above the garage. Since the area we live in only has street and ally parking. For safety measures and comfortability, once we had the budget, we had Mohib and the architect came over. They explained everything slowly and meticulously. They helped us from the beginning to finish. From drawings, pulling permit, scheduling the surveyor to draw property lines, making sure there was nothing underneath, and getting the job done. His guys were here on time as promised and worked very hard and finished our garage 1 weeks ahead of schedule. Iâ m so glad we made this moveâ ¦neighbors are looking into it as well!!
Uriana K.
Sep 2022
The entire team did a wonderful job replacing my basement staircase with. After plummeting down the basement steps, we felt they were not safe, searched the net and found Cosmo Builders. They came out and we discussed the dimensions of the treads we wanted and the next day I had my estimate. I feel it was very reasonable for oak steps. The whole crew was extremely friendly, professional, meticulous with their work and did a great cleanup job. They were response and kept me updates with any changes due to the weather. Overall, the whole process was 10/10!!!
Keven R.
Aug 2022
I recently upgraded to multiple recessed lights and a sub panel installed in my house. We wanted something new and be able to control the lights to our liking, why we switched to smart. Best decision ever! I was able to get an estimate right away. The team was very professional and did a clean job while installing all 8 lights and panel in a single day. Showed me that the lights can be controlled with my phone. The work was top notch. I would highly recommend Cosmo Builders!
Gary K.
Aug 2022
Cosmo builders completely transform one big office space into 3 private room spaces for more privacy. My team and I love what they have done. The process from drawings, pulling permits and the construction was smooth and perfectly done.We asked for some additional work be done in the middle of the remodel such as wall shelves for books and they worked with us to ensure it could all be completed on time.Our experience with this contractor was pleasant, and we continue to speak highly of them to everyone in the building. Looking forward to working with Cosmo in the future!
Maicle H.
Aug 2022
From the moment we contacted Cosmo Builders for a quote until the time the final inspection was approved by HOA and the County, the entire team at Cosmo was nothing but professional, responsive, and patient. Mohibhelped guide us through the design and material selection, we went with composite decking due to It being easier to clean and maintain without maintenance cost. Best investment made on the home on what turned out to be a beautiful deck just in time for summer. You guys are the best
Lorence L.
Aug 2022
Find a Custom Home Builder
Mohib and his crew did a fantastic job on our driveway, new walkway, and steps! My husband had very specific requests for the concrete mixture, underlayment, and finish since we have a steep driveway, and water kept getting into our garage. They went above and beyond what he wanted! Everything was done very professionally, and they did a great job cleaning up the work site! Also, they had the best quality work and price! We will be using them in the future. .I am so happy with their work. 5 stars absolutely. Thanks again cosmobuilders.
Tim D.
Aug 2022
We got a new vinyl fence installed by Cosmo Builders. Unfortunately, the old wood had to go. We walked outside one day to find our fence had been destroyed by our dog due to him keep trying to jump over. The number of times my dog has jumped over and got away, it was time to replace the fence. Mohib and his team were nothing but amazing. Not only was there install perfect, he made sure everything was how I wanted it (higher than the old fence), made sure all lines were not going to cause any damage to the property and cross the neighbors property line, The new fence definitely increases the value of my home. Thank you, Cosmo & team!
Carlos B.
Jul 2022
I had my carpet that was ruined but my sons dog replaced with laminate floor by Cosmo Builders. The project manager who is very helpful, competent, and knowledgeable about flooring products. He answered my questions. He even showed me the selection where vast designs of Laminate floor, also helped me match the flooring with whatâ s in the dining room, along with recommencing leveling the floor so I donâ t have to worry about it in the future. He visited my place to make sure my floor will be done on time. The crewwas reliable, punctual, and professional. They know what they're doing. They did an excellent job updating my flooring and I'm happy with the result. I would highly recommend them. Thank you again!!
Richard S.
Jun 2022
Cosmo Builders and the team are the best I have worked with. We were looking for the complete package for our home remodeling project. A company that could provide drawings, pulling the permit and the construction work due to being on a budget and getting it completed by a certain time. We are VERY pleased with the way our house is looking. They listened to our vision and worked with us as we finalized decisions, I have had several sets of drawings that were submitted to Fairfax County approved the first review with no comments, a real testament to the quality of their drawings.Enhancing all of this is Mr. Mohibs easygoing, friendly, and approachable personality. It is clear he has patience for questions and attends to all concerns about project planning and implementation. Highly recommend!!
Name D.
May 2022
Basement Remodeling
We been house searching for a while now due to needing more space and it was just not happening. I decided to add an addition of garage and finishing our basement of the house, and I do not regret it. Cosmo Builders, and their engineer gave me some great ideas for the floor plan, pulling permit, Construction materials and finishing materials around our budget. The crew did a clean and fast job and were very respectful and they complete project on time. Great experience working with Cosmo Builders. Good Luck, Dadfar
Response from Cosmo Builders, LLC
"Wow - thank you for sharing, Dadfar! Your recap of your project is exactly what we want to hear.....That we've completed the project to your high standards and that you are happy with the entire experience. You taking the time to post your thoughts means the world to us and we are thrilled that your experience with Cosmo Builders has been a positive one! Keep us in mind for your future projects! Thank you - Cosmo Builders"
Lisa P.
Apr 2022
Mohib and crew did an amazing job on our siding and new 2 new windows installation,They did everything that we asked of them and more. They were on time, neat and had great communication through the whole process. Obsessed with the new look and color selection we chose for the vinyl siding.
Response from Cosmo Builders, LLC
"Thank you for your glowing review, Miss.Lisa! I've shared your kind words with our team and I appreciate that you mentioned our performance in details. Our goal is to complete the project to your high standards and that you are happy with the entire experience. Please let us know if there is anything you need in the future! Thank you, Cosmo Builders"
Joe S.
Apr 2022
Our living room was getting a little too small for us, so we decided to go with Cosmo builders to add an addition and removal partition walls for us. after looking at the estimate. Mohib is very giving and from the looks of it he just wanted us to be comfortable and was willing to work us. It took a little longer than expected due to pulling permits but it was worth it. It turned out beautiful and cozy. My family uses the room more than the actual living room. Thank you cosmo for making it happen!
Response from Cosmo Builders, LLC
"Hey Joe! - Thank you for taking the time to post your review! We are so pleased you are happy with your new addition! Im sorry that pulling permits took a bit longer. The living room looks beautiful. Cosmo Builders & team is really happy that you and the family are satisficed. Please contact us for future projects! Thank you,- Cosmo Builders"
Robert L.
Apr 2022
Iâ  ve had been in contact with many companies regarding my roofing project. Cosmo Builders was one of the first ones to send somebody to check my roof, give me a hard estimate and explain what needed to be done. After comparing estimates from four companies, I decided to go with Cosmo Builders because I loved the customer service. Mohib explained me everything about materials, the scope of the job, etc. The team was on time, worked extremely fast, and finished the job very fast. They cleaned everything after they finish and overall were extremely professional. I couldn't be happier with my new roof.
Response from Cosmo Builders, LLC
"HI Sherman!! thank you for your 5-Star Review and glowing recap of your experience with us! . We know that every roof will eventually need to be reroofed, I appreciate that you've taken the time to share your thoughts - please do let us know when you are ready for house remodeling - we will be right there to partner with you on that project as well! Thank you , Cosmo Builders"
Sophia H.
Apr 2022
I have had been in contact with many companies regarding my roofing project. Cosmo Builders was one of the first ones to send somebody to check my roof, give me a hard estimate and explain what needed to be done. After comparing estimates from four companies, I decided to go with Cosmo Builders because I loved the customer service. Mohib explained me everything about materials, the scope of the job, etc. The team was on time, worked extremely fast, and finished the job very fast. They cleaned everything after they finish and overall were extremely professional. I couldn't be happier with my new roof.Excellent professional experience with Mohib from beginning to end. The new roof makes the house look New! The roofers were courteous, respectful, and cleaned the area as they finished each day. Would rate them a 5+ if I could. Great experience working with Cosmo Builders.I recently worked with Mohib from COSMO BUILDERS on roof replacement with asphalt shingleroof, I would have to say the whole experience was excellent. Mohib was responsive, knowledgeable, and professional throughout the entire process. Exceeded my expectations at every step. It is hard to find service professionals you can trust these days, but after working with Mohib and his crew they now have a customer for life. Thanks for the quality work and the professional experience. Highly recommend.
Response from Cosmo Builders, LLC
"Hi Sophia! We are so glad you loved our services, Cosmo Builders is here for you and your needs! We are so happy that your vision has come to a reality. We look forward to working with you again should you need services in the future. Thank you, Cosmo Builders"
Sophia J.
Apr 2022
Basement Remodeling
Cosmo builders and their crew are professional. They just had remodeled our basement from unfinished to finished basement and added a bathroom, washer dryer, Living room and office space for me. From the beginning of design and permit process Mohib has been incredible to work with. He is honest, hardworking, accommodating of my (endless) requests, and a perfectionist! He took care of several issues we came across (due to the house) without adding any stress or additional cost. and what a surprise for us when we go in to check and it is a hundred times better than we could have ever had imagined. Initially, we had so many ideas for the basement, and it was hard for us to choose, so we let the construction company decide on some indecisive aspects that my wife and I had, and we could not have made a better choice. Will certainly use their services when we decide to refurbish another part of the house
Response from Cosmo Builders, LLC
"Hello!!! Thank you so much for the feedback, we really appreciate it. It is gratifying to hear how much you enjoyed working with us, and I hope we exceeded your expectations. We always strive to keep our projects on time and on budget, and I'm glad that our efforts were so successful on your project Can't wait to work with you guys again! Take care Best, Cosmo Builders."
William R.
Apr 2022
Mohib and the guys at cosmo builders are amazing. They are so easy to work with and their work quality is impeccable. We have had them work on our house twice now. The first time we hired them to change hardwood flooring for our living room, the second project we hired cosmo for our master bathroom remodel and extension, because old bathroom was the worst part of the house for me. Not because I do not like its functionality, of course, but because it was just an old sad place that had been done more than 30 years ago. Now we have new fixtures, bigger space with new tub and new appliances and they even moved around some walls to gain extra space! Could not be happier!
Response from Cosmo Builders, LLC
"Hello, It was a pleasure working on our flooring and master bathroom. Thank you for trusting us with your project. It is clients like you that make our work truly joyful and rewarding. Looking forward to helping you with many other projects. All our best to you, Cosmo Builders."
Shireen J.
Apr 2022
Major Renovation Multiple Room Service
The builder was responsive, timely, professional, and grasped all our goals quickly without wasting time. The builder then converted our goals to technical specifications, took complete ownership of the project, and executed every phase smoothly and delivered an excellent finished product and service. We’ve used this company for varied types of projects and the professionalism was consistent across project types. I highly recommend this company!
Response from Cosmo Builders, LLC
"Hello Shireen! Thank you so much for thinking of us and setting the time out of your busy day to review us. Serving our customers is a joy and responsibility that we are proud of and that we take very seriously. Our crew is thrilled that you loved your experience with us and the end results. Wanted to thank you for coming back to us for more projects. We love working with you! Best, Cosmo Builders All our best to you,"
Licensing
Insured
Licensed*
Trade License Number
410522000129
Trade License Expiration
02/29/2028
State Contractor License Requirements
All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.
*Contact business to see additional licenses.
FAQ
Cosmo Builders, LLC is currently rated 4.9 overall out of 5.
Monday: 9:00 AM - 5:00 PM
Tuesday: Closed
Wednesday: 9:00 AM - 5:00 PM
Thursday: 8:00 AM - 6:00 PM
Friday: Closed
Saturday: Closed
Sunday: Closed
Cosmo Builders, LLC accepts the following forms of payment: CreditCard
Yes, Cosmo Builders, LLC offers free project estimates.
No, Cosmo Builders, LLC does not offer eco-friendly accreditations.
No, Cosmo Builders, LLC does not offer emergency services.
Yes, Cosmo Builders, LLC offers warranties.