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9 Years In Business

Company Details

  • Verified Licenses


1640 Boro Place, Fourth Floor
Mclean, VA 22102


  • Mon: 9:00 AM - 6:00 PM
  • Tue: 9:00 AM - 7:00 PM
  • Wed: 9:00 AM - 7:00 PM
  • Thu: 9:00 AM - 7:00 PM
  • Fri: 10:00 AM - 5:00 PM
  • Sat: 8:00 AM - 6:00 PM
  • Sun: Closed
View All Details & Credentials


Service Details

  • Residential Work

Areas of Expertise

  • Remodeling
  • Home Addition
  • Home Improvement
  • Kitchen and bathroom Remodeling
  • New House Construction
View All Offerings and Cities Served

Cost Information

  • Free Estimates
  • Warranty Offered
  • Credit Cards Accepted


31 Verified Reviews*
  • 5
  • 4
  • 3
  • 2
  • 1

Highly rated for

  • Quality
  • Value
  • Customer Service
*Reviews imported from Google have not been individually verified by HomeAdvisor.
Showing 1-10 of 31 results
5.0 Eric Banek Google Review

Would give them 10 stars if I could. Amazing to work with - communication was clear and easy, quality is top tier, value is the best around, and they work fast too. They truly went above and beyond and I would recommend them to anybody.

5.0 Roger Dass Google Review

Cosmo builder is the one and only builders that stand behind what they say, after singing the contract I got exactly what I signed for. Cosmo builders is the way to gooooooooo

5.0 Yasir Khan Google Review

Mohib is the man behind the plan. Understanding and professional. Quality is the best and timing was almost perfect. Love doing business with Cosmo builders.

5.0 Jewelry Empire Google Review

Cosmo builder is one of iconic builders all over U.S. the price they quote is perfect, the quality of work at its best. super pro team. soooooooooooooooooo happy from COSMO BUILDERS. All i know that COSMO BUILDERS will get my buiness every time

5.0 Hassan Aziz Google Review

Cosmo builders is the team and builders anyone need to work with. Super understanding team. Best quality work, and love dedication. MOHIB is the man. Thanks 🙏 Cosmo builders for making my dream come true

5.0 Emily S. Alexandria, VA

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

5.0 Torialai B. Fairfax, VA

Mr Alkozy is a professional individual that would be my pleasure to work him again

5.0 Kris M. Falls Church, VA

Mohib and his crew are amazing! Very clean and the craftsmanship is to notch. Would recommend Cosmo to anyone!

5.0 Scott U. Falls Church, VA

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!!

5.0 Uriana K. Alexandria, VA

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!!!


Cosmo Builders, LLC
Garage Construction DC
Basement Finishing
Framing and Electric work
Basement Finishing
Roof Replacement
Bathroom Remodeling
New Custom Home Construct
Kitchen Remodeling
Commercial Project

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