Residential & Commercial Construction Experts Serving Northern Virginia & Washington, DC
For over 21 years, Cosmo Builders has helped homeowners, businesses, and government clients successfully build, renovate, remodel, and expand their properties. As a Class A Licensed Residential Building Contractor (RBC) and Commercial Building Contractor (CBC), we provide complete design-build, construction, remodeling, and project management services from concept to completion.
Whether you’re planning a kitchen remodel, home addition, custom home, office renovation, tenant improvement, restaurant construction project, or commercial build-out, our experienced team delivers accurate budgeting, reliable estimates, quality craftsmanship, transparent communication, and professional project management every step of the way.
One Team. One Process. Built Around Your Vision.
Trusted Residential, Commercial & Government Construction Experts Serving Northern Virginia
Why Choose Cosmo Builders?
What Sets Us Apart
- Class A RBC & CBC Licensed Contractor
- 21+ Years of Construction Industry Experience
- Accurate Construction Budgeting & Reliable Estimates
- Residential, Commercial & Government Construction Expertise
- Design-Build Project Delivery
- Dedicated Project Management
- Permit & HOA Coordination
- Architectural & Engineering Support
- Transparent Communication & Honest Pricing
- Organized Scheduling & Planning
- Quality Craftsmanship
- Code-Compliant Construction
- Warranty Protection
- We Deliver on Our Promises
Residential Remodeling & Construction
Whether you’re updating your kitchen, expanding your living space, building a custom home, or planning a major renovation, Cosmo Builders provides expert remodeling, new construction, and design-build services tailored to your lifestyle, budget, and long-term goals.
From planning and budgeting to permits and construction, our team helps homeowners create beautiful, functional spaces built for the way they live today and for years to come.
New Home Construction & Design-Build
Build your dream home with confidence. Our design-build process combines planning, budgeting, design coordination, permitting, and construction under one team, creating a smoother experience from concept to completion.
Recently Completed New Construction & Custom Home Projects in McLean Virginia
Kitchen Remodeling
Create a beautiful and functional kitchen tailored to your lifestyle. Our custom kitchen remodeling services combine smart design, quality materials, and expert craftsmanship to enhance everyday living and increase home value.
Recently Completed Kitchen Remodeling Projects in Fairfax & Arlington
Bathroom Remodeling
Upgrade your bathroom with luxury finishes, custom tile work, walk-in showers, modern vanities, Tub, and efficient layouts. We create comfortable spaces that blend style, functionality, and long-term durability.
Recently Completed Bathroom Remodeling Projects in Alexandria, Vienna & Great Falls
Home Additions & Whole Home Renovations
Whether you need more living space or a complete home transformation, our team specializes in seamless home additions, whole-house renovations, and structural improvements that enhance functionality, comfort, and property value.
Recently Completed Home Addition & Whole Home Renovation Projects in Woodbridge and Manassas
Home Additions, Garage Additions & Home Expansions
Need more space without moving? We help homeowners expand their existing homes with room additions, garage additions, second-story additions, and complete home expansions. Whether you’re adding square footage for a growing family, creating a larger kitchen, building a new primary suite, or adding an entire second floor, our team provides planning, design-build services, permitting, and construction management from start to finish.
Recently Completed Home Additions, Garage Additions & Second-Story Addition Projects Throughout Northern Virginia
Helping Homeowners Build, Remodel & Expand With Confidence
From kitchen and bathroom remodeling to home additions, custom homes, and whole-house renovations, Cosmo Builders provides expert planning, reliable estimates, quality craftsmanship, and personalized project management. Proudly serving homeowners throughout Northern Virginia with construction solutions designed for lasting value and everyday living.
Looking for a Trusted Commercial Contractor in Virginia or Washington, DC?
Class A Licensed Commercial Building Contractor (CBC) for Office Renovations, Tenant Improvements, Restaurant Construction, Government Projects & Commercial Remodeling
Cosmo Builders helps business owners, property managers, developers, and government agencies successfully plan, budget, renovate, and build commercial spaces throughout Virginia and Washington, DC. With over 21 years of construction industry experience, our team delivers reliable estimates, organized project management, permit coordination, and quality construction from concept to completion.
Office Renovations & Tenant Improvements
Create productive, modern workspaces with office renovations, tenant improvements, interior build-outs, conference rooms, and workspace reconfigurations. We help businesses maximize functionality while minimizing operational disruptions.
Recently Completed Office Renovation & Tenant Improvement Projects in Fairfax, McLean & Arlington
Restaurant Construction & Commercial Remodeling
From restaurant build-outs and commercial kitchens to retail renovations and customer-facing spaces, our team delivers quality construction, permit coordination, and project management to help businesses open and operate successfully.
Recently Completed Restaurant & Commercial Remodeling Projects in Alexandria and Washington DC
Government Construction & Construction Management
Cosmo Builders provides construction management, facility renovations, and improvement services for government agencies, municipalities, educational facilities, and institutional clients. Our team focuses on planning, compliance, scheduling, safety, and reliable project delivery.
Recently Completed Government & Institutional Construction Projects Throughout the DMV Area and abroad.
Building Better Commercial Spaces Across Virginia & Washington, DC
From office renovations and tenant improvements to restaurant construction and government projects, Cosmo Builders delivers reliable budgeting, organized project management, code-compliant construction, and quality results. Proudly serving businesses, property managers, and government agencies throughout the DMV region.
who we are
Cosmo Builders is a professional, full-service residential and commercial construction contractor with almost 20 years of experience serving customers in Northern Virginia. We provide both new construction and remodeling services to companies and small businesses in Fairfax and Arlington Counties.
Cosmo Builders performs construction and remodeling services for commercial establishments, offices, warehouses, and other commercially owned and operated locations in Northern Virginia and DC. We also serve the public sector and non-profit organizations.
We are proud to offer these same services for residential customers in Northern Virginia. We enjoy designing home offices, whether you are remodeling a room or needing to build an addition. While we’re at it, we can offer you additional residential remodeling services for kitchens, bathrooms, and more.
We handle everything – design, permits, framing, flooring, electrical, plumbing (if necessary), interior and exterior painting, and more, depending on the project. Whether you are starting a new business, expanding an existing one, or just need an upgrade in facilities, Cosmo Builders is here to help your organization be a success.
COMMERCIAL CONSTRUCTION & REMODELING
You want your commercial building, construction, and remodeling projects in NOVA to be completed safely, professionally, eco-friendly, and using modern styles and technology. As a top commercial contractor in NOVA, Cosmo Builders can help you with commercial building projects of any size. We handle all construction projects from new commercial locations to major remodels, as well as simple improvements, upgrades, and repairs. We are one of the few commercial contractors that provide customized solutions for your business’s unique needs.
We work with a wide variety of industries and building types, including residential and commercial project: Cosmo Builders can handle every part of the project, allowing you to run your business or manage your organization without worry.
DESIGN-BUILD
Cosmo Builders offers full-service, turnkey results that set us apart from other design/build firms. We do it all to your specifications, from start to finish, within your timeframe and budget. As part of our design-build services, we handle all aspects of design and construction, including pulling permits and getting final sign offs. We also partner with a professional designer company that does all drawings, a freelancer architect, and interior designers to design your project from floor plan to finishing touches. Having one point of contact for your design-build construction or remodel project in Virginia is highly beneficial to our customers. By hiring Cosmo Builders for your commercial or residential project in Arlington, Fairfax, DMV Area, or Washington DC, you know that your vision will be designed and realized based on your budget from high quality to standard products. You can trust Cosmo Builders to design and build your major ground-up construction, remodels, and renovations to your specifications.
Permit Service
Every city and county have its own rules that govern building and construction law. Cosmo Builders offers guidance regarding compliance with building codes and works closely with architects to ensure we are submitting the right documents and applications for all building permits. The Cosmo Builders Building Permit Service lets you start construction in the shortest possible time. Cosmo Builders Building Permit Service will get everything ready for you and ready for pick-up as soon as you select a general contractor. We can pull permits for remodeling, additions, renovations, and new construction. We pull all sets of permits, including building, electric, plumbing, HVAC, and more. We also provide a site survey for all residential and commercial construction in Northern Virginia.
Special Building and Construction Warranty
Businesses and other organizations usually renovate their commercial buildings much more frequently than residences, but you still want to know that your project will be completed in a way that will hold up until you’re ready for that next expansion or upgrade. At Cosmo Builders, we build your commercial building or remodeling to last. That’s why we warranty all of our work for up to one full year. If you encounter any issues with our work – whether it be flooring, framing, electrical, or any other service we provide in the course of your project – we will fix it promptly. Our Special Commercial Building Warranty covers all parts, tools, materials, and labor to correct the issue. It gives you the confidence and peace of mind to allow us to manage all aspects of your project while you focus on your business or organization. When you hire Cosmo Commercial Builders for a commercial construction project or commercial renovation in Northern Virginia, you can rest assured that you are receiving top notch, error-free services.
Residential/Commercial Construction & Remodeling
Cosmo Builders provides full-service residential and commercial construction and remodeling services in Arlington and Fairfax County. Click each page to learn more about these commercial and residential contracting services:
- GENERAL CONTRACTING
call us today 703-835-1831A general contractor oversees your entire construction project, from start to finish. Any subcontractors, vendors, supplies, or building materials are handled by our capable commercial general contractors in Arlington. We also file all necessary permits, obtain licenses, and provide insurance for your commercial construction site.
- CONSTRUCTION MANAGEMENT
call us today 703-835-1831Even if you have already handled planning, design, and permits, our experienced construction managers will remain onsite to make sure that your construction or renovation project in Arlington is performed to top industry standards.
- COMMERCIAL CONTRACTOR SERVICE
call us today 703-835-1831Sometimes it makes more financial sense to renovate or expand your existing commercial location in Northern Virginia. We can design your renovation to create a commercial, retail, food service, or office space that will meet your needs. Then, we make that plan come to fruition with top notch commercial renovating services.
- REMODELING AND ADDITION
call us today 703-835-1831
Cosmo Builders is also a residential contractor near you. We love helping solo entrepreneurs, freelancers, and other individual professionals create the perfect home office space. We also handle office remodeling, bathroom remodeling, kitchen remodeling, and more to make your commercial or residential space work for you.
- Pulling Construction Permits
call us today 703-835-1831Every city and county have its own rules that govern building and construction law. Cosmo Builders offers guidance regarding compliance with building codes and works closely with architects to ensure we are submitting the right documents and applications for all building permits. The Cosmo Builders Building Permit Service lets you start construction in the shortest possible time.
Residential/Commercial Construction & Remodeling
Cosmo Builders provides full-service residential and commercial construction and remodeling services in Arlington and Fairfax County. Click each page to learn more about these commercial and residential contracting services:
A general contractor oversees your entire construction project, from start to finish. Any subcontractors, vendors, supplies, or building materials are handled by our capable commercial general contractors in Arlington. We also file all necessary permits, obtain licenses, and provide insurance for your commercial construction site.
Even if you have already handled planning, design, and permits, our experienced construction managers will remain onsite to make sure that your construction or renovation project in Arlington is performed to top industry standards.
Sometimes it makes more financial sense to renovate or expand your existing commercial location in Northern Virginia. We can design your renovation to create a commercial, retail, food service, or office space that will meet your needs. Then, we make that plan come to fruition with top notch commercial renovating services.
Cosmo Builders is also a residential contractor near you. We love helping solo entrepreneurs, freelancers, and other individual professionals create the perfect home office space. We also handle office remodeling, bathroom remodeling, kitchen remodeling, and more to make your commercial or residential space work for you.
Every city and county have its own rules that govern building and construction law. Cosmo Builders offers guidance regarding compliance with building codes and works closely with architects to ensure we are submitting the right documents and applications for all building permits. The Cosmo Builders Building Permit Service lets you start construction in the shortest possible time.
Our Process
It’s easy to start a new construction or commercial renovation with us. Our process is simple and straight-forward as we take care of everything. You can rest easy and focus on your business while we take care of all the details of your construction or remodeling project in Northern Virginia.
We meet with you to understand every detail of what you want, determine the project scope and what your budget will allow us for materials and finishing products. A prospective budget for the project is prepared and reviewed with you.
Our team conducts an on-site “Q&A” session with subcontractors and suppliers. We coordinate our proprietary bid and proposal submissions for competitive pricing on your project.
With your input, we will help find your project the right architect who can produce construction documents for your project. By detailing the drawings, we prevent costly delays and unexpected surprises for you down the road.
Permits are a headache that you don’t have time for. Now you can have your permit applications underway, for construction or remodeling projects, through Cosmo Builders Permit Service representative.
A meeting takes place in our show room, or in your designer’s show room, where you view different options of products and finishing materials. You get to fully customize your project.
Timeline estimates are entered into our project scheduling tool. We know how long the project will take and can predict and avoid potential points of delay. Being on time is always our #1 priority.
We use sophisticated project management software to create a custom schedule for your project. We are able to pinpoint at any given moment what is happening on your project, and what will happen next.
Contact us today to get started with an estimate for complete construction services for your residential or commercial remodeling or new construction.
Specialty Construction
Cosmo Builders provides clients with the highest standards of workmanship, service, and support in the construction industry. We are versatile contractors and able to handle every service you need in the course of your residential or commercial construction or remodeling project in Arlington.
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Areas we serve
Cosmo Builders is a locally owned and operated commercial construction contractor operating in Northern Virginia. We believe in supporting our local community and economy, sourcing all materials, tools, and equipment locally when possible. We love partnering with other local small businesses to lift each other up and promote shopping local, whether it is for products or services.
We serve both private and public sectors throughout Fairfax County and Arlington County. These counties, and our service area, include these Northern Virginia cities and suburbs:
Have you been recommended to us but aren’t located in one of these towns? We might still be able to help if you’re nearby. Contact us today to discuss your location. If you are indeed outside of our service area, we may be able to offer local recommendations.
Cosmo Builder Awesome Fact
19 Years Work
Experience in Project Management And Construction
96 Project completed
We have successfully delivered over 96 Commercial Project
6 ongoing Project
We are working on 6 projects now
500 satisfied clients
Satisfied Clients