What Bathroom Remodeling Services Does Cosmo Builders Offer?
Cosmo Builders provides the full spectrum of bathroom remodeling, renovation, and addition services for homeowners throughout Northern Virginia. From updating a single bathroom to building an entirely new one, every project is delivered with the same standard of craftsmanship, attention to detail, and transparent communication from the first consultation to the final walkthrough.
Master Bathroom Renovations & Luxury Upgrades
Your master bathroom should be more than functional; it should feel like a retreat. For homeowners in McLean, Great Falls, and Vienna who have been living with a bathroom that feels dated, cramped, or poorly designed, a master bathroom renovation is one of the highest-value improvements you can make to your home.
Cosmo Builders designs and builds master bathrooms around how you actually live. That means understanding whether you want a spa-style soaking tub, a frameless walk-in shower with rainhead fixtures, a double vanity with custom storage solutions, or all of the above. We handle every element, floor plan redesign, plumbing and electrical upgrades, custom tile installation, lighting design, and full waterproofing- so the finished bathroom works exactly the way you envisioned it.
Master bathroom services we provide include:
- Custom walk-in showers with frameless glass enclosures and premium fixtures
- Freestanding soaking tubs and fully tiled tub surrounds
- Double vanities with custom cabinetry and built-in storage
- Tub-to-shower conversions that create a more functional daily space
- Heated flooring systems
- Premium tile installation and waterproofing throughout
- Lighting design and smart fixture integration
- Full plumbing and electrical upgrades
What this does for your home:
- Updated master bathrooms command premium prices in McLean, Arlington, and Fairfax County, making this one of the highest-return investments a Northern Virginia homeowner can make
- Your daily routine improves immediately when your bathroom finally functions the way you need it to
Every master bathroom project begins with a detailed design consultation, so you see exactly what you are getting before construction starts. If you are also considering updates to the rest of your home, explore our Whole Home Remodeling services.
Guest Bath, Hall Bath & Powder Room Remodeling
Not all bathroom renovations have to be a complete luxury overhaul. Guest bathrooms, hall bathrooms, and powder rooms each have their own particular roles in your home, and each one deserves a remodel tailored precisely to that role.
A guest bathroom renovation in a house in Arlington or Falls Church might focus on updated fixtures, new tile, a different vanity, and better lighting, changes that will make the space feel inviting without needing major structural work.
A hall bathroom shared by children benefits from durable materials, smart storage solutions, and a layout that handles morning traffic efficiently. A powder room remodel, even though it’s smaller in scope, is usually the most design-focused space in a home since it’s the first thing your guests will see.
Cosmo Builders approaches each bathroom type individually. The materials we suggest, the layout changes we propose, and the finishes we use are all determined by how that particular bathroom is actually used every single day. Nothing will be templated. Everything will be built around your home and your household.
Bathroom Additions & Expansions
Occasionally, the problem isn’t how the bathroom looks itself but rather that your house simply doesn’t have enough of them. For families in Springfield, Annandale, Centreville, and Burke growing in size, a bathroom addition can completely change how your household functions day to day.
A bathroom addition means building an entirely new bathroom in a space that did not previously have one. This could mean converting a large closet into a powder room, adding a full bathroom to an unfinished basement, or building a new master suite that includes a private bath. A bathroom expansion, by contrast, takes an existing bathroom and makes it physically larger by claiming square footage from an adjacent room or closet.
Both require structural changes and the necessary permits, and Cosmo Builders handles them all on your behalf. We coordinate with local authorities across Northern Virginia for every required approval, managing plumbing, electrical, framing, and finishing so you never have to track down separate trades or navigate permit offices yourself.
Planning to expand beyond the bathroom? Our Home Additions page covers everything from room additions to full-scale home expansions throughout Northern Virginia.
Accessibility Upgrades & ADA-Friendly Bathroom Features
A bathroom that works well for you today may not work as well in ten years. Age-in-place bathroom renovations are one of the most practical investments a homeowner can make – and one of the most thoughtful.
Cosmo Builders designs and installs ADA-compliant bathroom features for homeowners in McLean, Reston, Herndon, Ashburn, and throughout Northern Virginia who want their homes to remain safe and accessible as they get older. We also work with families who are adapting a bathroom to suit an elderly parent or a family member dealing with mobility challenges.
Accessibility upgrades we fit include:
- Step-free, curbless walk-in showers with built-in seating
- Grab bars and safety rails are placed exactly where they’re needed for your everyday use
- Non-slip tile and flooring throughout the bathroom
- Wider doorways for wheelchair and walker access
- Lever-style faucets and door hardware throughout
- Comfort-height toilets
- Better lighting in every part of the bathroom
Our aim is always a bathroom that’s safer and more accessible, but doesn’t have that clinical or institutional look. Each feature is seamlessly integrated into the overall design, creating a finished space that is extremely comfortable and built to last.
Our Bathroom Remodeling Process: From First Consultation to Final Walkthrough
Step 1: Free In-Home Consultation
When we come to your house, we’ll assess the current bathroom or the space where a new one will be installed, take measurements and really understand your goals. This will be a really hands-on conversation, totally focused on figuring out what your bathroom needs to become before we even think about anything else.
Step 2: Design and Material Selection
Before construction begins, you’ll receive a complete project plan outlining all layout changes, tile and fixture choices, plumbing and electrical work, and a detailed, itemized estimate. So you’ll know exactly what’s included and what to expect right before construction begins.
Step 3: Permits and Approvals
Bathroom remodeling projects in Fairfax County, Arlington County, the City of Alexandria, and Falls Church do require permits for plumbing, electrical and structural work. We’ll handle filing all permit applications, coordinate with local inspectors, and manage every approval on your behalf. So you won’t ever need to go to a county office or search for paperwork yourself.
Step 4: Construction and Trade Coordination
You’ll have a fully committed project manager overseeing your renovation right from demolition through to completion. They’ll coordinate all the different trades, including plumbers, electricians, carpenters, and tile installers, providing a single point of accountability throughout the whole project.
During construction, you’ll also be able to see your project details through your own project portal on the Cosmo Builders website. You can log in at any time to see progress photos, see the upcoming schedule, and talk directly with the project team. This real-time access really gives you transparency and lets you stay informed while you focus on your daily life.
Step 5: Final Inspection and Walkthrough
Before the project can be considered complete, Cosmo Builders will carry out an extremely detailed walkthrough to examine all fixtures, finishes, tiles and installations. Any remaining items are documented on a punch list and resolved promptly. Final approval won’t occur until the finished bathroom measures up to the standards agreed upon right from the start.
Once approved, the Cosmo Builders Bathroom Warranty becomes active, covering labor, materials and relevant components after project completion. If an issue does arise, our team is committed to putting things right without unnecessary delay or complications.
What Does a Bathroom Remodel Cost in Northern Virginia?
Bathroom remodeling costs in Northern Virginia vary based upon the size of the bathroom, the extent of the work, whether there are any structural changes or additions involved, and the quality of materials that you select. Here is a realistic breakdown by project type:
A powder room or guest bathroom refresh, which could include new fixtures, paint, vanity, lighting, and tile, will typically start Powder Room Refresh
$8,000 – $18,000 . This is one of the most precise types of bathroom renovations and usually won’t need any major structural changes beyond updating the electrical system.
A full master bathroom renovation, including a new walk-in shower, vanity, tile, plumbing upgrades, lighting redesign, and layout adjustments, typically ranges from [Master Bathroom Renovation
$25,000 – $48,000+ depending on the size of the space and the materials you choose.
A luxury master bathroom remodel with a freestanding soaking tub, frameless glass shower enclosure, heated flooring, custom cabinetry, and premium tile throughout can range from Luxury Bathroom Remodel
$30,000 – $50,000+ in the McLean, Arlington, and Great Falls markets.
A bathroom addition, building an entirely new bathroom in a space that did not previously have one, starts at Bathroom Addition
$25,000 – $47,000and increases based on scope, plumbing requirements, and the size of the new space.
Every quote from Cosmo Builders includes a detailed, line-item breakdown before work begins. There are no hidden fees and no cost surprises once construction starts.
Contact Cosmo Builders for a free in-home estimate. We’ll walk through your bathroom goals and give you an honest, itemized number before any work begins. Call 703-835-1831.
Recent bathroom remodeling projects carried out in Northern Virginia.
Every bathroom Cosmo Builders transforms is thoughtfully designed to meet the homeowner’s needs and the space’s specific opportunities and constraints. Below are three recent projects we completed for homeowners right across Northern Virginia.
Recent Bathroom Remodeling & Addition Projects Completed in Northern Virginia
At Cosmo Builders, we believe homeowners deserve more than promises—they deserve proven results. The following projects showcase our experience in bathroom remodeling, bathroom additions, bathroom expansions, design-build services, permitting, and construction throughout Northern Virginia.
Project 1:
Luxury Master Bathroom Remodeling
McLean, Virginia
Client: Yuge Ma
Project Type: Master Bathroom Renovation
Location: McLean, VA
Project Scope
- Complete Master Bathroom Renovation
- Walk-In Shower Construction
- Custom Tile Installation
- Frameless Glass Enclosure
- Freestanding Tub Installation
- Custom Vanity & Storage Solutions
- Plumbing & Electrical Upgrades
- Luxury Fixtures & Finishes
- Modern Lighting Design
This master bathroom renovation transformed an aging bathroom into a luxurious and highly functional retreat. The project included a complete redesign of the space, upgraded plumbing and electrical systems, custom tile work, modern fixtures, improved lighting, and premium finishes tailored to the homeowner’s lifestyle and design preferences.
The result is a sophisticated bathroom that combines comfort, functionality, and timeless design while enhancing the overall value of the property.
Project 2:
Luxury Bathroom Addition & Expansion
Arlington, Virginia
Client: Erik Grabowsky
Project Type: Bathroom Addition, Expansion & Design-Build Construction
Location: Arlington, VA
Project Scope
- New Bathroom Addition
- Bathroom Expansion & Layout Reconfiguration
- Design & Space Planning
- Permit Management & Approvals
- Structural Modifications
- Plumbing & Electrical Installation
- Custom Tile Installation
- Modern Fixtures & Finishes
- Final Inspections & Project Completion
This project involved the design and construction of a brand-new bathroom addition integrated into the existing home. The project included complete design-build services, permitting, structural modifications, plumbing, electrical work, custom finishes, and final inspections. The result was a spacious, modern bathroom designed to improve functionality, comfort, and long-term property value while blending seamlessly with the existing home.
Project 3:
Dual Bathroom Remodeling & Primary Suite Upgrade
Fairfax, Virginia
Client: Sara Tete
Project Type: Bathroom Remodeling & Primary Bathroom Renovation
Location: Fairfax, VA
Project Scope
- Two Bathroom Remodels
- Primary Bathroom Expansion
- Custom Walk-In Shower Installation
- Skylight Installation
- New Window Openings
- Custom Tile & Waterproofing
- Vanity & Fixture Upgrades
- Lighting & Ventilation Improvements
- Modern Contemporary Design Finishes
This project transformed two outdated bathrooms into modern, functional spaces designed for everyday comfort and long-term value. The primary bathroom was expanded to create a larger, more luxurious layout featuring improved natural lighting through new windows and skylights, premium finishes, upgraded fixtures, and a spacious walk-in shower.
The renovation significantly improved functionality, aesthetics, energy efficiency, and overall homeowner satisfaction while creating a true spa-like experience within the home.
Meet Your Builder
Mohib Alkozay | Founder,
Class A Licensed Contractor & Construction Professional
Your bathroom remodel deserves more than a contractor—it deserves an experienced construction professional you can trust.
Mohib Alkozay personally oversees Cosmo Builders projects throughout Northern Virginia and Washington, DC. With more than 20 years of construction experience, a background in Civil Engineering, and experience managing residential, commercial, and government construction projects, Mohib brings practical expertise, transparent communication, and accountability to every project.
Since founding Cosmo Builders, his team has successfully completed 50+ remodeling, home addition, kitchen, bathroom, basement, and residential construction projects throughout the region.
Why Homeowners Trust Mohib & Cosmo Builders
- 20+ Years Construction Experience
- Virginia Class A Licensed Contractor
- Washington, DC Licensed Contractor
- Civil Engineering Background
- 50+ Completed Local Projects
- Design-Build Expertise
- One Team • One Contract • One Point of Accountability
Learn More Before You Build
https://cosmobuilders.com/mohib-history/
https://cosmobuilders.com/permit-hoa-guide/
https://cosmobuilders.com/contractor-hiring-guide/
Our goal is simple: provide honest guidance, quality workmanship, and a stress-free remodeling experience from planning through final completion.
Why Choose Cosmo Builders for Your Bathroom Remodel?
| What Sets Us Apart | Details |
|---|---|
| Ranked among the top 1% of Virginia contractors | Cosmo Builders ranks in the top 1 percent of all 131,387 Virginia-licensed contractors on BuildZoom. We’ve got over 97 verified five-star reviews, more than 60 professional awards, and over 94+ completed construction projects spread across Northern Virginia and Washington, D. C. |
| Class A Licensed & Fully Insured | Each and every bathroom project is fully permitted, inspected, and compliant with Fairfax County, Arlington, Alexandria, Falls Church and Washington, DC building codes. Your house and investment are protected right from day one. |
| One Dedicated Team. Full Accountability. | A single project manager will be your point of contact from initial consultation to final walk-through. No juggling between different contractors. It’s one person who will know your project inside and out and accept complete responsibility for the end result. |
| Federal-Grade Quality Control | The same level of precision used in US Department of Defense construction projects is applied to every residential bathroom renovation in Northern Virginia – regardless of project size or budget. |
| Transparent Budgeting | Detailed, line-item estimates given before any work starts. Any changes to the budget are talked about and approved before they happen. There will be no surprises at any stage of construction. |
| Deep Local Knowledge | Cosmo Builders have extensive knowledge of the permit process, HOA requirements, and specific building codes for each Northern Virginia jurisdiction, saving you time, preventing costly delays, and stopping potential compliance problems before they arise. |
What Our Clients Say
“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.”
— Verified Angi Reviewer, Northern Virginia
F.A.Q. About Bathroom Remodeling in Northern Virginia
How long does a bathroom remodel take in Northern Virginia?
A cosmetic powder room refresh will take 1 to 2 weeks. A full master bathroom gut renovation typically takes 3 to 6 weeks, depending on the complexity. A new bathroom addition involving structural work and new utility runs will usually require 6 to 10 weeks. Cosmo Builders will provide a precise schedule before the work even starts so that you can plan around it.
Can I use my bathroom during a remodel?
Typically, you cannot use the bathroom while it is under active construction. Cosmo Builders sequences the work to minimize disruption, and if your home has only one bathroom, we’ll talk about a temporary plan right at the beginning of our initial consultation. For multi‑bathroom homes, the impact on your daily routine is minimal.
What permits are needed for a bathroom remodel in Fairfax County or Arlington?
You’ll need plumbing permits for any new or relocated pipes and fixtures; electrical permits cover things like new lighting, exhaust fans, and outlet changes; building permits are necessary when you’re moving walls or adding onto the square footage. Cosmo Builders will handle every single permit application and coordinate all the required inspections so that you don’t ever have to deal with the challenges yourself.
How much does a bathroom remodel cost in Northern Virginia?
Costs really depend on size, any necessary structural changes, your material choices, and whether the project is a cosmetic refresh or a complete gut renovation. Get in touch with us to get a no-cost in-home estimate that’s been carefully designed to meet your specific bathroom needs and your goals.
What is a tub-to-shower conversion, and is it worth it?
Converting a tub to a shower involves removing an existing bathtub and replacing it with a walk-in shower. This creates a more practical space, greatly improves accessibility, and gives your bathroom a much more modern appearance. This type of upgrade is super popular in Northern Virginia homes built in the 1980s and 1990s that already have a separate tub elsewhere. It basically adds a lot of value and makes an older bathroom look completely transformed and much newer.
What is the difference between a bathroom remodel and a bathroom addition, and can Cosmo Builders handle both?
A remodel changes the existing bathroom space, updating finishes, fixtures, and layout without changing the location of the bathroom itself. A bathroom addition creates a brand new bathroom in a space where none previously existed, which requires structural changes, new plumbing lines, and dedicated electrical circuits. Cosmo Builders handles both types of projects regularly across Northern Virginia, converting unused closets, finishing basement spaces, or building entirely new bathrooms as part of a larger home addition. Every project comes with full permit management and one dedicated project manager from start to finish.
Do luxury bathroom upgrades add resale value in Northern Virginia?
Yes. Master bathroom renovations consistently rank among the highest‑ROI home improvements in the Northern Virginia market. Buyers in Fairfax County, McLean, and Arlington specifically look for updated master bathrooms with walk‑in showers, dual vanities, and premium finishes when evaluating homes. Luxury upgrades help your property command a higher price.
What are ADA-compliant bathroom features, and will I need them?
ADA-compliant features comprise wider doorways, curbless showers, strategically placed grab bars, comfort-height toilets, and lever-style fixtures. These design choices aren’t simply for individuals with existing disabilities; they’re smart, forward‑thinking decisions for any homeowner contemplating aging in place within their Northern Virginia home, keeping you independent for a lot longer without sacrificing style.
Ready to Transform Your Bathroom?
One Trusted Contractor. One Clear Plan. One Beautiful Result.
Whether you’re planning a luxury master bathroom renovation, a guest bathroom update, a bathroom addition, or a walk-in shower conversion, Cosmo Builders provides expert guidance from concept to completion.
- Free In-Home Consultation
- Preliminary Budget & Investment Guidance
- Bathroom Design & Layout Recommendations
- Permit & Feasibility Review
- Plumbing, Tile & Fixture Expertise
- Class A Licensed Contractor
- 20+ Years of Construction Experience
Choose Your Consultation
One Team. One Contract. One Seamless Process.
Speak directly with an experienced design-build contractor about your project.
Choose Your Consultation Type
Book Free Consultation & Estimate
Let’s discuss your project and provide a personalized estimate — at no cost.
What Bathroom Project Are You Considering?
Why Homeowners Choose Cosmo Builders
- 20+ Years Construction Experience
- Class A Licensed & Insured
- 50+ Completed Local Projects
- Transparent Pricing & Communication
- Permit & Inspection Management
- One Team • One Point of Accountability
- Building Relationships Beyond Construction
Schedule Your Free Bathroom Consultation
📞 Call or Text: 703-835-1831
Let’s create a bathroom that’s more comfortable, more functional, and built to fit your lifestyle for years to come.
