Adding a bathroom is one of the most valuable improvements you can make to a home, especially in Northern Virginia, where many older homes have fewer bathrooms than today’s buyers expect. It is also a bigger project than a remodel, because you are starting from bare framing: new plumbing, wiring, ventilation, walls, and permits.
Here is what it costs to build a bathroom in Northern Virginia, based on 20 new bathrooms we have built across Fairfax, Loudoun, Prince William, and Arlington.
The cost to build a bathroom, by type
| New bathroom | Typical range in our recent projects |
|---|---|
| Half bath (toilet and sink) | $15,000 – $25,000 |
| Full bath with tub and shower | $35,000 – $55,000 |
| Primary bath with double vanity and separate shower | $55,000 – $90,000 |
Across our last 10 new bathrooms in Fairfax County, the average cost to build a full bathroom was $44,000. Projects in Arlington and Alexandria tended to run higher, mostly because older homes need more work to bring plumbing and electrical up to current code.
What makes up the cost
For a typical new full bath, here is roughly how the budget breaks down in our projects:
- Plumbing (new supply lines, drains, vents, and fixtures): 25 to 30%
- Framing, sheetrock, and waterproofing: 15 to 20%
- Tile and flooring: 15 to 20%
- Electrical, lighting, and ventilation: 10%
- Vanity, countertop, and fixtures: 15 to 20%
- Permits, design, and inspections: 5%
What drives the price up or down
Distance from existing plumbing
This is the single biggest factor. A new bathroom directly above or beside an existing one can tie into nearby drain and vent lines. One on the far side of the house may need long new runs through finished ceilings, which adds cost for both plumbing and drywall repair.
Where the bathroom goes
Converting a large closet or part of a bedroom is usually the most affordable option. Attic bathrooms need extra framing and often a new floor structure. Basement bathrooms have their own challenges, which we cover in how to build a bathroom in a basement.
Finishes
The same layout can vary widely in price depending on the tile, vanity, and fixtures you choose. We usually price two or three finish levels so you can see the difference.
Permits for a new bathroom
Building a new bathroom in Northern Virginia almost always needs permits for building, plumbing, and electrical work. Each county runs its own permit office. In our recent projects, permits in Fairfax County took 2 to 4 weeks, and Loudoun and Prince William took 1 to 3 weeks. We handle the drawings, applications, and inspections.
The cheapest place to add a bathroom is almost always the one closest to the plumbing you already have.
How long it takes
Most of our new bathrooms take 4 to 8 weeks from the start of construction, plus time for permits beforehand. Your proposal includes a schedule so you know what to expect.
Plan your new bathroom
See our new bathroom construction page for everything we handle, from plumbing to sheetrock installation, or contact us for a free at-home consultation and a written proposal.