Bathroom Addition
Add a new powder room or full bath with plumbing and fixtures coordinated. Bergen Restoration plans and builds bathroom additions across Bergen County.
New Bathroom Builds
Adding a bathroom means coordinating plumbing, electrical, ventilation, and finishes in a space that may not have had them before. We handle every phase — from running supply lines and waste pipes to setting tile and fixtures.
- Supply & waste line installation
- Ventilation & exhaust systems
- Tile floors, walls & shower surrounds
- Vanity, toilet & fixture installation
- Lighting & electrical circuits
- Waterproofing & moisture management
Plan Your New Bathroom With Confidence
Adding a bathroom, planned around plumbing, layout, and permits.
Addition vs Conversion Cost
Adding a bathroom to an existing home in Bergen County runs $20,000 (converting a closet or small room) to $80,000+ (full addition requiring structural work and exterior walls) for 2026.
- Converting a closet or pantry: $20,000–$35,000 for a half bath; $28,000–$45,000 for three-quarter.
- Full bath conversion: $35,000–$60,000 in existing interior space.
- Basement bathroom (with ejector pump): $22,000–$45,000 depending on plumbing complexity.
- Addition to the house footprint: $55,000–$100,000+ for a new primary-adjacent bath.
- Second-floor master bath: $45,000–$85,000 if plumbing stack is nearby.
- Key cost driver: distance from existing plumbing stack; every 10 ft adds $1,500–$3,500.
Planning a project like this? Get an estimate.
Where to Put the New Bath
The right location for a new bathroom depends on plumbing access, structural feasibility, daily flow, and resale logic.
- Basement bath: most common; may need ejector pump if below main sewer line.
- Second-floor primary: adds significant resale value; needs plumbing stack access.
- Under-stair half bath: space-efficient; needs 30"x60" minimum clear floor.
- Mudroom half bath: useful for families; often near garage entry.
- Converted closet or pantry: smallest scope; requires plumbing rough-in.
- Garage / outbuilding: less common; heating + plumbing require extensive work.
Planning a project like this? Get an estimate.
Plumbing Rough-In
Every new bathroom needs proper plumbing: water supply, waste drain, vent stack, and typically a fixture trap. Cost scales with distance from existing stack.
- Water supply lines (hot + cold): PEX or copper run from existing lines; $800–$2,500 typical.
- Waste drain: 3" or 4" PVC run to existing main; $1,500–$4,500 depending on distance.
- Vent stack: required on every drain; ties into existing vent or new roof penetration $1,200–$3,000.
- Ejector pump (basement below sewer): $1,800–$4,500 with sealed pit and discharge.
- Toilet, sink, shower rough-in: $2,000–$4,000 labor for full bath rough-in.
- Water heater capacity: check existing sizing; may need upgrade for new bath.
Planning a project like this? Get an estimate.
Small Bathroom Design
A well-designed small bathroom can be more functional than a poorly-designed large one. Layout discipline matters more than total square footage.
- Powder room (half bath) minimum: 3'x6' with toilet + sink.
- Three-quarter bath: 5'x7' with toilet + sink + shower.
- Full bath (with tub): 5'x8' with tub-shower combo.
- Fixture sizing: compact toilet (19" depth) saves floor space vs standard 24"+.
- Wall-mount sink: frees floor; feels larger than pedestal or vanity.
- Corner shower: 36"x36" minimum; 42"x42" preferred.
- Pocket door: saves 10 sq ft of swing space; useful in tight baths.
Planning a project like this? Get an estimate.
Addition Timeline
Bathroom additions take 3–8 weeks on-site plus 2–6 weeks for permits and any design/engineering before construction starts.
- Closet conversion bath: 3–4 weeks on-site.
- Basement bath (with ejector): 4–6 weeks.
- Second-floor addition bath: 5–7 weeks.
- Addition to footprint: 8–12 weeks including foundation/shell work.
- Permit turnaround: 1–4 weeks in Bergen County.
- Fixture + tile lead times: in-stock 1–2 weeks; specialty 4–12 weeks.
Planning a project like this? Get an estimate.
Permits & Inspections
Bathroom additions trigger multiple permits in New Jersey. Plumbing and electrical are always; structural and zoning come into play for additions to the house footprint.
- Building permit: $200–$700 based on project value.
- Plumbing permit: $150–$400.
- Electrical permit: $100–$300.
- Zoning review: required for additions to building footprint; may trigger variance.
- Structural permit: for second-floor bath additions with joist modifications.
- Total typical permit cost: $500–$1,800 for interior bathroom additions.
Planning a project like this? Get an estimate.
Pricing and timelines are planning ranges. Final cost and schedule depend on site conditions, access, structural requirements, materials, permit review, inspections, weather, material lead times, and scheduling availability.
Frequently Asked Questions
Most commonly: basement (with ejector pump if needed), second floor (primary or hall), converted closet or pantry, under-stair (half bath), or addition to the footprint. Feasibility depends on plumbing stack access and structural capacity.
Half bath (toilet + sink): 3'x6'. Three-quarter bath (toilet + sink + shower): 5'x7'. Full bath with tub: 5'x8'. Smaller rooms need compact fixtures and creative layout.
Bergen Restoration provides written workmanship warranty terms with every contract. Manufacturer warranty coverage depends on the selected product, installation requirements, and manufacturer terms. Coverage is reviewed before you sign. If something isn't right within the warranty window, we come back and fix it.
Every project uses a milestone payment schedule tied to agreed phases — set out in writing in your contract. Homeowners who want to finance work typically use third-party home-improvement lenders; we're happy to share the names of lenders other clients have used. Any financing arrangement is between the homeowner and the lender.
For most Bergen County residential projects, 3 to 8 weeks from contract signing to on-site start. Summer and early fall fill fastest. Most planned residential projects are scheduled in advance. We confirm scope, materials, trade coordination, and timing before work begins.
Yes. Dust control, daily cleanup, and protecting the rest of the home are part of how we run a job.
If the basement floor is below the main sewer line (common in older Bergen County homes), yes. An ejector pump + sealed pit adds $1,800–$4,500 to the plumbing rough-in.
The closer the better. Every 10 ft of distance from the existing stack adds $1,500–$3,500 in plumbing work. Layouts following the stack are significantly cheaper.
Yes. Galvanized water lines, cast-iron drains, and older panels are common. We flag upgrades needed during consultation and include them in the estimate.
All 70 Bergen County municipalities. Residential only.
Yes. Bergen Restoration is a registered New Jersey Home Improvement Contractor (NJHIC# 13VH08865500) with commercial general liability and workers’ compensation coverage; documentation available on request.
Your Bathroom Addition Process
Consultation
We visit your home, review scope and priorities, measure, and align on materials and timeline.
Design & selections
We finalize materials, finishes, schedule, and a written scope so the project starts with clear expectations.
Build
Crew executes the build with organized scheduling, regular check-ins, daily cleanup, and trade coordination.
Walkthrough
Final walkthrough together, punch-list closeout, warranty registration, and project sign-off.
Get Your Estimate
Reach us by phone or email and tell us about your bathroom addition project. We will follow up with the next best step for your home.
Commercial general liability and workers’ compensation coverage. Documentation available on request.
Let's Talk About Your Project
Tell us what you have in mind — we'll follow up with a plan.