Updated May 2026
Basement Bathroom Addition · Mountainside, NJ
Interior-only basement bathroom additions in Mountainside tailored to space, egress, and plumbing layout. We handle design, permits, and finished carpentry.
We add full bathrooms in finished basements: showers or tubs, ADA options, ventilation, waterproofing, subflooring, and built-in storage. Work stays interior-focused and includes rough plumbing hookups routed to existing stacks when possible.
Our work
FAQ
Costs vary by size, fixtures, and plumbing complexity; small half-baths start lower while full baths with showers and tile cost more. We provide a written estimate after a walkthrough to assess stack access, drains, and finishes.
Typical timelines range 3–6 weeks for a standard full bathroom after permits are issued. Timelines change with permit wait, inspection scheduling, and finish selections.
You can occupy unaffected areas, but expect noise, dust, and restricted access near the work zone. We set up dust barriers and a protected path; large demo or plumbing days will be the most disruptive.
Request a consultation and on-site walkthrough. We measure, document plumbing/electrical conditions, and deliver a written estimate with options and a proposed schedule.
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Reviews
“I highly recommend Home Concept Construction. This was truly the best construction company I’ve ever worked with in my lifetime. Their team was professional, reliable, and incredibly efficient from start to finish. They are men of their word—honest, hardworking, and committed to delivering quality results. Whether i…”
monique venable
6 months ago
“Oscar and his team are expert craftsmen. Our kitchen renovation is so beautiful the house looks like a new build. They came when said they would and returned all calls promptly. I highly recommend Home Concepts construction and will be using them again for other projects.”
Donna G
a year ago
“Oscar and his team are second to none. Their work is of high quality, with precision. The team renovated our kitchen and family room, installed engineered hardwood floors throughout our home, painted plus some. They are extremely professional, flexible and accommodating. Oscar is a creative thinker and designed g…”
Audrey Sudran
a year ago
Verified reviews from Home Concepts Construction’s Google Business Profile. Read all reviews on Google →
Schedule
Pick a day and time that works for you. We come to your Mountainside home, walk the space, take measurements, and put a written scope together on-site. About 45-60 minutes.
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Mountainside, NJ
Free in-home walkthrough. Written scope before you commit. One team from demolition to final inspection.
Get a free quote
Tell us a little about the project and we'll get back within one business day with real answers about how it would go in a Mountainside home.
Free in-home visit
We come to you. Measure, plan, and quote on-site.
Licensed in NJ
NJ HIC #13VH10078600
Real response
Within one business day.
See more from Basement Bathroom Addition or learn about remodeling in Mountainside, NJ.
Nearby towns
Same crew, same standards one town over. Tap to see how the project would go there.
Ready to start?
No pressure, no obligation. We’ll walk through what’s worth doing first, what can wait, and what to watch out for — before anyone talks contracts.
