Updated June 2026
Basement Apartment / In-Law Suite · Mountainside, NJ
Add a private living space for family or rental income. We handle the full interior build-out.
Mountainside homeowners often need extra space for aging parents, adult children, or rental income. A basement apartment / in-law suite adds a self-contained living area without changing your home's footprint. We focus on the interior work: framing, drywall, flooring, kitchenette, bathroom, and egress compliance.
Our work
FAQ
Timelines vary based on scope and permitting. A typical in-law suite takes 8–12 weeks. We'll give you a realistic schedule during the initial consultation.
Cost depends on size, layout complexity, finishes, and whether you need a full kitchen and bathroom. We provide detailed estimates after reviewing your space and goals.
Yes, most basement apartments require permits for egress, electrical, plumbing, and structural changes. We handle the permit process as part of our service.
Yes, we work in phases to minimize disruption. The basement area will be sealed off, and we keep the rest of your home accessible.
Schedule a free on-site walkthrough. We'll assess your basement, discuss your needs, and provide a project estimate.
Real basement apartment / in-law suite projects in New Jersey homes — same room, before we started and after we finished. Move the handle.
Drag the handleSwipe the handle or use ←→ to compare before and after.
Edison basement recreation room with game zones
Edison, NJ
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 Apartment / In-Law Suite 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.
