Updated May 2026
Basement Apartment / In-Law Suite · Iselin, NJ
Convert an underused basement into a permitted, comfortable apartment or in-law suite tailored to Iselin layouts. We focus on code, usable layouts, and durable finishes.
We remodel basements into self-contained living units: sleeping area, kitchenette, full bathroom, egress, and storage. Work starts with a site review for ceiling height, waterproofing needs, existing mechanicals, and required Middlesex County permit scope.
Our work
FAQ
Costs vary by scope: a basic suite with bathroom and kitchenette typically starts from a mid-range budget once waterproofing, egress, and permit work are included. We provide a line-item estimate after the site walkthrough so you can compare options and trades.
Typical timelines run 8–14 weeks from permit approval depending on the extent of structural work, inspections, and finishes. We give a scheduled timeline with critical milestones on the estimate.
Yes. Most basement apartments and in-law suites require local permits and code inspections for egress, electrical, plumbing, and mechanical alterations. We prepare permit submissions and coordinate inspections as part of the project.
Many homeowners stay in the house. Expect intermittent noise, dust containment areas, and phased work to keep main living spaces usable. We plan access, dust control, and work hours with you before starting.
Schedule a site walkthrough: we measure the basement, review code constraints, discuss layout priorities, and provide a written estimate and project timeline after the visit.
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 Iselin home, walk the space, take measurements, and put a written scope together on-site. About 45-60 minutes.
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Iselin, 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 Iselin 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 Iselin, NJ.
Nearby towns
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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.
