Residential · Basements

Basement Remodeling & Finishing in New Jersey

Turn an unused lower level into a family room, home gym, guest suite or rental-ready apartment.

We start with what most people skip — moisture, drainage, plumbing and electrical — then frame, insulate and finish the space so it feels like the rest of your home.

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NJ HIC Reg. #13VH13917100 · Registered & insured

Finished basement with recessed lighting and luxury vinyl plank flooring

4–8 wks

Typical full finishing on site

$15k+

Starting total, incl. materials

Egress

Bedrooms planned to code

Why choose Dong Sheng

Moisture handled first

We evaluate water risk and include waterproofing and drainage work before any finishes go in.

Code-compliant egress

Bedrooms and living areas are planned to meet New Jersey egress, ventilation and life-safety requirements.

Every square foot planned

Soffits, mechanicals and support columns are worked into a layout that feels open and intentional.

What’s included

  • Full basement finishing and remodeling
  • Home theaters, bars and game rooms
  • Extra bedrooms and in-law suites
  • Basement bathrooms
  • Waterproofing, drainage and underground plumbing
  • Electrical panels, lighting and mechanical room upgrades

How your project runs

  1. Consultation & site visit

    We visit, measure, look at existing conditions and talk through goals, budget and timing.

  2. Design & written scope

    We check moisture, ceiling height and mechanicals, then deliver a custom layout, a written labor quote and a material list.

  3. Permits & build

    We file permits, then handle drainage, framing, rough-ins, inspections, insulation, drywall and finishes with regular updates.

  4. Final walkthrough

    We review every detail with you and close out the punch list before handover.

Real photos and videos from our job sites. Open one to enlarge it, then swipe or use the arrows to browse the rest.

Finished basement with recessed lighting and luxury vinyl plank flooring
Finished basement walkthrough video
Finished basement with drywall soffits, recessed lights and new doors
Basement with new vinyl plank flooring and recessed lights, final stage
Unfinished basement with concrete floor before remodeling
Basement framing walkthrough video
Finished basement living area during final trim work
Basement framing and electrical rough-in before drywall
Basement walls insulated, with new ductwork overhead
Basement insulation and ductwork video
Crew hanging drywall in a basement with a painted open ceiling
Drywall going up around a steel support column in a basement
Basement drywall stage video
Basement excavation for new underground plumbing lines
Newly installed gas water heater in a basement mechanical room
Mechanical room with new boilers and water heaters
Row of new water heaters with copper piping
Basement cleanout and preparation video
Trench with new PVC drain lines during a plumbing upgrade
New electrical panel and wiring video
Electrical panel wiring video

Budget & timeline reference

Basement refresh

Total (incl. materials) $15k – $35k

Timeline 2 – 4 weeks

Full basement finishing

Total (incl. materials) $35k – $70k

Timeline 4 – 8 weeks

Premium basement suite

Total (incl. materials) $70k+

Timeline 8 – 12 weeks

Ranges are total project budgets (labor + materials) for planning. Dong Sheng charges for labor only: you buy flooring, drywall, doors, lighting and other materials directly at actual cost, with no markup from us. Final cost depends on waterproofing scope, mechanical upgrades and finish level. Registered & insured New Jersey home improvement contractor · NJ HIC Reg. #13VH13917100

Frequently asked questions

Yes. We evaluate water risks and include waterproofing and drainage work before finishing.

Yes, when code requirements for egress, ventilation and life-safety are met. We will tell you during the site visit what your basement needs.

A full finishing project typically takes 4–8 weeks on site, depending on plumbing, egress and finish level.

Yes. For basement projects we charge for labor only. You buy flooring, drywall, doors, lighting and fixtures directly at actual cost, with no markup from us. We give you a material list with specs and quantities, help you choose, and check and install everything once it arrives on site.

Yes. Permit and inspection coordination is included in our project management.

Where we work

  • Bergen County
  • Essex County
  • Passaic County
  • Middlesex County
  • Mercer County

Related services

Thinking about finishing your basement?

Share your goals and we will return a practical scope, code checklist and timeline.

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