Residential · The5thwall

Basement Finishing

Unlock Your Home's Hidden Square Footage

Overview

Turn your unfinished basement into usable living space — home offices, gyms, entertainment rooms, guest suites, or rental units.

We handle the unique challenges of below-grade construction in NJ, including waterproofing, egress windows, proper ventilation, and NJ code compliance.

From basic 1,000 sq ft build-outs starting at $30,000 to full entertainment suites with bathrooms and wet bars, we manage every phase of the project.

Scope of work

Every basements project covers the full scope — start to finish.

One contractor pulls every trade under one roof — design, demolition, rough-in, finish, cleanup. You deal with the owners. No coordinating subs, no finger-pointing, no surprise line items.

Included

Interior drainage systems, sump pumps, and waterproofing membranes
Egress window installation with well excavation (NJ building code required)
Full framing, spray foam or rigid foam insulation, and drywall
Bathroom addition with sewage ejector pump and full plumbing
Wet bar and kitchenette rough-in with plumbing and electrical
Custom lighting design optimized for low-ceiling spaces
HVAC extension or mini-split climate control systems
Soundproofing between floors and home theater wiring
Built-in storage, shelving, and entertainment center framing

Investment

What a basements project costs.

Three investment tiers, based on scope and finish level. Every estimate is custom — these are the ranges most clients land within.

Essential

Quality craftsmanship for everyday upgrades

$15K - $40K

What's included

Single-room renovations
Standard material selections
Licensed & insured crew
Project management included
1-year workmanship warranty
Permit handling

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Premium

Elevated finishes for the modern home

$40K - $100K

What's included

Multi-room renovations
Premium material selections
3D design visualization
Dedicated project manager
2-year workmanship warranty
Permit handling
Weekly progress updates
Flexible payment schedule

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Elite

Full-scale transformations without compromise

$100K+

What's included

Whole-home renovations
Designer-grade materials
Full architectural planning
Senior project manager
5-year workmanship warranty
Permit handling
Daily progress updates
Priority scheduling
Post-project walkthrough

Schedule a Consultation

The process

Five steps, start to handover.

Consultation

A site visit, measurements, and an honest conversation about scope. No pressure, no obligation.

Design & estimate

We return with a detailed plan, material selections, and an itemized estimate. You see exactly what the project is — and exactly what it costs.

Contract & permits

One contract, line-itemed. We pull every permit required by NJ code. Your project starts with compliance handled.

Build

Our crew works on site, one point of contact throughout. Daily cleanup, weekly progress reports, no crew rotation.

Handover

A walkthrough of every detail together. Nothing closes until you're satisfied. Workmanship warranty begins the day you sign off.

Before & after

A recent basements project.

Drag the slider to see the transformation — same footprint, rebuilt from the studs.

Basement finishing — before and after. Drag to compare.

Questions answered

Basements — frequently asked.

Basement finishing in Central NJ typically costs $30-$75 per square foot, depending on the scope. A basic 1,000 sq ft build-out starts around $30,000, while a full entertainment suite with a bathroom can reach $75,000+. We include waterproofing in every quote.

Yes — NJ building code requires egress windows in finished basements used as living space, particularly bedrooms. We install code-compliant egress windows as part of our basement finishing service.

Service area