Basement Renovation · NYC
Basement Renovation in the Bronx & Westchester
Turn a damp, unused basement into your favorite room in the house — waterproofed, permitted, and finished by one licensed team. Most Bronx and Westchester basements run $25,000–$125,000 with fixed line-item pricing.
30+ years
Finishing basements across the Bronx & Westchester
$2M insured
Fully licensed general contractor
7-year warranty
Written workmanship & waterproofing coverage
$25k–$75k
Typical all-in finished basement range
What's included
Every basement project starts with moisture control and ends with finishes that feel like the rest of your home.
- Interior & exterior waterproofing with lifetime membranes
- Egress windows and bedrooms that meet the NYC Building Code
- Framing, insulation, drywall, and moisture-resistant flooring
- Home theaters, gyms, guest suites, and in-law apartments
- Wet bars, kitchenettes, and full basement bathrooms
- Sump pumps, dehumidification, and radon mitigation
Popular basement builds
Home theater & lounge
Sound-treated walls, projector wiring, tiered seating, and wet-bar rough-ins.
Guest suite or in-law apartment
Egress bedroom, full bath, and kitchenette — configured for legal accessory dwelling use.
Home gym & wellness room
Impact flooring, ventilation, mirror walls, and dedicated electrical for equipment and sauna.
Kids' playroom & family room
Warm LVP flooring, built-in storage, and layered LED lighting the whole family enjoys.
How we work
Site assessment
We inspect moisture, ceiling height, egress, and utilities to design a plan that meets the NYC Construction Codes enforced by the Department of Buildings.
Fixed-price quote
Detailed scope with materials, finishes, and a firm timeline — approved before demo begins.
Build & warranty
Waterproofing systems and workmanship covered by a 7-year written warranty.
Basement renovation FAQ
How much does a basement renovation cost in NYC?
Full basement renovations in NYC and the tri-state typically range from $25,000 for a simple rec room to $50,000 for a full guest suite with bath, kitchenette, and waterproofing.
Do I need a permit to finish my basement?
In most cases yes. NYC requires DOB permits for framing, electrical, plumbing, and any egress or bedroom conversion. We handle every filing.
My basement gets water. Can it still be finished?
Almost always. We start with interior/exterior waterproofing, sump systems, and vapor barriers before any framing. That work is warrantied.
How long does a basement remodel take?
Most basement renovations take 6–12 weeks depending on waterproofing scope, bathroom additions, and finish level.
What is the cost per square foot to finish a basement in NYC?
Expect roughly $40–$60 per square foot for a straightforward finished basement, and $65–$90 per square foot once you add a full bathroom, kitchenette or extensive waterproofing. A 700 sq ft rec room typically lands between $28,000 and $42,000.
What ceiling height do I need for a legal finished basement?
NYC generally requires at least 7 feet of finished ceiling height for habitable basement space, plus compliant egress and light and ventilation. We measure and confirm feasibility during the free assessment before any design work begins.
Can you add a bathroom to a basement below the sewer line?
Yes. Where gravity drainage is not available we install an ejector pump or an above-floor macerating system, both permitted and inspected. This typically adds $5,000–$9,000 to the project.
Is the waterproofing covered by your warranty?
Yes. Waterproofing systems and all workmanship are covered by the same 7-year written warranty, and the sump and drainage components carry manufacturer coverage on top of that.
What factors have the biggest impact on my basement price?
Moisture control, whether you add a bathroom, and ceiling height. A dry basement finished as a rec room sits near $25,000; add waterproofing, an egress window and a full bath and you approach $50,000.
What does a $25,000 basement include?
Framing, insulation, drywall, moisture-resistant flooring, recessed lighting, outlets, painting and a finished stair — for a dry basement that needs no structural or waterproofing work.
What pushes a basement to $50,000?
Full interior waterproofing with a sump system, an egress window cut into foundation, a full bathroom with ejector pump, a kitchenette, and HVAC extension or a mini-split for the new space.
Are permits and inspections included in the price?
Yes. DOB filing, plan work and inspection coordination are part of every quote where permits are required, so there are no surprise filing fees mid-project.
Does finishing a basement add value to my home?
It typically returns a large share of the spend and, more importantly, adds usable square footage. Legal, permitted work with proper egress is what appraisers and buyers actually credit — unpermitted finishing often counts for nothing.
Request your free basement quote
Tell us about your basement. We'll call within one business day to schedule your free in-home consultation.
Ready to finish your basement?
Moisture control first, then framing, egress and finishes. Licensed, $2M insured, 7-year warranty.
Call (917) 705-4571Get a free estimate in 30 seconds
Name, phone, and what you need — we call you back within one business day.
Prefer to talk? (917) 705-4571
Official NYC sources
Requirements on this page follow the NYC Construction Codes. These are the official City references — we file and pull the permits for you.
- NYC Construction Codes
The Building, Plumbing, Mechanical, Fuel Gas and Energy Conservation codes that apply to work in all five boroughs.
- DOB — Permits & homeowner guidance
When a permit is required and what a homeowner should verify before work starts.
- NYC Department of Buildings
Official agency that reviews plans, issues permits and performs inspections.
Pricing
Basement Renovation cost ranges
Typical 2026 ranges for NYC-area projects. Every job gets a fixed-price proposal in writing after a site walkthrough.
Basic finished basement or recreation room
$25,000 – $35,000
Framing, insulation, drywall, flooring, lighting and paint in a dry basement.
Standard finished basement
$35,000 – $50,000
Adds upgraded finishes, built-ins, dedicated circuits and code-compliant egress.
Basement with bathroom, kitchenette or waterproofing
$50,000 – $75,000
Full moisture-control systems plus a bath or wet-bar build-out.
Luxury basement suite or legal living-space conversion
$75,000 – $125,000+
Guest suite or accessory apartment with full bath, kitchenette, egress and separate systems.
Common add-ons
- Basement bathroom additionAdd $15,000 – $35,000
- Waterproofing or moisture repairAdd $8,000 – $30,000+
- Egress window installationAdd $5,000 – $15,000
- Laundry room additionAdd $10,000 – $25,000
Explore more of our work
What a kitchen renovation really costs in the Bronx and Westchester.
Drywall InstallationFraming, hanging and Level 5 finishing.
Painting ServicesInterior painting for finished basements.
General Contractor BronxPermits, structure and full build-outs.
Bronx Home RenovationWhole-home renovation in the Bronx.
Renovation PricingIndicative budgets by scope.
Book a ConsultationFree 45-minute in-home visit.