Basement Finishing Hauppauge NY

Hauppauge Basement Contractor — LI Basement Pro

Basement Finishing Hauppauge NY

Basement finishing and waterproofing in Hauppauge, NY. We serve the ranch and colonial homes throughout Hauppauge's established residential neighborhoods.

4.9 — 187 Reviews
🏠580+ Basements Completed
Licensed & Insured
🏆BSI Certified

Mon–Sat, 7am–5pm · Free Estimate · No Obligation

Free Estimate — No Obligation

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Or call directly: (631) 625-8649 · Free Estimate · No Obligation

4.9 Stars — 187 Google Reviews·🏠580+ Basements Completed·📅15 Years on Long Island·Licensed & Insured·🏆BSI Certified Dealer·🌿EPA Lead-Safe Certified·🔨NARI Member·👥14-Person Crew·🔒Nassau & Suffolk Licensed·4.9 Stars — 187 Google Reviews·🏠580+ Basements Completed·📅15 Years on Long Island·Licensed & Insured·🏆BSI Certified Dealer·🌿EPA Lead-Safe Certified·🔨NARI Member·👥14-Person Crew·🔒Nassau & Suffolk Licensed·

Hauppauge, NY

Basement Finishing & Waterproofing in Hauppauge, NY

Basement finishing in Hauppauge NY by LI Basement Pro

Hauppauge's mix of 1960s–1990s ranch and colonial homes gives us a wide variety of basement projects. The community's location in central Suffolk County near the LIE means its residents value efficient, well-organized contractors who respect their time — that's always been our approach.

Hauppauge basements range from 600–1,100 sq ft depending on the home style. Ranch homes tend to have the fullest basements since the entire first floor footprint is available. Colonial homes with finished rooms above may have partial basements or lower ceiling heights in some sections.

We've handled several emergency flooding calls in Hauppauge — the area experienced significant storm impacts in recent years. Our response to these emergencies led to many waterproofing and finishing projects, as homeowners took the opportunity to properly waterproof before finishing.

Building permits for Hauppauge go through the Town of Smithtown Building Department. We work with Smithtown regularly and know their review process and typical timelines.

Services in Hauppauge

Nearby Towns We Also Serve

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We visit Hauppauge homes for free, no-obligation estimates. Mon–Sat, 7am–5pm.

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✓ Nassau County Licensed

✓ 4.9 Stars · 187 Google Reviews

✓ Free estimate · No obligation

✓ Permits handled for you

Verified Local Work

Recent Basement Jobs Near Hauppauge

Real jobs completed by our crew across Nassau and Suffolk Counties.

Sump Pump Installation in Hauppauge, NY
Sump Pump Installation
Hauppauge, NYFeb 2026

Battery backup sump pump system after basement flooding

Basement Finishing in Hauppauge, NY
🏠 Basement Finishing
Hauppauge, NYOct 2025

Open-plan basement with kitchenette, home office nook, and storage wall

Basement Finishing in Hicksville, NY
🏠 Basement Finishing
Hicksville, NYMar 2026

650 sq ft basement with LVP flooring, recessed lighting, and egress window

Basement Waterproofing in Levittown, NY
💧 Basement Waterproofing
Levittown, NYMar 2026

Interior drainage system + dual sump pump installation on cape-style home

Basement Finishing in Commack, NY
🏠 Basement Finishing
Commack, NYFeb 2026

800 sq ft basement with home office, bathroom rough-in, and drop ceiling

Egress Window Installation in Garden City, NY
🪟 Egress Window Installation
Garden City, NYFeb 2026

Two egress windows with full excavation and waterproofed window wells

Basement Finishing in Mineola, NY
🏠 Basement Finishing
Mineola, NYFeb 2026

550 sq ft playroom/guest suite conversion with full drywall and LVP

Basement Waterproofing in Smithtown, NY
💧 Basement Waterproofing
Smithtown, NYJan 2026

Exterior waterproofing membrane + interior french drain system

Got Questions?

Basement Finishing FAQs — Hauppauge, NY

Basement finishing in Hauppauge follows Long Island pricing: $50–$85 per square foot installed. A typical 600 sq ft basement runs $30,000–$51,000 finished. Suffolk County permit costs add $500–$1,500 to the project. We provide free, no-obligation estimates for all Hauppauge homeowners.

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Mon–Sat, 7am–5pm · Free Estimates · No Obligation · Licensed & Insured