Suffolk County's Basement Contractor — Since 2011
Basement Finishing Suffolk County
LI Basement Pro serves western Suffolk County — Commack, Hauppauge, Smithtown, Dix Hills, and more. Licensed Suffolk County contractor with 200+ Suffolk basements completed.
Mon–Sat, 7am–5pm · Free Estimate · No Obligation
Free Estimate — No Obligation
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Responds within a few hours · Mon–Sat 7am–5pm
Suffolk County Basement Experts
Basement Finishing & Waterproofing Across Western Suffolk County
Western Suffolk County's housing stock is slightly different from Nassau — you'll find more ranch-style homes with larger footprints in Commack and Dix Hills, older cape-styles in Deer Park and Brentwood, and significant commercial-to-residential conversions in Hauppauge. We've worked in all of these communities since 2011.
Suffolk County's building departments — primarily the town-level departments (Huntington, Islip, Smithtown, Babylon) rather than a single county office — have slightly different requirements. Our office manager Karen is familiar with all of them and handles permit applications for each town's specific process.
Towns We Serve in Suffolk County
Verified Local Work
Recent Jobs in Suffolk County
Real jobs completed by our crew across Nassau and Suffolk Counties.
800 sq ft basement with home office, bathroom rough-in, and drop ceiling
Storm-related basement flooding — emergency pump-out and drying service
650 sq ft basement with LVP flooring, recessed lighting, and egress window
Interior drainage system + dual sump pump installation on cape-style home
Two egress windows with full excavation and waterproofed window wells
Battery backup sump pump system after basement flooding
550 sq ft playroom/guest suite conversion with full drywall and LVP
Exterior waterproofing membrane + interior french drain system
Got Questions?
Suffolk County Basement FAQs
Yes. Suffolk County requires building permits for basement finishing. The specific permit authority depends on your town — Smithtown, Islip, and Huntington all have their own building departments with slightly different requirements and fee schedules. We handle permit applications for all Suffolk County towns we serve.
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