Free · No Obligation · No Pressure
Get Your Free Basement Estimate
Join 580+ Long Island homeowners who started with a free estimate. We respond within hours.
Free Estimate — No Obligation
Request Your Free Basement Estimate
We'll respond within hours. Mon–Sat, 7am–5pm.
Simple Process
What Happens After You Submit
We'll Call Within Hours
Karen will call you back same day (Mon–Sat, 7am–5pm) to confirm your appointment and answer any initial questions.
In-Home Measurement
Dan or a senior estimator visits your home, measures the space, and discusses your goals. Usually takes 30–45 minutes.
Moisture Assessment
We check for any water intrusion or drainage issues that need addressing before finishing. This protects your investment.
Detailed Written Quote
You'll receive a complete written quote within 24–48 hours including all materials, labor, permits, and any waterproofing if needed.
No Pressure, No Obligation
We provide the estimate for free. If you get other quotes, that's fine — we stand behind our pricing and our quality.
Why LI Basement Pro
Long Island's Most Trusted Basement Contractor
580+ basements completed
More Long Island basements than any contractor you'll find
4.9 stars, 187 Google reviews
Consistent 5-star service across Nassau and Suffolk
15 years on Long Island
Dan Farrelly has been doing this since 2011
Full license & insurance
NY HIC, Nassau County HIC, BSI Certified, EPA Lead-Safe
We pull all permits
Karen handles Nassau and Suffolk County permit coordination
14-person in-house crew
No subcontractors — everyone on your job works for us
