DRAINAGE SOLUTIONS IN SUFFOLK COUNTY
Drainage Solutions in Suffolk County, Fix the Water Problem Before It Destroys Your Pavement.
Catch basin installation and repair, trench drains, stormwater management, drainage correction, foundation drainage, and storm drain construction for commercial, municipal, and residential properties across Suffolk County and Nassau County.
4.6/5 Google Rating
· BBB A+ Since 2012
· Licensed in Suffolk & Nassau County
BBB A+ Accredited
Since 2012
Dan's Best of the Best
2025 Winner
Suffolk County Licensed
Contractor License
Nassau County Licensed
Contractor License
Fully Insured
General Liability + Workers Comp
THE REAL COST OF POOR DRAINAGE
Standing Water on Your Parking Lot Isn't Just an Eyesore, It's Breaking Down Your Pavement From Below
Site grading is the work that happens before anything else — and the work that determines whether everything built above it performs correctly or fails within a season.
Puddles that sit for hours after a rainstorm aren't a minor nuisance. They're water working its way under your asphalt, weakening the base layer, and setting up a pavement failure that will cost far more to fix than the drainage problem ever would have. Water damage is one of the top reasons commercial pavement fails early on Long Island — and it's almost entirely preventable.
We handle drainage problems across Suffolk County and Nassau County before they turn into full repaving jobs. Our own crews and equipment handle the grading, the drain installation, and the final surface work — no subcontractors, no coordination gaps between multiple crews. One call, one team, start to finish.
Suffolk County soil varies significantly from town to town. In areas like Brentwood and Central Islip, clay-heavy soil holds water near the surface instead of letting it drain. That trapped water works its way under your asphalt and weakens the base layer from below — regardless of how new or well-built the surface above it is. The fix isn't just adding a drain. You need proper grading too, so water moves away from the pavement entirely rather than pooling somewhere new.
We see this regularly at older commercial properties across Long Island where the lot drains toward the building instead of away from it. That's not just a pavement problem — it's a foundation problem waiting to happen. Getting drainage right the first time protects your paving investment, your foundation, and your property for years.
OUR DRAINAGE SERVICES
Seven Drainage Services, One Contractor on Long Island
From catch basin repair to full stormwater management systems — all self-performed with our own crews and equipment across Suffolk and Nassau County.
Catch Basin Installation & Repair
Catch basin installation, cleaning, and repair to keep drainage functioning and prevent water from undermining pavement on commercial and municipal properties.
Drainage Correction & Regrading
Surface regrading to correct drainage that runs toward buildings or pools in low spots — the most common drainage problem on older commercial properties across Long Island.
Stormwater Management
Stormwater management system design and installation for commercial, municipal, and development properties — managing high-volume runoff before it damages pavement or structures.
Storm Drain & Sewer Construction
Storm drain and sewer line construction for commercial and municipal sites — coordinated with site grading and paving for complete site drainage solutions.
Foundation Drainage
Foundation drainage installation to redirect water away from building foundations — preventing basement water intrusion and foundation damage on commercial and residential properties.
Concrete Drainage
Concrete drainage structures, drainage channels, and concrete-lined drainage systems for commercial, municipal, and industrial properties across Long Island.
WHICH SOLUTION IS RIGHT FOR YOUR PROPERTY?
Three Common Drainage Problems, and How We Fix Them
Most drainage problems on Long Island fall into one of three categories. Here's what causes each one and what the fix looks like.
Water collecting in the same spots after every rain means the surface grade is directing water the wrong way — or the surface has settled and created low points. Fix: regrading to correct pitch combined with catch basin or trench drain installation at the collection point. Common at commercial lots in Hauppauge and Commack where older pavement has settled over time.
Water Moving Toward the Building
A lot that drains toward the building instead of away from it is one of the most common problems we see at older commercial properties across Long Island. It's a foundation problem as much as a pavement problem. Fix: full surface regrade to reverse the drainage direction, combined with foundation drainage installation where the building is at risk.
Base Failure from Water Infiltration
When water gets under the asphalt and saturates the subbase, the pavement above it fails from below — you see it as cracking, soft spots, and potholes that keep coming back. Fix: drainage correction to stop the water source, base repair, and repaving. In clay-heavy areas like Brentwood and Central Islip, this is the most common cause of premature pavement failure.
Commercial & Municipal Drainage on Long Island — Why It's Different From Residential Work
Commercial and municipal drainage systems handle significantly higher water volumes than residential applications — and they're subject to different code requirements. A commercial parking lot in Hauppauge handles more surface runoff per square foot than a residential driveway, and that runoff needs to go somewhere specific — not just off to the side of the lot.
Stormwater management for commercial and municipal properties on Long Island is increasingly regulated. Properties that discharge runoff incorrectly can face compliance issues with Suffolk County and Nassau County stormwater regulations. We design drainage systems that manage high-volume runoff correctly — protecting your pavement, your foundation, and your compliance position.
Storm drain and sewer construction for commercial development projects is also part of our scope — coordinated with site grading and paving so the full drainage system is designed as one integrated solution, not three separate contractors handing off to each other.
WHY FIORINI PAVING
The Drainage Contractor Long Island Properties Trust
35+
Years on Long Island
Drainage work across Long Island since the late 1980s. We know exactly what Suffolk County clay soil does to drainage systems, what coastal properties near the South Shore need, and why older commercial lots drain toward buildings instead of away from them.
580+
Properties Graded & Resloped
580-plus drainage projects completed across Long Island — catch basin installation and repair, trench drain systems, stormwater management, foundation drainage correction, and surface regrading for commercial, municipal, and residential properties.
1,500+
Properties Served Across Long Island
From commercial parking lots and industrial facilities to HOA communities and substantial residential properties — 1,500-plus Long Island properties served with our own crews and our own equipment since the late 1980s.
WHAT OUR CLIENTS SAY
4.6 out of 5 Google Reviews
Based on 10 Google reviews · Verified through Google Business Profile
Nick Russo
President, O'Keefe Court Condominium Board
2024
Fiorini Paving did an excellent job repaving the parking lot at our condo facility. As president of the board, I was involved in reviewing multiple proposals, and Fiorini impressed us with their professionalism, responsiveness, and attention to detail from start to finish. The quality of the work was top notch, and they followed up after completion to ensure everything was holding up well. We're very satisfied with the results and would highly recommend Fiorini Paving for any paving or asphalt work.
Verified Google Review
Valerie McDermott
Car Dealership, Long Island, NY
September 2021
Verified Google Review
We are a car dealership, it is a huge challenge to navigate a paving project with all the vehicles on site. Not for these guys. ABSOLUTELY A++. They were excellent at communicating exactly what needed to be done in order for the entire project to go smoothly. The parking lot looks amazing and our drain issues solved!
Matthew Vitiello
Long Island, NY
March 2021
The guys at Fiorini Paving really did a phenomenal job for us. Not only did the quality of work exceed our expectations but they were also very easy to work with throughout the whole process. I highly recommend them.
Verified Google Review
AE Ealy
Local Guide · Long Island, NY
2024
Verified Google Review
Great price. They did a very good job. The crew was very professional. Everyone was respectful. They quoted a price, gave a deadline date to complete the job and came through. Highly recommend them.
COMMON QUESTIONS
Site Grading Questions, Straight Answers
Yes — we cover all of Suffolk County and Nassau County using our own crews and equipment. No subcontractors. Whether you're in Brentwood, Hauppauge, Commack, or anywhere else on Long Island, we come to you. We'll give you a straight timeline when you call at (631) 643-2443.
Standing water after rain usually means your surface isn't graded correctly or your drainage system can't handle the volume. Water needs a clear path away from your pavement. Without it, it sits on the surface and works into the base layer below. We assess the grade, identify where the water is coming from, and install the right drain — catch basin, trench drain, or channel drain — so water moves off your property instead of sitting on it.
Clay-heavy soil in those areas holds water near the surface instead of letting it drain. That trapped water gets under your asphalt and weakens the base from below — it's one of the most common causes of premature pavement failure in central Suffolk County. The fix isn't just adding a drain — you need proper grading too, so water moves away from the pavement entirely.
Channel drains and trench drains work well for large commercial lots because they move high volumes of water fast across a wide surface area. Catch basins are effective at collecting runoff at specific low points. For older commercial lots that drain toward the building, regrading the entire surface is typically required in addition to drain installation. We assess your specific lot before recommending anything.
Yes — water damage is one of the top reasons pavement fails early on Long Island. When water sits on or under your asphalt, it breaks down the base layer progressively. Every Long Island winter makes it worse — water freezes under the surface, expands, and breaks the pavement apart from below. Getting drainage right protects your paving investment for years and is significantly cheaper than a full repaving job.
Yes — foundation drainage installation to redirect water away from building foundations is part of our drainage scope. Commercial properties where the lot drains toward the building face both a pavement problem and a foundation risk. We correct the surface grade and install foundation drainage where the building is at risk — addressing both problems under one project.
Yes — stormwater management system design and installation for commercial and municipal properties is part of our work. This includes managing high-volume runoff correctly for properties subject to Suffolk County and Nassau County stormwater regulations. We also handle storm drain and sewer construction for commercial development projects — coordinated with site grading and paving as an integrated solution.
READY TO GET STARTED?
Get a Free Site Grading Estimate in Suffolk County
Call us directly or submit an estimate request and we'll get back to you within one business day. We serve commercial, municipal, and residential properties across Suffolk County and Nassau County — excavation, grading, road paving, sewer construction, and site prep all under one contract.
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