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Sewer & Water Pros

NYC's Trusted Experts

Sewer Extension Brooklyn

Licensed sewer extension specialists serving all 75 Brooklyn neighborhoods. New construction, additions, ADUs, and property expansions.

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Licensed Master Plumber $2M Insured 4.9/5 Rating (487+ Reviews) 24/7 Emergency Service All 5 NYC Boroughs
Last Updated: February 1, 2026Reviewed by Licensed NYC Master PlumberFact-Checked

Brooklyn Sewer Extension Experts

Sewer & Water Pros is Brooklyn's premier sewer extension contractor. Whether you are building a new addition, converting a basement, adding an accessory dwelling unit (ADU), or developing a new property, we handle the complete sewer extension process — from DEP permit applications to final inspection. Our team has completed hundreds of sewer extensions across Brooklyn neighborhoods including Park Slope, Williamsburg, Bay Ridge, Flatbush, Bushwick, and Bedford-Stuyvesant.

Brooklyn Sewer Extension Requirements

Brooklyn sewer extensions require NYC DEP approval, DOT street opening permits, and compliance with NYC Plumbing Code. The process involves connecting new sewer laterals to the existing city sewer main in the street. Brooklyn's aging infrastructure — with many combined sewer systems dating back to the early 1900s — requires experienced contractors who understand the unique challenges of each neighborhood. Our licensed team handles all permitting, excavation, pipe installation, backfill, and street restoration.

Types of Brooklyn Sewer Extensions We Handle

We perform all types of sewer extensions in Brooklyn: new construction sewer connections, building addition sewer extensions, ADU and basement conversion sewer hookups, multi-family property sewer upgrades, commercial property sewer extensions, and storm sewer extensions. Each project includes a free site survey, detailed cost estimate, full DEP and DOT permitting, professional installation, and final city inspection coordination.

Frequently Asked Questions

How much does a sewer extension cost in Brooklyn?
Sewer extension costs in Brooklyn typically range from $8,000-$20,000 depending on the distance to the city main, depth of the existing sewer, street conditions, and complexity. We provide free detailed estimates.
Do I need a permit for a sewer extension in Brooklyn?
Yes. All sewer extensions in Brooklyn require a NYC DEP sewer connection permit and a DOT street opening permit. We handle all permitting as part of our service.
How long does a sewer extension take in Brooklyn?
Most Brooklyn sewer extensions take 3-7 days from start to finish, depending on the scope. Permit processing typically takes 2-4 weeks before work can begin.
Can you extend a sewer line for a new ADU in Brooklyn?
Yes! We specialize in sewer extensions for ADUs and basement conversions in Brooklyn. We handle the complete process including DEP approval, excavation, pipe installation, and inspection.

About the Author

Sewer & Water Pros Editorial Team

Licensed NYC Sewer & Water Main Contractors

Our content is written and reviewed by licensed NYC master plumbers who specialize exclusively in sewer line replacement and water main replacement. With over 20 years and 5,000+ sewer and water main jobs completed across all five boroughs, we know NYC's underground pipe infrastructure inside and out. Every article is fact-checked against current NYC DEP regulations.

20+ Years

Experience

5,000+

Projects Done

5

Boroughs Served

Credentials & Certifications

NYC Licensed Master Plumber (LMP)
NYC DEP Certified Contractor
OSHA 30-Hour Safety Certified
Insured & Bonded — $2M Liability Coverage
Member: NYC Master Plumbers Council
Member: National Association of Sewer Service Companies (NASSCO)

NYC Licensed Plumber

Master Plumber License #XXXX

DEP Sewer & Water Certified

Approved for All Sewer & Water Main Work

BBB A+ Rated

Sewer & Water Main Specialist

24/7 Sewer & Water Emergency

60-Minute Response Time

4.9/5 Rating

487 Verified Reviews

Ready to Get Started?

Contact Sewer & Water Pros today for a free estimate. We serve all five NYC boroughs with licensed, insured, and DEP-certified sewer and water main services.

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