Do I need a permit for cesspool removal in Suffolk County?

If the old structure is coming out as part of putting a new system in, yes, and the approval comes before the work. Article 6 of the Suffolk County Sanitary Code says that after July 1, 2019, no property owner, contractor or developer shall engage in an OWTS Replacement or an OWTS Retrofit of an existing cesspool or individual sewerage system for any permanent structure unless Department approval is obtained for the proposed work. The Code excludes parcels located within a proposed sewer district as approved by the Commissioner. Article 6 defines OWTS Replacement as the abandonment and/or removal of an existing individual sewerage system or cesspool and installation of a new individual sewerage system, so the removal sits inside the approval, not beside it. Source: Article 6, sections 760-603 definition 32 and 760-605.B.1, read in full 2026-08-21.

Does an old cesspool or septic tank have to be dug out, or can it be filled?

Article 6 does not answer that, and this page will not invent an answer. Read in full on 2026-08-21, the word abandonment appears once in the whole Article and the word removal appears once, both inside the same definition of OWTS Replacement, which names the two routes and does not choose between them or describe how either is carried out. The method is set by the Department's own construction standards and by the approved design for your property, so that question goes to the Suffolk County Department of Health Services Division of Environmental Quality at (631) 852-5800, and to the installer preparing your plan.

Is cesspool removal a separate contractor from the new system?

Usually not. Article 6 treats the removal and the new installation as one thing, an OWTS Replacement, filed on one approval. The same county-approved installer who designs and builds the new treatment system handles the old structure on that approval. What is worth checking is endorsements: the county's licensing form lists pumping under endorsement 1 and system installation under endorsements 9 and 10, and one company does not automatically hold all of them.

Is the cost of removal covered by the septic grant?

The closeout is generally folded into the overall conversion project the grant is applied against, rather than billed on its own. The Suffolk County Septic Improvement Program and the New York State Septic System Replacement Program may each offer help toward that conversion. We do not publish amounts because they change. Read the current terms and what counts as an eligible cost on the county septic grants page at suffolkcountyny.gov/septicgrants.

Suffolk County Cesspool Removal and Abandonment

Cesspool removal in Suffolk County is not a standalone job in the county’s own rules. Article 6 of the Sanitary Code folds it into a defined project called an OWTS Replacement, which means “the abandonment and/or removal of an existing Individual Sewerage System or Cesspool and installation of a new Individual Sewerage System”. Two things gate it: county approval before the work starts, and a contractor holding an active Liquid Waste License.

The work goes to an independent, licensed installer, so the old-structure closeout and your new system are handled together on one approval.

What cesspool removal means in Suffolk County’s code

The county does not use the phrase most homeowners type. Nothing in Article 6 is called cesspool removal. The work sits inside one of two defined projects, and which one you are in decides your paperwork.

Article 6 defines a Cesspool as “any buried chamber, including, but not limited to any perforated metal tank, perforated concrete or block vault or hollow excavation, which receives direct discharges of wastewater from a building sewer for the purpose of collecting solids and discharging liquid to the surrounding soil”. A cesspool is a defined term of its own, separate from an Individual Sewerage System, which the Code defines as “any onsite sanitary system consisting of a septic tank and/or I/A OWTS tank(s) with any associated interconnecting piping, a leaching structure(s) and any associated interconnecting piping”.

Getting rid of one falls under either of two defined projects, and which one you are in decides the paperwork:

The Code’s term	What Article 6 says it is	What it looks like on your property
OWTS Replacement (definition 32)	“the abandonment and/or removal of an existing Individual Sewerage System or Cesspool and installation of a new Individual Sewerage System”	The old cesspool goes, a septic system or I/A OWTS goes in
OWTS Retrofit (definition 33)	“the modification or alteration of an existing Cesspool or Individual Sewerage System”	Part of the system is replaced or added to, including new leaching structures

Read definition 32 closely, because it is doing real work. It is a single project with three elements: abandonment and/or removal of the old, plus installation of the new. It is not a definition of removal on its own. Article 6 also attaches a limit to it: “Applications for OWTS Replacement shall not propose any change of use, new Construction Project, Other Construction Project, or change the amount of Sewage discharged from a permanent structure.” Adding bedrooms is a different application.

Source: Article 6 of the Suffolk County Sanitary Code, section 760-603, definitions 2, 20, 32 and 33, read in full 2026-08-21. Article 6 was adopted 1980-11-19 and last amended 2020-12-01.

Do you need a permit for cesspool removal?

If a new system is going in, yes, and the approval comes first. Section 760-605.B.1 reads: “After July 1, 2019: no Property Owner, contractor, or Developer shall engage in an OWTS Replacement or an OWTS Retrofit of an existing Cesspool or Individual Sewerage System for any permanent structure unless Department approval is obtained for the proposed OWTS Retrofit or OWTS Replacement of the Individual Sewerage System. This requirement shall exclude parcels located within a proposed sewer district as approved by the Commissioner in accordance with Department standards.”

Three things in that sentence are worth carrying:

The obligation lands on you as well as the contractor. The Code names the property owner first, then the contractor and the developer. This is not only a trade rule.
There is one stated exclusion, parcels inside a proposed sewer district approved by the Commissioner. Whether yours is one is a question for the county, not for a web page.
Approval is obtained for the proposed work, which means before, not after.

There is a separate reporting duty that runs in the background. After July 1, 2018, a Liquid Waste license holder has to report all OWTS Replacements and OWTS Retrofits to the Department, and all pumping of septic tanks, I/A OWTS, cesspools, grease traps and leaching structures, in accordance with standards the Department establishes (sections 760-605.A.1 and 760-605.A.2). Your job becomes part of the county record.

Article 6 does carry a route for cases that do not fit, a variance and waiver decided by the Commissioner under section 760-612. The Division of Environmental Quality’s Board of Review hears variance and waiver requests on the third Thursday of every month, except December when it meets on the second Thursday. Verified 2026-08-21 on the county’s Division of Environmental Quality page, which lists the division at 360 Yaphank Avenue, Suite 2B, Yaphank, New York 11980, telephone (631) 852-5800.

Who is licensed for cesspool removal in Suffolk County

A contractor holding an active Suffolk County Liquid Waste License, and the license is issued with endorsements rather than as one blanket permission. This is the check almost nobody publishes, and it is the one you can run yourself.

Section 760-605.C.1 says no contractor or developer shall “engage in the OWTS Replacement of a Cesspool or Individual Sewerage System with a new Individual Sewage System for any permanent structure unless said contractor or Developer holds an active Liquid Waste License pursuant to Suffolk County Code Chapter 563, Article VII (Septic Industry Businesses) through the Suffolk County Department of Labor, Licensing and Consumer Affairs”. Section 760-605.C.2 applies the same requirement to a retrofit.

That license is not one undivided permission. The county’s own Liquid Waste licensing form sets out endorsements under Chapter 563, Article VII, and a business checks off the ones it is applying for. The endorsements that touch a removal job:

Endorsement 1, Septic Tank Pumping, Cleaning, and Maintenance. The emptying step. The form requires proof of ownership of a dedicated pump or vacuum truck for sanitary or organic waste, plus either LILWA certification or the NAWT Vacuum Truck Technician class.
Endorsement 5, Waste Line Cleaning and Inspection. Relevant when the problem turns out to be the line rather than the pit. Requires dedicated jetting or waste line cleaning equipment plus LILWA certification.
Endorsement 9, Conventional Septic System Installation. The new system, if it is a conventional septic.
Endorsement 10, Innovative and Alternative Treatment System Installer. The form says this requires Endorsement 9 first, plus the Suffolk County Department of Health Services and University of Rhode Island Innovative and Alternative Onsite Wastewater Treatment Technology class (OWT105), and it adds a note that an installer must hold an installation training certificate from the manufacturer of every specific technology being installed.

Two details from that form make the check something you can run standing in your own driveway. First, “Endorsements 1, 2, 3, 4, 6, & 7 require a dedicated vehicle displaying the LW license # and dedicated use on the truck”, so a license number belongs on the truck that pumps. Second, endorsements are priced separately: “One (1) endorsement is included in your $400.00 licensing fee. Each additional endorsement carries an additional $200.00 fee.” A company holds the endorsements it chose to pay for, which is exactly why the useful question is which endorsements does your license carry, not are you licensed.

One honesty note about that form. Read in full on 2026-08-21, its visible list runs 1 through 7 and then 9, 10 and 11, with no endorsement 8 shown, and the form states no total. It also carries no revision date on its face. Confirm the current endorsement list and a company’s standing with the Suffolk County Department of Labor, Licensing and Consumer Affairs rather than relying on a copy of a form. Grant-funded work runs through a separate county list, covered in our approved installer guide.

Should an old cesspool or septic tank be removed or left in place?

Here is where this page stops short of what other pages will tell you, on purpose.

Article 6 does not answer it. Read in full on 2026-08-21, the word “abandonment” appears exactly once in the entire Article and the word “removal” appears exactly once, both inside definition 32. The Article names abandonment and removal as the two routes and says nothing about which applies to your property, nothing about pumping the structure first, and nothing about filling a void. The words “fill”, “backfill” and “clean sand” do not appear in it at all. Anyone telling you the Sanitary Code requires a specific closeout method is not reading the Article they are citing.

What decides it instead is the Department’s construction standards and the approved design for your parcel, and that is the pair we could not read this session. The Suffolk County residential standards document was not retrievable from the county’s site on 2026-08-21 (the published link returned a 404), so no method claim is made here from memory. Take the question to the Division of Environmental Quality at (631) 852-5800 and to the installer preparing your plan.

What is not in dispute is the physical problem. An old cesspool is a hollow pit, often a ring of concrete or block, that has held wastewater for decades. Once it is out of service and unmaintained, walls and covers weaken, and a void under a yard, a driveway or a parking area is a hazard whatever the paperwork says. That is a reason to have the closeout designed rather than improvised, and it is the reason the question belongs with the engineer and the county rather than with a search result.

What cesspool removal costs, and why no figure is published here

No dollar range appears on this page, and that is a position rather than a gap. The honest answer is that the closeout is a line inside a larger project, and the project is priced on your site.

Removal cost moves with the type and depth of the old structure, soil and access, how far equipment has to travel across the property, and how the rest of the conversion is scoped. Two homes on the same street price differently for what is underground. A number we cannot name a source and a date for is worth less to you than a written quote from someone who has stood on the site.

What we can do is show you the drivers so you can read a quote and judge it. The Suffolk septic replacement cost guide walks through every one of them, and because the removal sits inside the OWTS Replacement rather than beside it, the closeout is a line in that project rather than a separate invoice to budget for.

The money question that actually moves is the grant. Suffolk County’s Septic Improvement Program may offer help toward replacing a cesspool or older septic with an approved I/A OWTS, and the New York State Septic System Replacement Program may offer more on top.

We do not publish program amounts. Award levels, percentages, deadlines and eligibility rules are set by Suffolk County and New York State and change over time, so the agencies' own pages are the current source: the county Septic Improvement Program and its septic grants page, and the New York State Septic System Replacement Fund. Check them before you budget. No one can promise you a grant; the county decides awards.

Our Suffolk septic grant guide explains how the county and state programs fit together and how to apply.

Buying or selling a home with an abandoned cesspool

An old structure in the ground turns into a transaction question sooner or later.

Two things from above carry directly into a sale. The removal and the new system are one approved project in the county’s eyes, so a partially done job is a file with something missing in it. And the license holder’s reporting duty under section 760-605.A means the county record of a property’s system builds from the work that was reported on it.

If a sale is what is driving your timing, our guide on selling a Suffolk home with a cesspool covers what buyers, lenders and inspectors actually look at, and the septic inspection at sale page covers the inspection itself. If the old system is failing rather than simply old, the septic repair page carries the county’s six failed-system conditions.

Handled as part of the conversion, not a separate hunt

You do not need one company for the old cesspool and another for the new system. Article 6 treats them as one project, so they are filed and built as one.

The county-approved installer who designs and installs your new treatment system handles the old one on the same approval, as part of the same project. Our cesspool to septic conversion page walks through the full pathway, and if your existing system is a failing conventional septic rather than a cesspool, septic system replacement covers it. For grant-funded work the county wants a nitrogen-reducing I/A OWTS, which treats wastewater down toward the county’s 19 mg/L nitrogen standard before it reaches groundwater. The Peconic Estuary Partnership explains why upgrading an old septic system matters for the bays that make this county what it is.

How it works

Your request goes in front of one independent, county-approved installer. No fee to you, no obligation.

You tell us your town, what your current system is, and what is pushing the timing, whether that is a failing cesspool, a home sale, or an addition that adds bedrooms. An independent, county-approved installer who works your area can handle both the new system and the old-structure closeout together. You get a real evaluation and quote, and you decide whether to move forward. There is no fee to you and no obligation. We are paid a referral fee by the installer, which never raises your price.

Taking an old cesspool out of service the right way is not glamorous, and in Suffolk County it is not a job you file separately from the system that replaces it. If you are ready to close out the old structure and put in something that protects local water, someone who does this work across Suffolk County can take it on. Serving Huntington, Islip, Brookhaven, and towns countywide.

What it costs, and what happens after you send it

What does this work cost in Suffolk County?: A pump-out, a service call, a repair or an inspection prices per visit, and the number tracks things a company has to see: how deep the pit is, how much is sitting in it, whether a truck can reach it, and whether the visit turns up a structural problem rather than routine solids. We do not publish a dollar range for it. A Suffolk County figure we cannot name a source and a date for is worth less to you than a written quote, and an invented one would be worse than none. The replacement cost guide walks through every driver so you can read a quote and tell whether it is fair, and the approved installer who visits the property is the only honest source of your number. Program help is a separate question. The county Septic Improvement Program and the New York State Septic System Replacement Program may each offset part of an approved system, and we do not publish their amounts, because the agencies set them and change them.
How fast will someone get back to me?: Your request goes to an independent installer on Suffolk County’s approved-installer list, usually within about an hour during the day. That installer then contacts you to look at the property and price the work on their own schedule.
What work is covered?: Cesspool to septic conversion, I/A OWTS installation, septic system installation and replacement, septic repair, cesspool service and pumping, septic tank abandonment, and septic inspection at sale. See every service.

Only the installer who walks your property can price the job.

Cesspool Removal and Septic Tank Abandonment in Suffolk County