What Actually Happens When You Cap a Gas Line for a Heat Pump Conversion in NYC?

When you cap a gas line for a heat pump conversion in NYC, the work splits across three separate trades and two city agencies, and each one must happen in the right order. First, a licensed master plumber (LMP) caps the appliance gas line and files the required DOB permit. Second, the boiler is formally decommissioned and self-certified using NYC DOB form OP49. Third, you contact Con Edison to close the gas account or remove the meter so the daily standing/delivery charge stops. Skipping any step leaves you with open permits, unresolved violations, or a gas bill that keeps arriving long after the boiler is gone.

This guide covers the full sequence for a Brooklyn or Manhattan brownstone owner making the switch to a heat pump system: who is legally authorized to do what, which permits get filed, what the OP49 form requires, and the specific steps to stop the recurring Con Edison gas charge.

First Decision: Are You Keeping Gas for the Stove or Going Fully Electric?

This decision changes everything downstream, which pipe gets capped, whether you keep the meter, and what you ultimately pay Con Edison. There are three scenarios most brownstone owners face.

• Partial electrification (heating only): You replace the boiler with a heat pump but keep the gas range and the gas line serving it. The LMP caps the branch serving the boiler, the meter stays, and you continue paying a monthly delivery/standing charge for cooking gas.
• Partial electrification (heating + water heating): You also replace the gas water heater with a heat pump water heater. The LMP caps both appliance branches. If the stove remains gas, the meter still stays.
• Full gas shutoff: All gas appliances are gone, boiler, water heater, and cooking range. The entire gas service is terminated, Con Edison removes the meter, and the daily delivery charge disappears. This requires capping or removing the main gas service entry inside the building, and Con Edison handles the street-side service line.

NYC’s “gas ban” applies only to new construction and major renovations, existing brownstones are grandfathered, so this conversion is voluntary, not required. Residents in co-ops and condos can make individual choices about appliance electrification, subject to board approval. The framing matters: you are choosing this conversion, and you control how far it goes.

Who Is Legally Allowed to Do Each Part of the Work?

Three different license types control this project. No single contractor can legally handle all of it.

Plumbing work, including all gas piping, must be performed by or under the direct supervision of a NYC Licensed Master Plumber. Gas piping, water service lines, and related connections all fall under this requirement. Electrical work, including the panel upgrade almost every brownstone heat pump conversion requires, needs a licensed electrician filing separately. See our guide on whether your panel actually needs an upgrade before scheduling the LME.

What DOB Permit Does the Plumber File to Cap the Gas Line?

Capping an appliance gas line in a brownstone falls under a Limited Alteration Application (LAA). The LAA is a streamlined permit process designed for minor plumbing and gas piping work that does not require plans stamped by a PE or registered architect. The LMP files the LAA entirely in DOB NOW: Build, and permits are issued in real time for eligible jobs.

The DOB’s own fee schedule sets the LAA permit fee at $130 to $280 for most residential gas work. In practice, contractors quote all-in prices of $2,000 to $5,000 or more, covering the permit fee plus affidavits, a pressure test, the physical labor, and the plumber’s liability exposure. That gap between the government filing fee and the contractor quote is real and documented, what you pay the plumber is for their license, their paperwork, and the pressure test, not just the DOB filing.

After the work is complete, the LMP must complete all required inspections and submit a pressure-test affidavit before the job can receive final sign-off. Once sign-off is issued, the LMP requests a Letter of Completion through DOB NOW: Build. The gas line cannot be left in a state where uninspected or non-permitted work is open on the property.

How Does Boiler Decommissioning Work in NYC? (OP49 Explained)

Removing a boiler from service in NYC triggers a separate DOB obligation that has nothing to do with your plumbing permit. NYC DOB form OP49, formally called “Self-Certification of Removed, Disconnected, or Non-Existing Boiler”, must be filed within 30 days of the date the boiler is disconnected or removed. The OP49 filing fee is $45; late filing carries a $50-per-month penalty up to a $500 annual maximum.

The OP49 checklist confirms that all five required decommissioning steps were completed:

• [1] Gas line capped (or oil burner removed, for oil boilers): the appliance gas line to the boiler is physically capped.
• [2] Water supply cut off: the water feed to the boiler is closed and disconnected.
• [3] Electrical supply disconnected: all power to the boiler controls, circulator pumps, and ignition is cut.
• [4] Steam or hydronic header disconnected: the steam or hot-water distribution header is cut above the boiler and physically separated from the system.
• [5] Flue pipe removed: the flue connection at the chimney base is capped or removed.

Con Edison’s Clean Heat decommissioning checklist adds further specifics: zone circulator pumps and circulation pipes must be capped, the burner and controls removed, and dated pre- and post-removal photos taken of the capped fuel line and sealed vents. If the decommissioned boiler shared a common atmospheric flue with another gas appliance, the most common situation is a gas water heater venting into the same chimney, the remaining appliance’s vent must be resized to prevent carbon monoxide spillage before the job is considered complete.

The OP49 is filed by the property owner (or their authorized inspector) and submitted through DOB’s boiler filing system. An authorized boiler inspector’s seal is typically required unless an HPO or stationed master plumber is completing the certification. Filing late creates open violations that can block future permits and complicate a co-op or condo board alteration agreement.

Landmark Districts and Co-op Boards: Extra Steps Before the Plumber Shows Up

If your brownstone sits in a landmarked historic district, Park Slope, Brooklyn Heights, Harlem, the Upper West Side, or similar areas, the LPC does not regulate what happens inside the basement. However, any exterior penetration associated with the heat pump installation (condenser placement, line-set routing through the facade, or a new electrical service entry) may require LPC approval before DOB will issue a permit. Interior decommissioning work itself does not trigger LPC review. For a full breakdown of what does and doesn’t require landmark approval, see our post on NYC mini split permits, co-op rules, and LPC requirements.

In a co-op or condo, the board’s alteration agreement governs what work requires prior board approval. As of January 26, 2026, co-op and condo boards must formally attest in DOB NOW before any permit filing is accepted for the building. That means your LMP cannot even file the LAA until the board has completed that attestation. Budget 3 to 8 weeks for board review before you can start the permit clock, especially in buildings with monthly board meetings.

How Do You Stop the Con Edison Gas Standing Charge After the Conversion?

This is the step most guides skip entirely, and it is the one that costs brownstone owners real money after the boiler is gone.

Con Edison charges a daily delivery/standing charge on every open gas account regardless of how much gas is consumed. If you have decommissioned the boiler and capped the heating gas line but left the gas account open, that daily charge keeps accumulating. The meter does not need to be running for the charge to appear on your bill, the account being open is sufficient.

Here is what you actually do, depending on your scenario:

• Keeping cooking gas: No action needed beyond the plumbing work. The meter stays. The delivery charge continues but is legitimate because you still use the gas service.
• Shutting off gas entirely: Call Con Edison at 1-800-752-6633 or use the online service management portal to request a full gas service termination. Con Edison will schedule a technician to remove the meter and cap the street-side service line. Do this only after the LMP has completed all interior gas piping work, the pressure test is done, and the boiler OP49 has been filed. Requesting meter removal before the interior work is permitted and inspected creates a sequence problem, Con Edison expects the piping to be in a safe, inspected state before they pull the meter.
• Meter removal, not just account closure: Closing the account stops billing, but if the meter is still physically on the building, it may be re-activated by a future occupant or remain as an open utility point. If you want it physically removed, specifically request “gas service termination and meter pull” when you call. Con Edison performs the meter removal at no charge as part of service termination.

After the meter is removed, Con Edison’s jurisdiction over the gas service ends at the point where the service line met the meter. All piping inside the building downstream of where the meter was is then entirely the owner’s responsibility under NYC Construction Code, it is no longer under state utility commission jurisdiction.

Step-by-Step: The Full Sequence for a NYC Brownstone Gas-to-Heat-Pump Conversion

1. Decide scope: Heating only, heating + water heating, or full gas shutoff. This determines which pipes get capped and whether you keep or remove the meter.
2. Get board/LPC approval (co-op/condo/landmark): Secure the alteration agreement sign-off and board attestation in DOB NOW before any permits can be filed. Allow 3 to 8 weeks.
3. Hire a Licensed Master Plumber: The LMP files the LAA in DOB NOW: Build, performs the gas line cap, conducts the required pressure test, submits the pressure-test affidavit, and obtains final plumbing sign-off from DOB.
4. Hire a Licensed Master Electrician (if needed): The LME files electrical permits for any panel upgrade or new circuits serving the heat pump. This often runs in parallel with the plumbing work.
5. Complete boiler decommissioning: Once the boiler is disconnected, confirm all five OP49 conditions are met, take dated photos of the capped fuel line and sealed vents, and file form OP49 within 30 days. The $45 filing fee is paid at submission.
6. Notify Con Edison: If keeping cooking gas, no account action is needed. If going fully electric, call Con Edison to schedule meter removal only after the LMP has final DOB sign-off on the plumbing work.
7. Close or convert the gas account: If shutting off gas entirely, confirm in writing that the account is closed, not just suspended. Save the close-out confirmation and the final meter read date for your records.

Permit and Cost Reality: What You Will Actually Pay

The gap between the DOB’s $130 LAA fee and a plumber’s $3,800 to $5,000 quote is not a scam, it reflects the professional liability, affidavit preparation, expediter fees, and actual physical labor involved. Get at least two quotes and confirm that each includes the pressure test and final DOB sign-off, not just the physical pipe work. For help evaluating contractors, see our guide on how to choose an HVAC contractor in NYC.

Common Mistakes to Avoid

• Capping the gas line without a permit. Unpermitted gas work is a DOB violation. Fines start at $2,500 and a stop-work order can freeze the entire project. The LMP must file before touching the pipe.
• Missing the 30-day OP49 window. The clock starts on the disconnection date, not the installation date of the heat pump. Filing late means $50 per month in penalties that accumulate until the form is submitted.
• Requesting meter removal before the plumbing work is inspected. If Con Edison pulls the meter while there is still an open LAA with no final sign-off, you may face issues resuming any gas service and complications with the DOB permit record.
• Not resizing the vent when a shared flue loses one appliance. If a gas water heater shared a chimney with the decommissioned boiler, that water heater’s vent is now oversized for the remaining load, creating a carbon monoxide spillage risk. This is a required correction, not optional.
• Leaving the Con Edison gas account open after full electrification. The daily delivery charge does not stop automatically when you stop using gas. You must actively close the account and request meter removal to end the billing.
• Skipping board attestation in a co-op or condo. Since January 26, 2026, DOB NOW will not accept permit filings for co-op or condo buildings until the board has formally attested. Filing before this step is completed causes rejection and delays.
• Confusing “capping the appliance line” with “terminating gas service.” These are different actions with different parties. The LMP caps interior piping; Con Edison handles the meter and street-side service line. Neither can do the other’s job legally.

Frequently Asked Questions

Can I cap the gas line myself, or does it have to be a licensed master plumber?

It must be a licensed master plumber. In NYC, all gas piping work, including capping an appliance line, must be performed by or under the direct supervision of an LMP who holds an active NYC license. The LMP also files the LAA permit in DOB NOW and submits the required pressure-test affidavit. Doing this work yourself or using an unlicensed handyman is a code violation subject to fines starting at $2,500 and potential criminal liability.

What is DOB form OP49, and who files it?

OP49 is the NYC DOB self-certification form for a removed, disconnected, or non-existing boiler. It confirms that the gas line to the boiler has been capped, the water supply cut, the electrical supply disconnected, the distribution header physically separated, and the flue pipe removed from the chimney base. It is filed by the property owner (or their authorized inspector) within 30 days of boiler disconnection. The filing fee is $45; late filing penalties are $50 per month.

How do I stop the Con Edison gas delivery charge after switching to a heat pump?

If you are keeping cooking gas, you cannot stop the delivery charge, it applies to any open gas account. If you are going fully electric, you must call Con Edison (1-800-752-6633) or use the online service portal to request full gas service termination and meter removal. Do this after your LMP has final DOB plumbing sign-off. The meter pull is free. Once the account is closed and confirmed in writing, billing stops.

Does capping the gas line in a landmark district require LPC approval?

No, LPC does not review interior mechanical work. Capping the gas line inside your basement is not subject to Landmarks Preservation Commission review. What may require LPC approval is any exterior work associated with the heat pump installation, such as placing the outdoor condenser on the front facade or roof of a landmarked brownstone, or routing line sets through the front wall. The DOB permit for interior gas piping proceeds independently of LPC.

Can I keep gas for cooking while electrifying my heating and hot water?

Yes. Partial electrification is common and legal in NYC brownstones. The LMP caps only the branch lines serving the boiler (and water heater, if applicable), leaving the cooking gas line active. The meter stays, and you continue to pay the monthly delivery charge for cooking gas. The OP49 form still needs to be filed for the decommissioned boiler within 30 days. Board approval in a co-op or condo applies to each appliance change individually.