Boston Water Lien Certificate: What Sellers Must File

Boston sellers need a separate lien certificate from the Boston Water and Sewer Commission (BWSC), and the application and fee must be filed at least 10 working days before closing so BWSC can schedule a final inside meter reading. The fee is $25 for a one, two, or three family home, and the real risk is timing, not cost.

What is a water lien certificate, and do Boston home sellers need one?

Yes, in practice. Before a Boston sale closes, someone files an Application for a Certificate of Water, Sewer and Stormwater Charges, also called a lien certificate, with the Boston Water and Sewer Commission (BWSC). BWSC requires the application and fee at least 10 working days before the closing date so it can schedule a final reading of the inside water meter, and the certificate can be emailed, mailed, or faxed the day after the reading. Fees are $25 for a one, two, or three family home or a condo in a building of one to three units, and $100 for a four family, an apartment building of four or more units, or a condo master account of four or more units.

Most Boston sellers have never heard of this document until roughly two weeks before closing, when their attorney asks whether it has been ordered. That is usually the moment it becomes a problem.

Here is what it is, why Boston handles it differently from many Massachusetts cities and towns, and how to keep it from moving your closing date.

Key Takeaways

File the BWSC application and fee at least 10 working days before closing, which is two full calendar weeks, and longer when a holiday falls inside the window.
Order it when the Purchase and Sale Agreement is signed; the seller, buyer, attorney, or real estate broker can file it.
Someone has to let the reader in for the inside meter reading, so on a tenant-occupied building give tenants at least 48 hours of written notice.
Fees are $25 for a one, two, or three family and $100 for a four family or an apartment building of 4 units or more.
Any balance through the final reading is paid from your proceeds at closing.

Why is Boston's water lien certificate different?

Because BWSC is a separate commission, not a city department, so its certificate is a separate application from the city's municipal lien certificate. Under state law (M.G.L. c.60 §23), a municipal lien certificate from the local collector lists the taxes and other charges, including water rates and charges, that are liens on a parcel. In many communities the water department is part of the municipality, so one certificate request covers it.

Boston's water, sewer, and stormwater service is billed by BWSC, a separate commission rather than a city department, and BWSC runs its own lien certificate process through its Lien Department. Your attorney orders the municipal lien certificate from the City of Boston for property taxes, and the BWSC certificate is a separate application, a separate fee, and a separate appointment.

The reason it matters is not the fee. Unpaid water and sewer charges can be a lien on the property itself, which is why a buyer's attorney wants the certificate before closing. It shows what is owed through the final reading so the balance can be paid and nothing follows the property to the new owner.

When do you need to file for a Boston water lien certificate?

At least 10 working days before your closing date. BWSC's requirement is specific. The completed, signed application and the fee must be filed with the Lien Department at least 10 working days before your closing date, so the Commission can schedule the final reading. Applications must include a name and a contact number.

Ten working days is not ten days. It is two full calendar weeks, and longer when a holiday falls inside the window. Line that up against a Massachusetts Purchase and Sale Agreement, where the closing date is a real deadline rather than a target, and you can see the exposure.

A few practical points Juan Murray gives every seller:

Order it when the Purchase and Sale Agreement is signed, not when the closing gets close. That is the natural moment to start, and it costs you nothing to be early.
The application goes to the Lien Department by mail at 980 Harrison Avenue, Boston, MA 02119, with the fee. Build mail time into your ten working days rather than assuming the clock starts the day you drop it in the box.
The seller, buyer, attorney, or real estate broker can file it. Because it can be anyone, decide out loud who is doing it and confirm it was actually sent. The Lien Department answers questions at 617-989-7160.
Confirm the appointment happened. The certificate depends on the reading. No reading, no certificate.

Juan tracks this for his sellers alongside the smoke and carbon monoxide certificate and, for condo owners, the 6(d) certificate, because any one of these items can push a Boston closing date just as easily as a financing problem can.

Who needs to be there for the final water meter reading?

Someone who can let the reader in to the inside meter. BWSC schedules a final reading from the inside water meter. Someone has to let the reader into the building.

For an owner-occupied single family in Roslindale or Hyde Park, that is a scheduling inconvenience. For a two family in Jamaica Plain or a triple-decker in Dorchester with tenants in place, it is a real coordination problem.

The state sanitary code (105 CMR 410.003) requires occupants to give the owner reasonable access, on reasonable notice and by appointment where possible, for repairs and code compliance, and it requires owners to give at least 48 hours' notice except in emergencies. A meter reading for a sale is not a code repair, so check your lease's entry clause, and treat 48 hours of written notice as a sensible minimum.

So the sequence for a tenant-occupied building is longer than for an owner-occupied one:

File the application at least 10 working days out.
Get the appointment date from BWSC.
Give your tenants written notice, at least 48 hours ahead, of the date and window.
Make sure someone can actually open the door, including access to wherever the meter sits, which in older Boston housing is often a basement behind a locked door.

If your meter is in a locked basement and your tenant works days, you need to know that now, not on the morning of the reading. On a tenant-occupied multi-family, this conversation happens early, for the same reason showings and notice for a tenant-occupied Boston sale get sorted out before the property goes live.

If the meter cannot be read, the certificate cannot be issued on schedule, and you may be back at the start of a clock you no longer have room for.

How much does a Boston water lien certificate cost?

The fee is $25 to $150 depending on property type, and the larger cost is your final balance. The certificate fee itself is small. BWSC's published residential and condo fees:

Property type	Lien certificate fee
One, two, or three family	$25
Four family	$100
Apartment building, 4 units or more	$100
Condo, 1 to 3 units	$25
Condo master, 4 units or more	$100
Condo parking	$150
Mixed residential and commercial	$150

The bigger line is the balance itself. Whatever the final reading shows through your closing is paid from your proceeds at the closing table. On a three family, that usage covers every unit on the meter.

Since April 1, 2024, BWSC bills have shown three separate line items: water, sewer, and stormwater. The stormwater charge is based on impervious surface such as roofs, driveways, and patios. Residential properties with one to six units are charged a single flat rate of one Equivalent Residential Unit, $9.06 per month in 2026; condominiums are billed under a different method. Nothing about that changes what you owe at closing, but the final bill may look different from the one you remember.

For how this sits next to your deed excise tax, attorney fee, and recording costs, see what it costs to sell a home in Boston and what you actually net, or run your own figures with the net proceeds estimate.

After the closing, the new owner files a Change of Ownership and Billing Name form with BWSC so the account moves into their name. It is worth mentioning at the table so nobody assumes it happens automatically.

How do you keep the water lien certificate from delaying your closing?

Start early and confirm the meter reading. A water lien certificate is a $25 document that can cost you your closing date. It is not complicated or expensive, and it is avoidable with two weeks of lead time and one phone call. What makes it risky is that nobody mentions it until the calendar has already tightened.

If you are thinking about selling in Jamaica Plain, Roslindale, Hyde Park, Dorchester, or Roxbury and want to know what your timeline looks like and what you would walk away with, Juan Murray offers private, no-pressure consultations. Schedule a conversation.

FAQ

How long does a Boston water lien certificate take?

Plan on at least 10 working days, because that is the lead time BWSC requires to schedule the inside meter reading. The certificate can be sent by email, mail, or fax the day after the reading.

Who orders the final water reading, the seller or the attorney?

Either can. BWSC accepts the application from the seller, the buyer, the attorney, or the real estate broker. Confirm in writing who is filing it as soon as the Purchase and Sale Agreement is signed.

What happens if the water bill is not paid before closing?

Unpaid water and sewer charges can be a lien on the property, so they follow the real estate rather than the person. In practice the balance is paid from your proceeds at closing, which is why the buyer's attorney wants to see the certificate first.

Does a condo owner in Boston need a water lien certificate?

Usually yes. The fee is $25 for a condo in a building of one to three units and $100 for a condo master account of four or more. How your building meters and bills water varies, so check with your management company early. This is separate from the 6(d) certificate your association issues.

Can I sell my Boston home if I owe money to BWSC?

Yes. An outstanding balance does not block a sale; it is resolved at or before closing, typically from your proceeds. The problem is usually timing, when the certificate was not ordered early enough for the number to be known.

The bottom line: order your BWSC lien certificate when the Purchase and Sale Agreement is signed and line up access to the inside meter, so a $25 document doesn't move your closing date.

Sources

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About Juan Murray

Juan Murray is a Boston broker associate with more than 30 years of experience helping buyers, sellers, and investors across Greater Boston, personally leading every transaction from the first conversation through closing.

RE/MAX Real Estate Center · (978) 581-0801

Equal Housing Opportunity. Juan Murray is licensed as a Broker in Massachusetts, regulated by the Massachusetts Board of Registration of Real Estate Brokers and Salespersons. This article is general information only and does not constitute legal, tax, or financial advice. Confirm your specific costs and obligations with your closing agent, tax advisor, or lender.