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The process · Selling · Updated September 29, 2026

The Nantucket seller's checklist: every document and certificate, in the order you'll need them

By Sean Kalman — The Kalman Co., brokered by eXp Realty. Massachusetts has a short list of things a seller can't skip, and the island adds a few of its own. None of them is hard. Most of them are slow if you start late. Here they are in the order they come up, so nothing pushes your closing date.

A sale moves through three stages: before you list, when you sign the purchase and sale agreement, and the weeks before closing. Each has its own paperwork. Gather the first group before the house goes on the market and the rest becomes routine.

Before you list: the file buyers will ask for

A buyer's attorney will pull most of this from the town and the Registry anyway. Having it in hand first means you find the surprises before they do.

  • How you hold title. Your deed, and if the house is in a trust or an LLC, the trust or entity documents that show who can sign.
  • A survey or plot plan, if you have one, showing the house, the lot lines and anything close to them.
  • Permits and certificates of occupancy for the house and for every addition or renovation since you've owned it.
  • Historic District Commission approvals for exterior work. The commission reviews exteriors across the whole island.
  • Septic or sewer. If the house is on town sewer, proof of the connection. If it's on septic, the system's records and the date of its last inspection.
  • Flood zone information, and an elevation certificate if one exists.
  • Rental history, if the house has been rented: recent seasons' income, next season's bookings and your registration paperwork.
  • Utility and carrying costs for the last year. Buyers ask.
  • A list of what stays. Furnishings, the outdoor furniture, the generator. Decide before the first showing.
A quiet Nantucket lane of gray-shingled houses and white picket fences under a clear sky

When you sign the purchase and sale agreement

Two state requirements land here.

The lead paint notification, for houses built before 1978. Under state and federal law, the seller and the agent give the buyer the Property Transfer Lead Paint Notification before the purchase and sale agreement is signed. You also hand over any lead inspection reports or compliance letters you have and tell the buyer what you know about lead in the house, and both sides sign the certification page. If you know nothing about lead in the house, you say so. The obligation is to notify, not to test.

The Title 5 inspection, for houses on a septic system. The system has to be inspected within two years before the sale. If it has been pumped every year since the inspection and you have the records, the inspection holds for three years. Only a state-approved inspector counts, the report goes to the Board of Health within 30 days, and the buyer gets a copy. When weather makes a winter inspection impossible, the rules allow it up to six months after the sale, provided the buyer is told in writing. Most buyers want the report in hand before they sign, so the practical time to order it is before you list. A house on town sewer doesn't need one.

Before closing

  • The smoke and carbon monoxide certificate. Every home sale needs a certificate of compliance from the local fire department. The state's guidance is to call the department as soon as you have a closing date. What your house needs depends on when it was built and when its last building permit was issued, so find those dates first. Battery alarms more than ten years old have to be replaced with sealed ten-year photoelectric units. The department charges a fee and inspects in person.
  • The Transferor's Certification, on any sale of $1 million or more. Every seller signs one and gives it to the closing attorney on or before closing, including Massachusetts residents. For sellers who live outside the state, it's also where an exemption or the lower withholding calculation is claimed.
  • Final water and sewer readings, so the last bills are settled at closing.
  • Payoff figures for any mortgage or line of credit, which your closing attorney requests from the lender.
  • Trust, LLC or estate paperwork your attorney needs to show who is signing. If an owner on the deed has died, clearing the state's estate tax lien is part of this, and it takes time.
  • Keys, codes, manuals and warranties, plus the caretaker's and the vendors' names if the buyer wants them.

What the buyer's side is doing at the same time

It helps to know what's happening across the table, because each of these touches your calendar.

  • Inspections, usually in the first two weeks after the offer is accepted. The house needs to be open, with the water and heat on.
  • The title search. The buyer's attorney reads the deeds, plans and liens on record at the Registry. An old mortgage that was paid but never formally discharged is a common find, and an easy one to fix with time.
  • The town's file. The same attorney, or the buyer's agent, reads the building, health and historic commission records for the house.
  • The appraisal and insurance, if the buyer is financing. The appraiser needs access, and the buyer's insurer will ask about the flood zone, the roof and the heating system.
  • The final walk-through, a day or two before closing, to confirm the house is in the condition the agreement describes and that what's staying has stayed.

The island items that take the longest

Three things cause most of the delays on Nantucket sales, and all three can be handled before you list.

The septic inspection. There are only so many approved inspectors on an island, and a failed or conditional report can mean repairs before closing. Ordering it early turns a possible crisis into a line item.

The permit file. A deck, an outdoor shower or a finished basement that never got a permit, or an exterior change the historic commission never saw, tends to surface when the buyer's attorney reads the town's file. Read it first.

A closed-up house. The fire department, the septic inspector and the buyer's inspector all need to get in, and the last of them needs the water and heat on. If you live off-island, decide who opens the house and who meets them.

Questions sellers ask about the paperwork

What documents do I need to sell a house on Nantucket?

Before listing: your deed and any trust or LLC documents, a survey if you have one, permits and certificates of occupancy, historic commission approvals, septic or sewer records, and flood zone information. At the agreement: the lead paint notification for a pre-1978 house and a Title 5 report if you're on septic. Before closing: the smoke and carbon monoxide certificate and, on sales of $1 million or more, a Transferor's Certification from every seller.

When do I need a smoke detector certificate to sell in Massachusetts?

Before closing. Every home sale needs a certificate of compliance from the local fire department showing the smoke and carbon monoxide alarms meet the requirements for the house. The state advises calling the department as soon as you have a closing date.

How recent does a Title 5 inspection have to be?

Within two years before the sale. If the system has been pumped every year since the inspection and you have the records, the inspection is valid for three years. If weather prevents an inspection, it can be done up to six months after the sale, with written notice to the buyer.

Does the lead paint law apply to my house?

If it was built before 1978, yes. You give the buyer the Property Transfer Lead Paint Notification before the purchase and sale agreement is signed, share any lead reports you have and what you know, and both sides sign the certification. You aren't required to test.

Do I need a survey to sell my Nantucket house?

It isn't a state requirement, but buyers, lenders and attorneys often ask for one, and on small in-town lots it answers questions about lot lines early. If you have one, put it in the file.

What does a buyer's attorney check in the town's file?

Building permits and certificates of occupancy, historic commission approvals for exterior work, the septic records and the number of bedrooms the system was designed for, and any zoning relief on record. The goal is to confirm that what's standing matches what was approved.
Sources: Massachusetts Department of Fire Services, Preparing Your Home for a Smoke and CO Alarm Inspection · MassDEP, Buying or Selling Property with a Septic System · Childhood Lead Poisoning Prevention Program, Property Transfer Lead Paint Notification · Department of Revenue, Filing and Withholding Rules: Real Estate Sales of $1 Million or More and the Massachusetts Estate Tax Guide. All read September 17, 2026. This page isn't legal advice.
Keep exploring Nantucket real estate.
The Selling GuideTitle 5 & SepticThe HDCSelling From Off-Island

If you'd like a second set of eyes on your file

Before a house goes on the market, I go through this list with the owner and pull the town's file the way a buyer's attorney will. If something's missing, there's time to fix it quietly. Call or text and we'll start with what you already have.
Call or text 508-228-4578 Email Sean
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Nantucket, MA 02554 · 508-228-4578 · sean@thekalmanco.com · Brokered by eXp Realty