Downsizing, ADUs & the “Silver Tsunami” Myth — October 2026 | What South Shore, Boston & Cape Cod Buyers & Sellers Need to Know

By Charles King | Published October 27, 2026
Sources: Charles King, Charles King Group; national data reported by Banker & Tradesman (October 25, 2026), citing Realtor.com, the CDC, the UMass Donahue Institute, Freddie Mac, and Massachusetts state ADU data

I’ve sold real estate on the South Shore since 2012, and I was born and raised in Hingham. One question comes up constantly from buyers in Hingham, Cohasset, Scituate, Norwell, and Hanover: when are all the longtime homeowners going to sell?

For more than a decade, the industry has predicted a “silver tsunami,” a wave of Baby Boomer homeowners listing all at once and flooding the market with inventory. New national research confirms what I see locally: it’s coming later, and more slowly, than most people think. Realtor.com projects that the peak year for Boomers leaving their homes won’t arrive until after 2036.

Here is what that means for South Shore buyers and sellers, and for anyone planning a move for themselves or a parent.

Is a “Silver Tsunami” of Home Sales Coming to Massachusetts?

Not soon, and not as a single wave. Here are the national headline numbers, reported by Banker & Tradesman:

• 37 million homes nationwide are owned by Baby Boomers (born 1946–1964), per Realtor.com.
• Nearly 14 million homes are expected to be vacated by Boomers and the Silent Generation over the coming decades.
• 2029: the year Boomers are expected to become the majority of older sellers. Today, most older sellers are still from the Silent Generation.
• After 2036: the projected peak year for Boomers leaving their existing homes.
• 79 years: average U.S. life expectancy, up from 77 in 2006, per the CDC.
• About 18%: the projected share of Massachusetts residents over 65 by 2050, per the UMass Donahue Institute.

What it means: If you’re a buyer waiting for a flood of downsizer listings to ease competition in Hingham, Norwell, or Duxbury, don’t plan around it. Supply from older homeowners will arrive gradually over the next 10 to 15 years, not in the next spring market.

Why Are South Shore Homeowners Staying Put Longer?

Longer lifespans are the biggest factor. People are living longer and staying healthier, and many prefer to stay in the homes and towns they love. Finances also play a part. With mortgage rates around 7.4% at the time of the Banker & Tradesman report, trading a paid-off or low-rate home for a new purchase is a hard calculation, especially on a retirement income.

Here on the South Shore, the result is long ownership tenures. Many homes in Hingham, Cohasset, and Scituate have had the same owners for decades, and that keeps the supply of established single-family homes tight.

What it means: Low turnover among longtime owners is one structural reason South Shore inventory stays thin. Interest rates are not the whole story.

What Do Downsizers Look for in Their Next Home?

When I work with clients who are right-sizing, the same priorities come up again and again:

• Low or no maintenance. After decades of managing a roof, a yard, and a list of projects, most want a simpler home.
• Single-level living, with a first-floor primary suite, walk-in showers, and accessible layouts.
• Community. That can mean a 55-plus community, but just as often it means a walkable neighborhood near a town center, close to friends, activities, and family.
• Time to decide. This is often the biggest financial and emotional decision in decades, and the process should move at the client’s pace, not the market’s.
• Practical technology, such as smart thermostats, video doorbells, and smart locks, which help with peace of mind for both the homeowner and their family.

What it means: If you’re selling a home with one-floor living, a first-floor primary suite, or a low-maintenance condo near Hingham Square or Cohasset Village, you’re selling exactly what this growing buyer group wants. Price and market it accordingly.

Are ADUs Changing How Massachusetts Families Plan for Aging?

Yes. Since Massachusetts legalized accessory dwelling units by right statewide in early 2025, nearly 2,100 ADUs were approved in the first 18 months, according to state data reported by Banker & Tradesman.

For South Shore families, ADUs open up options that didn’t exist a few years ago:

• Parents move closer to family. An aging parent sells their home and moves into an ADU on an adult child’s property, or the reverse. Everyone stays close and keeps their privacy.
• Owners create retirement income. Some homeowners build an ADU for themselves and rent out the main house.
• Families plan for multigenerational living. In a 2022 Freddie Mac survey, 37% of respondents said they would use an ADU to house a relative, either temporarily or permanently.

Budget is a real factor. Reported prices for factory-built ADUs in Massachusetts range from about $147,000 to more than $300,000, depending on design, before any site work your property may need.

What it means: On larger lots in Norwell, Hanover, Scituate, and Duxbury, an ADU can be a real alternative to selling and buying. If you’re buying, a property that can support an ADU now carries long-term flexibility, and I factor that in when I help clients compare homes.

Can Retirees Get a Mortgage to Buy Their Next Home?

Financing is one of the biggest hurdles I see for buyers over 60. Without a paycheck, qualifying can feel uncertain. However, lenders can often count documented retirement income, such as Social Security, pensions, and regular retirement-account distributions.

My advice is always the same: talk to a lender before you list. Know what you can buy, and whether you need your sale proceeds to do it, before you put your home on the market.

Condition matters too. Deferred maintenance on a longtime home shows up in the offers, and that directly affects how much cash you’ll have for your next purchase.

What it means: For sellers 60 and older, the order of operations is to talk to a lender, get a realistic value for your current home, and then build a plan for timing the sale and the purchase together.

What This Means for Sellers

If you’ve owned your home in Hingham, Cohasset, Scituate, Norwell, or Hanover for a long time and are thinking about a move, a few things work in your favor right now:

• Less competition from other downsizers. The wave hasn’t arrived, so well-prepared homes still meet limited supply.
• Preparation pays. Address the big items, such as roof, systems, and obvious wear, before listing. Buyers price in everything they see.
• You have options beyond a traditional sale, including an ADU on a family member’s property, an ADU on your own lot, or a move to a condo or 55-plus community.
• Give yourself time. A thoughtful timeline almost always produces a better result than a rushed one.

What This Means for Buyers

• Don’t wait for a flood of inventory. Boomer listings will grow gradually through the 2030s, not all at once.
• Look at ADU potential. A lot that can support an ADU adds long-term flexibility for aging parents, adult children, or rental income.
• Single-level and low-maintenance homes will stay in demand as the over-65 population grows, which supports their long-term value.
• On Cape Cod, many owners bought second homes with retirement in mind. Expect those homes to come to market gradually as owners age, rather than as a sudden increase in supply.

October 2026 Outlook

The aging of Massachusetts homeowners is one of the most important long-term forces in our market, but it’s a slow one. Over the next decade, expect gradually rising supply from longtime owners, steady demand for one-floor and low-maintenance homes, and continued growth in ADUs as families rethink how generations live together.

If you’re weighing a move for yourself or a parent, whether that means selling, buying, or building, I’m glad to talk it through with no pressure and on your timeline.

Frequently Asked Questions

Is a ‘silver tsunami’ of home sales coming to Massachusetts?

Not anytime soon. Realtor.com projects that the peak year for Baby Boomers leaving their homes won’t arrive until after 2036, making this a decade-long trend rather than a sudden wave. Source: Banker & Tradesman, October 25, 2026, citing Realtor.com.

When will Baby Boomers start selling their homes in large numbers?

Boomers are expected to become the majority of older home sellers around 2029, and their peak selling year is projected to come after 2036. Until then, most older sellers are members of the Silent Generation. Source: Banker & Tradesman, October 25, 2026, citing Realtor.com.

Can I build an ADU on my property in Massachusetts?

Massachusetts legalized accessory dwelling units by right statewide in early 2025, and nearly 2,100 ADUs were approved in the first 18 months. Local rules on size, setbacks, and design still apply, so check with your town’s building department before you plan. Source: Banker & Tradesman, October 25, 2026, citing Massachusetts state data.

How much does an ADU cost in Massachusetts?

Reported prices for factory-built ADUs in Massachusetts range from about $147,000 to more than $300,000, depending on design. Site work, utilities, and permitting can add to that total depending on your property. Source: Banker & Tradesman, October 25, 2026.

Can retirees get a mortgage to buy a home in Massachusetts?

Yes, though financing is one of the biggest hurdles for buyers over 60. Lenders can often count documented retirement income such as Social Security, pensions, and retirement-account distributions, so Charles King recommends speaking with a lender before listing your current home. Source: Charles King, Charles King Group, October 2026.

What do downsizers look for in a home on the South Shore?

According to Charles King, right-sizing buyers most often want low-maintenance living, single-level layouts with a first-floor primary suite, and a real sense of community. In Hingham and Cohasset, homes with one-floor living or condos near the town center fit that list especially well. Source: Charles King, Charles King Group, October 2026.

Is it a good time for longtime homeowners to sell on the South Shore?

For well-prepared homes, conditions are favorable because the expected wave of downsizer listings hasn’t arrived, which keeps competition from similar homes limited. With mortgage rates around 7.4% as of late October 2026, Charles King advises sellers who are also buying to plan their financing and timing early. Sources: Charles King, Charles King Group, October 2026; Banker & Tradesman, October 25, 2026.

Sources: Charles King, Charles King Group (October 2026). National and state data reported by Banker & Tradesman (October 25, 2026), citing Realtor.com, the Centers for Disease Control and Prevention, the UMass Donahue Institute, Freddie Mac, and Massachusetts state ADU data. Published by Charles King, Charles King Group, Hingham, MA.

Charles King leads the Charles King Group, a top-producing real estate team serving the South Shore (Hingham, Cohasset, Scituate, Norwell, Hanover, and surrounding towns), Boston, Cape Cod, Metro West, Northern Middlesex & the Merrimack Valley, and Bristol County. Brokered by Real Broker MA, LLC. Ranked in the top 1.5% of agents nationwide by Real Trends.