2026-11-01 · 5 min read · East Bay Area
Downsizing in Brentwood Once the Kids Are Gone: What It Actually Looks Like
The House Stays the Same Size While Your Life Changes
A lot of homes in Brentwood were bought when more people lived in them. Then the kids move out, and the house stays the same size. At The Mashore Group, owners all over Brentwood ask us what downsizing actually looks like. The real answer is less dramatic than most people expect. Downsizing is usually a series of smaller decisions made over several months, and the sale comes last.
This guide covers how that plays out in practice. It starts with the rooms you've stopped using and ends with the property tax rule you should check before you choose your next address.
Start With the Rooms You Actually Use
For a few weeks, pay attention to which rooms you actually go into. Many owners find that a spare bedroom has turned into storage, the formal dining room gets used twice a year and the backyard takes up a weekend every month. Noticing this tells you what your next home really needs to have.
- Count the bedrooms you would actually use, including one for guests or a home office.
- Ask yourself whether stairs bother you now or will in ten years.
- Decide how much yard you want to look after, and whether the pool is something you enjoy or a chore.
- Figure out how much garage space you need for cars, tools and the hobbies you plan to keep.
- Think about how far you want to be from the people and places you visit most.
Your answers may not point to the obvious choice of a smaller house. Some owners want about the same square footage, just on one level. Others want a smaller lot but would keep the same kitchen.
Three Paths Brentwood Owners Usually Weigh
Stay and adapt. Some owners stay put and change how the property gets used. The City of Brentwood posts its accessory dwelling unit rules and an ADU FAQ on its Community Development pages. A unit in the backyard, or a junior unit inside the house, gives a large lot a new purpose. You keep your address, but you take on a construction project, so get the work priced before you commit.
Move within Brentwood. Other owners want a smaller or single-level home without changing their grocery store, doctors or daily routine. The city also has age-restricted communities. Trilogy at the Vineyards, on Trilogy Parkway, is described on activeadultliving.com as a 55+ community built by Shea Homes around a clubhouse called Club Los Meganos. 55places.com lists Summerset as another 55+ community in Brentwood. These communities have their own HOA rules, so read the governing documents closely. Our Brentwood area guide explains how the city's neighborhoods differ.
Move nearby, or move away. Some owners trade an inland lot for a waterfront home in Discovery Bay, or they look at newer, smaller homes in Oakley. Others leave the area entirely to live closer to family or to cut their cost of living. Each of these choices changes the timing of everything else. That is why it helps to settle on where you're going before you pick a listing date.
Check the Property Tax Rule Before You Choose a Next Home
For many long-time owners, the biggest worry about moving is giving up a low property tax base. California voters approved Proposition 19 in November 2020. The California State Board of Equalization's Proposition 19 fact sheet says homeowners age 55 or older can transfer the taxable value of their principal residence to a replacement home up to three times, anywhere in the state. The Los Angeles County Assessor's summary of the same rule says the replacement home has to be bought or built within two years of selling the original.
The Board of Equalization's materials also explain that if the replacement home is worth more than the original, the transferred value is adjusted upward. The actual numbers depend on the two specific homes. This is a tax question, not a real estate question. Confirm that you qualify with the Contra Costa County Assessor's office, which posts the claim form on its website. Also talk to a tax professional before you build this rule into your plan.
The Hardest Part Is Usually the Stuff
Ask owners what slowed their downsize down and most won't mention the market. They'll mention the garage. Sorting through years of belongings takes longer than anyone expects, and decisions about sentimental items don't get easier under a deadline.
- Give your grown children a date to pick up what they want, and stick to it.
- Sort one room at a time, starting with the rooms you use least.
- Measure the rooms in your next home before you decide which furniture goes with you.
- Book donation pickups and hauling early so they aren't crammed into the last week.
Owners who start sorting months before they list tend to have a calmer sale. A house with less in it also photographs better, and that matters for the next step.
Selling the Bigger House Is Its Own Project
The home you're leaving is set up for the way you lived in it. Buyers will walk through it with their own plans in mind, so the work before listing is about making each room's purpose obvious. If a bedroom became a storage room, it needs to look like a bedroom again. A dated feature may be worth a small repair, or it may be better left for the next owner. That call depends on what comparable Brentwood homes are offering right now.
That's why our selling process starts with pre-listing advice. In a published Zillow review, one client said our help ran "from the pre-listing advice, to the selling process, to the follow up attention after the sale." Downsizing sellers need that whole range because they're dealing with two homes at once. If you'd like to see what's for sale at the size you have in mind, browse our current listings.
Start the Conversation Before You Have a Date
Downsizing goes best when nobody is rushing it. Some of our sellers contact us a year before they plan to list. That leaves time to sort, to price the next home and to look into the tax rules without pressure. A first conversation doesn't commit you to anything. It gives you a clear sense of what your Brentwood home could sell for and what your next step might be.
When you're ready to talk it through, contact The Mashore Group. We'll start with your questions, not with listing paperwork.