2026-10-27 · 6 min read · East Bay Area

Rent It Out or Sell It? How East Bay Homeowners Can Decide

The Question Behind the Question

Many Brentwood homeowners hit the same fork in the road when they buy their next place. They can keep the old house as a rental, or they can sell it and start fresh. Holding on is tempting. The house is already yours, a tenant could cover some or all of the payment, and selling feels final. At The Mashore Group, we hear this question often from owners who are trading up, downsizing, or leaving the area. Our honest answer is that it depends on four things you can actually measure.

Those four things are the monthly math on your specific house, the tax clock that starts when you move out, the rules California and the City of Brentwood place on landlords, and what your equity could do for you if it were not tied up in the old address. You do not have to guess where prices are headed to work through any of them.

Run the Numbers on Your House, Not an Average

A published rent average is a starting point and nothing more. RentCafe's Brentwood page, last updated in March 2026, puts the average apartment rent at $2,724 a month. That figure describes apartments, though, and a detached house with a yard, a garage and more square footage will rent on its own terms. The rent number that matters is the one a comparable home near yours actually leased for recently.

Once you have a realistic rent, subtract everything the house costs you when you no longer live in it:

Your mortgage principal and interest.
Property taxes and any special assessments that appear on your tax bill.
Insurance. Ask your insurance agent whether your current policy still applies once you move out and a tenant moves in.
HOA dues, if the home has them.
Repairs, routine maintenance and landscaping.
The months when the house sits empty between tenants.
Property management, if you do not plan to take the calls yourself.

If the rent covers all of that with room to spare, the rental has a real case. If it covers only the mortgage, you are paying to be a landlord and betting that future appreciation will make up the difference. That can still be a reasonable bet, but you should make it on purpose.

The Tax Clock Starts When You Move Out

This is the part many owners miss. In Publication 523, the IRS explains that you may be able to exclude up to $250,000 of gain from the sale of your main home, or $500,000 if you are married and file jointly, as long as you owned the home and lived in it as your main home for at least two of the five years before the sale. The IRS also notes that those two years do not have to be consecutive. They just have to add up to 24 months within the five-year window.

Renting the house out does not take that exclusion away overnight, but it does start a clock. Once you have been out long enough that you no longer have two years of residence within the five years before a sale, a later sale may not qualify the way a sale today would. Years of rental use can also bring depreciation into your tax picture. If your home has gained a lot of value since you bought it, talk with a CPA or tax advisor before you sign a lease. That one conversation can change the answer completely.

The Rules You Would Be Signing Up For

Renting out a home in Brentwood is a business, and both the state and the city treat it that way.

The City of Brentwood. According to the City of Brentwood, residential rental properties in the city require a Business Tax Certificate under Brentwood Municipal Code Chapter 5.04. The city's website also describes a Rental Inspection Program, set up by the City Council in April 2008, which includes an exterior inspection of the property when a new certificate is issued.

California's Tenant Protection Act. The state's Tenant Protection Act of 2019, known as AB 1482, limits rent increases and requires a just cause to end many tenancies. San Francisco's official summary of the law says it expires on January 1, 2030. According to the Berkeley Rent Board's guide to the state law, a single-family home can be exempt only if two things are true. The owner cannot be a real estate trust, a corporation or an LLC with a corporate member, and the landlord must have told the tenant in writing that the tenancy is exempt. Owners who skip that written notice can end up covered by rules they never expected.

Getting the house back. If you think you might move back in someday, or sell to someone who wants to live there, find out how that works with a tenant in place. For tenancies covered by the just cause rules, Bay Legal's summary of California owner move-in law says the owner or a qualifying relative must move in within 90 days after the tenant leaves and then live there as a primary residence for 12 consecutive months. A landlord-tenant attorney can tell you exactly what applies to your home.

What Your Equity Could Do Instead

If you keep the old house, your equity stays in it. For some owners that is the whole point, because they want to hold the house as a long-term asset. For others, that equity is the down payment on the next home, a cushion for retirement, or the money that lets them buy without stretching. Ask yourself whether you can comfortably qualify for and carry the next home while you still own the old one. Your lender can answer that before you commit to either path.

Owners 55 or older have one more thing to weigh. The California State Board of Equalization explains that Proposition 19 lets homeowners 55 or older transfer the taxable value of their principal residence to a replacement principal residence anywhere in California, up to three times, as long as certain requirements are met. Because that benefit is built around selling the original home, renting it out instead could mean you never use it. Confirm the details with the Contra Costa County Assessor before you decide.

Questions to Answer Honestly

Before you choose, work through these questions with whoever shares the decision with you:

Do you actually want to be a landlord, including the evening call about a leaking water heater?
Does the realistic rent cover every cost of owning the house, or only the mortgage?
How long have you been out of the home, and what does that mean for your tax exclusion?
Is the house ready to rent, or would it need work before a tenant moves in?
Are you keeping it because it is a good investment, or because selling feels hard?
If you needed to sell in a few years, would a tenant in place make that harder?

The last two questions matter more than they seem to. Plenty of owners hold on to a house because letting go feels emotional, and then they sell a few years later anyway, with a tenant to work around and a tax picture that has changed.

Get Both Numbers Before You Decide

The clearest way to make this call is to put two numbers side by side: what the home would likely sell for in today's Brentwood market, and what it would realistically rent for. We can help with the sale side. You can see how we prepare and market a home on our process page, or read more about the local market on our Brentwood area page. Add the rental numbers and your tax advisor's input, and the answer usually gets much clearer.

If you are weighing this choice now or planning a year ahead, reach out to The Mashore Group. We will help you see the sale side clearly so you can compare it honestly against keeping the house.