2026-10-30 · 6 min read · East Bay Area

Rent It or Sell It? Keeping Your Old Brentwood Home as a Rental

The Question Behind the Question

Many homeowners in Brentwood reach the same choice when they buy their next place. They can sell the old house, or they can keep it and rent it out. Renting sounds good because the house is already partly paid down, the rent might cover the mortgage, and the property could keep gaining value while someone else lives in it. At The Mashore Group, we hear this question most often from owners who have held a home long enough to build real equity. Renting can work well. It is still a business decision, though, and it comes with costs that rarely show up in a quick estimate.

This post covers the four things that usually decide it. They are a tax clock that starts when you move out, the rules for landlords in Brentwood and California, the real monthly numbers, and your long-term plan for the house. None of this replaces a tax professional or an attorney, so confirm every rule below with one before you act.

The Tax Clock Starts the Day You Move Out

For many long-time owners, the most important number in this decision is the gain on the house, not the rent. IRS Publication 523 explains that an owner who meets the ownership and use tests may be able to exclude up to $250,000 of gain from the sale of a main home, or up to $500,000 if married filing jointly. The use test looks at the five years before the sale and asks whether you lived in the home for at least two of them.

That five-year window is why timing matters so much. Once you move out and rent the house, the years you lived there begin to fall outside the window. If you keep it as a rental long enough, you can lose eligibility for the full exclusion, and gain you could have excluded may become taxable. Renting for a short time and then selling is a very different situation from renting for a decade.

Rental property also gets its own tax treatment, including depreciation. How that affects a later sale is a question for your CPA. Bring them your purchase date, your records of improvements and the date you plan to move, and ask them to run the numbers for both selling and renting before you decide.

What Being a Landlord in Brentwood Involves

Owning a rental in Brentwood comes with both local and state rules. The City of Brentwood's Rental Inspection Program page says the City Council passed an ordinance in April 2008 that created periodic inspections of residential rental property. The city's stated goal is to encourage owners to keep their units maintained. Read the city's current requirements for rental owners before your first tenant moves in, because they apply as soon as the house becomes a rental.

State law matters too. The California Tenant Protection Act of 2019, known as AB 1482, created statewide limits on rent increases and "just cause" eviction protections. San Francisco's summary of the law says it took effect January 1, 2020 and expires January 1, 2030. The California Apartment Association notes that a single-family home or condo is exempt only if it meets two conditions. It cannot be owned by certain entities, such as a corporation or a real estate investment trust, and the tenant must have received a specific written notice. An owner who skips that notice can end up covered by rules they assumed did not apply to them.

A 2018 city fact sheet from the Bay East Association of Realtors reported that Brentwood had no local rent control ordinance. Local rules can change, so check the current situation with the city before you rely on that.

A rental also takes time. Someone has to take the call when the water heater fails, handle the turnover between leases, and keep the home ready to rent. If you plan to move out of the area, you will probably need a property manager for that work, and the manager's fee comes out of the rent.

Run the Numbers on Your House, Not an Average

Rent estimates for Brentwood vary a lot depending on the source, the home's size and its condition. For example, RentHop's Brentwood page described median rents as roughly unchanged over the past year. That is a good reason not to count on rising rents to fix a thin margin. The number that matters is what your own house would rent for, checked against similar homes nearby that actually leased.

From that rent, subtract everything it costs to own the house as a rental:

Mortgage payment, if you still have one. Ask your lender about any occupancy terms on the loan.
Property taxes, along with any special assessments that appear on the bill.
Insurance, because a policy for a home you live in and a landlord policy are different products.
HOA dues, plus any rules your association has about leasing.
Maintenance and repairs, which tend to cost more when someone else lives in the home.
Vacancy, because a month between tenants brings in nothing.
Management, whether you pay a company or spend your own time.

Then look at your equity. If the house holds a large share of your net worth, keeping it leaves that money tied up in one property. Selling could free up that equity for a larger down payment on your next home, and that can change your new monthly payment more than the rent ever would. Compare the two options side by side instead of looking at the rent alone.

Property Tax and the Long Game

California's property tax rules can push the decision either way. Kassouni Law's overview explains that Proposition 13, which voters adopted in 1978, limits how fast assessed values can rise while a property stays with the same owner. The assessor generally reassesses the property when ownership changes. Owners who bought years ago may have a tax bill well below what a new buyer would pay, and that is one reason keeping the house can make financial sense.

Proposition 19 changed some of the long-term math. Hackard Law's summary notes that it expanded the ability of homeowners 55 and older to move their tax base to a replacement home anywhere in California. If you plan to use that benefit, ask a tax professional how keeping the old house instead of selling it affects whether you qualify. Gilfix's explanation of the law makes another point clearly: Prop 19 eliminated the parent-child exclusion for rental and investment property. If you plan to hold the Brentwood house and pass it on to your children someday, have an estate planning attorney review that plan before you sign a lease.

When Keeping It Tends to Make Sense, and When Selling Does

No formula answers this for everyone, but certain patterns come up often.

Renting often makes sense when the rent clearly covers the full cost of owning the house with money left over, when you have cash set aside for repairs, and when you are comfortable with the landlord rules described above.
Renting can also make sense when you expect to move back, or when your CPA has confirmed a clear plan to sell while you still qualify for the tax exclusion.
Selling often makes sense when you need the equity for your next purchase, when the numbers only work if nothing breaks, or when you are leaving the area and do not want to manage a house from far away.
Selling can also make sense when the home needs work that a tenant would notice right away, because you would pay for those repairs either way.

If you are still deciding, find out what the house would sell for today and what it would rent for today, using real nearby comparisons for both. Our Brentwood area page is a good place to start for local context. If the numbers point toward selling, our selling process page explains what a sale involves.

Talk It Through Before You Commit

Many of our clients start this conversation months before they move. That lead time gives you room to get answers on taxes, check the rent and price a possible sale before anything is final. If you own a home in Brentwood or elsewhere in East Contra Costa County and are deciding whether to rent it or sell it, we can work through the selling side of the comparison with you. We can also help you prepare better questions for your CPA. Contact The Mashore Group to start that conversation.