Thinking About Leaving California? Know Your Walk-Away Number Before You Sell
Before you sell your San Diego home and move somewhere cheaper, figure out what you'll actually keep after the mortgage, selling costs, and taxes.
Quick answer: Before you sell your San Diego home and move out of California, figure out your walk-away number — the cash you actually keep after the mortgage payoff, the costs of selling, and any taxes. That number, not your Zillow estimate, tells you what your next life can look like.
Don't start with "What's my home worth?"
Most people thinking about leaving California start with the same question: "What's my San Diego home worth?"
A better question is: "What could my San Diego home turn into?"
If you've owned your home for 10, 15, or 20 years, there's a good chance you're sitting on a lot of equity you haven't used yet. And lately you may have caught yourself thinking:
- What if we cash out and leave California?
- What if we buy something cheaper somewhere else?
- What if we had no mortgage at all?
That's not a crazy idea. Plenty of San Diego homeowners are having this exact conversation right now. With the county median single-family home selling for about $1.09 million in early 2026 (San Diego Association of REALTORS®), a lot of long-time owners have built serious equity.
But before you start scrolling Zillow to see what $700,000 buys in Tennessee, Texas, or Arizona, there's one number you need to figure out first.
What is a "walk-away number"?
Your walk-away number is the money you actually leave with after:
- Your home sells
- Everyone gets paid
- Your taxes are handled
It's your real starting budget for your next move. And it's almost always smaller than the number you see on Zillow.
Why your Zillow estimate is the wrong number when leaving California
Let's say Zillow says your home is worth $1.3 million. That doesn't mean you have $1.3 million to start your next life with.
Here's what comes out first:
- Your mortgage payoff. Any loan balance (including a HELOC) gets paid off at closing.
- The cost of selling. Agent fees, escrow, title, county transfer tax, repairs, and staging add up — often several percent of the sale price.
- Capital gains taxes. If your home went up a lot in value, you may owe federal and California tax on part of the profit.
A few things can change how much tax you owe:
- What you paid for the home. A lower purchase price means a bigger gain.
- What you've put into it. Major improvements — a new roof, a remodel, an addition — can lower your taxable gain. Keep your receipts.
- Whether it's your main home or an investment. If it's your main home and you've owned and lived in it for at least 2 of the last 5 years, you can usually exclude up to $250,000 of gain if you're single, or $500,000 if you're married and file jointly. Investment properties follow different rules.
A simple example
Here's how the math might look for a long-time San Diego homeowner:
| Line item | Amount |
|---|---|
| Zillow estimate / sale price | $1,300,000 |
| Mortgage payoff | – $500,000 |
| Selling costs (about 7%) | – $91,000 |
| Estimated capital gains taxes | – $50,000 |
| Walk-away number | ≈ $659,000 |
That "$1.3 million" home turns into about $659,000 of real money to work with. Still a lot — but a very different plan.
Example numbers only. Your situation will be different — see the disclosure below.
What can your walk-away number do for you?
Once you know your real number, now we can have the fun conversation:
- Could you buy your next home with cash and have no mortgage?
- Could you work less or retire earlier?
- Could you buy some land and stretch out?
- Could you keep a big cushion in savings after you buy?
In other words: what can the equity you built in San Diego actually do for you and your life somewhere else?
Sometimes the right answer is "stay"
Here's the honest part. After you run the numbers, the answer might be: don't move.
You might look at your low mortgage rate, your lifestyle, your people, and those 72-degree sunny days — and realize you'd be nuts to give that up. That's a perfectly good answer too.
We're not interested in convincing anyone to leave San Diego. We're interested in helping the people who are already quietly wondering whether it actually makes sense.
Key takeaways
- Don't decide based on your Zillow estimate. It's not what you'll keep.
- Your walk-away number is what's left after the mortgage payoff, selling costs, and taxes.
- Your purchase price, improvements, and how you used the home all affect your tax bill.
- Plan your move around your walk-away number — cash purchase, early retirement, land, or a savings cushion.
- Staying put is a valid result. Run the numbers before you decide either way.
Frequently asked questions
How much will I walk away with if I sell my San Diego home?
Start with your expected sale price. Subtract your mortgage payoff, your selling costs, and any capital gains taxes. What's left is your walk-away number.
Do I have to pay capital gains tax when I sell my house in California?
Maybe. If it's your main home and you've lived there at least 2 of the last 5 years, you can usually exclude up to $250,000 of gain ($500,000 for married couples filing jointly). Investment properties follow different rules.
Is my Zillow estimate what my home will sell for?
Not necessarily. Online estimates are a rough starting point. A local agent can give you a pricing estimate based on recent comparable sales in your neighborhood.
Should I sell my San Diego home and move somewhere cheaper?
It depends on your walk-away number and your goals. For some people it means a paid-off home and early retirement. For others, the numbers show that staying is the smarter move.
Thinking about leaving San Diego?
Let's figure out your walk-away number together — no pressure, no pitch. Contact The GreenHouse Group and we'll run your real numbers so you can decide with confidence.
Disclosure: Educational and comparative purposes only. The GreenHouse Group Inc. (CA DRE #01859042 | NMLS #366847). Real estate and mortgage professionals, not CPAs, tax advisors, or attorneys. This content does not constitute formal real estate, tax, legal, or financial advice. Tax rates and assessments vary by state, county, and individual circumstances. Consult a qualified tax professional regarding your specific situation.