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Featured local agent — Port Costa, CA
Sarah Mitchell
Compass Real Estate · Port Costa, CA
“Your trusted relocation specialist since 2009. 350+ homes sold. Zero-pressure, data-first approach.”
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Port Costa, CA Housing Market
The typical home in Port Costa, CA is worth $665,550, fell 0.7% over the past year (Zillow Home Value Index, July 2026). The last median sale price Redfin published was $713,000 (through May 2026). With homes going under contract in about 14 days, Port Costa is a leaning buyer's. At today's 6.66% 30-year fixed rate, 20% down on a $665,550 home is about $3,422/mo in principal and interest.
Key numbers for Port Costa, CA
Typical home value
$665,550
-0.7% in 12 months
Zillow, July 2026
Median sale price
$713,000
Last published period
Redfin, through January 2026
Days on market
14
Fast-moving
Redfin, through January 2026
30-yr fixed rate
6.66%
Freddie Mac weekly average
Freddie Mac via FRED, August 2026
Sale-to-list ratio
89.7%
Selling below asking
Redfin, through January 2026
Zillow figures are as of July 2026 and refresh monthly. Redfin figures are through May 2026 — Redfin stopped publishing its public market trackers in June 2026, so those numbers are final, not current. Mortgage rates come from Freddie Mac via FRED and update weekly.
Is Port Costa a buyer's or seller's market?
Port Costa, CA is a leaning buyer's and homes selling in about 14 days. We classify markets from months of supply, sale-to-list ratio and days on market together — no single number decides it.
Inputs are Redfin's final published period (May 2026). How we classify markets · Where the data comes from
What does the Port Costa housing market data show?
Every row below is Redfin's final published month for Port Costa, CA. Redfin, through January 2026
| Metric | Value |
|---|---|
| Median sale price | $713,000 |
| Median price per sq ft | $353/sq ft |
| Median days on market | 14 days |
| Sale-to-list price ratio | 89.7% |
| Homes sold (that month) | 1 |
| Market condition | Leaning buyer's |
How to read these numbers
- Median sale price
- Half the homes that closed sold for more than this, half for less. It moves with what kind of home sold that month, so a quiet month with two big sales can swing it. Redfin's figure for Port Costa is frozen at May 2026.
- Typical home value (ZHVI)
- Zillow's estimate of what a mid-market home in Port Costa is worth right now, whether or not it sold. It is smoother than the median sale price and it still refreshes monthly, which is why this page leads with it.
- Months of supply
- How long it would take to sell every active listing at the current pace. Under 3 favors sellers, over 6 favors buyers, and 3 to 6 is the balanced band.
- Days on market
- Median time from listing to accepted offer. Short means you should have financing ready before you tour; long means there is room to negotiate on price and repairs.
- Sale-to-list ratio
- Sale price divided by the last asking price. Above 100% means bidding above asking is normal here; below 100% means the typical buyer got a discount.
- Price per square foot
- The size-adjusted price. Use it to compare a 1,400 sq ft house to a 2,600 sq ft house, not to value your own home — lot, condition and age move it a lot.
- Listings with a price cut
- Share of active listings that dropped their asking price in the month. A high share is the earliest visible sign that sellers are ahead of what buyers will pay.
- Typical asking rent (ZORI)
- Zillow's repeat-rent index for asking rents on new leases. Paired with the home value it gives the price-to-rent ratio in the rent-vs-buy section below.
How have Port Costa home prices moved?
Across the 10 months we hold for Port Costa, CA, the median sale price rose 18.8%, from $600,000 in December 2021 to $713,000. The live Zillow value series has fell 0.7% in the last 12 months, which is the more current read now that Redfin's series has stopped.
Redfin, through January 2026 — the chart ends at Redfin's final published month.
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What does it cost to buy a home in Port Costa?
Priced off the typical home value of $665,550 at the current 6.66% 30-year fixed rate. These are principal and interest only — property taxes, homeowner's insurance, HOA dues and mortgage insurance are on top, and they vary enough by property that we will not guess them for you.
| Down payment | Cash at close | Loan amount | Monthly P&I |
|---|---|---|---|
| 20% | $133,110 | $532,440 | $3,422/mo |
| 5% | $33,277 | $632,272 | $4,063/mo |
Zillow, July 2026 for the price · Freddie Mac via FRED, August 2026 for the rate
What income do you need?
Lenders generally want housing costs under 28% of gross income. On the 20%-down payment of $3,422, that implies roughly $146,640 a year before you add taxes and insurance. We do not hold a Census income figure for Port Costa, so we cannot compare that threshold to local earnings.
Run it with your own numbers: affordability calculator · mortgage calculator
Buying in Port Costa in the next 12 months?
Tell us your timeline. We send the Port Costa market brief: the price ranges that actually clear, how long homes sit, and what to fix on your credit before you apply.
Is it cheaper to rent or buy in Port Costa?
Zillow does not publish a rent index (ZORI) for Port Costa, CA, so we cannot compute a price-to-rent ratio here without borrowing a nearby market's rents and calling them local — which we will not do. The rent vs. buy calculator works with a rent figure you supply.
Is inventory rising or falling in Port Costa?
Active listings in Port Costa, CA went from 1 in February 2025 to 1 in July 2025, a +0.0% change. Inventory has been roughly flat, which usually keeps prices moving with rates rather than with local supply.
| Month | Active listings | New listings |
|---|---|---|
| February 2025 | 1 | not published |
| April 2025 | 1 | 1 |
| July 2025 | 1 | 1 |
Redfin, through July 2025
How does Port Costa compare to California and the U.S.?
Port Costa homes sell for $713,000 — 20% below the California median of $887,400. Against the national median of $410,700, Port Costa runs 74% higher.
| Market | Median sale price | YoY | Days on market |
|---|---|---|---|
| Port Costa, CA | $713,000 | not published | 14 days |
| California statewide | $887,400 | +3.4% | 33 days |
| United States | $410,700 | not published | not published |
City and state rows: Redfin, through January 2026 · U.S. row: Freddie Mac via FRED, April 2026 (MSPUS, quarterly)
What to do next in Port Costa
What buyers should watch
- The gap between 5% and 20% down here is $642 a month in principal and interest alone, before mortgage insurance. That gap, not the price, is usually what decides your timeline.
- Rate moves. At 6.66%, every full point of rate change moves the payment on a $665,550 home more than a 5% price change does.
- Your credit tier before you shop, not after — it sets the rate you are quoted. Run your numbers first.
What sellers should know
- The median Port Costa listing goes under contract in 14 days. If yours passes that mark, the market is telling you the price is wrong — not that you need more showings.
- Homes here close at 89.7% of asking. Price to that ratio from day one rather than chasing the market down in cuts.
- Your equity moved -0.7% in the last 12 months on the Zillow value series. That, not the price you paid, is what sets your net proceeds.
- Comparable ZIP-level pricing inside Port Costa varies more than the citywide median suggests — check the ZIP pages below before you set a number.
Homes for sale in Port Costa
Explore homes currently listed for sale in Port Costa, California across major real estate platforms.
How much do homes cost in Port Costa by property type?
How the Port Costa, CA market breaks down across single-family homes, condos and townhouses. Redfin, through January 2026
| Property type | Median price | Price / sq ft | Homes sold | Days on market |
|---|---|---|---|---|
| Single-family | $713,000 | $353/sq ft | 1 | 14 days |
Who lives in Port Costa?
American Community Survey estimates for Port Costa. U.S. Census ACS, 2023
Population
194
Households
144
Median age
68.5 years
Owner-occupied
35.4%
Median home value
$586,500
35.4% of occupied homes in Port Costa are owner-occupied, and the rest are rented — which is the share that decides how much of the local housing stock ever reaches the for-sale market. The Census self-reported median home value is $586,500 against Zillow's $665,550 typical value; the gap is normal — ACS asks owners what they think their home is worth, Zillow models transactions.
Which cities are near Port Costa, CA?
Ordered by distance from Port Costa, not by size. Compare Port Costa side by side with any of them.
Port Costa housing market FAQ
Is Port Costa a buyer's or seller's market?
Port Costa, CA is currently a leaning buyer's based on the supply, pace-of-sale and sale-to-list data we hold for this city. Redfin's public market tracker last published in May 2026, so this classification will not move until a new source fills that gap.
How much do homes cost in Port Costa?
The typical home in Port Costa, CA is worth $665,550 (Zillow Home Value Index, July 2026). The median sale price in the last month Redfin published was $713,000, about $353 per square foot.
Is Port Costa cheaper than the rest of California?
Port Costa's median sale price of $713,000 is 20% lower than the California statewide median of $887,400, and 74% above the U.S. median of $410,700. Both figures are for the same period.
How long do homes take to sell in Port Costa?
Homes in Port Costa, CA spent a median of 14 days on market before going under contract, versus 33 days statewide. Under three weeks means well-priced listings move before most buyers can schedule a second showing. (Redfin, through May 2026.)
What income do you need to buy a home in Port Costa?
At the current 30-year fixed rate of 6.66%, 20% down on a $665,550 home is about $3,422 a month in principal and interest. Lenders typically want that under 28% of gross income, which works out to roughly $146,640 a year before taxes, insurance, HOA dues or mortgage insurance.
Are home prices rising in Port Costa?
The typical home value in Port Costa, CA fell 0.7% over the last 12 months, from $670,025 to $665,550 (Zillow, July 2026). This is the live series — it refreshes monthly.
What are the cheapest ZIP codes in Port Costa?
Port Costa ZIP-level sale prices are not all published for the same period, so ranking them would compare different months. The ZIP pages listed on this page show what we hold for each one individually.
Is now a good time to buy in Port Costa?
That depends on your timeline, not on a headline. What the data says today: Port Costa, CA is a leaning buyer's, the 30-year fixed rate is 6.66%. Properties Incorporated publishes the data; it does not give financial advice.
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