In September 2026, a Sunnyvale single-family home sold in an average of 10 days for 107% of its list price. A Sunnyvale condo or townhome took an average of 40 days and got 102%. Both kinds of home sit in the same city, near the same employers, with the same Caltrain access. The gap comes from who else is selling. The owner of a resale townhome is competing with national homebuilders that can offer a year of paid HOA dues and a bought-down mortgage rate. The owner of a house is competing with almost nobody.
A year in which one market sped up and the other slowed
The Santa Clara County Association of Realtors monthly statistics show how far the two segments moved apart between September 2025 and September 2026.
| Sunnyvale, September | Single-family 2025 | Single-family 2026 | Condo/townhome 2025 | Condo/townhome 2026 |
|---|---|---|---|---|
| Median price | $2,691,500 | $2,820,000 | $1,350,000 | $1,250,000 |
| Average days on market | 19 | 10 | 29 | 40 |
| % of list price received | 106% | 107% | 102% | 102% |
| Median $/sq ft | $1,539 | $1,653 | $894 | $888 |
| Active inventory | 36 | 41 | 57 | 63 |
The house median rose about 4.8% over those twelve months, and its median price per square foot rose about 7.4%. The condo and townhome median fell about 7.4%, but its price per square foot barely moved. Part of that drop in the median comes from which units happened to close. With only 25 attached-home sales in September 2026, a few smaller condos can pull the median down. Per square foot, the attached segment was flat for the year. Over the same year, houses picked up about $114 a square foot and became nearly twice as fast to sell.
September was no fluke. In the SCCAOR reports for July 2026 and August 2026, Sunnyvale's condo and townhome inventory was 65 and then 63 listings, with average market times of 36 and 32 days. House market times fell from 20 days in July to 13 in August and then to 10 in September. In September, Sunnyvale closed 53 house sales against 41 active listings, so more houses sold that month than were left on the market at the end of it.
The resale seller's real competitor has a sales center
Someone shopping for an attached home in Sunnyvale this fall can choose between a neighbor's resale unit and new inventory from three builders that are actively selling.
- Toll Brothers, The Station. Two collections with a sales center at 306 Tea Tree Terrace. Outlook condos are advertised from $999,000 and Terraces from $1,479,000. The Sunnyvale page listed eight quick move-in homes in mid-October.
- Pulte Homes, The Square. At 1139 Karlstad Drive. Apollo condos are listed from $1,189,990 and Artemis townhome-style condominiums from $1,569,990, with nine plans and four quick move-in homes shown in mid-October.
- Homes Built for America, Vida. A townhome collection with a sales gallery at 176 East Fremont Avenue. Its community page markets it as a "final opportunity," with prices from $1,599,000.
Those price floors span the same range as Sunnyvale's resale condo and townhome median of $1,250,000. A buyer at that budget can tour a 15-year-old unit on Saturday morning and a model home with a builder's sales team that afternoon.
What a builder can put on the table
Price is only part of the competition. In mid-October, The Station's community page advertised a promotion "Extended Through October 25." It offered one year of HOA dues with a purchase on select home sites, plus a 4.75% first-year rate, 7.39% APR, on a jumbo 5/1 ARM with a 2/1 buydown on select homes. By the time many readers see this, that particular deadline may have passed. The mechanism it shows will last longer.
A builder selling dozens of units can spread the cost of a rate buydown or a year of dues across a whole project and its marketing budget. A homeowner selling one townhome can offer a credit, but it comes straight out of their own proceeds, and they are trying to match an offer designed by a company whose business is moving inventory. When a buyer compares a resale listing with a new unit that carries a lower first-year payment and no dues for twelve months, the resale price has to make up the difference. A seller can't easily make it up any other way.
Builder pricing also moves. When Toll Brothers announced Outlook's model homes in a June 8, 2026 release, it gave the starting price as the upper $800,000s. The community page now lists Outlook from $999,000. A "from" price shows the least expensive unit still available. It is not an index of value. A resale seller pricing against a builder needs to compare specific floor plans, not headline numbers.
Why the house seller faces none of this
No builder in Sunnyvale is marketing new detached houses at scale with paid dues and buydowns. In a built-out city, a house buyer chooses among existing owners who decided to sell this month, and in September there were 41 of them.
Demand nearby is holding up. The Mercury News reported on October 16 that Sunnyvale's office vacancy fell to 8.4% in the third quarter of 2026 from 9.8% in the second, below Mountain View at 12.9% and Santa Clara at 12.5%. The same report said Google renewed 2.1 million square feet across its Sunnyvale locations, and Amazon and HPE each leased roughly 318,000 square feet locally. Steady employer commitments push buyers toward the segment where supply cannot grow, and their effect on the attached segment is diluted by new construction.
How Sunnyvale compares with its neighbors
The same pattern helps explain where Sunnyvale sits among nearby cities. These are the September 2026 SCCAOR figures:
| September 2026 | SF median | SF avg. days | SF % of list | Condo/TH median | Condo/TH avg. days | Condo/TH inventory |
|---|---|---|---|---|---|---|
| Sunnyvale | $2,820,000 | 10 | 107% | $1,250,000 | 40 | 63 |
| Mountain View | $3,020,000 | 20 | 109% | $1,475,000 | 30 | 57 |
| Santa Clara | $1,817,000 | 20 | 105% | $750,000 | 34 | 59 |
| Cupertino | $3,210,000 | 14 | 106% | $1,550,000 | 14 | 24 |
Sunnyvale had the fastest house market of the four and the slowest attached market. Its 40-day condo and townhome average is close to the countywide figure of 42, so the attached segment is behaving normally. The single-family side is the outlier. Cupertino had only one condo or townhome sale in September, so its attached figures say very little.
The next wave is already approved
Attached-home competition is not winding down. On August 24, 2026, the Sunnyvale Planning Commission passed an item for City Ventures and Fortinet's project at 1484 Kifer Road. It covers 137 for-sale townhome-style condominiums, 28 of them moderate-income units, and 129 of the 137 homes have three bedrooms. The city record gives no delivery date. Three-bedroom townhomes are the product most likely to draw a family buyer who might otherwise stretch for a small house. So the next round of competition will land on the larger resale townhomes, the ones whose owners have so far had the strongest argument for pricing close to the bottom of the house market.
What this means for each side of the table
For a buyer weighing a Sunnyvale townhome. You have more leverage than the city's overall numbers suggest. Sixty-three active listings and 40-day average market times mean you can usually compare resale units with builder inventory side by side. The useful comparison is total cost in the first year and the first five years: purchase price, HOA dues, rate structure and any credits. Comparing list prices alone misses most of that.
For a buyer weighing a Sunnyvale house. With 10-day average market times and 107% of list received in September 2026, preparation counts for more than negotiating. Inspections, financing and a firm sense of value need to be ready before the house you want goes on the market.
For a Sunnyvale townhome owner thinking of selling. Price against the three builder communities as well as against recent resale closings, because that is the comparison buyers are making. Timing also matters. Builder promotions run on deadlines, and a listing that goes live in the same weeks as an aggressive builder sales event is up against the strongest version of the competition.
Rate buydowns, HOA dues and seller credits involve lending and contract terms that differ from one transaction to the next. This post is general market information, not financial or legal advice, so confirm the details of any offer with your lender and your own advisors.
Questions buyers and sellers ask about this split
Did Sunnyvale condo values fall over the past year? The median fell from $1,350,000 in September 2025 to $1,250,000 in September 2026. Median price per square foot went from $894 to $888, which is nearly flat, so much of the drop in the median reflects which units closed.
When will October 2026 figures be available? As of mid-October, September 2026 was the latest month listed on its statistics page.
Is new rental housing part of this competition? Mostly no. Projects such as Ira D. Hall Square, which Santa Clara County announced opened on October 13 near Lawrence Caltrain with 176 affordable rental apartments, add homes for renters. They don't add homes for sale.
If you own a Sunnyvale townhome and want to know how your floor plan compares with what The Station, The Square and Vida are offering this season, The Balakrishnan Group can put together a side-by-side comparison of price and first-year cost before you set a list price. Request a Confidential Consultation.
