In July 2026, the Santa Clara County Assessor's Office released the numbers on how much property value grew across the county in 2025. Every city gained ground. Sunnyvale led the pack at 7.17 percent. Los Altos and Palo Alto followed at 6.43 and 5.47 percent. The countywide average landed at 4.74 percent.
Mountain View posted 2.93 percent, the lowest of any city in the county, according to the assessor's July 6 report covered by San José Spotlight.
Read that number cold and it sounds like a market losing steam. It is not. In the same month that report came out, MLSListings data for Mountain View showed single-family homes closing at a median 106 percent of list price, in a median 24 days, against less than one month of active supply. That is not a cooling market. That is one of the tightest resale markets in the region, running at full speed while the tax roll tells a completely different story.
The gap between those two numbers is the actual story here, and it matters if you are trying to decide whether Mountain View is losing ground to Sunnyvale, Los Altos, or Palo Alto before you commit to a search there.
What the assessor's number is actually measuring
The county's assessed value growth is not a market indicator. It is a tax roll calculation governed by Proposition 13, which caps annual assessment increases at 2 percent or the rate of inflation, whichever is lower, unless a property changes hands or gets new construction. On top of that sits Proposition 8, which lets the assessor temporarily lower a property's assessed value when its market value drops below what is on the books, usually applied automatically or by owner request.
Neysa Fligor, the county assessor, pointed to a specific reason Mountain View trails the pack: the city has the county's highest share of commercial parcels, at 18 percent commercial against 82 percent residential. With the office market still under pressure, Prop 8 reductions on commercial buildings are pulling the city's combined roll down even as its homes hold their own.
"This greater reliance on a weakened commercial market likely contributes to Mountain View's comparatively lower rate of assessment growth, especially in recent years," Fligor said.
Countywide, Prop 8 temporary reductions totaled $9.4 billion in 2025, up $3.3 billion from the year before, with 24,727 properties in reduced-assessment status, nearly triple the prior year's count. That is an office market story. Mountain View just happens to carry more of that weight than its neighbors do, because it has more commercial square footage sharing the same tax roll as its homes.
| City | 2025 Assessed Value Growth |
|---|---|
| Sunnyvale | 7.17% |
| Los Altos | 6.43% |
| Palo Alto | 5.47% |
| Santa Clara County (overall) | 4.74% |
| Mountain View | 2.93% |
Fligor summed up the whole picture in five words: "We call it a mixed bag."
What buyers and sellers are actually seeing
Here is what the residential resale market looked like in July 2026, according to MLSListings, the multiple listing service that covers Santa Clara County transactions. Single-family homes carried a median sale price of just over $3 million, with only 18 active listings against 20 closed sales for the month, a months-of-inventory figure of 0.8. Homes sold at a median 106 percent of list price in a median 24 days on market.
A monthly sample of 20 closed single-family sales is small enough that a couple of high-end transactions can swing the median significantly in either direction. That volatility cuts the same way as the assessed-value confusion. A single headline number, whether it comes from the tax assessor or from one month of closed sales, rarely tells you what is actually happening at the price point you care about.
The condo and townhome segment told a steadier story that same month: a median sale price near $1.45 million, 53 active listings, and a median 14 days on market. That is a meaningfully wider entry point than the detached home market, and it is where a lot of first-time buyers looking at Mountain View end up focusing.
The ZIP code split hiding inside the citywide number
Mountain View's own geography adds another layer. Late 2025 ZIP-level data showed a median sale price near $2.12 million in 94041, versus roughly $1.38 million in 94040 and $1.26 million in 94043. That is close to an $860,000 spread inside one city, driven by differences in lot size, housing stock, and proximity to downtown Castro Street versus the areas closer to Highway 101.
If you are cross-shopping Mountain View against another city, the citywide median is close to useless for that comparison. The number that matters is the one that matches your ZIP code and your property type, single-family against single-family, condo against condo, not blended against blended.
Why North Bayshore won't loosen this market anytime soon
Anyone who has read about Mountain View's housing pipeline has probably come across Google's North Bayshore Master Plan, approved by the city council in June 2023. The plan covers 153 acres north of Highway 101 and includes a tentative map creating 37 new parcels, among them 7,000 condominium lots, alongside 3.1 million square feet of office space and more than 26 acres of parks. It is the largest development ever approved in the city's history, and it runs on a 30-year development agreement.
Thirty years is the operative detail. This is not a supply pipeline that eases competition for today's buyers. As of mid-2026, no housing construction has broken ground at North Bayshore itself. The one project that did break ground downtown this year is Corso, a five-story, 120-unit affordable housing development at 444 Bryant Street, built by Alta Housing and Related California on a former city parking lot, with a groundbreaking celebration held May 27, 2026. That project sits downtown, not in North Bayshore, and it is income-restricted affordable housing, not market-rate resale inventory.
Corso is one of five affordable developments the city has scheduled to begin construction or reach completion in 2026, alongside Montecito, La Bella, 87 E. Evelyn, and 96 W. El Camino. Together the five are expected to add 553 affordable units citywide, a roughly 30 percent increase over the city's existing affordable housing stock. None of that changes the math for someone comparing detached home prices in 94041 against Sunnyvale or Los Altos this year. If you are holding off on a Mountain View search because you expect North Bayshore to bring relief, that relief is measured in decades, not the next housing cycle.
What this actually means if you're deciding between cities
The lesson here is not that Mountain View is secretly stronger than it looks, or that the assessor's number is wrong. Both numbers are accurate. They are just measuring different things. The assessed value growth rate tells you about the combined tax roll, weighted by a commercial office market that is struggling across the Bay Area. The resale market tells you what an actual buyer paid for an actual home last month.
If you are weighing Mountain View against a neighboring city on the strength of a headline about slower value growth, that headline is not describing what you would pay to buy a house there, or what you could expect to sell one for. It is describing an accounting artifact of Mountain View's parcel mix. The residential market underneath it, judged by sale-to-list ratios, days on market, and months of supply, is behaving like one of the tighter markets in the county, not a softer one.
If you're trying to make sense of what a specific ZIP code, price band, or property type in Mountain View actually looks like right now, that's a conversation worth having before you commit to a search or a listing price based on a citywide average. Team NL Homes can walk through the comps that match your situation and help you read the numbers that actually apply to your decision. Schedule A Consultation to get started.
A short FAQ
Does slower assessed value growth mean my home's resale value is weaker? No. Assessed value under Proposition 13 and Proposition 8 is a tax basis tied to the county's roll methodology, not a market appraisal. Your home's resale value is set by comparable sales, not by the assessor's growth percentage.
Should I wait for North Bayshore to add housing supply before buying? Not if you are buying in the next few years. The North Bayshore Master Plan runs on a 30-year development agreement, and no housing construction has started there as of mid-2026. The only project that broke ground this year, Corso, is downtown affordable housing, not market-rate resale inventory in North Bayshore.
Is Mountain View cooling compared to Sunnyvale or Los Altos? Not by the evidence in actual home sales. The assessed-value gap traces back to Mountain View's higher share of commercial parcels and a weak office market, not to softer residential demand. July 2026 MLS data showed homes still selling above asking with less than a month of supply.
Which ZIP code numbers should I actually compare? Match ZIP code to ZIP code and property type to property type. Mountain View's 94041, 94040, and 94043 carried medians that differed by hundreds of thousands of dollars in late 2025, so a citywide figure will not tell you what a home in your target area is actually trading for.
