May 2026 is the most recent data Redfin has published, since sales figures take time to compile after closing. Over the three months ending May 2026, Santa Clara County’s median sale price was $1,645,066, down 4.9% year over year. San 

Mateo County’s median reached $1,794,617, up 2.5%. San Francisco’s median hit $1,761,716, up 14.1%, reflecting continued demand from AI industry hiring alongside tight listings.

Inventory is the bigger issue. With months of supply well below balanced levels, buyers have few options to choose from, and much of what’s available needs work:

• Electrical panels that may not support modern appliance loads
• HVAC systems nearing or past their expected lifespan
• Kitchens and bathrooms that need updating before move-in

The hidden costs resale buyers often miss

The sticker price rarely tells the full story of an older home.

Major systems have a finite lifespan, and older homes are often near or past it. Roofs typically last 20 to 30 years, HVAC systems 15 to 25 years, and water heaters 8 to 12 years. Buyers should budget for one of these replacements soon after move-in.

Transaction costs add up fast, too. Selling a home in California typically costs 8-10% of the sale price in commissions and fees, or $160,000 to $200,000 on a $2 million home.

California’s insurance market adds real risk. Statewide, premiums rose 84% between 2020 and March 2026, and that figure predates an additional 29% FAIR Plan rate increase approved in April 2026, so current costs are likely even higher. Older homes with aging roofs or wildfire exposure often see the steepest increases.

Bidding wars remain common on homes that still need major system replacements.

What New Construction Actually Costs in the Bay Area In 2026

New construction follows its own cost structure. National averages don’t apply here.

Cost per square foot: real Bay Area numbers

Building a house in California costs $400 to $700 per square foot on average, with costs running higher in the Bay Area specifically. That compares with a national average of about $195 per square foot, including contractor fees, per NAHB data. 

Seismic engineering, strict energy codes, and permitting timelines all push Bay Area costs well above the national median.

For a 2,000-square-foot home, that translates to roughly $800,000 to $1,400,000 in construction costs before land.

What’s included as standard in a new Bay Area home

New construction in 2026 includes features that were once upgrades. These now come standard:

• Seismic safety built to current California codes
• Solar PV systems are required on nearly all newly constructed single-family homes under the 2025 Energy Code
• A dedicated 240-volt circuit in the garage for Level 2 EV charging
• Builder warranty coverage across fit and finish, systems, and structure

If You Already Own Land, The Math Changes Significantly

Owning a buildable lot changes the calculation. You skip the highest cost in Bay Area home buying: the land itself.

In Silicon Valley, land can cost 200-300% more than construction, especially in cities like San Jose, according to Home Builder Digest. Skip that cost, and the construction figures from above become your entire budget, not just part of it.

Compare that to buying an existing home in a similar neighborhood. In Los Gatos, for example, the median resale price sits at $2.4 million. Landowners building new homes often come in well under that mark, before even factoring in a new home’s lower maintenance costs and full warranty coverage.

This makes the build-versus-buy decision look very different for anyone who already controls a lot or a teardown property.

Total Cost Of Ownership: The Real Comparison

Sticker price is only part of the equation. Maintenance, energy, and resale value shift the math over time.

Maintenance costs: years 1 to 10

New construction keeps maintenance costs low early on. Systems are new, and warranties cover structural and system issues. Resale costs vary by age and condition, with roofs, HVAC, and water heaters as the biggest risks.

Energy efficiency and long-term utility savings

New homes built to Title 24 standards use significantly less energy than pre-1980 homes. Standard solar cuts electricity costs further in PG&E territory. Older homes often lack modern insulation and efficient HVAC systems, keeping utility bills higher throughout the home’s life.

Resale value and equity

New construction typically sells for more than resale homes of similar size. Nationally, the median new home price was about $14,600 higher than the median resale price in early 2025, per NAHB data.

Meanwhile, major remodels on older homes recoup only 38-50% of their cost at resale. Buyers pay a premium for modern systems, current code compliance, and full warranties, an advantage that holds especially well in a supply-constrained market like Silicon Valley.

Financing: How New Construction And Resale Compare

Financing looks different depending on which path you choose, and rates play a bigger role than most buyers expect.

The mortgage rate lock-in problem

According to Effective Agents, many resale sellers locked in rates well below 4% between 2020 and 2022. Buyers today face rates near 6% instead. Per FHFA research, each percentage point above a seller’s original rate cuts their odds of selling by 18.1%. This effect has started easing slightly in 2026, but it still constrains resale inventory across the Bay Area.

Financing options for new construction

Construction-to-permanent loans combine the build and the mortgage into one product. Down payments typically run 5%-20%, depending on the lender and borrower’s credit profile. Some builders also offer rate buy-downs or closing cost assistance that changes the monthly payment math.

AL Homes works with lending partners throughout the process, from land acquisition through move-in.

The AL Homes Advantage: What Fully Integrated Actually Means