Silicon Valley, California Homeowners Trapped by Outdated Capital Gains Exclusion

Written by:

Rudi Davis

Date:

29 Mar 2026

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Silicon Valley’s housing shortage is not solely a product of high construction costs or zoning restrictions. Linda Baker, founder of Milestone Realty in Silicon Valley, California, points to an overlooked factor: the federal capital gains exclusion, which has remained unchanged for 23 years. This policy is trapping aging homeowners in properties they cannot maintain or navigate, keeping homes off the market until the owners die.

“The capital gains exclusion has been the same since I started in real estate,” Baker says. “It’s $250,000 for a single person, or $500,000 for a married couple. That worked 25 years ago, but not now in Silicon Valley.”

With the median home price near $2 million in Silicon Valley, the outdated exclusion imposes a significant tax penalty on longtime owners. Homeowners who bought decades ago and have seen their homes appreciate face capital gains bills that could reach hundreds of thousands of dollars if they sell. Many choose to stay, even as the property becomes a burden.

Silicon Valley Seniors Trapped by Appreciation

A growing number of older homeowners face two difficult options: sell and pay substantial taxes, or remain in homes that are now physically or financially unmanageable. Baker says, “We have people who are stuck in houses they’ve aged in, and now can’t afford to maintain. Some can’t manage stairs anymore, but selling would mean a huge tax hit.”

This problem is especially acute in Silicon Valley, California, where home values have risen far beyond the national average. An owner who bought for $400,000 in the early 2000s might now hold a $2.5 million home. After applying the $500,000 exclusion for a married couple, they could owe capital gains taxes on $1.6 million in appreciation, a bill that can exceed $300,000 depending on their tax bracket.

For retirees on fixed incomes, that tax liability can consume a large share of their equity, leaving less to buy a smaller home or pay for care—many delay selling, sometimes indefinitely.

Tax Policy Freezes Silicon Valley Inventory

The result is an artificial inventory freeze. Instead of selling when their needs change, many homeowners wait until death. At that point, the property passes to heirs with a stepped-up basis, wiping out the capital gains liability. “If we allowed that inventory to come to market without penalizing people on taxes, homes would sell when people are ready to move,” Baker says. “Instead, they’re waiting until someone dies.”

This dynamic intensifies Silicon Valley, California’s inventory shortage. The region already faces limited new construction and high land costs. When existing homeowners hold their homes for tax reasons, the shortage worsens. Buyers face fewer choices, and the lack of available homes pushes prices higher.

According to Baker, the average holding period for homes in Silicon Valley, California, is now 18 years, more than double the national average of seven years. While some of this reflects the area’s strong job market and quality of life, Baker says tax policy is a significant factor keeping homeowners in place longer than they would otherwise choose.

Frozen Inventory Hurts Market Efficiency

This inventory freeze does not just tighten supply. It undermines market efficiency by preventing homes from reaching the people who need them most. A four-bedroom home occupied by a single elderly resident is mismatched to both the owner’s needs and the broader market. Younger families who could use the space are excluded because the tax code discourages these transactions.

Agents cannot ethically advise clients to sell if the resulting tax bill would cause financial harm. Properties stay off the market even when both the homeowner and potential buyers would benefit from a sale.

Some homeowners attempt to work around the problem by renting out rooms or taking reverse mortgages to access equity without selling. These strategies offer temporary relief but do not address the underlying issue. The home remains with someone who cannot fully use or maintain it, and the inventory problem persists.

Policy Reform Could Unlock Inventory

Baker argues that updating the capital gains exclusion to reflect inflation and current home values would release significant inventory. If the exclusion were doubled to account for inflation since its establishment, many more homeowners could sell without facing punitive tax bills.

Such a policy change would likely prompt a wave of sales from homeowners who have been waiting for relief. The resulting increase in inventory would give buyers more options and could help moderate price growth in markets where appreciation has far outpaced income growth. It would also allow aging residents to move into more suitable housing without surrendering a large portion of their equity to taxes.

Whether policymakers will address the issue remains an open question. The capital gains exclusion affects a specific group: homeowners in high-value markets who have held their properties for many years. This group lacks the political visibility of first-time buyers or renters, and the issue often escapes legislative attention.

Meanwhile, Silicon Valley’s housing market in California continues to operate under an artificial constraint. Homes that should be selling to new families remain frozen, and the tax code intended to support homeownership now discourages it precisely when flexibility is most needed. As long as the exclusion remains unchanged, the region’s housing shortage will persist. The problem is not a lack of homes, but a policy that keeps them out of reach.