Sunnyvale Property Rules That Affect Your Trust
The U.S. Census Bureau estimated Sunnyvale's population at 156,577 on July 1, 2025 (estimates base 155,607 for April 2020). The city sits between Mountain View, Los Altos, Cupertino, Santa Clara and the Bay, and its housing runs from Eichler tracts and mobilehome parks to newer mixed-use buildings near downtown. Several local rules change how a trust is funded here, and a few change what your successor trustee will find.
Sunnyvale's own transfer tax, read from the city code
Sunnyvale is a charter city, and charter cities can write their own transfer taxes. Sunnyvale has one: Chapter 3.08 of the Municipal Code, the "Real Property Transfer Tax of the City of Sunnyvale," on the books since 1967. Section 3.08.010 says the chapter is adopted under Part 6.7 of Division 2 of the Revenue and Taxation Code, the state's documentary transfer tax law. Section 3.08.020 taxes deeds by which realty "sold within the city" is conveyed, when the consideration, "exclusive of the value of any lien or encumbrances remaining thereon," is more than $100. The rate is 27.5 cents for each $500. Section 3.08.090 has the county recorder administer it under the same state law.
That wording decides the trust question. A deed of your own Sunnyvale home into your own revocable trust sells nothing, and a mortgage that stays on the house is not counted as consideration, so the deed owes no Sunnyvale tax. This is not true everywhere in Santa Clara County: the Clerk-Recorder lists San José, Palo Alto and Mountain View as cities that add a separate city conveyance tax of $1.65 per $500. Sunnyvale is not on that list. The California City Finance table effective December 1, 2025 shows Sunnyvale at $0.55 per $1,000 for the city and $0.55 for the county, $1.10 per $1,000 in all.
The tax does come back when the trust sells. If your successor trustee sells the house after your death for $1,994,916 with no loan assumed, that is 3,990 units of $500, and the county and city taxes together come to $2,194.50 on the escrow statement. It is a cost of selling, not of inheriting; a trustee who deeds the house to your children instead of selling it is handing it out under the trust, not selling it.
Below Market Rate homes carry a 30-year restriction
Sunnyvale's inclusionary housing law requires ownership projects of seven or more new homes or lots to include Below Market Rate (BMR) units (Municipal Code §19.67.030). The city's Home Buyer Programs page says BMR prices are restricted by the city, the program is run by the Housing Division, and current maximum prices run from $491,000 for a two bedroom home to $614,000 for four bedrooms. Buyers must be first-time buyers who meet income limits.
A BMR owner should plan the trust around Municipal Code §19.67.080. Before a building permit issues for a BMR unit, the property owner and the city record a declaration of restrictions that is "binding to the heirs, assigns and successors in interest of the property owner." The restrictions last 30 years, and a new 30-year term starts each time the unit is resold to another eligible buyer. The owner must live in the home as a primary residence, cannot rent it out except for a temporary rental the director allows on a finding of hardship, and cannot refinance without the director's written approval. "Certain transfers of title by marriage, divorce proceeding, devise or inheritance" are not subject to the required sale procedures, and the code defines an eligible buyer to include a household that acquires a BMR unit through devise or inheritance and meets the chapter's requirements to occupy it.
Three practical points follow. First, the chapter does not mention a deed into the owner's own revocable trust, so call the Housing Division at (408) 730-7250 before recording one and keep the city's answer with your trust papers. Second, the trust can name who inherits, but an heir who wants to live in the unit still has to qualify under the program; an heir who does not may end up selling at the restricted price. Third, your successor trustee should expect the city to be involved in any sale. A trust does not remove the deed restriction. It does keep the unit out of probate, so a sale needs the city's process but not a court order on top of it.
Mobilehomes are titled by the state, not recorded by the county
Sunnyvale has kept its mobilehome parks. The city's mobilehome page names parks including Fair Oaks, Fox Hollow, Rancho La Mesa and Willow Ranch, and the city keeps Mobile Home Exclusive zoning, in which land can generally be developed only as a mobilehome park, and has a Mobile Home Park Conversion Ordinance (Chapter 19.72). Since 2021 a city Memorandum of Understanding with park owners has governed annual rent increases and rent increases on sale of a home for residents who sign the city's lease addendum; the city lists Aloha, Ranchero and Thunderbird as rental parks outside the MOU.
For a trust, the important fact is that a mobilehome on a rented park space is usually not conveyed by a recorded deed. The California Department of Housing and Community Development (HCD) titles and registers it. A trust transfer deed recorded on West Tasman Drive does nothing for it. HCD has its own instructions for putting a mobilehome into a trust: the original HCD certificate of title signed off by every owner shown on it, with the trust's name in the new owner section; the last registration card; a Multi-Purpose Transfer Form (HCD RT 476.6G) signed by each trustee; and a $35 transfer fee. A home on local property tax, with a decal number starting with "L," also needs an original tax clearance certificate from the County Tax Collector, plus a $23 registration fee per section and a $5 park purchase fee per section unless you own the land. A home on yearly registration, with an "A" decal, pays renewal fees if registration expires within 60 days. If the title is lost, a duplicate costs $25.
The space lease is a separate matter. Your trust can own the home, but the park's lease and the MOU addendum set the terms on which your family can keep it on the space or sell it in place. Keep a copy of the lease and the signed addendum with the trust so the successor trustee can see what rent a buyer would pay.
Flood zones near the Bay
Sunnyvale runs north to San Francisco Bay, and FEMA has designated some areas of the city as Special Flood Hazard Areas, with at least a 1% chance of flooding in any year. The city says the current FEMA flood insurance rate maps are dated May 18, 2009, that every property in a Special Flood Hazard Area with a federally backed mortgage must carry flood insurance, and that its Community Rating System participation earns a 15% discount for policies in those areas. New flood policies have a 30-day waiting period.
When a house moves into a trust, tell the insurer that the owner is now you as trustee, for the homeowner's policy and for any flood policy. After a death, the successor trustee should check that the policies stay in force before doing anything else; a lapse in a flood zone cannot be cured overnight because of that waiting period. The city's Flood Zone Viewer shows the designation for a given address.
Older tract homes and title that was never updated
Southern Sunnyvale is mostly residential, and Wikipedia counts 16 tracts with more than 1,100 Eichler homes there. The city publishes Eichler Design Guidelines for remodels in those neighborhoods. In an older house bought by a couple, the deed on record may still show the vesting from the original purchase, such as husband and wife as joint tenants.
If one spouse has died and the deed shows joint tenancy or community property with right of survivorship, the survivor should clear title before funding the trust. Probate Code §210 lets a person record an affidavit of death, with a certified copy of the death certificate and a description of the property, in the county where the property sits. Once that is recorded, the trust transfer deed can move the house from the survivor to the survivor as trustee. Skipping the first step leaves the successor trustee two jobs instead of one, and a deceased owner still on title is exactly what a buyer's title company will ask about. Our page on joint tenancy versus a living trust compares the two forms of ownership.
Stock awards and pensions from Sunnyvale employers
The city's July 2025 Business and Community Profile lists Google, Apple, Amazon, Intuitive Surgical and Lockheed Martin Space Systems among the ten largest employers in Sunnyvale. Two kinds of assets come out of jobs like these, and a trust handles them differently. Vested shares in a brokerage account can be retitled to you as trustee or given a transfer on death beneficiary, so the trustee can manage them without a court order. A pension, 401(k) or IRA passes by its beneficiary form and should stay in your name; the trust is named only if you choose it on the form. Unvested awards follow the employer's plan, so keep the plan documents where the trustee can find them.
Proposition 19 at a Sunnyvale price
At Sunnyvale values the Proposition 19 numbers get large quickly. Suppose a parent's Sunnyvale house has a factored base year value of $400,000 and is worth Zillow's typical $1,994,916 when a child inherits it in 2026. If the child moves in and claims the homeowners' exemption within a year, the child keeps the parent's base plus the amount by which the market value exceeds that base plus $1,044,586 (the figure for transfers from February 16, 2025 to February 15, 2027). Here the excess is $550,330, so the new taxable value is $950,330. If no child lives there, the house is reassessed at full market value. This is a hypothetical to show the arithmetic; the trust decides who inherits, not how the house is taxed. Our Prop 19 inheritance guide covers the claim forms.
Federal estate tax is a separate question. For deaths in 2026 the federal basic exclusion is $15,000,000 per person, so most Sunnyvale households, even with a $2 million house, owe no federal estate tax. A revocable trust is not a tax shelter; its job is to keep the house and accounts out of probate.