A three-unit building in Noe Valley, held by a mother for over thirty years and sold to her adult daughter for significantly less than market value: on paper, one of the simplest transactions in real estate. In practice, it carries almost every disclosure obligation of a normal sale, plus a federal gift-tax consideration that catches most families off guard.
Two areas trip up family sales more than anything else. Disclosures don't relax just because the buyer grew up in the house — California treats the seller's obligations as fixed regardless of who the buyer is. And gift-tax reporting quietly triggers whenever the sale price sits meaningfully below fair market value, whether the seller intended a gift or not. Neither is complicated once you know the rules. Both are easy to skip when the deal feels like a formality.
Why Family Sales Still Carry the Full Disclosure Load
California's disclosure statutes attach to the seller's knowledge and the property's condition, not to the buyer's identity — and the family-sale exemptions in the Civil Code are narrower than most people think. Transfers between spouses in a divorce settlement, co-owner buyouts, and transfers from a decedent's estate to an heir via a fiduciary are exempt from the Transfer Disclosure Statement itself. But a straightforward sale from a living parent to an adult child, or from a grandparent to a grandchild, gets no exemption. The seller signs the same forms and takes on the same liability if something material is left out.
The intuition that trips families up sounds reasonable: my kid grew up here, they know the water heater is old, why put it on paper? Because familiarity isn't documentation. Your daughter may know the water heater is old but not know that a neighbor filed a complaint about the shared fence in 2021, or that a bathroom addition was done without permits before she was born. And ten years from now, if she wants to refinance or sell, the disclosures you signed will be the record everyone reaches for.
And even when a transaction does fall under one of those narrow exemptions, the common-law duty not to conceal known defects still applies — the exemption removes the specific form, not the underlying obligation of honesty. Given that, most sellers who could legally skip the disclosures decide not to. The extra effort to complete them is minimal compared to the liability exposure of skipping and having something surface at closing or two years later.
A buyer who grew up in the house still needs the disclosures in writing. Familiarity isn't documentation.
The California Disclosures Your Family Buyer Still Needs
For any residential sale of one-to-four units in California, the disclosure package is largely the same regardless of the buyer's relationship to the seller.
Standard California Disclosure Package
- Transfer Disclosure Statement (TDS) — Civil Code §1102, the core seller disclosure
- Seller Property Questionnaire (SPQ) — the CAR-form supplement to the TDS
- Natural Hazard Disclosure (NHD) — earthquake, flood, wildfire zone reporting
- Federal Lead-Based Paint Disclosure — required for any property built before 1978
- Local point-of-sale items — vary meaningfully by city
For SF properties, that local layer includes the 3R Report (residential building records on file with DBI), water conservation compliance certification, and — for buildings that qualify — mandatory soft-story retrofit disclosures. Escrow can identify exactly what applies to your address, but flagging these early lets you schedule inspections and repairs before they hold up closing. FSBOTransact's flat-fee San Francisco service handles this in the first week rather than the last.
When a Below-Market Sale Becomes a Partial Gift
Many family sales are priced below what the market would bear. Sometimes intentionally — the seller wants to help. Sometimes because the numbers just settle where they settle in the conversation. Either way, the IRS treats the discount as a gift from seller to buyer, and the reporting consequences follow whether you called it a gift or not.
This makes the appraisal do double duty. In an arm's-length sale, an appraisal defends the price to a lender. In a family sale below market, the appraisal also establishes fair market value for tax purposes — because the gift amount is calculated as FMV minus the sale price. If your Bernal Heights property appraises at $1.5 million and you sell to your son for $1.1 million, you've made a $400,000 gift to him for federal reporting purposes.
That gift may or may not create actual tax owed, but it does require reporting once it exceeds the annual exclusion — which is why the number needs to be established with a real appraisal rather than estimated from public records or an online valuation tool. This is the moment to have a CPA involved, not to rely on your broker's judgment.
What Form 709 Actually Does — and Doesn't Cost You
Gifts above the annual exclusion trigger a federal filing requirement: IRS Form 709, the United States Gift Tax Return. The name sounds heavier than the reality is for most families.
The federal system provides each person a substantial lifetime exemption for gifts and estate transfers combined. Filing Form 709 in the year of a large family gift generally reduces your remaining lifetime exemption by the gift amount, but rarely produces cash tax owed at the time of transfer — most sellers are well under the lifetime cap. What it does produce is a paper trail. The IRS uses those filings to track cumulative lifetime gifts, and the numbers matter later when your estate is settled.
The mistake families make is not filing when they should. When a below-market sale creates a partial gift above the annual exclusion, the Form 709 requirement is not optional even when no tax is owed. Missing it can create problems years later that a two-hour CPA engagement at the time of sale would have prevented entirely.
Prop 19 in One Paragraph
California's Proposition 19 changed how the parent-child property tax exclusion works for real estate transferred within families. The rules are worth understanding in detail before you set a closing date — the primary-residence requirement and the filing deadlines can void otherwise-eligible claims. Because the specifics interact with your family's situation, working through them with a CPA before setting a closing date is worthwhile.
Paperwork Is What Lets the Relationship Survive the Transaction
The purchase agreement, the disclosures, the escrow file — all of it can look like overhead when everyone at the closing table trusts each other. That's exactly why it matters. The paperwork isn't there for today's transaction, when nothing feels ambiguous. It's there for two years from now when the son wants to refinance and the lender asks how the property was priced, or ten years from now when the daughter's spouse asks why the basis is what it is.
A full-service listing agent charges roughly 5% for a family sale in which no listing, no marketing, and no buyer search is needed. On a $1.5 million SF home that's about $75,000 to help you paper a deal you already made. FSBOTransact handles the CAR-form contract, the disclosure package, escrow coordination, and closing for a flat $6,000 — running on the same standard forms every California title company already uses.
Selling to a family member in San Francisco is straightforward when the sequence is right: establish FMV with an appraisal, deliver disclosures in writing, price the sale deliberately, and file the gift-tax reporting when it's triggered. What breaks family sales isn't the transaction itself — it's assuming that trust between the parties replaces the paperwork.
One caveat worth stating plainly: federal gift tax rules and California property tax rules interact in ways that depend on the specifics of your family situation, your property, and your other assets. Nothing in this article is a substitute for advice from a CPA and, where the structure is unusual, a real estate attorney.