By Sternsmith Group
Burlingame's residential market has long attracted buyers who treat homeownership as a financial decision as much as a quality-of-life one. The tax framework governing California property ownership is among the most consequential parts of that calculation, and several provisions changed materially when the One Big Beautiful Bill Act went into effect.
From the mortgage interest deduction to Proposition 13 and the capital gains exclusion at sale, these benefits are substantial and worth understanding clearly.
Key Takeaways
- Mortgage interest deduction: Federal deduction applies to interest on up to $750,000 of mortgage debt for loans originated after December 15, 2017; California allows a broader deduction for some homeowners
- SALT cap raised to $40,000: The One Big Beautiful Bill Act raised the federal SALT cap from $10,000 to $40,000 for tax years 2025–2029, subject to phaseout for MAGI above $500,000
- Proposition 13: California caps property taxes at 1% of assessed value with annual increases limited to 2%, providing long-term cost predictability
- Capital gains exclusion: Section 121 allows single filers to exclude up to $250,000 of gain on a primary residence sale, and married couples filing jointly up to $500,000
The Mortgage Interest Deduction
For most Burlingame homeowners, the mortgage interest deduction is the most immediately impactful federal tax benefit — at Bay Area price levels, early mortgage interest payments are substantial, and deducting them can represent meaningful annual savings.
Key Rules for the Mortgage Interest Deduction
- Loan origination date matters: For mortgages taken out after December 15, 2017, the deduction applies to interest on up to $750,000 of mortgage debt; for loans originated between October 13, 1987, and December 15, 2017, the federal limit is $1 million
- California's broader deduction: California generally conforms to federal mortgage interest rules but does not fully adopt the $750,000 cap in all situations
- Discount points: Points paid on a purchase mortgage are generally deductible in the year paid; points paid to refinance must be deducted over the life of the loan
The deduction requires itemizing on the federal return; given Bay Area mortgage balances, many Burlingame homeowners will have sufficient deductible expenses combined with property taxes to make itemizing worthwhile.
The SALT Deduction and Proposition 13
The SALT deduction connects directly to Proposition 13, making it relevant for Burlingame homeowners evaluating their overall tax position.
How Proposition 13 and the SALT Deduction Work Together
- Proposition 13's 1% cap: Property taxes are capped at 1% of assessed value — for a home purchased at $2 million, the base annual tax is $20,000 before any locally approved bond measures
- The 2% annual limit: Annual increases in assessed value are capped at 2% regardless of market movements — a homeowner who bought in Burlingame a decade ago now has an assessed value substantially below the current market price
- SALT cap raised to $40,000: The One Big Beautiful Bill Act, signed July 4, 2025, raised the federal SALT cap from $10,000 to $40,000 for tax years 2025–2029 — significant for Burlingame homeowners whose combined state income and property taxes routinely exceeded the previous $10,000 ceiling
- MAGI phaseout: The expanded cap phases down for MAGI above $500,000, reducing by 30% of the excess above that threshold until reverting to $10,000 at approximately $600,000 MAGI for single filers
The tax benefits of owning residential property in Burlingame are closely tied to Proposition 13's long-term assessment protection.
The Capital Gains Exclusion at Sale
The Section 121 capital gains exclusion is one of the most significant federal tax provisions for California homeowners; in Burlingame, where homes purchased a decade ago have appreciated substantially, its value is difficult to overstate.
The Key Rules Governing the Exclusion
- Exclusion amounts: Single filers can exclude up to $250,000 of capital gain; married couples filing jointly can exclude up to $500,000
- The 2-out-of-5 rule: The homeowner must have owned and used the property as their primary residence for at least 24 months during the 5 years before the sale; months do not need to be consecutive
- California taxes the gain: California taxes capital gains at ordinary income rates up to 13.3% — a sale generating a large gain produces a state tax obligation even after the federal exclusion is applied
Gains above the exclusion thresholds, and California's full state tax on the gain, require planning in advance of any sale; homeowners who have rented the property face depreciation recapture considerations covered in the FAQs below.
FAQs
How does California's mortgage interest deduction differ from the federal version?
California generally conforms to the federal mortgage interest deduction but does not fully adopt the $750,000 loan limit. California's standard deduction is substantially lower than the federal one, meaning more homeowners benefit from itemizing at the state level; a California-licensed CPA can clarify how these rules apply to a specific situation.
How does Proposition 13 work for a homeowner who purchases in Burlingame today?
From the date of purchase, the assessed value is set at the purchase price, and annual increases are capped at 2% regardless of market movements. New construction can trigger reassessment on the improved portion, but the land retains its base year value. Over time, a homeowner who stays will see their effective tax rate relative to market value decline as prices rise faster than the 2% cap.
What happens to the capital gains exclusion if we rented the property before selling?
If a home was rented before becoming a primary residence, only appreciation during the primary-residence period qualifies for the exclusion. Depreciation claimed during a rental period is subject to recapture at sale at a maximum federal rate of 25%. Advance planning with a tax advisor is most important for homeowners who have moved between uses of the same property.
Contact Sternsmith Group Today
The tax benefits of owning residential property in Burlingame are one dimension of the broader financial picture. We understand this market in depth and work with clients through both the purchasing decision and the long-term ownership considerations that follow.
Reach out to us at the Sternsmith Group, and we will connect you with market expertise and, where appropriate, professional referrals that help our clients make fully informed decisions about Burlingame.
Reach out to us at the Sternsmith Group, and we will connect you with market expertise and, where appropriate, professional referrals that help our clients make fully informed decisions about Burlingame.
