889 Francisco St #810

What this estimate rests on:

• A same-layout unit on another floor of this building, used as a ceiling and adjusted for the floor difference. A ceiling is “at most this much”, not “this much”.
• This unit’s own recorded sale, which is the strongest single piece of evidence there is.

How much weight we put on it: Low — one input only, or a ceiling only, or our inputs disagree with each other. Read the notes below before you decide anything.

Our own leave-one-out error is 5.98% at the median, 12.28% at the 75th percentile and 19.36% at the 90th. That error sits on top of every figure on this page, and on a large share of units it is wider than the gap itself.

• The only input is the same-line ceiling (#3710 fl.37 $691/sf). That is a ceiling, not an estimate — it says what this unit is worth at most, not what it is worth.
• Floor adjustment applied: The ceiling comes from floor 37; this unit is on floor 8, a 29-floor gap. Basis: the piecewise curve (1–7 measured at 2.1%/floor, 8–22 interpolated at 1.2%, above 22 measured at about 0). Ceiling reduced by 19%.
• ⚠️ This adjustment crosses the 8–22 floor band, where the floor premium is not directly measured. The value used is interpolated between the measured low-rise and high-rise figures, taken on the conservative side (the smaller deduction).
• The County's assessed value is within 5% of this unit's own most recent sale price. A real open-market sale is stronger evidence than any estimate we can produce — R&T §110 defines full cash value as the open-market price. So we do not claim this unit is over-assessed. That would take separate evidence that the market fell between the sale date and the lien date (1/1).

These notes are generated for this specific unit from County records and our own valuation inputs. If anything here does not match the unit, email [email protected].

• Everything above is an estimate. It is not an appraisal and not a promise about the outcome.
• The Assessment Appeals Board has the authority to raise the value, though never above the Proposition 13 protected value.
• A comparable sale must have been recorded no later than March 31, 2026. That is a hard rule on Form RP-87.
• Asking the Assessor for a review is free. You can do it yourself and you don't need us.

Parcel number 5144023102 · See other units in this building