311 Oak St #720
Higher is a better buy. 50 is "priced about right for what it is". The last step curves the raw advantage onto 0–100, so points stop being one-for-one at the extremes.
💵What this unit actually costs per month
42% of that payment is not the mortgage. The HOA fee alone is $66,120 over five years — money that buys you no equity. A calculator that defaulted the fee to zero would have quoted you $2,693.
Not FHA-approved. No 3.5%-down FHA financing on this unit, so the realistic floor is a 5%-down conventional loan ($21,250). Common for small associations and not a defect on its own, but it does remove FHA buyers from your resale pool.
Minimum realistic down payment here: 5% · verify on HUD's lookup
Rate is the Freddie Mac PMMS 30-year average for the week of 2026-08-20 — a national survey figure, not a quote. Tax, insurance and closing costs are estimates; your own Loan Estimate is the real number.
This building's HOA fees
🚩 Rising fast · +7.5%/yrReconstructed from 16 units of recorded sales at 311 Oak St — every recorded sale carries its HOA fee and date. No listing site shows this.
These dues climbed 43% in 5 years — about +7.5%/yr across 16 units of recorded sales, well above inflation. A rise this steep is a leading signal of a special assessment, a drained reserve fund, or an insurance shock. The listing never shows it; the building's documents are where the "why" lives.
🏢 Get this building's full reserve & assessment report — free →✅ Positives
- Best $/sf of 14 tracked in Jack London
- 24% below model fair value
- Upper floor (fl 7)
- In-unit W/D
⚠️ Cons
- HOA $1102/mo
- Only 1 bath
🚩 Red flags
- Very high HOA $1102/mo (full-service high-rise)
- Listed BELOW its 2014 sale ($435k) → value eroding
Photos
Price history (this unit)
- Aug 11, 2026 — Listed $425,000
- Dec 24, 2014 — Sold (Public Records) $435,000
Description
TRANSPARENT PRICING! Experience elevated urban living at Unit 720 in The Sierra, a modern condominium community in the heart of Jack London Square. Built in 2003, this distinctive loft-style residence offers approximately 1,211 square feet of thoughtfully designed living space, combining style, comfort, and flexibility. The main level features an open-concept layout filled with natural light from expansive floor-to-ceiling windows overlooking the serene pool area. Contemporary upgrades include bamboo flooring, quartz countertops, stainless steel appliances, and custom accent walls that add warmth and modern character.An additional bonus room provides a versatile retreat ideal for a home offi