Lafayette vs Rockridge, Oakland
Lafayette carries an effective property tax rate of 1.07% of assessed value and Rockridge, Oakland carries 1.36%, both for fiscal year 2025-26. On one identical reference loan the monthly carrying costs are $9,717 and $10,104 — $387 apart, with Lafayette lower. To Oakland City Center at AM peak the fastest published commutes are 22 min by BART from Lafayette and 12 min by BART from Rockridge, Oakland. Every figure is an objective public metric or arithmetic on one, and names its source.
Lafayette (Contra Costa County) · Rockridge, Oakland (Alameda County)
| Metric | Lafayette | Rockridge, Oakland | Difference |
|---|---|---|---|
| Median $/sqft (SFR) | $1,150 | $1,000 | +$150 |
| Effective tax rate | 1.07% | 1.36% | −0.290% |
| Monthly cost, reference loan | $9,717 | $10,104 | −$387 |
| FiDi SF (Montgomery St BART) — BART | 40 min | 25 min | +15 min |
| FiDi SF (Montgomery St BART) — Drive | 48 min | 35 min | +13 min |
| Oakland City Center (12th St BART) — BART | 22 min | 12 min | +10 min |
| Oakland City Center (12th St BART) — Drive | 27 min | 15 min | +12 min |
| Sunnyvale / Mountain View (Sunnyvale Caltrain) — Drive | 68 min | 70 min | −2 min |
Difference is Lafayette minus Rockridge, Oakland. Sources are cited on each submarket page.
Financed identically, Rockridge costs $387 a month more than Lafayette — $4,640 a year, all of it tax. Lafayette is modelled at 1.07% and Rockridge at 1.36%, which is the whole of the difference before either HOA or a district assessment is counted.
What the same money buys
Rockridge comps run $900-$1,000 per square foot; Upper Rockridge runs $1,000-$1,150. Against that, burton Valley and the Trail neighborhoods hold Lafayette's $1.4M inventory. At $1,150 and $1,000 per foot respectively, a fixed budget buys about 15% more floor area in Rockridge.
Carrying $1,600,000 in each
Holding the loan constant — $1,600,000, 20% down, 6.5% on a 30-year fixed, $2,400 of insurance, no HOA — Lafayette totals $9,717 a month at 1.07% and Rockridge $10,104 at 1.36% — tax lines of $1,427 and $1,813. Lafayette's surcharge is two overlapping parcel taxes rather than a CFD. Oakland library, parks, paramedic and school parcel taxes stack $800-$1,500 a year on a Rockridge parcel.
The trip each morning
To FiDi SF (Montgomery St BART): 40 minutes by BART from Lafayette, 25 by BART from Rockridge — a 15-minute edge to Rockridge, or 2.5 hours across a ten-trip week. To Oakland City Center (12th St BART): 22 minutes by BART from Lafayette, 12 by BART from Rockridge — a 10-minute edge to Rockridge, or 1.7 hours across a ten-trip week. From Burton Valley the Lafayette station is a 10-minute drive and its lot fills by 7:30 a.m. UC Berkeley is 10 minutes from Rockridge and Kaiser Oakland 8.
Hazard and insurance
Most of Lafayette outside the downtown flats is mapped High or Very High fire hazard. Upper Rockridge non-renewals are routine; FAIR Plan plus a wrap runs $5K-$9K. Verify any parcel against the CAL FIRE Fire Hazard Severity Zone map, the FEMA Flood Map Service Center and the California Geological Survey seismic hazard zones before removing contingencies.
Which search this actually is
Lafayette fits a need for a single-story house, a large lot and a short BART ride together. Rockridge is the answer when commute length is the binding constraint. Rank the requirements first; the pair rarely splits on anything except the one that is non-negotiable.
Sources. Tax figures come from Contra Costa TRA Book FY 2025-26; Alameda County Tax Rates by TRA FY 2025-26, composited in build/assets/metrics.json. They are county-level and not yet verified at the TRA, so the parcel's bill governs. Travel times are AM-peak door-to-door estimates from data/commute/static.csv. Price per square foot is a trailing median and is not an appraisal. Qualitative detail is the broker's own field observation.
Compare any two submarkets
| Metric | Lafayette | Rockridge, Oakland |
|---|---|---|
| Median $/sqft (SFR) | $1,150 | $1,000 |
| Effective tax rate | 1.07% | 1.36% |
| Monthly cost, reference loan | $9,717 | $10,104 |
| Fastest to FiDi SF (Montgomery St BART) | 40 min | 25 min |
| Fastest to Oakland City Center (12th St BART) | 22 min | 12 min |
| Fastest to Sunnyvale / Mountain View (Sunnyvale Caltrain) | 68 min | 70 min |
Same reference loan on both sides; the tax line is the only variable. Commute figures are door-to-door AM-peak estimates. Sources are listed on each submarket page.
Lafayette detail
| Component | Rate of assessed value |
|---|---|
| Prop 13 general levy | 1.000% |
| County / city voter-approved bonds | 0.012% |
| School district measures | 0.058% |
| Effective rate | 1.07% |
| Mello-Roos / CFD | None recorded |
Source: Contra Costa TRA Book FY 2025-26 (Contra Costa County), composited in
build/assets/metrics.json.
Tax Rate Area not yet verified parcel-by-parcel — confirm the rate on the parcel’s own tax bill.
Rockridge, Oakland detail
| Component | Rate of assessed value |
|---|---|
| Prop 13 general levy | 1.000% |
| County / city voter-approved bonds | 0.152% |
| School district measures | 0.208% |
| Effective rate | 1.36% |
| Mello-Roos / CFD | None recorded |
Source: Alameda County Tax Rates by TRA FY 2025-26 (Alameda County), composited in
build/assets/metrics.json.
Tax Rate Area not yet verified parcel-by-parcel — confirm the rate on the parcel’s own tax bill.
Lafayette vs Rockridge, Oakland: questions and answers
- Which has the lower effective property tax rate, Lafayette or Rockridge, Oakland?
- Lafayette, at 1.07% of assessed value against 1.36% for fiscal year 2025-26 — a gap of 0.290%. Rates are composited from county tax rate books; each parcel bill governs.
- How much do monthly carrying costs differ between Lafayette and Rockridge, Oakland?
- $387 per month on the identical reference loan: Lafayette $9,717, Rockridge, Oakland $10,104. Lafayette is lower. Principal and interest are held constant, so the difference is the tax line. Arithmetic only.
- Which has the shorter commute to Oakland City Center, Lafayette or Rockridge, Oakland?
- Rockridge, Oakland. Lafayette is 22 min by BART; Rockridge, Oakland is 12 min by BART. Door-to-door, AM peak. Source: data/commute/static.csv.
- What is the price per square foot difference between Lafayette and Rockridge, Oakland?
- $150 per square foot: Lafayette $1,150, Rockridge, Oakland $1,000. Single-family medians, trailing twelve months. A median is not a valuation of any specific property.