Skip to content
Skip to content
TopHapOpen in map
CondominiumResidential
Last sold for $700,000 on Nov 14, 2018

829 21ST ST

OAKLAND, CA 94607
0.21 ac
Lot SizeThe size of the land the home sits on, from county records.
2009
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
1
ParkingThe number of parking spaces on the property, including the garage.
Built 20094 units1,308–1,546 ft²
$2.5M
All units combinedThe sum of our current value estimates for every unit in the building — roughly what the whole building's homes are worth together.
$672K
Median unit valueThe middle unit value in this building by our estimate: half the units are worth more, half less.
$471
Median $/ft²The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.

+20.8%vs the Oakland ZIP median sale $/ft² ($390)

Sales Performance

$735K
Median sale (12 mo)The middle sale price among this building's units that sold in the last 12 months, from recorded deeds.
+1.7%
1-yr changeHow the building's median sale price over the last 12 months compares with the 12 months before that.
2
Sales (12 mo)Units in this building that sold in the last 12 months, from recorded arms-length deeds.
50.0%
Turnover (12 mo)The share of units that changed hands in the last 12 months. Around 4–6% a year is typical; much higher can signal investor churn or a wave of exits.
This building's own appreciationThe building's own appreciation: for every unit that sold twice (held over a year), we compute its yearly price change between the two sales and take the middle value. This is the cleanest read on how this specific building performs, because it compares each unit to itself.
+5.3%per yeartypical hold 11.1 yrsfrom 7 same-unit resales
Median sale price (yearly, all time)Every recorded arms-length sale in the building since records begin, grouped by year: the bars count sales and the line tracks the median price paid.MedianSales
20062009201020112018202120242026
Sale price per ft² (yearly, all time)The middle price per square foot across the building's units, by our current estimates. Useful for comparing units of different sizes.$/ft²
20062009201020112018202120242026

12 arms-length sales on record for this building.

Unit Mix & Floor PlansThe building's recurring floor plans, found by grouping units with identical beds, baths and square footage in county records. Larger groups are the building's standard layouts; leftover units have one-off sizes.

1 bed
4 units

Value DistributionHow the building's units spread across value ranges by our current estimates. A wide spread usually means big differences in size, floor or view.

$445K–$445K
1 unit
$651K–$651K
1 unit
$693K–$693K
1 unit
$737K–$737K
1 unit

Ownership & Financing

Owner-occupiedThe share of units where the owner lives in the unit, per county records. The rest are second homes or rentals.75%
Company-ownedUnits owned through an LLC, trust, or other company — a rough proxy for investor ownership.0%
Typical owner tenureThe middle number of years since each unit last changed hands — how long the current owners have been in place.1.3 yrs
Cash purchases (5 yrs)The share of purchases in the last 5 years with no mortgage recorded. High cash share is common in second-home and investor buildings.67%
Avg. loan-to-valueAverage current loan balance against unit value across the building. Low numbers mean owners hold lots of equity — a sign of financial stability.77%
Median owner equityThe middle dollar amount of equity (value minus loans) unit owners hold in this building.$691,651
Median tax billThe middle annual property tax bill among the building's units.$8,980
Pre-foreclosure noticesUnits with an active pre-foreclosure or foreclosure notice on file.0

Recent SalesThe latest recorded arms-length sales in the building, newest first.

Unit 1Jun 5, 2026$752,000Unit 3Mar 24, 2026$717,000Unit 2Dec 2, 2024$722,000Unit 5Mar 25, 2021$738,000BuildingNov 14, 2018$700,000Unit 2Jul 31, 2013$435,000Unit 1Aug 26, 2011$349,000BuildingJul 23, 2010$343,500Unit 2May 3, 2010$337,500Unit 5Feb 23, 2010$379,000

Values are TopHap estimates, not appraisals. Sales, ownership and tax figures come from recorded county documents via ATTOM and can lag by several weeks.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$11,792 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$789,466 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$238,940
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$557,526
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$773,850
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$694,080

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
CountyALAMEDA
Lot (acres)The size of the land the home sits on, from county records.0.21
GarageWhether the property has a garage, and details like whether it is attached to the home.Carport (Unspecified)
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(2)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

M
West Oakland Middle SchoolF
Middle · Grades 6–8 · 0.4 mi
H
McClymonds High SchoolD-
High · Grades 9–12 · 0.4 mi
E
Martin Luther King Jr. Elementary SchoolF
Elementary · Grades KG–5 · 0.5 mi

District: Oakland Unified School District

Neighborhood · ZIP 94607These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.169
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.91
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.422

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.31%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.21%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.5%
PopulationHow many people live in this area.31,205
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.4,357 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$87,935
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$121,763
Average tempThe average temperature here across a full year.58°F
Annual precipHow much rain and melted snow falls here in a typical year.21 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

All UnitsEvery property record the county has at this street address, such as the units in a condo building. Prices shown are our estimates, not asking prices.

829 21st St
1 bd · 2 ba · 1,397 ft²
829 21st St
1 bd · 2 ba · 1,546 ft²
$737K
829 21st St
1 bd · 2 ba · 1,399 ft²
$651K
829 21st St # 3
1 bd · 2 ba · 1,374 ft²
$693K
829 21st St # 5
1 bd · 2 ba · 1,308 ft²
$445K

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

About 829 21st St

How many units are in 829 21st St, Oakland, CA?

829 21st St, Oakland, CA has 4 residential units across built in 2009, according to county assessor records.

What is a unit at 829 21st St, Oakland, CA worth?

The median TopHap Estimate across the 4 units at 829 21st St, Oakland, CA is $671,926. That works out to $471 per square foot. Units run from 1,308 to 1,546 square feet. Estimates are modelled from recorded sales and assessments, not appraisals.

Is 829 21st St, Oakland, CA expensive for Oakland?

Units at 829 21st St, Oakland, CA carry a median of $471 per square foot, 21% above the Oakland median of $390 per square foot.

How often do units sell at 829 21st St, Oakland, CA?

2 units at 829 21st St, Oakland, CA sold in the last 12 months, out of 12 recorded arms-length sales all time. That is a turnover rate of 50.0% of the building per year. The median sale over that period was $735K.

Have units at 829 21st St, Oakland, CA appreciated?

Across 7 repeat sales of the same unit, 829 21st St, Oakland, CA returned a median 5.3% per year. Because each pair is the same unit bought and sold, the figure is not distorted by which units traded. The median owner held for 11.1 years.

More homes on 21st St

Closest homes

More homes in Oakland 94607

Assigned schools

Explore the area

See this home in context

Open 829 21st St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map