Home › Castro/Upper Market › 21st St
3872 21st St
Condo, 2 bd, 2 ba, 1,588 sqft, built 1928
Today’s estimate uses 1,588 sqft and the home’s latest facts. It does not estimate the home’s value at a past sale date.
31 sales inside 0.35 mi since May 2025. Click a sale on the map, or untick it below, to leave it out.
Drag the circle or this strip to change the searchEstimated sale price today
High confidence
$2,120,000
From 30 comps at a weighted median of $1,335 per sqft.
- Block
- 3603
- Lot
- 113
- Sales
- Nov 2025 to Oct 2026
- Prices adjusted to
- 2026-10-31
- Within
- 0.35 mi
- Sold since
- May 2025
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I'm interestedSale prices versus asking
Similarity-weighted median: 17.3% above final asking.
Middle half: 8.8% above asking to 20.8% above asking.
20 of 30 selected comps have a verified final asking price.
Comparisons use the final advertised asking price from the same sale, before pending or closing.
Comparable sales (31)
Every sale inside the circle starts ticked. Untick one here, or click it on the map, to leave it out. Closer, more similar sales weigh more.
| Address | Sold | Price | Final asking | Sale vs. asking | Adj. today | $/sqft | Size | Dist. | Why | Match | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 627 Castro St | 2026-10-14 | $2.34M | $1,995,000 | $345,000 above asking (17.3%) | $2.28M | $1,380 | 3bd 2ba 1,650sf | 0.18 mi | similar size, recent | ||
| 150 Eureka St #101 | 2026-04-14 | $720K | No asking price | — | $728K | — | 2bd 2ba | 0.35 mi | 2 bd, no size on record | ||
| 189 Collingwood St | 2026-07-22 | $1.67M | No asking price | — | $1.76M | $1,335 | 2bd 2ba 1,321sf | 0.23 mi | 2 bd | ||
| 3868 21st St | 2026-03-11 | $1.67M | $1,395,000 | $270,000 above asking (19.4%) | $1.72M | $1,322 | 3bd 2ba 1,301sf | <0.05 mi | nearby on same street | ||
| 125 Eureka St | 2026-10-19 | $2.12M | $1,695,000 | $420,000 above asking (24.8%) | $2.06M | $1,524 | 2bd 2ba 1,350sf | 0.34 mi | 2 bd, recent | ||
| 4416 19th St | 2026-03-13 | $1.9M | $1,795,000 | $105,000 above asking (5.8%) | $1.96M | $1,328 | 2bd 2ba 1,478sf | 0.32 mi | similar size, 2 bd | ||
| 4054 18th St | 2026-03-20 | $350K | No asking price | — | $362K | $229 | 3bd 1ba 1,582sf | 0.33 mi | similar size | ||
| 4052 18th St | 2026-06-24 | $1.43M | No asking price | — | $1.48M | $1,088 | 2bd 3ba 1,364sf | 0.33 mi | 2 bd | ||
| 3822 22nd St | 2026-06-09 | $2.5M | $1,795,000 | $705,000 above asking (39.3%) | $2.6M | $2,192 | 2bd 2ba 1,188sf | 0.12 mi | 2 bd | ||
| 728 Castro St | 2026-04-22 | $1.6M | $1,325,000 | $275,500 above asking (20.8%) | $1.62M | $1,375 | 2bd 2ba 1,177sf | 0.06 mi | 2 bd | ||
| 432 Elizabeth St | 2026-10-19 | $1.65M | $1,095,000 | $555,000 above asking (50.7%) | $1.61M | $1,371 | 2bd 1ba 1,171sf | 0.33 mi | 2 bd, recent | ||
| 618 Sanchez St | 2026-07-17 | $2.3M | $2,399,000 | $99,000 below asking (4.1%) | $2.43M | $1,838 | 2bd 3ba 1,320sf | 0.26 mi | 2 bd | ||
| 803 Castro St | 2026-08-28 | $2.6M | No asking price | — | $2.7M | $1,126 | 3bd 2ba 2,400sf | <0.05 mi | recent | ||
| 161 Collingwood St | 2026-03-17 | $2.05M | $1,795,000 | $255,000 above asking (14.2%) | $2.12M | $1,317 | 3bd 3ba 1,608sf | 0.27 mi | similar size | ||
| 615 Noe St #2 | 2026-06-23 | $1.4M | $1,400,000 | At asking | $1.46M | $1,301 | 2bd 1ba 1,121sf | 0.21 mi | 2 bd | ||
| 671 Alvarado St | 2026-03-27 | $1.68M | $1,395,000 | $280,000 above asking (20.1%) | $1.73M | $1,343 | 2bd 2ba 1,288sf | 0.22 mi | 2 bd | ||
| 574 Diamond St | 2026-04-17 | $2.8M | No asking price | — | $2.83M | $1,360 | 3bd 3ba 2,083sf | 0.27 mi | |||
| 317 Douglass St | 2026-02-03 | $1.17M | No asking price | — | $1.25M | $954 | 3bd 1ba 1,309sf | 0.32 mi | |||
| 582 Douglass St | 2026-09-17 | $1.3M | $995,000 | $305,000 above asking (30.7%) | $1.3M | $1,258 | 1bd 1ba 1,033sf | 0.30 mi | recent | ||
| 620 Sanchez St | 2026-03-12 | $4.09M | No asking price | — | $4.22M | $2,346 | 3bd 2.5ba 1,800sf | 0.26 mi | |||
| 4021 19th St | 2026-05-15 | $1.3M | $1,279,500 cut from $1.35M | $20,500 above asking (1.6%) | $1.33M | $1,246 | 2bd 2ba 1,070sf | 0.20 mi | 2 bd | ||
| 523 Elizabeth St | 2026-03-25 | $25K | No asking price | — | $26K | $22 | 2bd 1ba 1,180sf | 0.32 mi | 2 bd | ||
| 3892 19th St | 2026-10-08 | $1.75M | $1,498,000 | $252,000 above asking (16.8%) | $1.7M | $1,838 | 2bd 2ba 926sf | 0.31 mi | 2 bd, recent | ||
| 4038 18th St | 2025-12-03 | $1.75M | $1,799,000 cut from $1.95M | $49,000 below asking (2.7%) | $2.02M | $1,017 | 3bd 3ba 1,985sf | 0.33 mi | |||
| 77 Grand View Ave APT 301 | 2026-07-22 | $980K | $1,000,000 cut from $1.2M | $20,000 below asking (2.0%) | $1.03M | $940 | 2bd 2ba 1,100sf | 0.34 mi | 2 bd | ||
| 160 Hancock St APT 1 | 2026-03-16 | $2.5M | $2,150,000 | $350,000 above asking (16.3%) | $2.58M | $1,307 | 2bd 3ba 1,976sf | 0.31 mi | 2 bd | ||
| 1218 Castro St | 2026-02-06 | $1.68M | No asking price | — | $1.8M | $1,702 | 2bd 2ba 1,055sf | 0.32 mi | 2 bd | ||
| 266 Cumberland St | 2026-10-26 | $3.1M | $2,200,000 | $900,000 above asking (40.9%) | $3.02M | $1,291 | 5bd 3ba 2,336sf | 0.30 mi | recent | ||
| 584 Douglass Street | 2025-11-20 | $1.24M | $1,200,000 | $40,000 above asking (3.3%) | $1.4M | $1,318 | 1bd 1ba 1,065sf | 0.30 mi | |||
| 3941 19th St | 2026-02-13 | $3.13M | No asking price | — | $3.35M | $1,557 | 3bd 2.5ba 2,154sf | 0.25 mi | |||
| 3882 23rd St | 2026-05-04 | $1.74M | $1,595,000 | $140,000 above asking (8.8%) | $1.78M | $1,867 | 2bd 2ba 953sf | 0.32 mi | 2 bd |