Home › Castro/Upper Market › 21st St
3660 21st St
Single-family home, 3 bd, 5 ba, 4,731 sqft, built 1923
Today’s estimate uses 4,731 sqft and the home’s latest facts. It does not estimate the home’s value at a past sale date.
35 sales inside 0.75 mi since May 2024. 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
Medium confidence
$8,719,000
From 35 comps at a weighted median of $1,843 per sqft.
- Block
- 3605
- Lot
- 019
- Sales
- May 2024 to Oct 2026
- Prices adjusted to
- 2026-10-31
- Within
- 0.75 mi
- Sold since
- May 2024
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I'm interestedSale prices versus asking
Similarity-weighted median: 21.2% above final asking.
Middle half: 8.4% above asking to 46.0% above asking.
19 of 35 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 (35)
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3627 21st St | 2026-04-20 | $5.4M | $4,700,000 | $700,000 above asking (14.9%) | $5.53M | $1,843 | 3bd 3ba 3,003sf | <0.05 mi | nearby on same street, 3 bd | ||
| 476 Liberty St | 2026-09-28 | $5.6M | $3,795,000 | $1,805,000 above asking (47.6%) | $5.6M | $1,747 | 4bd 4ba 3,205sf | 0.15 mi | recent | ||
| 381 Liberty St | 2026-06-04 | $8.75M | $5,995,000 | $2,755,000 above asking (46.0%) | $9.07M | $2,184 | 5bd 4ba 4,152sf | <0.05 mi | |||
| 938 Sanchez St | 2025-11-05 | $6.5M | $5,995,000 | $505,000 above asking (8.4%) | $7.57M | $1,949 | 4bd 4ba 3,885sf | 0.18 mi | |||
| 4075 20th St | 2026-06-26 | $5.58M | $4,295,000 | $1,285,000 above asking (29.9%) | $5.78M | $1,775 | 4bd 3ba 3,258sf | 0.16 mi | |||
| 168 Jersey St | 2025-11-10 | $7.2M | No asking price | — | $8.39M | $2,254 | 4bd 5ba 3,720sf | 0.39 mi | |||
| 4558 19th St | 2026-06-12 | $5.4M | $5,495,000 | $95,000 below asking (1.7%) | $5.6M | $1,490 | 5bd 6ba 3,757sf | 0.63 mi | |||
| 335 Diamond St | 2026-04-08 | $6.42M | $6,800,000 | $375,000 below asking (5.5%) | $6.58M | $2,072 | 3bd 3ba 3,178sf | 0.40 mi | 3 bd | ||
| 919 Church St Price inferred from public records | 2024-10-28 | $6.3M | — | — | $6.75M | $1,660 | 4bd 4ba 4,070sf | 0.10 mi | |||
| 481 Jersey St | 2026-04-20 | $7.6M | No asking price | — | $7.79M | $2,164 | 4bd 3.5ba 3,600sf | 0.57 mi | |||
| 941 Diamond St | 2026-10-01 | $5.66M | $4,850,000 | $807,750 above asking (16.7%) | $5.42M | $1,720 | 4bd 4ba 3,153sf | 0.60 mi | recent | ||
| 4001 21st St | 2026-01-06 | $8.16M | No asking price | — | $9.51M | $2,502 | 0bd 0ba 3,800sf | 0.37 mi | same street | ||
| 143 Collingwood St | 2026-06-08 | $4.85M | $3,695,000 | $1,155,000 above asking (31.3%) | $5.03M | $1,736 | 4bd 4ba 2,895sf | 0.43 mi | |||
| 346 Duncan St | 2026-10-15 | $6.35M | $4,895,000 | $1,456,000 above asking (29.7%) | $6.09M | $1,889 | 4bd 3ba 3,223sf | 0.73 mi | recent | ||
| 267 Clipper St | 2026-08-31 | $6.4M | No asking price | — | $6.76M | $2,236 | 4bd 3ba 3,023sf | 0.55 mi | recent | ||
| 889 Elizabeth St | 2026-03-20 | $6.9M | $5,695,000 | $1,205,000 above asking (21.2%) | $7.17M | $2,104 | 4bd 4ba 3,405sf | 0.70 mi | |||
| 4258 26th St | 2026-04-23 | $5M | No asking price | — | $5.12M | $1,330 | 5bd 5ba 3,854sf | 0.67 mi | |||
| 818 Douglass St | 2026-02-18 | $7.25M | $5,898,000 | $1,352,000 above asking (22.9%) | $7.75M | $2,257 | 4bd 4ba 3,434sf | 0.68 mi | |||
| 553 Douglass St | 2026-08-27 | $5M | $3,785,000 | $1,214,999 above asking (32.1%) | $5.28M | $1,707 | 5bd 4ba 3,095sf | 0.53 mi | recent | ||
| 279 Diamond St | 2026-01-28 | $4.58M | $3,495,000 | $1,085,000 above asking (31.0%) | $5.34M | $1,773 | 4bd 3ba 3,010sf | 0.42 mi | |||
| 3961 25th St | 2026-05-26 | $5.8M | $5,495,000 | $305,000 above asking (5.6%) | $6M | $2,114 | 4bd 4ba 2,838sf | 0.47 mi | |||
| 441 Douglass St | 2026-05-18 | $4.5M | No asking price | — | $4.66M | $1,701 | 3bd 4ba 2,737sf | 0.52 mi | 3 bd | ||
| 354 Fair Oaks St Price inferred from public records | 2024-12-30 | $7.13M | — | — | $8.1M | $1,963 | 5bd 4ba 4,126sf | 0.48 mi | |||
| 653 Noe St Price inferred from public records | 2024-09-30 | $5.25M | — | — | $5.77M | $1,444 | 4bd 3ba 4,000sf | 0.20 mi | |||
| 3835 Cesar Chavez St | 2026-09-15 | $1M | No asking price | — | $1M | $332 | 5bd 6ba 3,015sf | 0.66 mi | recent | ||
| 439 Clipper St | 2025-12-05 | $4.85M | $4,850,000 | At asking | $5.74M | $1,818 | 4bd 6ba 3,157sf | 0.63 mi | |||
| 405 Hill St Price inferred from public records | 2024-12-20 | $4M | — | — | $4.55M | $1,604 | 3bd 3ba 2,835sf | 0.11 mi | 3 bd | ||
| 893 Elizabeth St | 2026-06-15 | $3.21M | $3,295,000 | $82,500 below asking (2.5%) | $3.33M | $1,249 | 4bd 3ba 2,665sf | 0.71 mi | |||
| 3846 Cesar Chavez St | 2026-05-04 | $3.5M | $1,995,000 | $1,505,000 above asking (75.4%) | $3.62M | $1,305 | 4bd 5ba 2,775sf | 0.62 mi | |||
| 4267 24th St Price inferred from public records | 2024-09-17 | $6.8M | — | — | $7.48M | $2,062 | 3bd 4ba 3,628sf | 0.62 mi | 3 bd | ||
| 268 Grand View Ave | 2026-04-07 | $4.2M | Unclear | — | $4.3M | $1,263 | 4bd 4ba 3,407sf | 0.70 mi | |||
| 1177 Guerrero St | 2025-10-30 | $4.35M | $3,895,000 | $455,000 above asking (11.7%) | $4.97M | $1,736 | 4bd 4ba 2,865sf | 0.46 mi | |||
| 253 Chattanooga St Price inferred from public records | 2024-10-18 | $5.47M | — | — | $5.87M | $1,966 | 4bd 4ba 2,986sf | 0.33 mi | |||
| 573 Diamond St Price inferred from public records | 2024-05-20 | $3.8M | — | — | $4.06M | $1,507 | 3bd 4ba 2,692sf | 0.45 mi | 3 bd | ||
| 1825 Castro St Price inferred from public records | 2024-07-15 | $4.43M | — | — | $4.94M | $1,623 | 5bd 3ba 3,044sf | 0.71 mi |