Home › Castro/Upper Market › 21st St
3640 21st St
Single-family home, 2 bd, 1 ba, 1,456 sqft, built 1900
Today’s estimate uses 1,456 sqft and the home’s latest facts. It does not estimate the home’s value at a past sale date.
88 sales inside 0.75 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
Low confidence
$2,759,000
$1,793,000estimated range$3,725,000
From 88 comps at a weighted median of $1,895 per sqft.
- Block
- 3605
- Lot
- 017
- Sales
- Oct 2025 to Oct 2026
- Prices adjusted to
- 2026-10-31
- Within
- 0.75 mi
- Sold since
- May 2025
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I'm interestedSale prices versus asking
Similarity-weighted median: 31.7% above final asking.
Middle half: 22.0% above asking to 65.3% above asking.
64 of 88 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 (88)
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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 701 Castro St | 2026-04-21 | $4.29M | No asking price | — | $4.4M | $3,026 | 2ba 1,453sf | 0.30 mi | similar size | ||
| 343 Cumberland St | 2026-09-03 | $3.17M | $1,995,000 | $1,180,000 above asking (59.1%) | $3.17M | $2,573 | 3bd 2ba 1,234sf | 0.18 mi | recent | ||
| 264 Liberty St | 2026-05-11 | $3.75M | $1,995,000 | $1,755,000 above asking (88.0%) | $3.88M | $2,174 | 2bd 2ba 1,785sf | 0.11 mi | 2 bd | ||
| 3622 21st St | 2026-02-17 | $3.3M | $1,988,000 | $1,312,000 above asking (66.0%) | $3.53M | $1,895 | 2bd 2ba 1,862sf | <0.05 mi | nearby on same street, 2 bd | ||
| 311 Cumberland St | 2026-07-15 | $1.92M | No asking price | — | $2.04M | $1,743 | 2bd 2ba 1,172sf | 0.17 mi | 2 bd | ||
| 731 Noe St | 2026-06-24 | $3.55M | $2,695,000 | $855,000 above asking (31.7%) | $3.68M | $2,080 | 3bd 2ba 1,769sf | 0.18 mi | |||
| 331 Bartlett St | 2026-09-15 | $1.32M | No asking price | — | $1.32M | $1,019 | 2bd 1ba 1,300sf | 0.63 mi | 2 bd, recent | ||
| 522 Liberty St | 2025-11-26 | $2.1M | $2,195,000 | $95,000 below asking (4.3%) | $2.45M | $1,519 | 3bd 2ba 1,610sf | 0.23 mi | |||
| 3906 23rd St | 2026-05-11 | $2.5M | $1,295,000 | $1,205,000 above asking (93.1%) | $2.59M | $2,273 | 2bd 1ba 1,138sf | 0.24 mi | 2 bd | ||
| 449 Alvarado St | 2026-06-04 | $4.95M | $3,750,000 | $1,200,000 above asking (32.0%) | $5.13M | $3,023 | 4bd 3ba 1,697sf | 0.24 mi | |||
| 442 Vicksburg St | 2026-05-18 | $2.25M | No asking price | — | $2.33M | $1,431 | 3bd 2ba 1,627sf | 0.45 mi | |||
| 761 Noe St | 2026-03-27 | $1.52M | $1,595,000 cut from $1.65M | $70,000 below asking (4.4%) | $1.58M | $1,263 | 2bd 1ba 1,254sf | 0.18 mi | 2 bd | ||
| 278 Eureka St | 2026-01-02 | $2.52M | No asking price | — | $2.94M | $2,029 | 3bd 1ba 1,450sf | 0.52 mi | similar size | ||
| 4245 25th St | 2026-05-01 | $2.35M | $1,895,000 | $455,000 above asking (24.0%) | $2.43M | $1,707 | 3bd 2ba 1,424sf | 0.61 mi | similar size | ||
| 465 Liberty St | 2025-12-22 | $1.81M | $1,388,000 | $419,000 above asking (30.2%) | $2.14M | $1,665 | 2bd 2ba 1,284sf | 0.15 mi | 2 bd | ||
| 359 Diamond St | 2026-02-04 | $2.23M | No asking price | — | $2.39M | $1,542 | 3bd 2ba 1,550sf | 0.42 mi | similar size | ||
| 480 Bartlett St | 2026-10-19 | $2.13M | $1,995,000 | $130,000 above asking (6.5%) | $2.04M | $1,331 | 4bd 3ba 1,530sf | 0.72 mi | similar size, recent | ||
| 114 Fair Oaks St | 2026-06-05 | $290K | No asking price | — | $301K | $285 | 2bd 1ba 1,054sf | 0.28 mi | 2 bd | ||
| 4031 22nd St | 2025-10-31 | $2.53M | $1,495,000 | $1,038,000 above asking (69.4%) | $2.9M | $1,893 | 2bd 2ba 1,530sf | 0.48 mi | similar size, 2 bd | ||
| 4149 26th St | 2026-03-27 | $2.15M | $1,895,000 | $255,000 above asking (13.5%) | $2.23M | $1,588 | 3bd 3ba 1,406sf | 0.64 mi | similar size | ||
| 1116 Diamond St | 2026-04-20 | $2.35M | $1,895,000 | $455,000 above asking (24.0%) | $2.41M | $1,619 | 3bd 2ba 1,488sf | 0.70 mi | similar size | ||
| 3666 22nd St | 2026-07-06 | $3.8M | $3,100,000 | $700,000 above asking (22.6%) | $4.04M | $1,939 | 3bd 3ba 2,085sf | 0.12 mi | |||
| 1604 Castro St | 2026-08-13 | $2.86M | $1,995,000 | $865,008 above asking (43.4%) | $3.02M | $2,576 | 2bd 1ba 1,173sf | 0.62 mi | 2 bd, recent | ||
| 315 Capp St | 2026-03-30 | $1.25M | No asking price | — | $1.29M | $808 | 2bd 1ba 1,600sf | 0.69 mi | similar size, 2 bd | ||
| 1040 Sanchez St | 2026-06-08 | $2.48M | No asking price | — | $2.58M | $2,385 | 3bd 2ba 1,080sf | 0.29 mi | |||
| 359 Douglass St | 2026-03-11 | $2.06M | $1,195,000 | $860,000 above asking (72.0%) | $2.13M | $1,280 | 2bd 1ba 1,667sf | 0.55 mi | 2 bd | ||
| 4268 26th St | 2026-03-30 | $8.6M | No asking price | — | $8.93M | $6,444 | 3bd 2ba 1,385sf | 0.68 mi | similar size | ||
| 1462 Guerrero St | 2026-09-15 | $1.93M | $1,495,000 | $435,000 above asking (29.1%) | $1.93M | $1,209 | 4bd 4ba 1,597sf | 0.71 mi | similar size, recent | ||
| 4023 25th St | 2026-06-04 | $4.3M | No asking price | — | $4.46M | $2,426 | 3bd 2ba 1,837sf | 0.49 mi | |||
| 438 Elizabeth St | 2026-08-28 | $4.93M | $3,295,000 | $1,635,000 above asking (49.6%) | $5.21M | $2,489 | 3bd 3ba 2,092sf | 0.30 mi | recent | ||
| 4047 Cesar Chavez St | 2025-11-04 | $2.05M | $1,899,000 | $151,000 above asking (8.0%) | $2.39M | $1,705 | 2bd 1ba 1,400sf | 0.65 mi | similar size, 2 bd | ||
| 541 Diamond St | 2026-05-22 | $3.05M | $2,495,000 | $555,000 above asking (22.2%) | $3.16M | $2,869 | 2bd 2ba 1,100sf | 0.45 mi | 2 bd | ||
| 3616 21st St | 2026-01-30 | $4.23M | $2,188,000 | $2,037,888 above asking (93.1%) | $4.92M | $2,589 | 2bd 2ba 1,902sf | <0.05 mi | nearby on same street, 2 bd | ||
| 32 Carson St | 2026-04-17 | $3.4M | $2,585,000 | $815,000 above asking (31.5%) | $3.48M | $2,087 | 3bd 3ba 1,670sf | 0.62 mi | |||
| 481 27th St | 2026-09-01 | $2.61M | $1,898,000 | $713,000 above asking (37.6%) | $2.61M | $1,460 | 3bd 3ba 1,788sf | 0.71 mi | recent | ||
| 1442 Sanchez St | 2026-04-10 | $4.6M | $3,495,000 | $1,105,000 above asking (31.6%) | $4.71M | $3,026 | 3bd 4ba 1,558sf | 0.73 mi | similar size | ||
| 133 Vicksburg St | 2026-02-13 | $3.75M | $2,695,000 | $1,055,000 above asking (39.1%) | $4.01M | $2,072 | 3bd 2ba 1,935sf | 0.27 mi | |||
| 730 Elizabeth St | 2026-05-13 | $2.85M | No asking price | — | $2.95M | $1,594 | 1ba 1,850sf | 0.55 mi | |||
| 734 Elizabeth St | 2025-11-07 | $1.57M | $1,450,000 | $120,000 above asking (8.3%) | $1.83M | $1,404 | 3bd 1ba 1,302sf | 0.55 mi | |||
| 28 Hartford St | 2026-04-24 | $3M | No asking price | — | $3.07M | $1,606 | 3bd 3ba 1,915sf | 0.47 mi | |||
| 3828 23rd Street | 2026-09-10 | $1.85M | $1,699,000 | $151,000 above asking (8.9%) | $1.85M | $851 | 4bd 3ba 2,173sf | 0.23 mi | recent | ||
| 3974 22nd St | 2026-02-23 | $3.08M | $2,795,000 | $280,000 above asking (10.0%) | $3.29M | $1,777 | 3bd 2ba 1,850sf | 0.41 mi | |||
| 1008 Castro St | 2026-04-01 | $2.2M | $1,795,000 | $405,000 above asking (22.6%) | $2.25M | $1,957 | 2bd 1ba 1,152sf | 0.38 mi | 2 bd | ||
| 1375 Sanchez St | 2026-04-03 | $4.03M | $2,695,000 | $1,330,000 above asking (49.4%) | $4.13M | $2,342 | 3bd 2ba 1,761sf | 0.66 mi | |||
| 145 Grand View Ave | 2026-07-17 | $3.1M | No asking price | — | $3.3M | $2,795 | 1ba 1,180sf | 0.59 mi | |||
| 4555 19th St | 2026-06-18 | $1.85M | No asking price | — | $1.92M | $1,679 | 2bd 1ba 1,142sf | 0.63 mi | 2 bd | ||
| 306 Diamond St | 2025-11-13 | $2.6M | $1,750,000 | $850,000 above asking (48.6%) | $3.03M | $1,685 | 3bd 2ba 1,797sf | 0.45 mi | |||
| 308 Diamond St | 2025-11-12 | $3M | $2,750,000 | $250,000 above asking (9.1%) | $3.49M | $1,911 | 3bd 2ba 1,828sf | 0.45 mi | |||
| 3853 22nd St | 2026-03-10 | $4.58M | $2,598,000 | $1,977,000 above asking (76.1%) | $4.75M | $2,259 | 3bd 3ba 2,103sf | 0.29 mi | |||
| 543 Jersey St | 2026-04-16 | $2.48M | $1,495,000 | $980,000 above asking (65.6%) | $2.54M | $2,161 | 3bd 1ba 1,174sf | 0.64 mi | |||
| 203 Hoffman Ave | 2026-06-23 | $2.61M | $1,499,000 | $1,111,000 above asking (74.1%) | $2.7M | $2,352 | 3bd 1ba 1,150sf | 0.70 mi | |||
| 537 Liberty St | 2026-08-20 | $3.58M | $3,699,000 | $119,000 below asking (3.2%) | $3.78M | $1,667 | 5bd 3ba 2,269sf | 0.24 mi | recent | ||
| 18 Ford St | 2026-09-28 | $4.34M | No asking price | — | $4.34M | $1,835 | 3bd 2ba 2,365sf | 0.41 mi | recent | ||
| 27 Homestead St | 2026-03-23 | $1.65M | No asking price | — | $1.71M | $1,452 | 3bd 1ba 1,180sf | 0.71 mi | |||
| 971 Sanchez St | 2026-10-16 | $4.95M | $2,995,000 | $1,956,522 above asking (65.3%) | $4.75M | $1,933 | 4bd 3ba 2,455sf | 0.21 mi | recent | ||
| 264 Duncan St | 2026-05-27 | $1.85M | $1,159,000 | $691,000 above asking (59.6%) | $1.91M | $1,813 | 2bd 1ba 1,056sf | 0.73 mi | 2 bd | ||
| 4080 26th St | 2026-05-08 | $4M | No asking price | — | $4.14M | $2,225 | 4bd 3ba 1,860sf | 0.58 mi | |||
| 663 Guerrero St | 2026-03-11 | $2.62M | No asking price | — | $2.72M | $1,451 | 3bd 2ba 1,875sf | 0.40 mi | |||
| 4431 19th St | 2026-04-24 | $2.6M | $2,500,000 | $100,000 above asking (4.0%) | $2.66M | $1,302 | 3bd 2ba 2,046sf | 0.56 mi | |||
| 4367 21st St | 2026-05-11 | $3.13M | $2,395,000 | $733,000 above asking (30.6%) | $3.24M | $1,717 | 4bd 3ba 1,885sf | 0.62 mi | same street | ||
| 80 Diamond St | 2026-04-22 | $3.83M | $2,995,000 | $833,000 above asking (27.8%) | $3.92M | $1,877 | 3bd 3ba 2,090sf | 0.56 mi | |||
| 4106 20th St | 2025-12-03 | $2.6M | $2,125,000 | $475,000 above asking (22.4%) | $3.08M | $2,930 | 4bd 3ba 1,050sf | 0.23 mi | |||
| 591 Diamond St | 2026-10-05 | $4.38M | $3,295,000 | $1,080,000 above asking (32.8%) | $4.19M | $1,769 | 3bd 4ba 2,370sf | 0.48 mi | recent | ||
| 4048 23rd St | 2026-05-15 | $4.79M | $3,195,000 | $1,594,423 above asking (49.9%) | $4.96M | $2,335 | 4bd 2ba 2,122sf | 0.34 mi | |||
| 276 Grand View Ave | 2026-05-22 | $2.8M | $2,800,000 | At asking | $2.9M | $2,414 | 4bd 4ba 1,200sf | 0.72 mi | |||
| 3761 21st St | 2026-02-03 | $4.63M | $4,295,000 | $340,000 above asking (7.9%) | $4.96M | $2,203 | 4bd 4ba 2,250sf | 0.15 mi | same street | ||
| 1621 Castro St | 2026-06-12 | $4.2M | $3,498,000 | $702,000 above asking (20.1%) | $4.35M | $2,275 | 4bd 4ba 1,913sf | 0.62 mi | |||
| 4118 20th St | 2026-04-29 | $4.4M | $2,995,000 | $1,405,000 above asking (46.9%) | $4.51M | $1,972 | 4bd 4ba 2,287sf | 0.24 mi | |||
| 1279 Church St | 2026-06-01 | $2.55M | $1,795,000 | $755,000 above asking (42.1%) | $2.64M | $2,930 | 3bd 2ba 902sf | 0.44 mi | |||
| 249 Fair Oaks St | 2026-04-28 | $4.7M | $4,000,000 | $700,000 above asking (17.5%) | $4.82M | $2,117 | 3bd 3ba 2,275sf | 0.39 mi | |||
| 4368 23rd St | 2026-02-06 | $1.72M | $1,550,000 | $170,000 above asking (11.0%) | $1.84M | $1,603 | 4bd 1ba 1,147sf | 0.67 mi | |||
| 3983 19th St | 2026-02-11 | $3.3M | $3,295,000 | $5,000 above asking (0.2%) | $3.53M | $1,598 | 4bd 3ba 2,208sf | 0.25 mi | |||
| 4048 22nd St | 2026-07-15 | $3.77M | No asking price | — | $4.02M | $1,606 | 3bd 2ba 2,500sf | 0.49 mi | |||
| 3326 23rd St | 2026-06-01 | $3.48M | No asking price | — | $3.6M | $1,630 | 4bd 5ba 2,210sf | 0.56 mi | |||
| 3960 20th St | 2025-11-10 | $4.7M | $4,395,000 | $305,000 above asking (6.9%) | $5.47M | $2,372 | 4bd 4ba 2,308sf | 0.11 mi | |||
| 3879 23rd St | 2025-10-27 | $3.2M | $2,295,000 | $905,000 above asking (39.4%) | $3.66M | $1,645 | 4bd 4ba 2,225sf | 0.25 mi | |||
| 4216 22nd St | 2026-05-06 | $2.8M | $1,995,000 | $805,000 above asking (40.4%) | $2.9M | $3,292 | 3bd 2ba 880sf | 0.59 mi | |||
| 316 Douglass St | 2026-04-09 | $4.2M | $3,695,000 | $505,000 above asking (13.7%) | $4.3M | $1,779 | 3bd 4ba 2,420sf | 0.59 mi | |||
| 3775 16th St | 2025-10-29 | $2.42M | $1,995,000 | $425,000 above asking (21.3%) | $2.77M | $2,137 | 4bd 2ba 1,295sf | 0.65 mi | |||
| 121 Clipper St | 2026-04-08 | $4.6M | No asking price | — | $4.71M | $2,050 | 4bd 3ba 2,300sf | 0.53 mi | |||
| 282 Eureka St | 2026-03-30 | $3.9M | No asking price | — | $4.05M | $1,726 | 4bd 3ba 2,346sf | 0.51 mi | |||
| 4333 23rd St | 2026-04-08 | $3.2M | $2,495,000 | $705,000 above asking (28.3%) | $3.28M | $1,329 | 3bd 3ba 2,467sf | 0.67 mi | |||
| 771 Elizabeth St | 2026-07-24 | $5.85M | $4,795,000 | $1,055,000 above asking (22.0%) | $6.22M | $2,432 | 4bd 4ba 2,559sf | 0.60 mi | |||
| 323 Eureka St | 2026-03-12 | $5M | $3,495,000 | $1,504,999 above asking (43.1%) | $5.19M | $2,016 | 4bd 4ba 2,576sf | 0.48 mi | |||
| 1840 Castro St | 2026-06-18 | $3.85M | $2,495,000 | $1,355,000 above asking (54.3%) | $3.99M | $1,928 | 4bd 3ba 2,070sf | 0.74 mi | |||
| 621 Sanchez St | 2025-11-05 | $2.9M | No asking price | — | $3.38M | $1,409 | 4bd 3ba 2,400sf | 0.17 mi | |||
| 4356 25th St | 2026-06-03 | $4.8M | $3,500,000 | $1,300,000 above asking (37.1%) | $4.97M | $1,959 | 3bd 3ba 2,540sf | 0.67 mi | |||
| 35 Hattie Street | 2025-11-25 | $2.13M | $2,190,000 cut from $2.9M | $63,400 below asking (2.9%) | $2.48M | $984 | 5bd 5ba 2,518sf | 0.72 mi |
This home's sale history
- 2020-10-20: $4,800,000 (price inferred from public records, high confidence)
- 2019-01-17: $2,550,000 (price inferred from public records, high confidence)