Home › Castro/Upper Market › Castro St
666 Castro St
Condo, 3 bd, 2 ba, 1,500 sqft, built 1886
Today’s estimate uses 1,500 sqft and the home’s latest facts. It does not estimate the home’s value at a past sale date.
41 sales inside 0.35 mi since Apr 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
$2,003,000
$1,622,000estimated range$2,423,000
From 40 comps at a weighted median of $1,335 per sqft.
- Block
- 2696
- Lot
- 071
- Sales
- Nov 2025 to Oct 2026
- Prices adjusted to
- 2026-10-30
- Within
- 0.35 mi
- Sold since
- Apr 2025
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I'm interestedSale prices versus asking
Similarity-weighted median: 17.3% above final asking.
Middle half: 7.5% above asking to 22.6% above asking.
31 of 40 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 (41)
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 | 0.06 mi | nearby on same street, similar size, 3 bd, recent | ||
| 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 | 0.21 mi | recent | ||
| 4054 18th St | 2026-03-20 | $350K | No asking price | — | $362K | $229 | 3bd 1ba 1,582sf | 0.21 mi | similar size, 3 bd | ||
| 27 Ford St | 2026-09-18 | $2.2M | $1,795,000 | $405,000 above asking (22.6%) | $2.2M | $1,546 | 2bd 2ba 1,423sf | 0.32 mi | similar size, recent | ||
| 4052 18th St | 2026-06-24 | $1.43M | No asking price | — | $1.48M | $1,088 | 2bd 3ba 1,364sf | 0.21 mi | similar size | ||
| 150 Eureka St #101 | 2026-04-14 | $720K | No asking price | — | $728K | — | 2bd 2ba | 0.22 mi | no size on record | ||
| 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 | 0.20 mi | similar size | ||
| 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 | 0.15 mi | 3 bd | ||
| 189 Collingwood St | 2026-07-22 | $1.67M | No asking price | — | $1.76M | $1,335 | 2bd 2ba 1,321sf | 0.09 mi | |||
| 317 Douglass St | 2026-02-03 | $1.17M | No asking price | — | $1.25M | $954 | 3bd 1ba 1,309sf | 0.22 mi | 3 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 | 0.09 mi | same street | ||
| 39 Hartford St | 2025-12-04 | $1.71M | $1,399,000 | $306,000 above asking (21.9%) | $1.97M | $1,190 | 3bd 2ba 1,652sf | 0.27 mi | similar size, 3 bd | ||
| 143 Ord St | 2026-05-05 | $1.33M | $1,295,000 | $35,000 above asking (2.7%) | $1.36M | $825 | 2bd 1ba 1,653sf | 0.34 mi | similar size | ||
| 48 Caselli Ave | 2026-10-16 | $1.5M | $1,395,000 | $105,000 above asking (7.5%) | $1.46M | $1,280 | 2bd 1ba 1,140sf | 0.32 mi | recent | ||
| 50 Collingwood St | 2026-10-16 | $2M | $1,599,000 | $401,000 above asking (25.1%) | $1.95M | $1,443 | 2bd 2ba 1,348sf | 0.24 mi | recent | ||
| 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 | 0.26 mi | |||
| 803 Castro St | 2026-08-28 | $2.6M | No asking price | — | $2.7M | $1,126 | 3bd 2ba 2,400sf | 0.16 mi | same street, 3 bd, recent | ||
| 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 | 0.13 mi | |||
| 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 | 0.22 mi | 3 bd | ||
| 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 | 0.13 mi | similar size, 3 bd | ||
| 49 Seward St #1 | 2025-11-04 | $1.73M | $1,495,000 | $230,000 above asking (15.4%) | $1.95M | $1,343 | 2bd 2ba 1,454sf | 0.29 mi | similar size | ||
| 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 | 0.25 mi | |||
| 615 Noe St #2 | 2026-06-23 | $1.4M | $1,400,000 | At asking | $1.46M | $1,301 | 2bd 1ba 1,121sf | 0.16 mi | |||
| 4150 17th St APT 2 | 2026-06-16 | $1.93M | No asking price | — | $2.01M | $1,279 | 2bd 2ba 1,575sf | 0.35 mi | similar size | ||
| 4316 18th St | 2026-05-21 | $1.2M | $1,188,000 cut from $1.2M | $12,000 above asking (1.0%) | $1.23M | $1,197 | 2bd 1ba 1,028sf | 0.23 mi | |||
| 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 | 0.31 mi | recent | ||
| 620 Sanchez St | 2026-03-12 | $4.09M | No asking price | — | $4.22M | $2,346 | 3bd 2.5ba 1,800sf | 0.25 mi | 3 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 | 0.29 mi | recent | ||
| 487 Sanchez St | 2026-04-14 | $1.05M | $929,000 | $121,000 above asking (13.0%) | $1.06M | $1,087 | 2bd 1ba 977sf | 0.34 mi | |||
| 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 | 0.33 mi | |||
| 4527 18th St | 2026-05-11 | $1.3M | $995,000 | $305,000 above asking (30.7%) | $1.33M | $1,207 | 1bd 1ba 1,105sf | 0.30 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 | 0.34 mi | recent | ||
| 126 Romain St | 2026-06-30 | $1.35M | $1,095,000 | $255,000 above asking (23.3%) | $1.41M | $1,392 | 2bd 1ba 1,010sf | 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 | 0.30 mi | |||
| 170 Corwin St | 2026-06-08 | $2.39M | Unclear | — | $2.49M | $1,127 | 4bd 2ba 2,210sf | 0.30 mi | |||
| 214 Eureka St | 2026-02-25 | $1.25M | $1,088,000 | $162,000 above asking (14.9%) | $1.34M | $1,610 | 2bd 1ba 832sf | 0.18 mi | |||
| 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 | 0.24 mi | |||
| 65 Collingwood St APT 1 | 2025-11-14 | $1.17M | $1,059,000 | $111,000 above asking (10.5%) | $1.32M | $1,379 | 2bd 1ba 960sf | 0.23 mi | |||
| 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 | 0.34 mi | |||
| 3941 19th St | 2026-02-13 | $3.13M | No asking price | — | $3.35M | $1,557 | 3bd 2.5ba 2,154sf | 0.22 mi | 3 bd | ||
| 2425 Market St APT 6 | 2026-04-17 | $1.2M | $995,000 | $205,000 above asking (20.6%) | $1.21M | $1,416 | 2bd 1ba 857sf | 0.26 mi |
This home's sale history
- 2018-12-11: $1,850,000 (price inferred from public records, high confidence)