Williamson County · Round Rock

ZIP 78681 property tax overassessment report

14.6% of homes in Round Rock ZIP 78681 (2,549 of 17,495 parcels) are assessed more than 10% above what comparable-size homes in the same ZIP typically pay per square foot. Combined annual overpayment: $3,548,973.

17,495
Homes in ZIP
2,549
Flagged as overassessed
14.6%
$64,758
Avg overage / home
$528,037
Typical value
~$216/sqft

Williamson County · over-assessed homes overpay year-round

Next: WCAD 2027 values mail late March-April. Protest deadline: May 15, 2027.

Williamson County guide →

Top 25 most overassessed homes in 78681

Addresses anonymized. Pulled directly from HCAD public records. Each home pays significantly more than what a comparable-size home in this ZIP typically pays.

AddressSq ftYearMarket valExpectedOverage% over$/yr
4XXX SPANISH OAK DR6,9952022$3,023,320$1,510,920$1,512,400100.1%$30,097
4XXX OAK RIDGE DR4,2912020$2,280,617$926,856$1,353,761146.1%$26,940
2XXX CAMINO DEL VERDES PL6,7982006$2,714,071$1,468,368$1,245,70384.8%$24,789
5XXX OAK RIDGE DR4,2132019$2,148,420$910,008$1,238,412136.1%$24,644
4XXX OAK RIDGE DR4,3802019$2,152,879$946,080$1,206,799127.6%$24,015
4XXX OAK RIDGE DR4,2522019$2,082,221$918,432$1,163,789126.7%$23,159
2XXX CASA LINDA CV5,7042006$2,364,210$1,232,064$1,132,14691.9%$22,530
2XXX MAYFIELD DR7,0442015$2,648,026$1,521,504$1,126,52274%$22,418
2XXX SAM BASS RD5,4782015$2,267,884$1,183,248$1,084,63691.7%$21,584
2XXX CASA LINDA CV5,2452005$2,193,945$1,132,920$1,061,02593.7%$21,114
2XXX CAMINO DEL VERDES PL8,0372002$2,786,995$1,735,992$1,051,00360.5%$20,915
2XXX CASA LINDA CV6,5192012$2,456,933$1,408,104$1,048,82974.5%$20,872
4XXX OAK RIDGE DR4,0622020$1,910,353$877,392$1,032,961117.7%$20,556
2XXX WALSH DR5,5572016$2,203,940$1,200,312$1,003,62883.6%$19,972
4XXX SAM BASS RD4,2692006$1,921,369$922,104$999,265108.4%$19,885
1XXX GREAT OAKS DR3,6561976$1,768,792$789,696$979,096124%$19,484
3XXX OAK MEADOW DR5,8421979$2,210,004$1,261,872$948,13275.1%$18,868
3XXX OAK RIDGE DR1,8131999$1,329,608$391,608$938,000239.5%$18,666
1XXX HIDDEN RIDGE CT5,0672014$2,018,879$1,094,472$924,40784.5%$18,396
1XXX OAK FOREST DR4,1922012$1,828,003$905,472$922,531101.9%$18,358
2XXX COURT DEL REY4,9982001$1,970,716$1,079,568$891,14882.5%$17,734
1XXX HIDDEN RIDGE CT4,3252015$1,818,075$934,200$883,87594.6%$17,589
4XXX KNOLLWOOD CIR2,9291984$1,502,998$632,664$870,334137.6%$17,320
3XXX SAM BASS RD4,7251984$1,872,653$1,020,600$852,05383.5%$16,956
2XXX SAM BASS RD2,1721992$1,320,756$469,152$851,604181.5%$16,947
Data: HCAD public records, Williamson County, ZIP 78681. Addresses anonymized to protect privacy; full data is public record under Texas Public Information Act. Showing top 25; there are likely more overassessed homes in this ZIP. See the full statewide over-assessment study for the methodology behind these numbers.

Is yours one of them?

Past the regular May 15 date, late protests may still be accepted for good cause until the ARB approves the records (typically mid-July), and Williamson County publishes fresh 2027 values next April. Check your address free now, see if you can still file this year, and when new values drop your $49 iFile-ready protest kit is 30 seconds away.

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