Williamson County

What Buyers Should Know

Williamson County’s 2026 HUD area median income (AMI) for a 4-person household is approximately $137,000, with the TSAHC Heroes 115% AMI ceiling reaching ~$157,550. Most Williamson County buyers qualify for at least one TSAHC or TDHCA program; the county is not designated a HUD targeted area, so the standard income limits and first-time-buyer rules apply.

FHA loan limits in Williamson mirror the Austin-Round Rock baseline. Conforming limits run $806,500 for 1-unit. VA loans are uncapped above conforming limits for full-entitlement veterans.

Property tax in Williamson County averages around 2.04% effective (verify current year at the county appraisal district). The Texas residence homestead exemption shaves $100,000 off school-district appraised value and caps appraised value growth at 10% per year — the single highest-return paperwork move a new homeowner makes. File on or before April 30 of the year following purchase.

North Austin Growth Corridor

Williamson County is one of the fastest-growing US counties, anchored by Round Rock (largest, ~135,000), Cedar Park, Leander, Georgetown (county seat), Hutto, and Pflugerville (shared with Travis County). Dell Technologies HQ, Samsung Austin Semiconductor (under construction at Taylor), and the broader Austin tech corridor drive housing demand. Round Rock ISD, Leander ISD, Georgetown ISD, Hutto ISD, and Taylor ISD serve the county. Williamson County’s Austin-MSA AMI puts the 115% Heroes ceiling at ~$157,550 for a 4-person household — the highest in Texas. See Travis County guide for adjacent Austin context.