Central Texas

Williamson County Mortgage Lender: Austin's Growth Spills North

Williamson County holds 752,827 people across 1,124 square miles directly north of Austin, and it has been among the fastest-growing counties in the United States for three decades. Its seat is Georgetown.

Nearly everything about lending here follows from one fact: most of the housing is new, and most of it was built inside a district. The subdivisions that absorbed Austin's overflow were financed by developers who issued bonds for water, sewer and roads, and those bonds are repaid by the people who now live there. A buyer comparing Williamson County to Travis County on price alone is comparing the wrong number.

The district stack, and why the listing's tax figure deceives

MUD taxes are common across the county's newer subdivisions and are levied on top of the city, the county, the school district and Austin Community College where it applies.

PID assessments appear in some communities instead of, or alongside, a MUD, and Texas law requires the seller to disclose one before you sign.

Emergency services districts cover areas without a city fire department.

A new MUD charges more than an old one. The rate declines as bonds are retired, which is why an established Round Rock subdivision can carry a materially lower district rate than a new one in Liberty Hill or Hutto.

Everything is escrowed and counted. Lenders qualify you against the full payment, so district taxes reduce the loan amount your income supports, not just your monthly comfort.

The Williamson Central Appraisal District sets the values all of that is billed against. File your homestead exemption in the year you buy — it caps annual increases in assessed value at 10% while you hold and occupy the home, which matters in a county appreciating this fast. The protest deadline is typically mid-May.

New construction, and locking a rate you cannot date

A large share of county purchases are new builds, and a build is not a resale with a later closing date.

Extended rate locks cost money, priced into the rate, and the cost scales with the length.

Ask about a float-down by name, so you can capture a lower market if rates fall during construction.

Completion dates slip. A lock that expires before the certificate of occupancy issues means re-pricing at whatever the market is that week.

First-year taxes are assessed on the lot. The finished house lands on the roll the following year, so escrow for the completed value from the start or face a shortage and a payment jump in year two.

The builder's lender will offer an incentive. It may well be worth taking — compare Loan Estimates issued the same day for the same program and lock. Our Manor page works through that comparison.

Relocation files, which are a large share of volume

The semiconductor and technology employment along the county's southern and eastern edges brings buyers from out of state, often carrying a house somewhere else.

Both payments count unless the departing home is under firm contract or documented as a rental with a signed lease and evidence of the deposit.

Restricted stock and bonus income need a documented history to be usable, and the rules differ by program.

A relocation package that pays costs can change the structure meaningfully; tell your lender about it at application rather than at closing.

Buying before selling has four workable structures, set out on our Circle C Ranch page.

Which programs fit Williamson County

Conventional financing carries most of the market, with the 2026 conforming limit at $832,750 for a single-family home.

FHA is widely used in Hutto, Taylor and the eastern county; the 2026 national floor is $541,287 and HUD publishes the county figure.

VA lending is steady, with Fort Cavazos an hour north in Bell County.

Jumbo appears in west Georgetown, Steiner-adjacent west Leander and parts of Cedar Park.

USDA eligibility survives in the county's rural north and east, by address rather than by county, and is worth checking around Granger, Thrall and Bartlett.

DSCR financing supports the investor market along the growth corridor; see DSCR loans.

Where people buy

Round Rock, the county's largest city, holds established 1990s and 2000s subdivisions and has its own guide.

Georgetown, the county seat, pairs a historic square with large volumes of new construction on the northern edge.

Cedar Park and Leander run up the western side along US 183, both covered separately.

Hutto and Pflugerville's Williamson County portion sit along the SH 130 corridor to the east.

Liberty Hill and the northwest are where the current build-out is most active, and where district rates run highest.

Taylor, Granger and the eastern county hold older housing, farmland and the county's remaining USDA-eligible addresses.

Neighbouring counties

Williamson borders Bell, Milam, Lee, Bastrop, Travis and Burnet. Our Travis County page covers the metro's core to the south, and Bell County the military market to the north.

Towns and cities we lend in across Williamson County

Round Rock, Georgetown, Cedar Park and Leander carry most of the population. Hutto, Taylor and Granger run east along the SH 130 and US 79 corridor. Liberty Hill and Bertram's county edge sit northwest where the build-out is most active. Florence and Jarrell line I-35 to the north at lower prices. Brushy Creek and Jollyville are large unincorporated communities, and Thrall and Coupland remain farming towns.

Assistance programs that reach Williamson County

TDHCA and TSAHC reach every address in the county, with the Homes for Texas Heroes programme widely used by the teachers and first responders employed across its fast-growing school districts. Several Williamson County cities have administered their own assistance. In the rural east and north, USDA financing is frequently worth more than any grant, because it addresses the down payment directly for buyers inside the income limits — and eligibility reaches closer to the metro here than most buyers expect.

Frequently asked questions

Who are the best mortgage lenders in Williamson County, TX? For a new build, the ones with workable extended locks and the willingness to price against a builder incentive. For a relocation, the ones that handle departing-residence and equity-compensation rules cleanly. Those are different strengths, which is why we shop a panel.

What is a MUD tax in Williamson County? A municipal utility district tax repaying the bonds that funded a subdivision's water, sewer and roads. It is added to your city, county and school rates, escrowed with them, and counted in your debt-to-income ratio.

Why is my Williamson County tax bill higher in year two? Because the first bill was likely assessed on the lot alone. Once the finished house is on the roll, the assessed value and the escrow reflect the whole property.

Do I have to use the builder's lender? No. Builders can offer incentives but cannot require it. Compare Loan Estimates from both on the same day, for the same program and lock period.

Can I get a USDA loan in Williamson County? In parts of the rural north and east, yes. Eligibility is determined by address, so a property near Granger or Thrall may qualify while one a few miles west does not.

How long should I lock on a new build here? Long enough to cover the realistic completion date with margin, and ask what an extension costs and whether a float-down is available before you commit.

Which appraisal district covers Williamson County? The Williamson Central Appraisal District, which sets values and handles exemptions and protests, typically with a mid-May deadline.

Is Williamson County cheaper than Travis County? Often on price and not always on payment. Williamson County housing is newer and typically costs less per square foot, but a large share of it sits inside a MUD or carries a PID assessment that a comparable Travis County address may not. Compare the total monthly figure with the district charge included before concluding anything.

What is the difference between a MUD and a PID? A MUD is a taxing district that levies a rate, which declines over time as its bonds are repaid. A PID is an assessment, often a fixed annual amount over a set term, and it is sometimes billed separately from your property taxes. Both are counted by lenders in your debt-to-income ratio.

Should I buy a new build or an existing home in Williamson County? A new build gives you builder warranty coverage and current construction standards, usually with a district charge and a longer rate lock to arrange. An existing home in an established subdivision often carries a lower district rate because those bonds are further along. The comparison is total cost of ownership rather than price alone.

Is Georgetown or Round Rock better for buying? They differ in housing age and character rather than quality. Round Rock's stock is largely 1990s and 2000s with mature districts and correspondingly lower district rates; Georgetown pairs a historic core with large volumes of recent construction on its edges, where district charges are more common. Compare total monthly cost on specific addresses.

Get the district rate before you fall for the floor plan

In Williamson County two identical houses can carry very different payments. Send us the address and we will price the real one.

Start your application · Run the numbers · Call 512-588-2771

Neighbouring Counties