Lewisville TX Property Taxes and Your Mortgage Payment — 2026

I'm Bond Peter Njoku (NMLS #2670329), and Lewisville is a Denton County suburb with real range — older ranch homes near Old Town and Lake Lewisville in the high $200,000s, and newer construction in Castle Hills that runs well into the $400,000s and beyond. The 2026 median lands around $350,000. Denton County's combined effective property tax rate runs about 1.8% of assessed value, which is friendlier than the 2.0–2.2% you would pay in Dallas or Tarrant. But Lewisville has one wrinkle that trips up buyers: parts of Castle Hills and a few other newer sections sit inside a public improvement district that adds an assessment on top of the base rate. Miss it and the payment jumps at closing. Catch it early and you price around it.

What is the property tax rate in Lewisville TX for 2026?

Your Lewisville tax bill combines Denton County, the City of Lewisville, Lewisville ISD, and the county's hospital and college districts. Combined, the effective rate lands near 1.8% for 2026. On top of that, homes inside the Castle Hills PID — and a handful of other master-planned sections — carry a separate annual assessment that repays the infrastructure bonds for that development. It shows up on the same statement and is collected through your escrow, so functionally it raises your monthly payment. I check every property through the Denton Central Appraisal District (DCAD) and confirm whether a PID or MUD applies before I quote anything, because that single line can swing the escrow by $80–$150 a month.

How much does a mortgage cost in Lewisville TX, taxes included?

Full math on a $350,000 Lewisville home — near the 2026 median — with 10% down ($35,000) on a 30-year loan at 7.0%:

• Principal & interest: $315,000 loan → about $2,096/month
• Property taxes: $350,000 × 1.8% = $6,300/year → about $525/month
• Homeowners insurance: roughly $155/month in Denton County
• Full PITI payment: approximately $2,776/month before homestead exemption
• Add a Castle Hills PID: commonly another $80–$150/month on top

That $525 tax figure is escrowed — your servicer collects one-twelfth monthly and pays Denton County when due. The same $350,000 home in Collin County at roughly 1.5% would escrow about $438/month, and in Tarrant County at 2.2% about $642/month, so Lewisville's rate saves $55–$117 a month versus those counties on an identical price — before any PID.

On down payment, a $350,000 Lewisville home is $12,250 at FHA's 3.5% minimum, $17,500 at 5% conventional, or $35,000 at 10%. Set aside another 2–3% of the price — roughly $7,000 to $10,500 — for closing costs and prepaid escrows.

How much does the homestead exemption save me in Lewisville?

Once the home is your primary residence, you file a general homestead exemption with DCAD. The state exemption removes $100,000 of value from school-district taxation, and the City of Lewisville and Denton County each apply an additional percentage-based homestead exemption on their portions. On a $350,000 home taxed near 1.8%, the school-district portion of the state exemption saves close to $1,000 a year, and combined with the local percentage exemptions total annual savings generally land between $1,150 and $1,750. The homestead exemption does not reduce a PID assessment — that repays bonds and stays fixed on its schedule — but it does cut the ad valorem portion. File the form within 90 days of closing so no tax year is missed.

Do Lewisville property taxes affect what mortgage I qualify for?

Yes. Your debt-to-income ratio is calculated on the full PITI payment, so Denton County's 1.8% rate — plus any PID assessment — lowers your qualifying loan amount. On a $350,000 Lewisville home, the $525/month tax escrow weighs on your DTI about like an extra $79,000 of loan principal, and a Castle Hills PID adds meaningfully to that. I run every Lewisville pre-approval with the true rate and any special-district assessment for the exact address. If your ratios are close, an FHA loan in Lewisville gives you more DTI headroom than conventional financing.

What other exemptions can lower my Lewisville tax bill?

Owners 65 and older get an additional homestead exemption plus a Lewisville ISD school-tax ceiling that freezes the district portion of the bill. Disabled homeowners qualify for a similar exemption, and disabled veterans receive a partial-to-total exemption scaled to VA disability rating. Every Lewisville owner can also protest the appraised value with DCAD each spring — the informal hearing with recent comparable sales is the most effective path, and a successful protest lowers your escrow for as long as you own the home. Denton County has been appreciating fast, so appraisals often run ahead of a documented comp set; protesting most years is worth the hour.

How do I keep my Lewisville mortgage payment manageable despite the tax rate?

Before you write an offer, confirm whether the home is inside a PID or MUD — that one check can spare you a $100-plus monthly surprise, and if it is, price your target down to keep the total payment where your budget needs it. File the homestead exemption the week you close for the year-two adjustment. On financing, weigh a permanent buydown with discount points against a seller-funded 2-1 temporary buydown; Lewisville has enough newer inventory that concessions are common. And protest the DCAD value every spring. None of this touches the 1.8% rate itself, but together the moves keep the payment inside your budget.

A recent Lewisville example

This spring I helped a couple relocating from out of state for jobs near the Lake Lewisville corridor. They fell for a $345,000 home in Castle Hills, credit in the mid-700s, planning 5% down on a conventional loan. When I pulled the DCAD record it sat inside the PID, which added roughly $120/month to the tax escrow beyond the base Denton County rate. Because we found it before the offer went in, they shifted their search to a comparable non-PID section a few streets over, kept the same $345,000 budget, and their total PITI came in about $120/month lower than the Castle Hills version would have been. They filed the homestead exemption the week they moved in. My Texas property tax guide explains how escrow accounts re-analyze each year, and my mortgage calculators let you model different prices and down payments. For your real Lewisville number — PID checked — see my Lewisville loan page or call me.