Denton CAD vs Collin CAD: Is Frisco in Collin or Denton County?

By Hilda Avila, REALTOR®, Ebby Halliday Real Estate, LLC, TREC #803801. Updated Oct 27, 2026.

Short answer: Frisco is in both Collin County and Denton County. Homes on the Collin County side are appraised by the Collin Central Appraisal District (Collin CAD), and homes on the Denton County side are appraised by the Denton Central Appraisal District (Denton CAD). Plano, Prosper, and Celina are split the same way, so always check the exact address.

When people move here, the county line surprises them. You can drive across Frisco without noticing it, but it decides who appraises your home for property taxes, which county taxing units apply, and where you file certain paperwork. Here’s how I explain it to my clients.

Which county and appraisal district is my city or ZIP in?

Frisco, Plano, Prosper, and Celina each sit in both Collin County and Denton County, so each has two appraisal districts: Collin CAD and Denton CAD. Allen and McKinney are in Collin County only, so Collin CAD covers them. Some ZIP codes cross the county line, so confirm your own address in the CAD’s property search.

Cities

ZIP codes

ZIP codes and county lines do not line up exactly, so a ZIP in this table can include addresses on the other side of the line, and some ZIPs include more than one city. The county column comes from the U.S. Census Bureau’s 2020 ZIP Code Tabulation Area (ZCTA) files, which approximate USPS ZIP codes but are not identical to them, and from 2020 geography. Confirm your address in the property search: Collin CAD property search or Denton CAD property search. Collin CAD also has an online map.

Source: Texas Comptroller county directories (Collin CAD taxing-unit list updated 07/15/2026; Denton CAD list updated 09/25/2026), U.S. Census Bureau 2020 county and place relationship files, and each city’s own tax page. Checked November 9, 2026. For tax rates, see North Dallas property tax rates for 2026.

Once you know your county, you can see what homes near you are worth on Frisco, Plano, McKinney, or Allen home value pages, or request a home valuation.

Denton CAD vs Collin CAD: what’s the difference?

Here’s the part that surprises people: the two appraisal districts do the same job. Each one is a separate local office that:

• sets the appraised value of property in its county for property-tax purposes,
• processes exemption applications, such as the residence homestead exemption, and
• handles value protests through its appraisal review board (see how to protest your property tax appraisal in Collin and Denton County).

What differs is which homes they cover and their own websites, forms, and timelines. If your home is on the Denton County side of Frisco, you deal with Denton CAD (dentoncad.com). If it’s on the Collin County side, you deal with Collin CAD (collincad.org).

What neither CAD does

Neither appraisal district sets your tax rate. Each taxing unit on your address does that: the county, the city, the school district, a college district, and any MUD or PID. Your bill is the sum of those layers. I broke down the 2026 rates by city and district in my 2026 property tax rates post.

How to check which county your home is in

Don’t rely on the city name or ZIP code. ZIP codes can cross county lines. Here’s what I do instead:

1. Search the address on both CAD websites. Your home will show up on the one that appraises it.
2. Look at a recent property tax statement. It lists the taxing units on the property, including the county.
3. For a home you’re buying, check the title commitment and the seller’s tax information. Your agent and title company will confirm the taxing units before closing.

What changes for buyers

The county line can matter more than people expect when you’re shopping:

• The tax picture. County, college, and sometimes school district layers differ by side. Two homes a few streets apart can have different total rates.
• School district by address. The district depends on the address, not the city name. Check the district’s own boundary tool before you write an offer.
• Where you file your homestead exemption. Once the home is your principal residence, you file Form 50-114, Application for Residence Homestead Exemption, with the appraisal district for your county: Collin CAD or Denton CAD. The general deadline is before May 1 of the tax year. If you buy after Jan. 1, you may still get the exemption for the part of that year you own the home, as long as the previous owner didn’t claim it.
• Special districts. Some newer areas on both sides of the line are in a MUD or PID, which adds to the bill. Ask about it early. I cover this more in Resale vs. new construction in Collin County.

What changes for sellers

• Your CAD value isn’t your market value. The appraisal district’s number is set for taxes, and it often differs from what a buyer might pay. That’s true on both sides of the line.
• Buyers compare homes, not county lines. When I prepare a pricing analysis in Frisco or Plano, I look at comparable homes nearby. Then I note the county, school district, and tax differences, because buyers will ask.
• Have your tax info ready. Buyers often want to know the current taxing units and exemptions on the property. Having that ready saves time.

If you’re curious how local sales shape value in a split city, my Frisco home value page and Plano home value page walk through it. You can also request a custom home valuation. It’s not an appraisal.

For current market numbers, see my Collin County home prices, fall 2026 post and my Frisco housing market update.

Frequently asked questions

Is Frisco in Collin or Denton County?

Both. Frisco sits in Collin County and Denton County. Homes on the Collin County side are appraised by the Collin Central Appraisal District, and homes on the Denton County side are appraised by the Denton Central Appraisal District, so check which county your address is in.

What is the difference between Denton CAD and Collin CAD?

They do the same job for different areas. Each sets appraised values for property taxes, handles exemptions, and hears value protests for homes in its own county. The Denton Central Appraisal District covers Denton County, and the Collin Central Appraisal District covers Collin County.

Does the appraisal district set my property tax rate?

No. The appraisal district sets your property’s appraised value. Each taxing unit, such as the county, city, school district, college district, and any MUD or PID, sets its own rate. Your bill adds those layers together.

Is my appraisal district value what my home would sell for?

Not necessarily. The appraisal district’s value is set for property taxes and often differs from what a buyer might pay. A market value estimate uses recent comparable sales, condition, and features.

How do I protest my appraised value in Collin or Denton County?

You file a protest with the appraisal district for your county, Collin CAD or Denton CAD. In most cases, the deadline is May 15 or 30 days after the district mails your notice of appraised value, whichever is later. Your notice and the district’s website explain how to file.

What county is Frisco in?

Frisco is in both Collin County and Denton County. Collin CAD appraises the Collin County part of the city, and Denton CAD appraises the Denton County part. Based on 2020 Census ZIP data, 75035 is in Collin County, 75036 is in Denton County, and 75033 and 75034 cover both, so check your exact address.

What county are Prosper and Celina in?

Prosper and Celina are each in both Collin County and Denton County. Collin CAD appraises the Collin County side, and Denton CAD appraises the Denton County side. Per 2020 Census ZIP data, 75078 (Prosper) and 75009 (Celina) each cover both counties, so check your exact address before assuming a county.

What is Frisco CAD, and which appraisal district covers my Frisco address?

There is no separate Frisco CAD. Appraisal districts follow county lines, so a Frisco home is appraised by Collin CAD or Denton CAD, depending on which county the address is in. Search your street address on both websites to see which one lists your home, then use that district for exemptions and protests.

What is Celina CAD?

There is no separate Celina CAD. Celina is in both Collin County and Denton County, so a Celina home is appraised by Collin CAD or Denton CAD, depending on which county the address is in. ZIP 75009 covers both counties, so search your street address to confirm.

What is Prosper CAD?

There is no separate Prosper CAD. Prosper is in both Collin County and Denton County, so a Prosper home is appraised by Collin CAD or Denton CAD, depending on which county the address is in. ZIP 75078 covers both counties, so search your street address to confirm.

Want a second set of eyes on an address?

If you’re weighing homes on both sides of the county line, I’m happy to help you sort out the taxing units and school district for each one. You can book a time to talk through your game plan.

This post is general information, not tax or legal advice.

Hilda Avila, REALTOR® · Ebby Halliday Real Estate, LLC · TREC #803801 · Broker #257740
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