Move-up families touring Harvest or Canyon Falls almost always ask me the same question a few weeks in: "Why is my estimated payment so much higher than the sticker price suggested?" The answer is almost always the same three letters. MUD.
Nobody hands you the MUD math on the model home tour. You find out about it in your loan estimate, or worse, after you've already fallen for the floor plan. Here's what it actually costs, where it applies, and how to check before you're emotionally attached to a lot number.
What a MUD tax actually is (and why Argyle has so many)
A Municipal Utility District is a special taxing entity that funds the water, sewer, drainage, and road infrastructure inside a new development before the city takes it over. Builders use MUDs to get infrastructure built fast in growing areas like Argyle, and the bonds that pay for it get repaid through a separate line item on your property tax bill, on top of the town, county, and school district rates you're already paying.
This is not unique to Argyle. It's standard practice across fast-growing parts of Denton County. But Argyle has a lot of it right now because so much of its new inventory (Harvest, Canyon Falls, and several smaller subdivisions) was built out this decade specifically to keep up with demand from Flower Mound and Southlake overflow.
A MUD tax typically adds $0.50 to $1.00 or more per $100 of assessed value. That can push a home's effective tax rate from the 1.7% to 1.8% range you'd see in older, established Argyle up into the 2.5% range or higher. MUD bonds are long-term obligations, usually 20 to 30 years, and while the rate can ease as the district matures and property values rise, it rarely disappears before the bonds are retired.
The real numbers: Harvest, Canyon Falls, and Argyle proper
Here's how it plays out on an actual home value, using publicly reported effective rates for these areas:
- Older Argyle proper (no MUD): roughly 1.70% to 1.82% effective rate. On a $650,000 home, that's about $11,050 to $11,800 a year.
- Canyon Falls (MUD-affected lots): roughly 2.54% effective rate on the same $650,000 home works out to about $16,500 a year, meaning MUD-affected buyers pay something like $5,460 more per year, or about $455 a month, than they would on an identical home outside the district.
- Harvest: the community's Public Improvement District, or PID, was dissolved in October 2024, so new buyers there aren't paying the PID assessment that earlier buyers did. That's genuinely good news. But a MUD assessment is a separate tax from a PID, and it can still apply depending on the section of Harvest and the lot. Don't assume "no PID" means "no MUD."
On top of the tax line, Harvest also carries an HOA, with dues around $92 a month on some lots (a portion of which bundles in Frontier internet service). That's a separate cost from the MUD or PID and shouldn't get lumped into the tax conversation, but it belongs in your total monthly number.
Canyon Falls adds one more wrinkle worth knowing about: the community actually straddles Argyle, Northlake, and unincorporated Denton County. That means the city you're taxed by, the school district you're zoned to, and the specific fee structure can change from one section of the neighborhood to the next. You cannot assume two homes a quarter-mile apart carry the same numbers.
You have a legal right to see this before you sign
Texas doesn't leave you guessing here. Under Water Code Chapter 49, a seller (including a builder) is required to give you a formal MUD Notice before you execute the contract, or as a signed addendum at the time you sign. If that notice isn't delivered on time, you have the right to terminate the contract and get your earnest money back.
TREC consolidated the paperwork in 2024 into a single form, Notice to Purchaser of Special Taxing or Assessment District, so you should see one document instead of several. PIDs carry a similar requirement under the Property Code, with their own termination rights if the notice is late.
In practice: don't sign anything before you've actually read the MUD or PID notice line by line, and don't take a builder rep's verbal summary of "it's not that much" as the final answer. Pull the actual rate.
How to compare two homes before you commit to one
The sticker price on a new-construction home in Argyle almost never tells you the real monthly number. Here's the check I walk clients through before they write an offer on anything in Harvest, Canyon Falls, or one of the smaller new subdivisions:
- Get the specific tax rate for that lot, not the neighborhood average, from the Denton County Appraisal District's special districts layer. Rates can vary block to block in split communities like Canyon Falls.
- Ask directly whether the lot sits in an active MUD, a dissolved PID, or both. Harvest's PID dissolution in 2024 is a real cost improvement, but it only tells you half the story.
- Add the HOA separately. Don't let a builder's "low tax rate" pitch distract from a $90 to $150 monthly HOA that's doing the same thing to your payment from a different direction.
- Run the full comparison against a resale home in older Argyle or a Flower Mound neighborhood without a MUD, so you're comparing your actual out-the-door monthly payment, not just the list price.
None of this means new construction in Argyle is a bad move. For a lot of move-up families, the amenities, the newer schools capacity, and the ability to customize a floor plan are worth the extra few hundred dollars a month. But this should be a decision you make with the real number in front of you, not one you back into three months after closing.
Your specific comparison depends on the lot, the builder, and how the rest of your move (including what you're netting from your current home) fits together. That's exactly the kind of math I run with clients before they write an offer, not after.
Frequently Asked Questions
Do all new-construction homes in Argyle have MUD taxes?
No. It depends on the specific community and sometimes the specific section within a community. Harvest and Canyon Falls both have MUD-affected lots, but older, established parts of Argyle generally do not. Always confirm the rate for the exact address, not the neighborhood in general.
Is a MUD tax the same as a PID assessment?
No. A MUD tax is based on your property's assessed value and shows up as an ongoing rate on your tax bill, similar to a school district tax. A PID assessment is typically a fixed amount tied to the lot itself, sometimes payable upfront or financed over 20 to 40 years. Harvest's PID was dissolved in October 2024; that doesn't affect any separate MUD tax on the property.
Will my MUD tax rate go down over time?
It can, as the district matures, more homes are built out, and total assessed value rises. But MUD bonds are long-term obligations, typically 20 to 30 years, and the tax generally doesn't disappear until the bonds are paid off.
What happens if the builder doesn't give me a MUD notice before I sign?
Under Texas Water Code Section 49.452, if a required MUD notice isn't delivered before you execute the contract (or as a signed addendum at signing), you have the right to terminate the contract and recover your earnest money. Read the notice before you sign anything.
Does Flower Mound have the same MUD tax issue as Argyle?
Some Flower Mound new-construction communities, including Furst Ranch, carry their own MUD and PID structures with different numbers. If you're weighing Argyle against a Flower Mound new-construction option, the math needs to be run separately for each.
If you're weighing new construction in Harvest or Canyon Falls against a resale home, or trying to figure out how the numbers actually pencil out once you factor in what you'll net from your current house, schedule a free Move-Up Strategy Call: https://calendar.app.google/97azYbhaxPMgw2qq7. Thirty minutes, no pitch, just a clear-headed look at where you are and what your best next move looks like.
About Brian White
Brian White helps families in Northwest DFW make their move-up cleanly, selling and buying in one synchronized step. He built BlueFuse Group on a simple standard: other-first service, proactive at every turn, faith and excellence in equal measure. Brian has been married to Tisha for 27 years and is dad to three adult sons. When he's not protecting a family's equity or untangling a tight closing timeline, you'll find him chasing a round of golf or at Valley Creek Church.
Schedule a Move-Up Strategy Call (https://calendar.app.google/97azYbhaxPMgw2qq7) — no pitch, just a clear-headed look at your next move.
