What is a MUD or a PID in a Texas subdivision?

A MUD is a municipal utility district and a PID is a public improvement district. Both fund water, sewer, roads and amenities in a Texas subdivision, and both add a line to the property tax bill that can change the monthly payment. Each has a TREC notice form that goes to the buyer in the transaction.

Why these exist at all

Texas grows at the edges. A developer buys raw land outside a city's utility system and has to put in water lines, wastewater treatment, drainage, streets and sometimes parks before a single house sells. That infrastructure costs real money up front, and the buyers who will use it do not exist yet.

A special district solves the timing problem. The district issues debt to build the infrastructure, and the property owners inside the district pay it back over time through a tax or an assessment on their property. The cost lands on the people who use it, spread over years, instead of entirely on the lot price at closing.

That is the honest case for them. The honest cost is that the buyer's tax bill is higher than an identical house outside the district, often by enough to change what the buyer can afford.

MUD and PID are not the same thing

MUD — municipal utility district. A political subdivision with its own board. It typically owns and operates water, wastewater and drainage infrastructure, and it levies a property tax the same way a city or school district does. It appears as its own taxing-entity line on the tax bill, with its own rate, and that rate can change year to year as the district's debt is paid down or new debt is issued.

PID — public improvement district. Created by a city or county to fund specified improvements in a defined area. A PID does not levy a property tax in the MUD sense; it imposes an assessment against the properties within it. TREC's own form language reflects the distinction — the form is titled an "Obligation to Pay Improvement District Assessment."

Two practical consequences follow from that difference.

A PID assessment often has a payoff — an outstanding principal balance attributable to the lot that can, in many districts, be paid off in a lump sum. Ask whether it can be, and what the balance is. A MUD tax generally cannot be prepaid away; it goes with the district.
Because a MUD levies a tax and a PID levies an assessment, they can show up differently on a tax statement and in a lender's escrow calculation. Confirm both with the tax office and the lender rather than assuming they are interchangeable.

Related special districts appear on Texas tax bills too — water control and improvement districts, groundwater conservation districts, emergency services districts. Same principle: another entity, another line, another rate.

The MUD notice is a statute, and its timing is the whole point

Disclosure of a MUD is not a courtesy. It is Texas Water Code Section 49.452, and the timing requirement is where the leverage sits.

The seller of property inside a qualifying district must give the purchaser written notice prior to execution of a binding contract of sale and purchase, either separately or as part of the contract, and the purchaser signs the notice — or the contract containing it — to evidence receipt (Texas Water Code 49.452).

Now the part that matters to a buyer. If the notice was not given before the contract, the seller may give it at closing instead — but a purchaser who proceeds at that point waives termination rights. The exit exists only in the gap between learning about the district and signing. Discovering the MUD in a closing package and signing anyway is a decision, whether or not it felt like one at the table.

The statute reaches districts providing water, sewer, drainage or flood control services that are financed by district bonds or standby fees and that cover less than all the territory in at least one county. The content of the notice itself is prescribed by Section 49.4521.

The section also carries an exemption list, quoted from the statute: "transfers of title under any type of lien foreclosure; transfers of title by deed in cancellation of indebtedness secured by a lien upon the property conveyed; transfers of title by reason of a will or probate proceedings; transfers of title to a governmental entity; or transfers of title for the purpose of qualifying a director." A foreclosure buyer, an heir and a governmental grantee do not get this notice, which means they do not get this warning.

How any of that applies to a specific transaction — particularly whether an exemption applies or whether a right was waived — is a question for a Texas real estate attorney, not an agent.

The PID notice is a different statute, with different words

PID disclosure runs through Texas Property Code Section 5.014. The seller must give the purchaser written notice before the effective date of a binding contract for the purchase of the property, and the buyer acknowledges receipt (Texas Property Code 5.014).

The notice says three things a buyer should read slowly:

The buyer is obligated to pay assessments to the municipality or county for the cost of a portion of a public improvement undertaken for the benefit of the property.
"AN ASSESSMENT HAS BEEN LEVIED AGAINST YOUR PROPERTY." Past tense. The obligation already exists; the buyer is inheriting it, not being offered it.
Failure to pay "may result in penalties and interest being added to what you owe or in a lien on and the foreclosure of your property."

That last clause is the reason this is not paperwork. An unpaid PID assessment is not a late utility bill. It is secured against the house.

Section 5.014 also carries exemptions, including foreclosure sales, bankruptcy transfers, transfers to family members, and transfers involving only groundwater rights or mineral interests.

Note the difference in the two trigger points. The MUD notice under 49.452 is keyed to execution of a binding contract; the PID notice under 5.014 is keyed to the effective date of a binding contract. They are drafted in different codes for different district types, and neither one is satisfied by a verbal mention at a showing.

The TREC forms that carry these notices

Two promulgated forms carry this in a transaction (TREC contract forms):

Addendum Containing Notice of Obligation to Pay Improvement District Assessment, form 53-0, effective 09/01/2021. This is the PID side — the form that delivers the Property Code 5.014 notice, including the levied-assessment language and the foreclosure warning.
Notice to Purchaser of Special Taxing or Assessment District, form 59-0, effective 02/12/2024. The notice given to a purchaser of property inside a special taxing or assessment district, which is the vehicle for the Water Code notice on the MUD side.

Read them. They are short, they are specific to the property, and they exist precisely because buyers were closing without understanding the obligation. A signed notice that nobody read is still a signed notice — and under 49.452, signing it at closing is what extinguishes the termination right.

The money is not a rounding error

Look at how the base stack already works before adding a district on top. In Kendall County, per $100 of taxable value:

Boerne ISD, 2025: 1.0109 — maintenance and operations 0.6969 plus debt 0.3140 (Kendall County)
City of Boerne, 2025: 0.4716 (Kendall County)
Kendall County, 2025: 0.377, and 0.373 for 2026 (Kendall County)
Comfort ISD, 2025: 0.9328

A district rate stacks on top of whichever of those apply to the parcel. That is why two houses with the same list price, the same square footage and the same school district can carry meaningfully different monthly payments. The difference is not in the house. It is on the tax bill, and it is permanent for as long as the district's obligation runs.

Do not take a district's rate from a listing, a builder's flyer or an old article. Pull it from the appraisal district and the tax office for the specific parcel, for the current year.

Districts in Kendall County

Kendall Appraisal District lists the taxing entities that appear on bills in the county. Among them are a Kendall County MUD and a Miralomas MUD, along with Kendall County WCID #1 and the Cow Creek Groundwater Conservation District, in addition to the county, the cities and the school districts (Kendall AD).

Boerne is in Kendall County, not Bexar County, and the appraisal district is Kendall Appraisal District — not Bexar CAD. That matters for this question because the entity list, the exemptions and the rates all come from Kendall AD.

The reliable way to find out what applies to a specific house: look the parcel up at kendallad.org and read the entity list attached to that account. Not the subdivision. Not the neighborhood. The parcel. District boundaries do not follow subdivision marketing names, and two lots across a street from each other can sit in different districts.

For rate documents the county publishes, start at Kendall County tax rate information.

What to ask before you are under contract

Is this parcel in a MUD, a PID, a WCID or any other special district? Confirm from the appraisal district account, not from a seller's recollection.
Has the statutory notice been delivered before the contract binds, rather than in the closing package? Under 49.452, that timing is the difference between having a termination right and waiving one.
What is the current rate or assessment, and what was it the last three years? A declining MUD rate and a rising one tell different stories.
For a PID: is there a payoff amount for this lot, and can it be prepaid?
Is the district's debt still being issued, or is it in repayment?
Does the lender's payment estimate include the district line? A pre-approval built on the wrong tax figure produces a monthly payment that changes at closing.
What does the district actually deliver — water and sewer, or amenities? Owners pay either way.

Where the line is

An agent can find the entity list, pull the rates and flag the notice forms. Questions about how a district assessment affects your tax position, deductibility or an investment analysis go to a CPA or tax advisor. Questions about the statutory notice, the lien, the district's debt instruments, a waiver of termination rights or the enforceability of an assessment go to a Texas real estate attorney. Exemption and valuation questions on the parcel go to Kendall Appraisal District. The payment math goes to your lender.

Questions about a specific property?

Call or text 830-446-3847 · Email heath.shepard@kw.com

This page explains how Texas special districts appear in a transaction. It is not legal or tax advice. For the tax consequences of a district assessment, talk with a CPA; for the statutory notice, the lien or a waiver of termination rights, talk with a Texas real estate attorney; for what applies to a specific parcel, contact Kendall Appraisal District.