Emotional Support Animal (ESA) Letters in Mills, WY

Four hundred and sixty households, and every one of them rents

Mills sits on the western edge of Casper, in Natrona County, and it holds the smallest rental market of the twenty Wyoming cities covered here. The Census Bureau’s 2020–2024 American Community Survey five-year estimates put 460 renter-occupied homes in town, give or take 127, fewer than any other city on the list. Out of 1,847 occupied households in a population of 4,584, that works out to a 24.9 percent renter share against 28.2 percent statewide, eighteenth of the twenty.

Price does not follow size. The median gross rent estimate here is $1,073, plus or minus $75, above the $992 Wyoming median and third-highest of the twenty. Only six of those cities rent above the state figure, and this is one.

Small market, high price, and, for anyone who owns the home and rents the ground beneath it, two Wyoming statutes that answer the same question in opposite directions.

The same tenant, defined twice

Wyoming has one statute about renting and another about discrimination in housing. They do not share a vocabulary, and on one particular tenancy they part company outright.

W.S. 1-21-1201(a)(iv), in the Residential Rental Property Act, defines a “residential rental unit” as a renter’s principal place of residence: “excluding a mobile home lot or recreational property rented on an occasional basis.”

W.S. 40-26-102(a)(vii), in the Wyoming Fair Housing Act, defines “dwelling” so that it “includes a lot leased for the purpose of placing on the lot a transportable home.”

One writes the leased lot out by name. The other writes it in by name. A Wyoming tenant on leased ground is outside one Act and inside the other at the same moment, and which is which decides where the argument has to be made.

What the exclusion takes away

Start with the subtraction. If the tenancy is ground rather than a unit, the Residential Rental Property Act’s machinery does not reach it:

• W.S. 1-21-1208(a), the deposit section: balance and written itemization within thirty days of termination or fifteen days after the owner has the renter’s new mailing address, whichever is later, extended by another thirty days where there is damage.
• W.S. 1-21-1207, which requires a rental agreement to state whether any part of a deposit is nonrefundable and requires written notice when the deposit is taken.
• W.S. 1-21-1202(a), the habitability duty: safe, sanitary, fit for human habitation, with operational electrical, heating and plumbing systems and hot and cold running water unless the parties agree otherwise in writing.

None of that was ever an assistance-animal provision. Neither “pet” nor “animal” occurs anywhere in W.S. 1-21-1201 through 1-21-1211, so nothing about an animal leaves with the exclusion. It still matters: nothing in a Wyoming lot tenancy can be argued from the rental act.

What the Fair Housing Act hands back

Now the inclusion. Because W.S. 40-26-102(a)(vii) puts the leased lot inside the definition of “dwelling,” everything the Wyoming Fair Housing Act does for a dwelling it does for that lot.

That starts with W.S. 40-26-107(c)(ii), which makes discrimination out of “a refusal to make a reasonable accommodation in rules, policies, practices or services if the accommodation may be necessary to afford the individual equal opportunity to use and enjoy a dwelling.” A no-animals rule on the property is a rule. The accommodation is an exception to it. The lot is a dwelling because the definition says the word.

It brings W.S. 40-26-107(b) with it: the terms, conditions and privileges of a rental, and the services and facilities that go with it, which is where a recurring animal charge lands. And it brings the boundary at W.S. 40-26-107(f): no duty where the tenancy would be a direct threat to the health or safety of other individuals, or would cause substantial physical damage to the property of others.

The provision that never used either definition

There is a third statute, and it answers to neither Act’s dictionary. W.S. 35-13-201(c) says a person “shall not be discriminated against in the leasing or rental of residential property because the person has an assistance animal, which shall be permitted in leased or rented residential property in accordance with the federal Fair Housing Act.”

Residential property. Not “residential rental unit.” Title 35 sets its own terms and is not limited by the Residential Rental Property Act’s definitions at all, so the carve-out in W.S. 1-21-1201(a)(iv) has nothing here to bite on.

W.S. 40-26-113(b) closes the loop from the other direction: the Fair Housing Act chapter “does not affect a requirement of nondiscrimination in any other state or federal law.” Whatever Title 35 requires, Title 40 leaves standing beside it.

The animal Wyoming names outright

W.S. 35-13-205(a)(iv) defines an “assistance animal” as one that works, provides assistance or performs tasks for a person with a disability, “or provides emotional support that alleviates one (1) or more identified symptoms or effects of a person’s disability.”

That second branch is the emotional support animal, written into Wyoming law by description, with no training attached to it. And because the definitions section opens “As used in this article,” it governs W.S. 35-13-201(c) in the same article, the leasing sentence itself. Underneath both sits the federal duty at 42 U.S.C. § 3604(f)(3)(B).

Why the request carries more weight on a lot, not less

Put the two definitions together and the practical conclusion is not the discouraging one. On a leased lot the landlord-tenant statute is thin: no itemization deadline, no disclosure rule, no habitability section. The statute that still travels with the tenant is the fair-housing one, and the fair-housing statute works through a request.

So the accommodation request is not one option among several here. It is the mechanism. Put it in writing, name W.S. 40-26-102(a)(vii) first because the definition is the whole point, then W.S. 40-26-107(c)(ii), W.S. 35-13-201(c) and the federal provision, and attach documentation from a licensed professional. Keep a dated copy. Wyoming has no agency holding a file on your behalf.

Read the second sentence of W.S. 35-13-201(c) while you are in there: the tenant “shall be liable for any damage done by his assistance animal to the premises or facilities.” Liability after the fact. Not a price for permission.

Where a Mills renter turns

Mills has no housing authority of its own. The Casper Housing Authority, at 140 East K Street, is the nearest of Wyoming’s six public housing authorities; whether it is the right office for a particular household is a question to put to it directly rather than assume. The Town of Mills and Natrona County are the local government contacts, and Legal Aid of Wyoming takes housing matters statewide.

What none of them is, is a fair-housing enforcement agency. Wyoming has designated none, and the Wyoming Advisory Committee to the U.S. Commission on Civil Rights reported in January 2025 that residents “are required to submit their complaint to the HUD’s Denver Regional Office in the neighboring state of Colorado.” The court route is separate: W.S. 40-26-139 allows a civil action in district court within two years, with nothing to exhaust first.

What has to be in your hand before any of it works

The accommodation duty does not operate on a bare request. W.S. 35-13-205(a)(iv) asks for two things to be established: that a disability exists, and that this animal alleviates one or more identified symptoms or effects of it. Identified means named and specific, by someone licensed to name them.

If a clinician already treats you, begin there. They hold the history, and that makes their documentation the strongest version of this record available. Then weigh what the route costs. Wyoming’s specialist mental-health capacity thins out beyond Cheyenne, Casper and Laramie, a first appointment can sit weeks away, and a provider who has met you twice may say, reasonably, that they are not positioned to make a disability finding. That is professional judgment, and it leaves the two findings still unmade.

A licensed evaluation is that same assessment booked deliberately rather than hoped for. A licensed professional works out whether a disability exists, whether this animal answers an identified part of it, and issues documentation where the assessment supports it. Sometimes it does not, and the evaluation says so. That possibility is what separates the document from a certificate sold off a web form, which establishes neither finding, and which W.S. 35-13-203(b) makes a misdemeanor where someone knowingly and intentionally uses it to claim rights under the article.

Same lot, two statutes

The rental act steps back from a leased lot. The fair-housing act steps onto it and calls it by name. For a tenant who owns the home and rents the ground, that is the entire map: the protection that stays is the duty to accommodate, and the duty to accommodate runs on paper.

Two statutes, one lot. Get the document right and only one of them still has anything to say.