Neighbor Demands Removal of Grandfathered Horses Over Fly Complaints

Attorney Answer

A single neighbor generally can't force you to remove horses that qualify as a legal nonconforming use — but you need to be able to prove that history, not just assume it.

Utah Code § 10-9a-511 protects legal nonconforming uses: if your horses were being kept on the property before the zoning changed to prohibit that use, you're generally allowed to continue that use even though it no longer complies with current zoning. The long history of animal use you've described on this property is exactly the kind of fact a nonconforming-use claim is built on.

Here's the catch: unless your city has adopted an ordinance presuming nonconforming uses are legal, the burden is on you, the property owner, to establish that the use existed before the zoning change and has continued without a lawful break since. A family understanding that it has "always been grandfathered" isn't the same as being able to document it if the city or a neighbor challenges it. In Carlsen v. Board of Adjustment of the City of Smithfield, 2012 UT App 260, 287 P.3d 440, a neighbor challenged a board of adjustment's recognition of an existing nonconforming animal-keeping use, and the Utah Court of Appeals declined to disturb the board's determination because it was supported by substantial evidence. That's a reminder that these disputes are decided first at the local board level, with real deference on review — so building your record there matters a great deal.

As for the fly complaints: a private nuisance claim is a separate legal theory from zoning, and it can exist independently of whether your use is a protected nonconforming use. Even a lawful, grandfathered use can potentially be challenged as a nuisance if it's unreasonably interfering with a neighbor's use of their own property — though a long-standing, established use that the rest of the neighborhood hasn't complained about is generally harder to prove as an unreasonable nuisance.

What you can do

1. Gather documentation showing horses or other animals have been kept on the property continuously since before the zoning change — old photos, aerial images, utility or tax records, dated statements from longtime neighbors. 2. Confirm with your city whether it has adopted an ordinance presuming nonconforming uses are legal, or whether you'll need to affirmatively prove the history yourself. 3. If the city or your neighbor formally challenges the use, be prepared to present your evidence to the board of adjustment, since that's typically where these disputes are decided first. 4. Keep records of the complaints and any communications from the neighbor's attorney, so you have a clear timeline if this heads toward a nuisance claim as well. 5. Talk to a Utah land-use or real estate attorney before responding to the neighbor's lawyer, so your nonconforming-use claim is presented correctly from the start.