If a San Dimas listing says "horse property," does that guarantee you can keep a horse there? Not automatically. It depends on a line on the zoning map that most buyers never think to ask for, and the city's own Western-town branding makes it easy to assume the answer is yes everywhere.
San Dimas has earned its reputation. The downtown storefronts lean Western, Frank G. Bonelli Regional Park runs an equestrian center and trail network around Puddingstone Reservoir, and the hills above town are threaded with staging areas built for horse trailers. It is a real identity, not a marketing trick. But the identity is citywide and the zoning is not. The actual legal right to keep a horse on your own residential lot in San Dimas comes from a specific overlay in the municipal code, and it applies to a narrower set of parcels than the city's reputation suggests.
The overlay that decides it
The relevant section is Chapter 18.112 of the San Dimas Municipal Code, which creates what the city calls the P-H Private Horse Overlay Zone. The code is explicit about what the designation is for: it exists for parcels the city considers "peculiarly suitable" for horse-keeping, and it layers additional permissions on top of whatever the underlying residential zoning already allows. That word "overlay" is doing real work here. A P-H designation doesn't replace your base zoning. It sits on top of it, and it only applies where the city has specifically mapped it in.
That distinction matters because a large lot on its own tells you nothing about horse rights. A quarter-acre lot with a P-H suffix on the zoning map can keep horses. A two-acre lot without that suffix cannot, at least not without a variance process most buyers don't want to take on faith before closing.
The numbers that trigger a second horse
Once a parcel does carry the P-H designation, the code sets out a size-based ladder for how many horses it can support. The starting threshold is 11,000 square feet, and the allowance scales from there.
| Parcel size | Horses permitted |
|---|---|
| 11,000 sq ft (minimum) | Up to 2 |
| 21,000 sq ft | Up to 3 |
| Each additional 7,500 sq ft beyond 21,000 | +1 horse |
| Any size | Capped at 5 horses per acre |
A registered horse breeder can add three more horses for breeding purposes with a separate permit, but that's an exception layered on an already-specific base rule, not a loophole that expands the overlay itself.
What the lot has to physically accommodate
The ordinance doesn't stop at counting horses. It specifies the built environment around them:
- A corral of at least 300 square feet for the first horse, plus 200 additional square feet for each horse after that
- Corral placement no closer than 35 feet from any residence on the same parcel, and at least 80 feet from a residence on the adjacent lot
- Fencing at least five feet high, built to actually confine the animal
- A stable with a weatherproof roof, sized at 60 square feet for the first horse and 36 additional square feet per horse after that
Read those setback numbers against a typical San Dimas residential lot and the practical reality becomes clear. An 80-foot buffer to a neighbor's house is not a backyard afterthought. It requires either genuine acreage or a specific lot shape that keeps structures clustered away from the property line, which is exactly why the overlay maps to particular pockets of the city rather than spreading evenly across it.
Where the overlay actually lives
The clearest concentration sits in the Via Verde and Walnut Creek corridor near Bonelli Park, where lots run larger and several properties back directly onto the county's equestrian trail system. A 2.12-acre listing on Scarborough Lane that came to market in July illustrates what a fully built-out equestrian parcel looks like in that corridor: a six-stall barn with tack and hay storage, a former dressage arena, a wash rack, a hot walker, and direct access to the Walnut Creek Trail from the property line. That is not a hypothetical horse property. It is a parcel where the zoning, the lot size, and the infrastructure all line up.
There is also a dedicated community built around the designation itself, the San Dimas Equestrian homeowners association, managed by Personal Touch Property Management. An HOA name built around the word "equestrian" is a reasonable signal, but it is still worth confirming the individual parcel's zoning rather than assuming every home inside an HOA boundary carries the same overlay.
If your lot doesn't qualify, San Dimas still gives you the trails
Plenty of buyers want the equestrian lifestyle without taking on the setback math, the corral construction, or the daily feeding and mucking that comes with keeping a horse at home. San Dimas has real infrastructure for exactly that. The Walnut Creek and Antonovich Trail runs from San Dimas Avenue to Reeder Avenue with several stream crossings and staging areas for trailers at Lyman and Valley Center. Bonelli Regional Park adds its own trail network around Puddingstone Reservoir, with dedicated equestrian staging near the park's main entrance. Horsethief Canyon Park, on the north side of town, routes past an equestrian center on its way into the hills.
For buyers who want to ride without owning, boarding facilities in San Dimas keep the option open at a fraction of the cost of building out a home corral. Sycamore Canyon Equestrian Center offers a round pen, hot walker, and wash rack with weekday access. True North Equine runs clinics and therapeutic riding in addition to standard boarding. Bonelli Equestrian Center, closer to the park itself, has advertised monthly board starting around $435, which is a useful anchor if you're weighing the ongoing cost of boarding against the upfront cost of buying land that already carries the P-H designation.
Before you write the offer
If keeping a horse at home is part of why you're looking at San Dimas, a few checks belong in your due diligence before the property even makes it to inspection:
- Ask the listing agent or the city's planning department to confirm the P-H suffix on the specific parcel, not just the neighborhood
- Verify the lot size against the 11,000-square-foot minimum and the scaling thresholds if you want more than two horses
- Walk the setback distances against existing structures, since an 80-foot buffer from a neighbor's house can rule out corral placement even on a technically qualifying lot
- Get the confirmation in writing rather than relying on a listing description, since "horse property" is marketing language and the overlay designation is a legal one
FAQ
If a lot is large enough, does that automatically mean I can keep a horse there? No. Size alone doesn't confer the right. The parcel needs the P-H overlay designation on the zoning map, and the 11,000-square-foot threshold is a minimum within that designation, not a standalone rule that applies citywide.
Can I add the overlay to a property that doesn't have it? That would require a rezoning or variance process through the city, which is a separate undertaking from a standard purchase and not something to assume will happen on a timeline that suits your move-in date. If horse-keeping matters to your decision, it's worth treating current zoning as fixed rather than pending.
San Dimas earns its Western-town reputation honestly, but that reputation and the zoning map are two different documents. If you're comparing lots specifically for their horse potential, or you want help reading a P-H designation before you write an offer, Shannon Brady Realty can walk the parcel-specific details with you before you're standing in escrow finding out the hard way.
