If you're shopping for an equestrian property in Castle Rock, Colorado, the first numbers to know come from Section 24 of the Douglas County Zoning Resolution, and they depend on the zone district and the lot size. On Estate Residential (ER) lots and Rural Residential (RR) lots, the cap is one animal unit per half acre; on Large Rural Residential (LRR) and Agricultural One (A-1) lots of 9 acres or more, the number of horses you own isn't limited, and the rules shift to how many other people's horses you can board. Young animals under 6 months of age don't count toward the limit (Douglas County Zoning Resolution, Section 24, Animals). How many horses you can keep, whether you can board, and whether you can teach lessons all come down to your zone district, your acreage, and your HOA covenants.
Before you fall in love with a barn and a view, here's the short checklist I run through with every horse buyer:
- Confirm the zone district (ER, RR, LRR, or A-1) and the parcel's exact acreage.
- Do the animal-unit math if the lot is ER or RR: one animal unit per half acre.
- Decide if you'll board horses (the by-right number runs from one on ER lots to four on A-1 lots of 35 acres or more; more needs administrative review or a Special Use Review).
- Ask whether you'll teach lessons (up to 14 lessons per week for non-owned horses or unrelated riders is allowed by right in RR, LRR and A-1).
- Check whether you're crossing into commercial use (that triggers a Special Use Review).
- Read the HOA covenants, which can prohibit horses even where the county allows them.
- Verify water, since a horse boarding or training facility under Special Use Review must show 20 gallons per horse per day.
How many horses can you keep on Castle Rock acreage?
It depends on which acreage band you're in. Section 24 counts hoofed animals in animal units: one horse, mule, cow or llama is one unit, and four miniature horses, swine, sheep, goats or alpacas make one unit. Young animals under 6 months don't count (DCZR Section 2405). So if you've got a couple of goats out there, they count too.
| Zone district and lot size | Owned horses | Boarded horses by right | Boarded horses by administrative review | Code section |
|---|---|---|---|---|
| ER, and nonconforming RR/LRR/A-1 lots of 2.3 to 4.49 acres | 1 animal unit per 1/2 acre | 1 (counts toward the animal units) | Not listed | DCZR 2406 |
| RR, and nonconforming A-1/LRR lots of 4.5 to 8.9 acres | 1 animal unit per 1/2 acre | 2 (count toward the animal units) | Not listed | DCZR 2407 |
| LRR, and nonconforming A-1 lots of 9 to 34.99 acres | Not limited | 2 | 3 to 8 | DCZR 2408 |
| A-1, 35 acres or more | Not limited | 4 | 4 to 12 | DCZR 2409 |
| A-1, 80 acres or more (with 200-foot setbacks) | Not limited | 12 | 13 to 18 | DCZR 2409 |
On the larger bands, "not limited" is the code talking, not the land. Colorado's semi-arid climate is hard on pasture, and an overstocked parcel ends up on hauled-in hay year-round. Run the math on the acreage, not the dream.
Which zone district is the property in?
This is the question I wish more buyers asked before writing an offer. A listing that says "horse property" tells you nothing until you know the district and the exact lot size. The bands in the table above come straight from Section 24, which is why I always pull the zoning before we tour, so we're not standing in a barn doing guesswork. Douglas County's planning staff say the same thing: review Section 24 and any Planned Development (PD) that applies to the parcel (Douglas County Planning, Animals).
A few lot-size numbers get mixed up, so here's where each one comes from:
- 2.3 acres is where Section 24's horse and hoofed-livestock bands start (DCZR Section 24). Smaller lots are governed by their zone district or PD, so check before assuming.
- 2 acres is the minimum lot area for a lot served by its own well and septic in the RR and LRR districts (1 acre on central water) (DCZR Section 506, RR; DCZR Section 406, LRR). It's a lot-creation rule, not a horse rule.
- 1 acre is the minimum lot size for hoofed animals in one specific district, the Sedalia Mixed Industrial (MI) district (DCZR Section 1402D.04). It isn't a countywide rule.
Can you board other people's horses?
Boarding is where a lot of folks trip up, because keeping your own horses and boarding someone else's are treated very differently. The code counts a non-owned horse kept on the land for training or breeding as a boarded horse (DCZR 2404.02). On an LRR lot, for example, two boarded horses are allowed by right and three to eight may be permitted through administrative review; on an A-1 lot of 35 acres or more, it's four by right and up to 12 through administrative review (DCZR 2408 and 2409).
So if your plan is to bring in a few boarders to help cover the cost of the property (I hear this one a lot), understand that the county wants a say once you pass the by-right number. It's not a dealbreaker, it's a process. Just budget the time for it.
When does horse keeping become a commercial use?
Once you cross from hobby into business, the rules change again. A horse boarding or training facility needs a Use by Special Review in the A-1, LRR, RR and ER zones when the number of boarded horses exceeds what's allowed by right or by administrative review, or when lessons for non-owned horses, or riders not related to the landowner or lessee, exceed 14 per week (DCZR Section 2107.23).
What the county wants to see
A Special Use Review isn't just paperwork. The applicant has to demonstrate a minimum water supply of 20 gallons per horse per day, get the necessary well permits from the state Division of Water Resources, and show allowable devegetation, grazing pastures, the grazing schedule, manure storage and manure disposal on a plan exhibit (DCZR Section 2107.23). If you're eyeing a working boarding or training operation, water is the piece that quietly makes or breaks the plan out here.
Can you teach riding lessons on the property?
Yes, within limits. The RR district expressly permits "Training of nonowned horses, or riders not related to the landowner or lessee, limited to 14 lessons per week" as a by-right accessory use (DCZR Section 503.09, RR), and the LRR and A-1 districts list the same 14-lesson limit as a by-right use (DCZR Section 402.09, LRR; DCZR Section 302.11, A-1).
That 14-lesson ceiling is the same number that shows up in the commercial trigger. Stay at or under it and you're operating by right. Go over it, and you're in Special Use Review territory. If a modest lesson program is part of your income plan, know exactly where that line sits.
What does A-1 Agricultural zoning actually mean?
A-1 is the big-acreage standard, described in the code as land "characterized by large-acreage farms, ranches, open areas, farm houses, units for agricultural workers and their families" (DCZR Section 3, A-1 Agricultural District).
Here's the catch buyers miss: the A-1 minimum lot area is 35 acres, and an A-1 parcel smaller than that is limited to the uses allowed in the zone district it conforms to in size (DCZR Sections 302 and 306). That's why a 20-acre A-1 parcel follows the LRR band in Section 24. Read the acreage, not just the zoning label.
What about manure, setbacks, and the land itself?
The county cares about what your horses leave behind. Manure has to be removed, composted or spread regularly and can't be buried; in the agricultural districts manure piles must sit at least 100 feet from any lot line, well, stream or waterbody, and in residential districts they follow the zone's accessory-use setback (DCZR Section 2413).
Barns, corrals, arenas, paddocks and round pens have their own setbacks, which grow with lot size: 25 feet from every line on a 2.3 to 4.49-acre lot, up to 100 feet from the street and 50 feet from side and rear lines at 35 acres or more (DCZR Section 2411). Section 24 also caps how much of the lot can be devegetated, from 25% of the site on the smallest band to 5.2 acres or 10% (maximum 10 acres) at 35 acres or more, and the rest has to stay in grass (DCZR Section 2412). Overgrazed parcels can turn to bare dirt in a couple of seasons. Rotate your pasture and you protect both your land and your resale value.
Which equestrian features actually add value?
The features that reliably carry weight with appraisers and serious buyers are functional and permanent: usable acreage that fits the zoning, a barn with stalls, water and power, an arena with real drainage and all-weather footing, cross-fenced pasture you can rotate, and dependable water for both the house and the horses.
A few honest observations from walking a lot of these properties:
- Portable panels, temporary shelters and anything on wheels usually read as personal property, not real estate, so they rarely add appraised value even though buyers like them.
- A specialized, expensive facility doesn't always return dollar for dollar. A covered arena is wonderful to use, but you may not recoup its full cost at sale. Around Castle Rock, Franktown and Larkspur, most buyers want practical, working setups.
- Legal capacity is part of value. If a buyer wants six horses and the zoning can't support them, the property is worth less to that buyer. Know your zone and your legal capacity cold before you list.
Does keeping horses lower your property taxes?
Not automatically. The Colorado Division of Property Taxation ties agricultural classification to land used the previous two years, and presently used, as a farm or ranch for profit, and it defines livestock as domestic animals used for food, breeding, draft or profit (Colorado Division of Property Taxation, Agricultural Property). Pleasure horses alone don't fit that definition, so don't budget for "ag" taxes you may not get. If you think the land qualifies through a genuine agricultural use, ask the Douglas County Assessor.
Getting a horse property ready to sell
Start with function and safety: repair fencing, make sure water works in cold weather, clean up the barn, and fix rutted or poorly draining arena footing. Then gather your well permit, any water rights documents, your zoning confirmation, and records for the barn and arena. A tidy, functional setup with the papers in order shows better and appraises more cleanly than mystery improvements with no records.
Don't forget the HOA
Here's the one that surprises people most. County zoning can allow horses, and your covenants can still say no. Recorded covenants can be stricter than county zoning, up to banning livestock outright, and a county permit doesn't override them.
So read the covenants before you get attached. If keeping horses is the whole point of the move, the HOA documents matter as much as the zoning map.
A grounded next step
I've lived in Elbert County for 22 years and spent a long time helping people sort out barns, pasture, water, and zoning across Douglas, El Paso, and Elbert County. The horse-property market out here rewards buyers who do the homework up front. If you're thinking about buying or selling an equestrian property near Castle Rock, Franktown or Sedalia, call The Seville Team and I'll pull the zone district and the Section 24 numbers for the parcel before you commit.