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Abilene, TX Right to Farm: Agricultural Zoning Protection (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Minimum lot size
217,800 sq ft (5 acres)
Max lot coverage
15% of lot area
Dwellings per lot
One, plus an accessory dwelling unit
Rear/side setbacks
40 ft rear, 25 ft side yard
Zoning violation fine
Up to $2,000 per day, Sec. 1-9(a)
Enforcing agency
Planning and Development Services Dept.

Summary

Abilene's Agricultural Open Space (AO) District, Land Development Code Sec. 2.3.2.1, preserves vacant and working farmland inside city limits by capping density at one dwelling per lot, requiring five-acre (217,800-square-foot) minimum lots and holding lot coverage to just 15 percent. The City also uses AO as a temporary holding zone for annexed land.

(a)Purpose. The Agricultural Open Space (AO) District is composed mainly of unsubdivided lands within the corporate limits of the City that are vacant or in agricultural use, with some dwellings and some accessory uses (structures). The applicable regulations are designed to preserve valuable agricultural lands and to preserve, in a more permanent manner, open space located within the corporate limits of the City. This district is also used as a "holding zone" for land annexed to the City of Abilene, until a request for a more intensive category of land use is approved. ...(d)Number of Dwelling Units per Lot. There shall be a maximum of one (1) dwelling unit per lot, with the exception of accessory dwelling units which may otherwise be permitted by this LDC.

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 14).

Full Breakdown

The AO District sits in Land Development Code Chapter 2, Article 3, Division 2, alongside Abilene's other residential categories, but it is built around agriculture rather than housing. Under Sec. ' The section also spells out a second job for the zone: newly annexed land is dropped into AO as a 'holding zone' until an owner applies for a more intensive category. Table 2-2 sets the numbers that make AO function as farmland rather than a subdivision. Minimum lot size is 217,800 square feet, five acres, with a 200-foot minimum width and 500-foot depth.

Street setbacks run 25 feet from a subcollector or minor street up to 40 feet from a freeway without a frontage road, the rear yard must be 40 feet, and each side yard 25 feet. Lot coverage is capped at 15 percent, the lowest of any residential category in the table, matched only by the RR-5 rural district. Height has no flat ceiling: buildings over 45 feet must add one foot of setback for every foot of height above that mark. 1(d) limits development to one dwelling unit per lot, though an accessory dwelling unit is allowed on top of that.

Barns and other farm and ranch structures on parcels of ten acres or more are exempt from the usual side/rear-yard-only placement rule for accessory buildings under Sec. 1(a)(1)b.

Violations & Fines

Developing outside these limits, exceeding 15 percent lot coverage, building closer than the required setbacks, or adding a second principal dwelling without a variance is a zoning-code offense. Code of Ordinances Sec. 1-9(a) sets the general penalty for city ordinance violations at up to $500 per offense, but doubles the ceiling for zoning: an offense arising under a zoning ordinance is punishable by a fine of up to $2,000, with each day of a continuing violation counted as a separate offense. The Planning Director enforces the Land Development Code, and property owners seeking relief apply to the Board of Adjustment for a variance.

Frequently Asked Questions

Can I build a barn or farm structure on my Abilene AO-zoned land?
Yes. Barns and other structures necessary for farming and ranching are exempt from the standard side- and rear-yard-only placement rule for accessory buildings, as long as the parcel is at least ten acres, under Sec. 2.4.4.1(a)(1)b of the Land Development Code. Smaller AO parcels still must place accessory buildings and dwellings in side or rear yards only.
How big does my lot need to be in Abilene's AO district?
Table 2-2 sets a 217,800-square-foot minimum, five acres, with at least 200 feet of width and 500 feet of depth. That is the largest minimum lot size in the Land Development Code's residential table, reflecting the district's purpose of preserving farmland and open space rather than subdividing it.
Is there a height limit for buildings in the AO district?
Not a flat one. Table 2-2 allows unlimited height as long as the building adds one foot of setback for every foot it rises above 45 feet, so a taller barn, silo or home simply has to sit further back from the property line.
What happens if I put a second house on my AO lot?
Section 2.3.2.1(d) limits AO lots to one dwelling unit, with an accessory dwelling unit permitted on top of that. Adding an unauthorized second principal dwelling is a zoning violation punishable under Sec. 1-9(a) by a fine of up to $2,000 per day until it is corrected or approved through the Board of Adjustment.

Sources & Official References

Other rules in Abilene

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All Abilene rules

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