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San Antonio, TX Building Setbacks & Zoning: Lot Coverage Limits (2026)

Some Restrictions

Verified 1 month ago|Source: UDC Art. V Div. 4 Lot Layout, Height, and Density/Intensity Standards (§ 35-515 Lot Layout) →

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Key Facts

Code Section: UDC § 35-515 through § 35-517
Accessory Max: 50% of side/rear yard area
Accessory Floor Area: 2,500 sq ft max in residential districts
Open Space: Min 500 sq ft contiguous in rear yard
Aquifer Zone: 15% max impervious cover for residential

Summary

San Antonio regulates lot coverage through the UDC. Accessory structures may cover a maximum of 50% of the total side and rear yard area, with total accessory floor area not exceeding 2,500 square feet in residential districts. Each lot must maintain at least 500 contiguous square feet of open space in the rear yard. Impervious cover is further restricted over the Edwards Aquifer Recharge Zone to 15% for residential development.

Full Breakdown

San Antonio zoning code limits maximum lot coverage, defined as the percentage of a lot covered by buildings, driveways, patios, and other impervious surfaces. Typical residential limits are 40 to 60% depending on zoning district and lot size. Lot coverage calculations include primary structures, accessory buildings, paved areas, and covered patios. Permeable pavers may receive partial credit in some jurisdictions. Exceeding lot coverage requires a variance. Stormwater management requirements may apply to highly impervious lots.

Violations & Fines

Exceeding lot coverage: correction required. May need to remove impervious surface. Fines $200 to $1,000.

Frequently Asked Questions

How much of my lot can I build on in San Antonio?

Accessory structures can cover up to 50% of the combined side and rear yard area, with a total floor area cap of 2,500 square feet. Every lot must maintain at least 500 contiguous square feet of open space in the rear yard.

Are there extra coverage limits over the Edwards Aquifer?

Yes. Residential development over the Edwards Aquifer Recharge Zone is limited to 15% gross impervious cover under the Aquifer Protection Ordinance, which is more restrictive than standard UDC lot coverage limits.

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Lot Coverage Limits in Nearby Cities

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San Antonio, TX Building Setbacks & Zoning: Lot Coverage Limits (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

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