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San Marcos, TX Accessory Structures: Shed & Carport Rules (2026)

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

Shed permit rules in San Marcos, TX, also referred to as storage shed, backyard shed, or accessory building regulations, set size limits, setbacks, and when a building permit is required.

Key Facts

Small-shed permit exemption
Removed locally
Governing rule
Sec. 14.041 amendments to R105.2
Permit requirement
Sec. 14.451(a)
Max fine per violation
$500 (Sec. 1.015(b))

Summary

San Marcos deleted the standard small-shed exemption from its Residential Code, so a detached accessory structure like a shed needs a building permit no matter how small it is.

Section R105.2 Building Exemption #2 is removed. ... It is unlawful for a person to perform any work requiring a building permit under the terms of this chapter without first applying for and obtaining a building permit for the work.

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 41).

Full Breakdown

Most IRC jurisdictions exempt one-story detached accessory structures such as tool sheds and playhouses under a set square footage from needing a building permit. San Marcos struck that exemption when adopting the Residential Code: "Section R105.2 Building Exemption #2 is removed." Under Sec. 14.451(a) it is unlawful to perform any permit-requiring work, including erecting a shed, without first obtaining a building permit from the building inspections office.

Violations & Fines

Building without a permit is unlawful under Sec. 14.451(a); the building official can order work stopped, and a conviction carries a fine up to $500 per violation under the Code's general penalty section, with each day a separate offense.

Frequently Asked Questions

Can I build a small backyard shed in San Marcos without a permit?
No. The city removed the standard exemption for small detached accessory structures, so a building permit is required regardless of the shed's size.
What happens if I build a shed without a permit?
It's unlawful under Sec. 14.451(a); the city can require you to stop work, and violations carry a fine up to $500 per day under Sec. 1.015(b).

Sources & Official References

Other rules in San Marcos

Noise Ordinances: Amplified Music & Outdoor SoundSome RestrictionsNoise Ordinances: Vehicle NoiseSome RestrictionsParking Rules: Commercial & Oversized VehiclesSome RestrictionsParking Rules: Driveway RulesSome RestrictionsParking Rules: Loading ZonesLight RestrictionsFence Regulations: Fence Permit RequirementsSignificant Restrictions

All San Marcos rules

How San Marcos compares: Shed Permit Requirements by City·Texas rules heatmap·Compare San Marcos to another location·View the Texas accessory structures overview

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