Before You Build in Katy, TX: Permit & Rule Checklist (2026)
Everything you need to know before starting a home improvement project
Building a fence, installing a pool, or adding a shed? Each project has its own set of local permits and rules in Katy. This guide consolidates fence, pool, ADU, shed, fire pit, and landscaping regulations into one checklist so you know what to expect before you start.
Quick Permit Checklist
At-a-glance overview of permit categories in Katy. Click any card for details.
Fences & Walls
1 rule on file
Swimming Pools
4 rules on file
ADUs & Granny Flats
2 rules on file
Sheds & Outbuildings
2 rules on file
Fire Pits & Outdoor Structures
1 rule on file
Landscaping & Tree Removal
3 rules on file
Fences & Walls
Few RestrictionsHeight limits, materials, permits, and shared fence rules.
Height Limits
Few RestrictionsKaty's Code of Ordinances and Zoning Ordinance (Exhibit 14A) do not set a numeric maximum fence height for residential lots and require no building permit for fence construction. Corner lots must preserve sightlines at intersections, and almost every Katy subdivision is governed by HOA deed restrictions that typically cap fences at 6 to 8 feet. Texas Local Government Code Chapter 211 authorizes Katy's zoning controls.
Swimming Pools
Heavy RestrictionsPool permits, safety fencing, and drainage requirements.
Pool Permits
Some RestrictionsKaty requires a building permit before construction or installation of any in-ground or above-ground residential swimming pool within city limits.
Above-Ground Pools
Some RestrictionsAbove-ground pools in Katy must obtain the same building permit and meet the same 2021 ISPSC standards as in-ground residential pools.
Hot Tub Rules
Some RestrictionsHot tubs and spas in Katy fall under the same adopted International Swimming Pool and Spa Code, with permit and safety cover or barrier requirements.
Fencing Requirements
Heavy RestrictionsKaty adopted the 2021 International Swimming Pool and Spa Code and 2021 IRC (effective Jan 1, 2024), which require a 48-inch barrier with self-closing/self-latching gates around residential pools; a permit is required for all in-ground and above-ground pools.
ADUs & Granny Flats
Some RestrictionsAccessory dwelling unit rules and garage conversion permits.
Garage Conversions
Some RestrictionsKaty requires a building permit for converting a garage to living space under the 2021 IRC and 2023 NEC adopted Jan 1, 2024. Conversions cannot create an unrelated rental unit, and HOA deed restrictions in master-planned subdivisions often prohibit the change.
ADU Rules
Some RestrictionsKaty's Zoning Ordinance defines an Accessory Dwelling Unit as a unit accessory to a principal single-family residence, used only by family members, guests, or employees working within the residence; commercial use is prohibited.
Sheds & Outbuildings
Some RestrictionsShed permits, setback limits, and outbuilding size rules.
Carport Rules
Some RestrictionsKaty treats carports as accessory structures requiring a building permit, with placement governed by the same setback and height rules as other detached accessory buildings.
Shed Rules
Some RestrictionsKaty requires a permit for storage sheds and other detached accessory buildings, with setback and height limits set by the city zoning ordinance and building code.
Fire Pits & Outdoor Structures
Heavy RestrictionsFire pit placement, outdoor burning restrictions, and permits.
Fire Pit Rules
Heavy RestrictionsKaty bans construction or use of any barbecue pit or open flame within 10 feet of a multifamily building wall, or beneath a balcony, porch, roof overhang, or veranda. The rule was adopted under Ordinance 3123 amending the 2021 International Fire Code.
Landscaping & Tree Removal
Heavy RestrictionsTree removal permits, heritage tree protections, and water rules.
Tree Removal & Heritage Trees
Heavy RestrictionsRemoving or destroying a tree on Katy public property without the public works director's permission is a misdemeanor with fines up to $200 per tree.
Water Restrictions
Heavy RestrictionsKaty enforces a multi-stage drought plan with mandatory twice-weekly outdoor watering windows tied to address numbers and land use.
Tree Trimming
Heavy RestrictionsKaty requires the public works director's approval before trimming, pruning, or otherwise altering any tree on city property, easements, or rights-of-way.
General Permit Tips
When do you typically need a permit?
Most cities require permits for structural work, including fences over a certain height, pools, ADUs, and sheds above a size threshold. Even projects that seem minor can trigger permit requirements, so it is always best to check first.
How to apply for a building permit
Visit your local building department or their website. Most jurisdictions accept online applications. You will typically need a site plan, project description, and may need contractor information. Processing times vary from same-day for simple projects to several weeks for larger builds.
Common permit violations to avoid
Building without a permit, exceeding approved dimensions, and ignoring setback requirements are the most common violations. Penalties can include fines, required removal of the structure, and complications when selling your home.
Permit Guides for Nearby Cities
Looking for rules beyond permits? View all ordinances we track for Katy.