Do you need a permit for a backyard concrete patio in Harris County?

Sometimes, and it depends on which side of a city line your backyard sits. A patio is paving on your own lot, and the three jurisdictions most people around here deal with (Houston, Humble, and unincorporated Harris County) each treat it a little differently. We’ll be straight with you: in two of the three, the official pages leave room for doubt. Where they do, we say so.

Inside the City of Houston

Houston’s building code amendments have a section for paving on private property. It names driveways, sidewalks, patios, and other paving that isn’t in the public right-of-way, and it says that paving has to meet the code’s minimum slab provisions. The city also issues a Paving Permit for private property.

Houston paving permit, private property

• Plan review and inspections required
• Posted processing time: 10 days
• Valid for 180 days
• Fee from $94 for the first 1,000 square feet, plus an administrative fee

Here’s the murky part. Houston’s residential code amendments list work that’s exempt from a permit, and one entry reads: “Sidewalks and driveways not covered under the provisions of the Infrastructure Design Manual; i.e. interior flatwork not exceeding 65% of the total impervious area.” The same amendments define interior flatwork to include patios. Read literally, a modest patio on a lot that isn’t mostly paved could be exempt. But the sentence doesn’t make clear what the 65% is measured against, and we’d rather not guess on your behalf. Call the Houston Permitting Center at 832-394-9000 with your lot size and the patio dimensions before you plan around an exemption.

An exemption only covers the permit. The same section says it doesn’t authorize work that violates any other code or ordinance.

In unincorporated Harris County

This covers most of Atascocita and a good share of Spring. There’s no city desk here, and the county’s permit FAQ starts broad: “A permit is needed for all development within Harris County.” Its definition of development includes grading, filling, and paving.

That FAQ even has the exact question, “Do I need a permit to add a patio or carport to my house?” The answer printed under it, when we checked in September 2026, is a list of steps for revising an approved plan set. It doesn’t say yes or no. So the county’s own page doesn’t settle a plain backyard patio, and we won’t pretend it does.

What the county does make clear is the floodplain. Grading, filling, or paving inside a mapped floodplain needs a floodplain development permit, and no fill is allowed in a floodway. If the county’s map puts your lot in the 500-year floodplain, a development permit application needs an elevation certificate and an accurate site plan. The county’s permits line, 713-274-3900, will give you an unofficial floodplain answer by phone.

Inside Humble, and your HOA everywhere

Humble is the clearest of the three. The city lists concrete among the work that needs a plan submission, and its residential packet lumps pads, driveways, and slabs together: two sets of plans with the rebar size and spacing shown. A patio is a slab on the ground, so plan on it. Our Humble permit guide walks through the rest of the packet.

Whatever the city or county says, a deed-restricted neighborhood gets a vote of its own. Master-planned communities usually want to see exterior concrete before it goes in, and that approval is separate from any permit. Our HOA guide covers what committees look for and what Texas law says if yours says no.

Where we come in

On a patio, the floodplain map is the first thing we pull up for your lot, because it decides more here than the patio’s size does. The drainage gets drawn before anything is formed, the way our patio method lays out. We don’t pull permits ourselves; if yours needs one, you’ll know who pulls it before we bid.

Permit rules change, and your city or the county engineer’s office has the final word for your address. We last checked the pages and code sections above in September 2026. This is general information, not legal advice.