Rodent Removal in Houston Heights

A Houston Heights house is open at the bottom and open at the top, and that is the whole rodent problem in one sentence. The Heights was platted in 1891 as one of the first planned communities in Texas, and the City of Houston's historic district guidelines describe the typical house as pier-and-beam with the first floor four or five steps above grade, the piers clad in brick, and the foundation skirted with wood lattice or lap siding. Lattice keeps out dogs. It does nothing against a Norway rat, which lives at ground level and treats a Heights crawl space as a dry burrow with a wood ceiling.

Above the porch, the same house has wood soffits, gable ends and roof returns that were framed a century ago and have been re-sided, re-roofed and re-wired several times since. Each round of work leaves a transition that was never fully closed. The roof rat, the attic species across Houston, reaches those transitions from the canopy. The Heights is known for its tree-lined esplanades, and the live oaks on the boulevards and in the yards put limbs within a few feet of rooflines on most blocks. Anyone who has lain awake at 2 a.m. listening to something run the length of a ceiling joist knows the house stops feeling like theirs. The fix is the same both times: find the openings, seal them with metal, and trap what is already inside.

The Heights sits inside the 610 Loop, inside the City of Houston and inside Harris County, so the contractor we route works under the Texas Department of Agriculture license that covers rat and mouse control in the city.

The entry points on a Heights bungalow split cleanly into a low list and a high list, and a proper inspection walks both. Everything on either list gets measured against the UF/IFAS figure: a rat passes through a half-inch opening, a mouse through a quarter inch, and a quarter inch is the standard the sealing is built to.

Below the floor

The crawl space is the Norway rat's route, and the skirting is where it fails. Lattice panels, rotted lap siding at grade, the gap where a porch skirt meets the main skirt, and the openings cut for plumbing and gas lines all admit a rat. Once under the house, the animal follows the piers to a plumbing chase or a floor register and comes up into the wall cavities. Sealing here means quarter-inch galvanized hardware cloth fastened behind the lattice along the full perimeter, metal collars at pipe penetrations, and a screened, latched access door in place of a loose panel.

At the roofline

Roof rats arrive along oak limbs and the power drop, then test the roofline for the weakest point. On the older composition-shingle roofs common in the Heights that means cracked rubber pipe boots, which Houston sun degrades within a few years, gable vent screens that have rusted through, the open end of a roof return where two roof planes meet, and the fascia gap behind a gutter. Hardware cloth over the vents, sheet metal at the returns and fascia, and new boots at the plumbing stacks close them. Pruning limbs back off the roof removes the highway. The rodent exclusion page covers the crawl-space and roofline methods in detail.

White Oak Bayou forms the western edge of the Greater Heights and gives the neighborhood a permanent rodent supply line. The bayou corridors across Houston work as travel lanes for rats, and a bayou-side block on the west side of the Heights sits closer to that traffic than a block near Heights Boulevard. Norway rats burrow along the banks and along the drainage that feeds them.

Flooding moves that population. During Hurricane Harvey in 2017 White Oak Bayou crested at a record 45.6 feet and homes near the bayou in the Woodland Heights and Timbergrove areas took water. In July 2024 Hurricane Beryl pushed the bayou past 39 feet at I-10 and Heights Boulevard, with paths feet under water. The Heights proper was founded on ground about 23 feet higher than downtown, so most streets stay dry, and a dry attic on high ground is exactly where a displaced rat goes. The CDC ties increases in leptospirosis to hurricanes and floods, lists rodents among the animals that carry it, and recommends rodent control as part of post-flood prevention. A post-storm rodent inspection after any bayou rise is the sensible follow-up on a Heights block.

Storm or no storm, the calls from the Heights climb in October through December, when the first cool nights send rats from the yard into the attic to nest. Houston rodents breed all twelve months with no winter die-off, so a family that moves into a Heights attic in November is producing litters by February. A roof rat is sexually mature at three to four months, carries a litter for around three weeks, and can raise four or five litters a year of five to eight pups, per UF/IFAS. The math argues for calling on the first night of scratching instead of the tenth.

A Heights job runs in a fixed order: inspect both levels, seal with metal, trap inside, verify, and then deal with any contaminated insulation. The free inspection takes in the crawl space with a flashlight and the attic with a headlamp, and the quote that follows separates each piece so it can be compared with another bid.

1. Inspection of the skirting perimeter, pipe penetrations, roofline, vents and attic, with droppings identified by species. Roof rat droppings run a quarter to half an inch with pointed ends, per UF/IFAS.
2. Sealing from the ground up with hardware cloth, sheet metal and metal collars. Foam is a backing behind metal at most.
3. Snap traps set on the runs the same day and left for at least a week, since roof rats avoid anything new. Trapping keeps a poisoned animal from dying inside a wall of a house with no easy wall access.
4. A return visit to confirm no fresh sign, then attic cleanup if the insulation is fouled.

The rat removal page lays out the trapping side, and the attic cleanup page covers what happens when a century-old attic has held rats for a season. Older Heights attics often carry cellulose, which soaks up Gulf humidity and rodent urine together and usually has to come out. Ask the contractor for the TPCL number and confirm it with the Texas Department of Agriculture before signing, which is the advice TDA's own rodent flyer gives homeowners. Questions before booking go through the contact page.