Poison-Free Rodent Control in San Diego, CA
California law has removed the strongest rat poisons from residential use, and the program that replaces them is snap traps, sealed entry points and monitoring. This page explains the law and what it means at a San Diego house.
- No anticoagulant bait at homes
- Snap traps, sealing, monitoring
- Free inspection first
What poison-free rodent control in San Diego includes
Poison-free rodent control is an inspection, the sealing of every entry point with metal, snap trapping on the runs inside, removal of what the traps take, and a monitoring period that confirms the house has gone quiet, with no rodenticide placed anywhere on the property. In San Diego that is also what the law leaves for a residential job, so the contractors we route run it on every house.
The method is older than the law. Snap traps and steel mesh were the standard before anticoagulant baits existed, and the reason they came back is that they solve the two problems bait creates: the dead animal inside the wall and the poisoned animal outside it. The roof rat removal page covers the trapping; the rodent exclusion page covers the sealing. This page covers why the two together are the whole program here.
- A free inspection of the roofline, attic, crawl space where there is one, garage and yard
- Sealing of every opening a quarter inch or larger with hardware cloth, sheet metal and metal bird stops at tile eaves
- Snap traps set on the dropping runs in the attic and along the sill line, in enclosed stations where pets or children could reach them
- Trap checks and removal of the animals caught
- Removal of any bait blocks or stations left by a previous job
- A monitoring visit to confirm no fresh sign, and a written record of what was sealed
- Pruning and yard recommendations that cut the supply from palms, ivy and fruit trees
People who call about poison have often already tried it. The block in the attic is gone, the noise came back, and something in a wall smells. That sequence is the reason this page exists.
What AB 1788 and AB 1322 changed for a San Diego house
Two California laws have removed the second-generation anticoagulants and diphacinone from use at homes, so a pest company working at a San Diego house cannot lawfully place the baits that were standard a decade ago. The California Department of Pesticide Regulation explains both laws on its question-and-answer pages, and the bill texts are published by the state legislature.
AB 1788, effective January 1, 2021
The California Ecosystems Protection Act prohibits the four second-generation anticoagulants, brodifacoum, bromadiolone, difenacoum and difethialone, everywhere in the state except at a short list of sites: medical waste generators, food and drug manufacturing, slaughterhouses, breweries and wineries, food warehouses, agricultural sites and locations under a declared public health emergency. A house is on no part of that list, and residential use by pest companies ended with the law.
AB 1322, effective January 1, 2024
The second law adds diphacinone, a first-generation anticoagulant that had become the common substitute after 2021, to the same moratorium with the same exemptions, and restricts the sale of diphacinone products to licensed dealers. The DPR page on diphacinone sets out what that means for applicators.
What a licensed applicator may still use at a home
The remaining legal list is narrow: the non-anticoagulant baits bromethalin and cholecalciferol, and the first-generation anticoagulants warfarin and chlorophacinone. Each is a registered pesticide with a label, and each can still leave a dead animal inside a structure and a poisoned carcass outside it, which is why the program below does without them.
| Product | Type | Status at a San Diego home |
|---|---|---|
| Brodifacoum, bromadiolone, difenacoum, difethialone | Second-generation anticoagulants | Prohibited since January 1, 2021 (AB 1788) |
| Diphacinone | First-generation anticoagulant | Prohibited since January 1, 2024 (AB 1322) |
| Warfarin, chlorophacinone | First-generation anticoagulants | Legal for licensed use; left out of the program |
| Bromethalin, cholecalciferol | Non-anticoagulants | Legal for licensed use; left out of the program |
| Snap traps, hardware cloth, sheet metal, bird stops | Mechanical | No restriction; the program |
What the Department of Fish and Wildlife adds
The California Department of Fish and Wildlife urges exclusion and trapping over rodenticides, and it prohibits trapping wildlife and releasing it somewhere else. Roof rats and house mice are non-native species with no protected status, so no permit is needed to trap them and no relocation question arises; they are dispatched, and the sealing keeps the next ones out.
Signs that a previous poison job is still in the house
The signs of a bait program that did not finish the job are a smell in a wall or ceiling, green or blue bait fragments in the attic or the garage, a return of night noise a few weeks after it stopped, and, on the worst calls, a sick pet. Each one points to the two failures bait cannot avoid: nothing was sealed, and the animals died where they chose.
| Sign | What it usually means | What is done about it |
|---|---|---|
| A sweet, heavy odor from a wall, ceiling or under a floor | A poisoned rat died inside the structure | The carcass is located and removed; see dead rodent removal |
| Bait blocks, loose pellets or open stations in the attic or crawl space | An older job, possibly with products now prohibited | Removed and disposed of before trapping starts |
| Noise stopped, then returned within weeks | The openings were never closed and the canyon or the palm resupplied the attic | Sealing, then traps |
| Blowflies at a window in a closed room | A carcass in the wall behind it | Location and removal |
| A dog or cat that ate a rat and became lethargic or bled | Secondary poisoning | A veterinarian at once; the pest program is changed |
| Fresh droppings, a quarter to half an inch with pointed ends | Roof rats are still active | The trapping program |
The dropping description is from UF/IFAS and identifies the county's common rat. Fresh droppings after a bait job are the plainest evidence that bait was placed and the roof was left open.
The dead-in-the-wall problem and the poisoned-animal problem
Poison fails inside a house because the animal decides where it dies, and it fails outside a house because the animal is still food after it dies. Both problems follow from how anticoagulants work, and neither one is solved by a stronger bait.
Inside: the carcass you cannot reach
Anticoagulant baits kill slowly. The EPA describes death arriving anywhere from four days to two weeks after a rodent begins feeding, and a roof rat spends those days moving between the attic, the wall voids and the roofline as usual. When it weakens it retreats to the nest or the nearest dark void, which in a San Diego house is inside an exterior wall, above a bathroom ceiling or under a raised floor. The odor arrives a few days later and lasts for weeks. Opening drywall to find it is a separate job with its own line on the invoice. UF/IFAS notes the same thing from the other direction: a trapped rat is a rat that did not die somewhere inside the building.
Outside: pets, owls, hawks and the canyon
A poisoned rat that leaves the house is slow, disoriented and easy to catch, and whatever catches it takes in the bait. In San Diego that is the family dog, the neighbor's cat, and the owls, hawks, coyotes and bobcats that work the canyons a few yards from the back fence. Anticoagulants pass along the food chain intact, and the second-generation products were prohibited precisely because they persist in the animal that ate the rodent. The Department of Fish and Wildlife's guidance to use exclusion and trapping instead is the state's answer to that chain.
A house next to a canyon is the sharpest case. The canyon supplies the rats, the yard supplies the poisoned ones back to the canyon, and nothing in that loop closes the eave the rats came through.
Does poison make rats thirsty so they go outside to die?
No. The claim that poisoned rats become thirsty and leave the house to find water is a sales line with no basis in how anticoagulants act, and the pest forums treat anyone who says it as someone to stop dealing with. A rat dying of internal bleeding over a week or two goes where it feels safe, which is its nest, and a roof rat's nest in San Diego is in your attic insulation, a wall void or the crawl space.
The line persists because it answers the question a homeowner is about to ask, which is what happens to the body. The true answer is that nobody controls it. Some poisoned rats do die outside, where they become the poisoned-animal problem described above. Many die inside. The company that placed the bait has no way to say which, and a company that promises otherwise is promising something it cannot see.
The honest version of the same conversation is short: with snap traps the body is in the trap, and with sealing there are no more bodies to worry about.
Snap traps, sealing and monitoring compared with the bait options
The poison-free program is three things in a fixed order: seal the shell with metal, trap on the runs inside from the same day, and monitor until the house has been quiet through a full check cycle. Each part covers a weakness in the other two, and the table sets the whole against what bait offers.
| Method | What it does | What it cannot do |
|---|---|---|
| Sealing: quarter-inch hardware cloth, sheet metal, mortar, metal bird stop under the first tile course | Closes every opening a quarter inch or larger, the figure UF/IFAS sets as the rat-proofing standard, and keeps the next generation out | Remove what is already inside; traps do that |
| Snap traps on the runs, left in place at least a week | Kills quickly, leaves the body in the trap, gives a count | Stop new entries; sealing does that |
| Monitoring visit and written closure list | Confirms no fresh sign, catches a missed opening, records the work | Substitute for either of the above |
| Legal residential baits (bromethalin, cholecalciferol, warfarin, chlorophacinone) | Kills over days | Choose where the animal dies; keep the carcass out of the food chain; close a single hole |
| Second-generation anticoagulants and diphacinone | Prohibited at homes | Be lawfully placed at a San Diego house |
| Glue boards | Catch mice and young rats | Hold an adult roof rat reliably; checked daily or they become a welfare problem |
| Ultrasonic repellers, peppermint, mothballs | Nothing measurable | Anything |
The week-long trap placement matters with roof rats specifically. UF/IFAS notes their wariness toward anything new in their territory, so a trap pulled after two empty nights was never given a chance. A house that goes quiet inside days after sealing is the common result; HomeGuide's 2026 guide puts trapping a handful of animals at two or three days and only a severe, long-running infestation at a month or two.
What keeps rats away permanently?
A sealed building keeps rats out for as long as the closures hold, and in San Diego the closures hold longest on a house whose palms are skirted, whose ivy is off the walls and whose fruit is picked up, because those are the supply lines a roof rat travels to reach the roof. No bait, repellent or device does the same, and the county's year-round breeding season means a house that relies on killing rats is signing up to kill them forever.
Three habits extend the sealing. Keep branches, fronds and vines a few feet off the roofline, since the roof rat is arboreal and, per UF/IFAS, moves along limbs, wires and palm trunks and covers roughly a football field and a half from its den. Walk the eaves once a year and after the Santa Ana winds, because a lifted tile or a displaced bird stop is a new door. Replace the garage door sweep when daylight shows at the corners.
County Vector Control offers a free outdoor educational inspection and a Rat Control Starter Kit, reachable at (858) 694-2888, and its advice on yard conditions is sound. It does not trap, bait or seal; the contractors we route are the step after that advice.
What poison-free rodent control costs in San Diego
A poison-free job costs what its parts cost: the inspection, which is free, the sealing, the trapping and any removal or cleanup, each on its own line, and it removes the two lines a bait job tends to add later, the dead-animal search and the second visit when the noise returns. The figures below are national typical-job bands from HomeGuide's 2026 guide; there is no San Diego cost survey to cite, and the inspection produces the itemized number.
| Line item | National band (HomeGuide 2026) | Note |
|---|---|---|
| Inspection | $0 to $175 | Free through the contractors we route |
| Trapping and removal | $250 to $1,200 | Trap count, visits, attic and crawl-space access |
| Full-home exclusion sealing | $500 to $2,500 | Roofline length, tile eaves, foundation vents, penetrations |
| Dead rodent removal | $150 to $500 | The line a bait job adds; absent on a trapping job |
| Attic cleanup and decontamination | $600 to $2,500, severe toward $4,000 | Where droppings and urine have soaked insulation |
What moves a poison-free quote is the shell. A single-story stucco house in Rancho Penasquitos with concrete tile and one missing bird stop is at the low end of the sealing band; a two-story Craftsman in Mission Hills with open eaves, a crawl space and eight foundation vents is at the top. The national guides price crawl-space work, and a large share of older San Diego houses have one, so that line is real here in a way it is not on a Florida slab. Ask for the sealing and the trapping as separate figures, and ask whether any monitoring plan is bundled in.
Why poison-free fits a San Diego house in particular
San Diego is the case the state law was written for: a city cut by canyons full of the owls, hawks, coyotes and bobcats that eat rats, lined with the palms, ivy and citrus that feed and shelter roof rats, and built of houses whose eaves and crawl spaces are the way in. County Vector Control identifies the roof rat as the county's common rat and notes that it climbs, so the program starts at the roofline.
Canyon-rim houses
Kensington, Talmadge, Mission Hills, Clairemont and the ranch neighborhoods around Tecolote and San Clemente canyons back onto permanent rodent habitat. Bait at a canyon-rim house poisons the canyon's predators and does nothing to the supply. Sealing the house and trapping inside removes the house from the canyon's territory, which is the only outcome that lasts. The Kensington and Talmadge page covers that stock.
Tile roofs and open eaves
The gap under the first course of tile is closed by a bird stop, a named code-approved metal closure that the Department of Energy lists among its tile-roof measures, and a poison-free job on the 1970s to 1990s stucco stock in Tierrasanta, Mira Mesa or Scripps Ranch usually turns on fitting one. On the pre-war clay tile and open-eave houses in North Park and Mission Hills, the closures are hardware cloth at the eave and at every foundation vent, in the quarter-inch, 18 to 22 gauge grade County Vector Control recommends.
Pets and the mild climate
Dogs and cats in San Diego live outside year-round, and a poisoned rat in the yard in February is as likely as one in August. With no hard freeze and breeding all year, there is no season in which a bait program can be run and then stopped. Trapping and sealing end instead of pause.
Licensing
Trapping and sealing for hire at a home is Branch 2 work under the Structural Pest Control Board, and every company we route holds the Branch 2 registration the work requires. Ask for the PR number and confirm it at pestboard.ca.gov before the first visit. Where soaked insulation is replaced as a contracted repair, that is a Contractors State License Board job and is routed to a contractor with the CSLB license for it; see attic insulation replacement.
What to check on a poison-free quote
A poison-free quote should list the openings and materials, put trapping and sealing on separate lines, state the trap check schedule, name the PR number and answer the warranty question in writing, and the fastest way to test any quote is to ask which products, if any, it proposes to place. Bring the same list to every bidder.
- Does the proposal place any rodenticide, and if so, which product and where? A named second-generation anticoagulant or diphacinone product at a house is a proposal to break state law.
- What is the PR number, and does it match a registered company at pestboard.ca.gov?
- Is each opening the inspection found listed with its closure material, and is a metal bird stop named where the roof is tile?
- How long do the traps stay in place, and how many check visits are in the price?
- Are sealing and trapping separate figures, and is any monthly plan bundled in?
- What are the warranty terms on the sealing, and what happens if noise returns inside them?
- Will a previous job's bait blocks be removed and disposed of?
The first question settles most of the rest. A company that answers it with the thirsty-rat line has answered the others too. The about page explains what the routed contractors are expected to state in writing, and the contact page is where to describe the house and the noise.
Services that usually go with this one
A San Diego rodent job is a sequence, and these pages cover the steps on either side of this one.
- Roof Rat Removal: Trapping the climbing rat that accounts for nearly every San Diego attic call, sequenced with sealing.
- Rodent Exclusion: Closing tile eaves, open Craftsman rooflines, crawl-space vents and utility gaps to the quarter-inch standard.
- Dead Rodent Removal: Finding the carcass behind the smell, removing it, and closing the route it used.
How the steps fit together is set out on the about page, and the phone line answers the rest at any hour.
How a poison-free rodent job runs in San Diego
The shell is sealed first, the traps go in the same day, and the job ends with a quiet monitoring cycle and a written closure list.
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Free inspection and bait removal
Whoever attends walks the roofline, attic, crawl space and yard, lists every opening a quarter inch or larger, and removes any bait left by an earlier job before the program starts.
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Sealing with metal
Eaves, vents, penetrations and the garage seal are closed with hardware cloth, sheet metal, mortar and metal bird stops, measured against the quarter-inch standard.
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Snap traps on the runs
Traps go on the dropping runs inside as the shell closes and stay in place at least a week, in enclosed stations wherever a pet or child could reach.
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Checks and removal
Traps are checked and cleared, the animals removed, and the house is read for fresh sign; any missed opening is closed on the spot.
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Quiet cycle and closure list
A monitoring visit confirms nothing new, and you receive the list of every closure with its material, which is what a warranty attaches to.
Why San Diego homeowners route poison-free work through us
The program the law leaves, run in full
Since AB 1788 and AB 1322, a San Diego home cannot lawfully be baited with second-generation anticoagulants or diphacinone, and the contractors we route leave the remaining legal baits out as well. Every job is sealing, snap trapping and a monitoring cycle, with any old bait removed on the first visit. That is compliance with the California Department of Pesticide Regulation's reading of the law and it is the method that ends the problem, because a closed eave is the only thing a rat cannot come back through.
AB 1788, effective January 1, 2021; AB 1322, effective January 1, 2024 (California Department of Pesticide Regulation Q&A pages)
The body ends up in the trap
A snap trap on the run puts the animal where it can be removed, and a sealed shell means there is no next animal, so the dead-in-the-wall call and the poisoned-pet call are removed from the job before it starts. The EPA's own description of anticoagulants, with death arriving days to two weeks after feeding begins, is the reason a baited rat has time to reach a wall void. Jobs we route are built so that question never comes up.
EPA: anticoagulant rodenticides kill 4 days to 2 weeks after feeding begins
Sealed to the standard, quoted apart
Sealing is quoted as its own line, opening by opening, with the material named, and trapping is quoted separately, so the number can be compared with any other bid. The closures are measured against the quarter-inch figure UF/IFAS gives as the rat-proofing standard, in hardware cloth and sheet metal, with a manufactured bird stop on tile eaves. The free inspection produces the list, and the closure record you receive at the end is what any warranty terms attach to.
UF/IFAS: a quarter-inch opening is the rat-proofing standard; mouse quarter inch, rat half inch
What Reddit Says About Poison-Free Rodent Control in San Diego
The poison question is the one homeowner threads argue about hardest, and the consensus on r/pestcontrol lands where California law now sits: seal the house and trap, and treat bait as the thing that creates the next problem. People vet companies by asking for several bids on the same written scope, by insisting that sealing, trapping and any monitoring plan are separate lines, and by asking whether the company does the sealing itself. A company that turns up with bait stations and no ladder is the one they tell each other to send away.
The red flags are specific to bait. A poison-only plan with nothing sealed is the single most criticized practice in the corpus. The line that poison makes rats thirsty so they run outside for water is named as a myth, and the people who repeat it are treated as either uninformed or dishonest. Dead-animal odor in a wall after a bait job is a major secondary fear and drives its own searches. Long monitoring contracts folded into the removal price, and companies that come back month after month with the same result, round out the list.
The questions they pass around apply directly: what exactly is included and what is a separate line? Is the sealing warrantied, and does it renew? How many follow-up visits are in the price? What happens if they come back? Will you clean and decontaminate, or only trap? To those, a San Diego homeowner can add one: what products does the proposal place, and are they legal at a house in this state?
The contractors we route answer that last question before it is asked, because the program they run at a home has no rodenticide in it.
A common poison-free call from a Mission Hills canyon lot
The situation: A couple in a 1920s Craftsman on a Mission Hills canyon rim have a raised foundation, open eaves, a queen palm with an untrimmed skirt at the back fence and a dog that spends its days in the yard. Last fall a company placed bait blocks in the attic and the crawl space. The scratching stopped, a smell settled into the hallway wall for three weeks, and by January the scratching was back. This time they want the dog out of the equation and the noise gone for good.
What gets done: Whoever attends finds the old bait blocks and removes them, then works the shell: six foundation vents with torn screens, an open gap at the eave where the roof decking meets the top of the wall on the canyon side, and a pipe penetration under the kitchen. Each vent gets quarter-inch 18 to 22 gauge hardware cloth screwed to the framing, the eave gap gets sheet metal, and the pipe hole gets mortar around a metal collar. Snap traps in enclosed stations go on the runs in the attic and along the crawl-space sill the same afternoon. The palm skirt goes on a pruning list, and the trap check is set for a week out.
How it turns out: The traps take four roof rats in the first week and none after. The monitoring visit finds no fresh droppings, the closure list names the six vents, the eave and the pipe with the materials at each, and the dog spends the winter in a yard with nothing poisoned in it.
Poison-free questions from San Diego homeowners
These questions come from people who have tried bait, been offered bait, or want to know what the law now allows at their house.
Is rat poison illegal in California now?
The strongest products are prohibited at homes and most other sites. AB 1788 removed brodifacoum, bromadiolone, difenacoum and difethialone from use anywhere except a short list of site types on January 1, 2021, and AB 1322 added diphacinone to the same list on January 1, 2024. Warfarin, chlorophacinone, bromethalin and cholecalciferol remain legal for a licensed applicator, so poison as a category is restricted and narrowed, and the practical result at a San Diego house is a trapping and sealing job. The California Department of Pesticide Regulation's Q&A pages are the place to read the details.
Can I still buy rat bait at the hardware store and use it myself?
Consumer products are outside the scope of the two bills, which govern licensed and commercial use, and some over-the-counter baits remain on shelves. Whether you should is a different question. A bait block in the attic of a San Diego house has the same two outcomes it has for a pest company: an animal that dies in a wall, or an animal that dies in the yard where a dog, a cat or a canyon owl finds it. The Department of Fish and Wildlife's advice to homeowners is exclusion and trapping, and the free inspection will tell you which openings to close first.
Do I need a permit to trap rats in San Diego?
No. Roof rats and house mice are non-native species with no protected status in California, so trapping them needs no permit from the Department of Fish and Wildlife. The rule that does apply is the prohibition on trapping wildlife and releasing it elsewhere, which is why trapped rats are dispatched and why live-catch-and-relocate is off the table. Squirrels and other native animals in an attic are a different case with their own rules, and the inspection identifies which animal is in the roof before anything is set.
Are snap traps safe with kids and pets in the house?
Yes, when they are placed where the rats run and where children and pets cannot go. On most San Diego jobs that is the attic and the crawl space, which a child or a dog never enters. Where a run passes through a garage or a utility room, traps go inside enclosed tamper-resistant stations that a rat enters and a paw cannot. A snap trap has none of the food-chain risk that bait carries, which is the reason it is the method of choice in a house with a dog in the yard.
Will poison-free control take longer than bait?
Usually it is shorter, because sealing on the first visit stops the resupply that keeps a bait program running. HomeGuide's 2026 figures put a light infestation at a few days of trapping and only a heavy, long-established one at one to two months. The trap placement runs at least a week because roof rats are cautious around new objects, and the monitoring visit adds a few more days. A bait program, by contrast, waits days to two weeks for each animal to die and then starts over when the next one comes in through the same eave.
Tried bait already? Book the inspection and start the poison-free program.
Book a free inspection for poison-free rodent control in San Diego
Call (619) 853-5729 or use the form to describe the house, the noise and any bait already placed. The line is staffed around the clock and the inspection costs nothing.