Nobody's real estate agent mentions this, but your first week in a Phuket home will involve a quiet reckoning with the fact that you've moved into an established neighbourhood — and many of the existing residents have six legs. This isn't a problem unique to cheap rentals or old houses. A 60,000 THB/month pool villa in Bang Tao gets ants. A Phuket Town apartment on the 8th floor gets geckos. A hillside house in Rawai gets centipedes.
The good news is that after seven years here, I can tell you with confidence: most of it is manageable, some of it is actually fine (geckos are your friends), and only a small portion requires genuine concern. The bad news is that a lot of the advice floating around in expat Facebook groups is wrong — particularly around spraying, which often makes ant and cockroach problems worse, not better.
This is the guide I wish I'd had when I moved in.
Phuket Pests: The Quick Overview
- Ants: Universally present; manageable with gel bait, not spray
- Cockroaches: Common in wet areas; serious infestations need professional treatment
- Mosquitoes: Dengue risk is real — prevention is non-negotiable
- Geckos: Welcome guests — they eat mosquitoes and small insects
- Centipedes: Painful bite; not dangerous to healthy adults but medical attention recommended
- Termites: Serious structural risk in older wooden properties; annual inspection advised
- Rats/mice: Possible in older buildings and near markets; requires landlord action
- Professional pest control: 800–2,500 THB for a standard house treatment
The Critter-by-Critter Guide
Let's go through the main pests you'll encounter in Phuket homes with realistic threat assessments and actual solutions.
🐜 Ants Medium nuisance
Multiple species. Tiny ghost ants invade kitchens. Larger red ants bite and sting. Fire ants are occasionally found in gardens. They're everywhere in Phuket and will find any food source left uncovered.
🪳 Cockroaches Medium concern
American cockroaches (large, outdoors) and German cockroaches (small, kitchen/bathroom). German cockroaches require professional treatment if established. They carry bacteria and their frass can trigger asthma.
🦟 Mosquitoes Genuine health risk
Aedes aegypti (dengue/Zika vector) is active during the day. Anopheles mosquitoes (malaria, rare in Phuket) are nocturnal. Dengue cases peak during monsoon season. Prevention is essential.
🦎 Geckos Welcome guests
House geckos (tokay and common) are beneficial. They eat mosquitoes, ants, small cockroaches, and moths. Their chirping is part of the Phuket soundtrack. Do not relocate them — they're protecting you.
🐛 Centipedes Respect required
Giant tropical centipedes (up to 20cm) can deliver a painful, burning bite. Not typically life-threatening to healthy adults but extremely unpleasant and medically advised to treat. Most common in garden areas, hillside homes.
🕷️ Spiders Mostly harmless
Huntsman spiders are common and can be startling (large and fast) but are harmless and excellent pest controllers. Cellar spiders (long legs) similarly harmless. Shake shoes left outside as precaution.
🐀 Rats & Mice Landlord issue
More common in older buildings and near markets or food vendors. Roof rats can access homes through gaps around pipes and roof tiles. Signs include droppings, gnawed wires, and scurrying sounds in ceilings at night.
🪲 Termites Structural risk
Subterranean and drywood termites both present in Phuket. Can cause serious structural damage in wooden homes or older buildings. Annual inspection recommended, especially if buying or renting an older property.
Ants: The Most Common Battle
Ants are the number one pest complaint from Phuket expats, and most people deal with them incorrectly. Here's the critical mistake: spraying ant killer on the trail you can see. This kills only the 5% of the colony that's foraging. The other 95% — including the queen — is underground or inside a wall and completely unaffected. Within 24 hours, they route around the dead and rebuild.
The Right Approach: Gel Bait
Gel bait (brands like Advion Ant Gel, Maxforce FC, or Thai equivalents available at HomePro) works by allowing workers to carry the bait back to the colony, where it kills the queen and the rest of the nest within 1–3 weeks. Apply small dots near ant trails, along baseboards, and under appliances. Don't clean the area or spray — you'll remove or contaminate the bait.
For tiny ghost ants invading the kitchen, store everything in airtight containers (cheap at Makro), keep counters dry, and don't leave dishes overnight. A silicone sealant around sink and appliance gaps also dramatically reduces access points.
For pantry storage, double-bag everything that comes in soft packaging — rice, pasta, flour, sugar, pet food. Resealable containers from Index Living Mall or HomePro are worth the investment. An organised pantry with airtight containers removes roughly 80% of the reason ants enter your kitchen.
Cockroaches: When to Call a Professional
The large American cockroaches you see occasionally (especially after rain) are primarily outdoor insects that wander in. They're unpleasant but not a sign of an infestation. The smaller German cockroaches — tan, about 15mm, extremely fast — are the ones to take seriously. If you see them in your kitchen or bathroom in numbers, call a professional immediately.
German cockroach infestations require professional gel bait treatment placed in the right locations (inside cabinet hinges, under appliances, behind drawer runners) — not spraying, which typically scatters the population into wall voids without killing the colony. A professional treatment costs 800–1,500 THB and most reputable companies offer a follow-up warranty.
Prevention for Cockroaches
- Fix leaking pipes — cockroaches need moisture as much as food
- Keep drain covers on when not in use (they enter through drains)
- Seal gaps around pipes where they enter walls (silicone sealant)
- Don't leave pet food bowls overnight
- Empty rubbish bins daily, or use bins with tight-fitting lids
Mosquitoes: The One You Take Seriously
Dengue fever is real in Phuket. Cases spike during monsoon season (June–October) when standing water is abundant. The Aedes aegypti mosquito that transmits dengue is a daytime biter — most active at dawn and dusk — and breeds in small amounts of standing water, including pot plant saucers, AC drain trays, blocked gutters, and even bottle caps.
Prevention That Actually Works
- Eliminate standing water: Check pot plant saucers, water features, anything that collects rain. Empty them weekly or treat with mosquito larvae tablets (Bacillus thuringiensis, available at agricultural stores).
- Window and door screens: If your unit doesn't have them, your landlord should fit them — include it in lease negotiations. This single measure dramatically reduces mosquito exposure at home. See our guide on landlord versus tenant responsibilities.
- Plug-in repellent devices: Raid and Tiger Brand plug-in mat dispensers work well in bedrooms. Replace mats every 30 days.
- Personal repellent: DEET-based spray for outdoor evenings (30% DEET is adequate for Phuket). Thai pharmacies stock good options — look for brands with actual DEET percentage listed.
- Air conditioning: Mosquitoes don't like cold air. Sleeping with the AC on and no open windows eliminates most night-time exposure.
Dengue symptoms: sudden high fever, severe headache, pain behind the eyes, muscle and joint pain, rash. If you develop these symptoms — especially the eye pain and joint pain together — go to Bangkok Hospital Phuket or Siriroj immediately and ask for a dengue NS1 test. Dengue can become life-threatening if not properly managed. Don't take aspirin or ibuprofen (blood thinning risk) — paracetamol only until diagnosed.
Centipedes: Respect, Don't Panic
Finding a 15–20cm centipede in your bathroom at 2am is a rite of passage in Phuket. They're more common in hillside homes (Rawai, Chalong, Kamala hills) than in urban or beachfront areas, and more frequent during and after heavy rain.
The bite is a two-fang puncture and delivers venom that causes immediate, severe burning pain that typically lasts 4–8 hours, with localised swelling. It's not typically life-threatening to healthy adults but children and those with allergies should go to hospital. For everyone else, washing the bite area, taking antihistamine, and applying cold compress is the standard first response. If pain is severe or spreading, seek medical attention at your nearest clinic or Bangkok Hospital Phuket.
Reducing Centipede Access
- Clear leaf litter, wood piles, and debris from around the base of your home — centipedes shelter in damp organic material
- Seal cracks in floors, walls, and around pipe entries with silicone or expanding foam
- Always shake out shoes, towels, and clothing left on the floor before use (especially footwear left outside)
- Keep the area under furniture clear and well-lit — centipedes avoid bright, dry areas
- If you're finding them regularly inside, a professional perimeter spray treatment (500–1,000 THB) applied quarterly can significantly reduce incursions
Professional Pest Control in Phuket: Costs and When to Call
| Service Type | What's Covered | Cost (approx THB) | Frequency |
|---|---|---|---|
| General inspection | Assessment, advice, no treatment | Free–500 | As needed |
| Ant treatment (gel bait) | Interior bait placement, advice | 500–1,200 | One-off or quarterly |
| Cockroach treatment | Gel bait + targeted spray voids | 800–1,800 | One-off; follow-up at 2–4 weeks |
| Mosquito fogging | Exterior yard and garden fog | 500–1,500 | Monthly during monsoon season |
| Termite inspection | Visual inspection + probing | 800–2,000 | Annual |
| Termite treatment (soil) | Chemical barrier treatment | 5,000–25,000+ | Every 5 years or at infestation |
| Full house quarterly programme | All common pests, perimeter + interior | 2,500–5,000/visit | Quarterly |
| Prices for a standard 3-bedroom house. Prices vary by company, area, and severity of infestation. Always get 2–3 quotes. | |||
Under Thai rental law, a landlord is responsible for maintaining the property in a habitable condition — which includes addressing pest infestations that existed before you moved in or that result from structural deficiencies (e.g., gaps in walls, missing drain covers). If you have a cockroach infestation from day one, document it with photos and notify your landlord in writing. See our guide on landlord vs tenant maintenance responsibilities for more detail.
Finding a Reliable Pest Control Company in Phuket
There are dozens of pest control companies in Phuket ranging from professional and effective to unreliable spray-and-run operations. Here's how to choose well:
- Ask for their method before they visit. A reputable company will ask what pest you have and explain which product and method they'll use. If they just say "spray everything" for an ant or cockroach problem, find someone else.
- Check for a Department of Agriculture licence. Professional pest control companies in Thailand must be registered. Ask to see credentials.
- Look for expat community recommendations. The Phuket Expat Community and Bang Tao/Laguna Facebook groups regularly share reliable pest control recommendations and warnings about companies to avoid.
- Get a written quote and scope of work. Ensure it specifies what chemicals will be used, what areas will be treated, and what the warranty period is.
Seasonal Pest Patterns in Phuket
Pest activity in Phuket is genuinely seasonal, and knowing the patterns helps you prepare rather than react.
May–October (Monsoon Season): The most challenging period. Heavy rain drives centipedes, cockroaches, and ants inside to escape flooding. Mosquito populations spike with standing water. This is the season to be proactive — schedule preventive treatments before the rain season starts (April–May), not after problems appear.
November–February (Cool-Dry Season): Quieter for most pests. Mosquito pressure eases significantly. Good time for termite inspection before the wet season creates more structural moisture. Some homes in cooler hillside areas see more centipede activity as temperatures drop at night.
March–May (Hot-Dry Season): Ants become more active as they search for water and food ahead of the rains. This is often when kitchen ant invasions are worst — dry outside, food and moisture inside. Keep kitchen especially clean and bait regularly during this period.
Frequently Asked Questions
More Phuket Housing Guides
- Landlord vs Tenant: Property Maintenance Guide — who pays for pest control
- Mold and Humidity in Phuket Homes — the other tropical housing challenge
- Swimming Pool Maintenance in Phuket — mosquito breeding risk and upkeep
- Phuket Rental Contract Guide — get pest control responsibility in writing
- Healthcare in Phuket — where to go for centipede bites and dengue treatment
Questions about Phuket rental conditions?
We can help with specific housing questions — from lease negotiation to maintenance disputes.
