Spider Control in Markham
If you need spider control in Markham, AstraHive Pest Control offers licensed treatment backed by a 90-day warranty. Health Canada says spiders move indoors in the fall, so autumn is when most spider problems start in Markham.
Spiders near Markham: what the sightings show
GBIF, the open biodiversity database, holds 112 recorded sightings of house and cobweb spiders within roughly 13 km of Markham, and the busiest month is September with 48.
| Species or group | Recorded sightings |
|---|---|
| Common house spider (Parasteatoda tepidariorum) | 73 |
| Northern cobweb spider (Steatoda borealis) | 1 |
| Domestic house spider (Tegenaria domestica) | 23 |
| Cellar spider (Pholcus phalangioides) | 15 |
Source: GBIF.org occurrence records for Canada. These are observations logged by naturalists and museums, so counts show where people looked as well as where a species lives.
Within about 3 km of the centre of Markham, OpenStreetMap maps 41 wooded areas and 31 named parks, including Millenium Park, George Coatup park, Thomas McQuay Park and Debbi Wilkes Park. Health units describe ticks as living in wooded or brushy areas, leaf litter and tall grass.
Markham's warm months at a glance
Environment and Climate Change Canada climate normals 1981 to 2010, Toronto Buttonville A station, 2.7 km from Markham. A station is the nearest one with a full set of normals, not a reading from your street.
What this means for spiders: they follow insects and warmth indoors as it cools, so the autumn months on this chart are when more are seen.
Spiders in your Markham home or building?
Our licensed technicians start with an inspection and a clear plan for your property.
Call 905-925-8427How AstraHive Pest Control gets rid of spiders in Markham
- Inspection of where spiders hide indoors and how they get in.
- Exterior barrier around the foundation, doors, windows and entry points.
- Interior treatment or wall-void dust only where the inspection shows it is needed.
- Monitors so we can track activity after treatment. If spiders come back, we come back at no extra cost.
Products are Health Canada approved and applied according to the product label, and our technicians are licensed by the Ontario Ministry of the Environment, Conservation and Parks (MECP). Our spiders work is backed by a 90-day warranty.
More on spiders for Markham homeowners
| What the guides say | Guide |
|---|---|
| Black widow spiders are rare in Canada and live mainly in the south, near the United States border. | Health Canada: spiders |
| A basement, crawl space, or bathroom with poor airflow hits those numbers easily, especially in Ontario's humid summers or after a wet spring. But moisture alone doesn't explain why they're inside your walls instead of outside under a rock. | Centipedes in Your Basement? Here's What They're Actually Telling You |
| Quick tip: If you're catching more than one centipede a week in the same room, don't just kill it, check under sinks, near floor drains, and around the sump pit for standing moisture. That's almost always where the real activity is. | Centipedes in Your Basement? Here's What They're Actually Telling You |
Detached homes and exterior walls in Markham
56% of homes in Markham are detached houses, with more exterior wall, window and light fixture for spiders to build on than an apartment has. Exterior lights draw the insects spiders feed on.
Source: Statistics Canada, 2021 Census, private households in Markham. Shares of occupied private dwellings.
Parks, trees and water around Markham
OpenStreetMap maps 92 parks, gardens and golf courses within 3 km and 45 wooded areas within 3 km of the centre of Markham. Spiders follow the insects they eat, which are most plentiful near parks, trees and water.
Counts of features mapped in OpenStreetMap within the stated distance of the centre of Markham. They show what contributors have mapped, which varies from place to place, not how many pests there are.
What to Check Before You Call for Treatment in Markham
Our guide Why Spiders Are Inside Your Home (And What They're Actually Following) covers this in full. This is the part that matters most when you check a home in Markham.
- Where the spiders are actually found, not just where the last web was
- Where webs repeatedly reappear
- Whether insects are visible nearby, day or night
- Whether exterior lights are drawing insects toward doors or windows
- Whether moisture is present, condensation, damp soil, plumbing leaks
- Whether activity is concentrated on one side or level of the house
The Toronto Buttonville A station near Markham records about 149 days a year at or below freezing, so the cold season is long enough that spiders keep trying to move into heated buildings.
What spider control looks like in Markham
Most of the work is outside, around the foundation, doors and windows, with interior treatment only where the inspection shows spiders harbouring. See our guide to spiders in the home in Ontario. We also serve Unionville, Cathedraltown, Commerce Valley, Berczy Village, Thornhill.
- Climate station: Toronto Buttonville A, 2.7 km from Markham.
- Public health unit: York Region Public Health.
- By-law: Property Standards By-law.
- Nearby areas we serve: Unionville (2 km), Cathedraltown (4 km), Commerce Valley (4 km), Berczy Village (6 km), Thornhill (8 km).
Areas near Markham that we also serve
| Page | Distance from Markham | Direction |
|---|---|---|
| Spider control Unionville | 2 km | northeast |
| Spider control Cathedraltown | 4 km | north |
| Spider control Commerce Valley | 4 km | southwest |
| Spider control Berczy Village | 6 km | northeast |
| Spider control Thornhill | 8 km | southwest |
| Spider control Wismer | 8 km | northeast |
Straight-line distances between area centres, rounded.
When spiders are recorded near Markham, month by month
112 recorded sightings of spiders fall within about 13 km of Markham. The busiest month is Sep with 48 records, and none are recorded in Oct, Dec.
| Species or group | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Common house spider | 2 | 2 | 3 | 5 | 3 | 12 | 16 | 19 | 48 | . | 1 | . |
| Northern cobweb spider | . | . | . | . | . | . | . | . | . | . | . | . |
| Domestic house spider | . | . | . | . | . | . | . | . | . | . | . | . |
| Cellar spider | . | . | . | . | . | . | . | . | . | . | . | . |
| All recorded | 2 | 2 | 3 | 5 | 3 | 12 | 16 | 19 | 48 | . | 1 | . |
Source: GBIF.org occurrence records for Canada within about 13 km of Markham, all years. Records show where and when people looked, not how many pests there are.
Frequently asked questions: Markham
Why do I see more spiders in September and October in Markham?
Health Canada says spiders look for warm places in the fall. The Toronto Buttonville A normals show the mean temperature falling from 15.7 degrees Celsius in September to 3.1 in November.
When do freezing nights start in Markham?
The Toronto Buttonville A station's normals show nights at or below freezing beginning in October, about 149 days a year in total.
Does Markham regulate pests on private property?
A dwelling must be kept free of rodents, vermin and insects at all times, and extermination methods must follow the Pesticides Act.
Sources
- City of Markham: Property Standards By-law (2017) . section 14 pest prevention
- City of Markham: Property Standards . composters, rodents and insects
- Tribunals Ontario, Landlord and Tenant Board: Maintenance and Repairs . landlords must control pests such as cockroaches and mice; municipal standards
- York Region: YorkSafe Inspection Reports . published food premises inspection reports
- Health Canada: Spiders (pest control tips) . fall entry, prevention, chemicals
- Environment and Climate Change Canada: Canadian Climate Normals 1981-2010 . monthly temperature, precipitation, frost days and degree-days
- Statistics Canada: structural type of dwelling by tenure, 2021 Census (table 98-10-0240-01) . dwelling types and renter households
- Statistics Canada: dwelling condition by period of construction, 2021 Census (table 98-10-0233-01) . age of homes and repair needs