Markham Pest Control

Pest Control in Markham

Sterex Pest Control provides residential and commercial pest control across Markham, including Unionville, Cornell, and Milliken. Scope, pricing, and any service-specific warranty terms are confirmed before work begins.

What matters in Markham

Markham is majority detached housing with a substantial condo and townhouse share along Highway 7 and Unionville, so exterior sealing carries most residential work while the denser corridors behave more like multi-unit buildings.

Markham ranges from heritage properties in Unionville and Old Markham Village to newer subdivisions in Cornell, Wismer, Berczy, and Greensborough, plus mid- and high-rise development along Highway 7. Inspection points differ by building type: damp framing and rooflines in older properties, garage junctions and interlock edges in newer subdivisions, and shared pathways in multi-unit buildings.

Markham housing mix

56.2%

of 110,870 occupied private dwellings are single-detached

56.2% of Markham's 110,870 occupied private dwellings are single-detached. Exterior entry points are therefore important inspection targets, while Highway 7 and Unionville multi-unit buildings also require checks of shared plumbing and wall pathways.

Source: Statistics Canada, 2021 Census of Population.

Common pests in Markham

What we treat here

Markham's high-density condo corridor in Milliken and Unionville sees regular cockroach and bed bug pressure. Mice are common in Markham's newer subdivisions in fall and winter. Ants peak across the city in late spring and summer. Raccoons are active in Cornell and greenbelt-adjacent neighbourhoods during spring baby season.

Most-requested pricing

What Markham customers ask about most

Bed bug treatmentFrom $400

1 bedroom, 2-visit steam + spray + dust

Mice treatmentFrom $200

Townhome; bait stations + accessible gaps sealed

Wasp nest removalFrom $175

Accessible exterior nest under 9 ft

All prices are before HST. Severe infestations are quoted upfront.

Full Ontario price list

Seasonal pattern

When each problem shows up in Markham

Spring (March-May)

Ant trails along interlock and foundations, carpenter ant swarmers in older Unionville and Old Markham properties, and wildlife entry during denning season.

Summer (June-August)

Wasp nests on soffits, decks, sheds, and stone-veneer gaps across the detached subdivisions.

Fall (September-November)

Mice can enter through garage seals, foundation gaps, and utility penetrations. Summer travel and moving are also useful times to review bed bug prevention and inspection steps.

Winter (December-February)

Interior rodent work, plus year-round cockroach and bed bug treatment in the condo corridor.

Local rules and programs

What applies specifically in Markham

Who handles rodent complaints in York Region

York Region Public Health investigates rodent complaints in food premises, schools, institutions, hospitals, and child care centres. For private homes, rodent control is the property owner's responsibility; apartment tenants should notify the landlord, who is responsible under the Residential Tenancies Act, and condominium boards carry that duty under the Ontario Condominium Act.

York Region — Preventing rats and rodent infestations

Seal gaps larger than a quarter inch

York Region recommends covering vents with metal mesh, fitting drains with tight grates, and sealing foundation cracks wider than a quarter inch, since rodents can pass through an opening the size of a nickel. On Markham's newer subdivision housing the openings that matter most are garage door seals and utility penetrations at grade.

York Region — Preventing rats and rodent infestations

Commercial work in Markham

Markham's commercial base is weighted toward office and technology campuses, retail plazas, and a dense restaurant scene along Highway 7 and in Unionville. Food premises need documented pest programs that hold up to a York Region public health inspection.

Commercial pest control

Wildlife pressure in Markham

Properties near the Rouge corridor and mature canopy through Unionville and Old Markham should include roof vents, soffit corners, and garage-to-roof junctions in a wildlife entry inspection.

Wildlife removal and exclusion

Service coverage

Neighbourhoods in Markham

Richmond Hill and Thornhill sit immediately west and north of Markham; searches from those areas commonly reach Sterex through the York Region service pages and the bed bug guide.

Unionville

Milliken

Buttonville

Berczy Village

Cornell

Cathedraltown

Greensborough

Thornhill

Box Grove

Most requested in Markham

Start with the service that matches your problem

Bed bug treatment Ant control Mice and rat control Spider control Cockroach control Restaurant pest control

Frequently asked questions

Pest control questions for Markham

Yes. The Sterex bed bug package is a two-visit programme combining steam, spray, and dust, starting at $400 + HST for a one-bedroom unit. Steam is used because it treats on contact and reaches seams, frames, and folds without leaving residue on sleeping surfaces; the spray and dust components handle what steam cannot reach. Markham, Richmond Hill, Thornhill, and the rest of York Region are covered from this page.

Newer builds are not sealed against rodents as thoroughly as people expect. The recurring routes are garage door seals that have worn at the corners, the unsealed gap where utilities pass from the garage into the house, and cable or hose-bib penetrations at grade. York Region's guidance is to seal any opening wider than a quarter inch, because a mouse can pass through a hole the size of a nickel.

All of Markham, including Unionville, Milliken, Cornell, Wismer, Berczy, Greensborough, Box Grove, and Old Markham Village, plus neighbouring Thornhill. Older Unionville and Old Markham properties tend to need carpenter ant and wildlife work, while the newer subdivisions generate more rodent and pavement ant calls.

Under the Ontario Condominium Act the condominium board is responsible for maintaining the property, and York Region Public Health points tenants in rental units to their landlord, who carries that duty under the Residential Tenancies Act. For an owner-occupied unit, coordinating with property management matters when the pest is one that travels between units, such as cockroaches or bed bugs.

Ontario structural extermination licenceWSIB-covered and insuredTimestamped report after every visit3-month residential warranty*About Sterex

*Warranty applies when prep is completed, technician recommendations are followed, and structural entry points are addressed.

Local sources