Standard Indoor Web Builder • Harmless but Disturbing

Common House Spider – Connecticut Identification & Prevention Guide:

The common house spider is the species most homeowners find indoors year-round. They are harmless and help control flying insects, but large webs can become a nuisance.

Identification:

• Size: 3⁄16–5⁄16 inch
• Color: Brown mottled pattern
• Abdomen: Rounded with small stripes
• Web: Tangled, irregular cobwebs

Females build larger webs than males.

Behavior & Habitat:

House spiders prefer:

• Basements
• Corners of rooms
• Stairwells
• Window frames
• Garages
• Utility rooms

They spin messy, tangled webs and wait for flying insects.

Why They Are Common in Connecticut:

CT homes provide:

• Basements
• High humidity
• Plenty of prey insects

Activity increases in late summer and fall when insects move indoors.

Are House Spiders Dangerous?

No — they are completely harmless and rarely bite.

They help reduce:

• Mosquitoes
• Flies
• Gnats

When to Call a Professional:

If webs reappear rapidly or spiders seem widespread, professional treatment can reduce populations.

• Spider Control CT
   
• Yellow Sac Spider Page 
• Pest Prevention