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Ants in the Home

Posted on 8 Jun 2026

Ants are a common, seasonal nuisance in homes and gardens across Stevenage. They are not harmful to health, but they can be persistent once they locate a food source.

This page provides guidance on preventing ant infestations, treating them safely, and knowing when to seek further advice.

1. Understanding ants

  • The most common species found in homes is the Black Garden Ant.
  • Ants enter properties in search of sweet foods, water, and shelter.
  • Once a food source is found, ants leave a scent trail, attracting more ants to the same spot.

2. Preventing ant problems

Food & Hygiene

  • Wipe up spills immediately, especially sugary drinks.
  • Store food in sealed containers.
  • Clean worktops, floors, and skirting boards regularly to remove scent trails.
  • Empty bins frequently and keep bin lids closed.

Property Maintenance

  • Seal cracks around doors, windows, and pipework.
  • Repair damaged brickwork or mortar where ants may nest.
  • Keep outdoor areas tidy and free from food waste.

3. Treating ants indoors

Non‑Chemical Methods

  • Clean affected areas with hot soapy water or white vinegar to remove scent trails.
  • Vacuum up visible ants and dispose of the bag immediately.

Chemical Treatments

If the problem persists, you may use over‑the‑counter ant control products such as:

  • Ant bait gels (most effective; ants carry poison back to the nest).
  • Ant powder for cracks and crevices.
  • Surface sprays for short‑term control.

Always follow the manufacturer’s instructions and keep products away from children and pets.

4. Treating ants outdoors

  • Locate the nest if possible (often found under paving slabs, in soil, or near walls).
  • Apply ant powder or boiling water directly to the nest for rapid control.
  • Avoid leaving pet food or uncovered waste outside.

5. Flying ants

Flying ants appear during warm summer weather as part of the ants’ mating cycle. They are not a sign of infestation and usually disappear within 24–48 hours.

6. When to contact the council

Stevenage Borough Council does not usually provide treatment for ants, as they are not considered a public health pest. However, you may contact the council for:

  • Advice on persistent infestations
  • Issues affecting communal areas or neighbouring properties

Customer Service Centre: 01438 242242

7. Professional pest control

If DIY treatments are unsuccessful, you may wish to contact a professional pest control service. Look for companies registered with:

  • The British Pest Control Association (BPCA)
  • The National Pest Technicians Association (NPTA)

You can also contact our pest control contractor:

For ant treatment costs, please see 'Environmental Health fees and charges'. 

8. Quick checklist

  • Keep food sealed
  • Clean surfaces daily
  • Block entry points
  • Use bait gels for long‑term control
  • Treat nests outdoors where possible.