When the lilacs bloom in Detroit, so do the ant colonies. Michigan's short, warm season triggers a burst of activity, and homeowners from Rosedale Park to Grosse Pointe's border streets start seeing trails across kitchen floors. The city's older wood-frame houses and shaded lots also host carpenter ants, which are less common but can cause serious damage if left alone.
PestMinistry is a referral service that connects you to independent, licensed ant control providers in our network. We do not apply treatments ourselves.
Three ants worth recognizing
- Pavement ants are small, brown-black and live under sidewalks, driveway slabs and basement floors. They carry out crumbs from kitchens in long lines.
- Carpenter ants are big, usually black, and nest in damp or rotting wood: window sills, porch beams, tree stumps and hollow trees.
- Odorous house ants smell like rotten coconut when crushed and are drawn to sweets, honeydew from aphids and spilled juice.
The treatment depends on the species. Pavement and odorous house ants are usually managed with baits and exterior treatments; carpenter ants require locating the nest, which may be inside a wall or outside in a tree.
Why moisture is the key
Carpenter ants prefer wood that is already damp. In Detroit that frequently means window frames with failed seals, an attic with a roof leak, porch roofs with bad flashing, or firewood stacked against siding. If you see sawdust-like debris, called frass, at the base of a wall, or hear faint rustling in a wall at night, call for an inspection. Every year that damp wood stays in place gives the colony more time to expand into adjacent timber.
How a provider approaches it
- Observe ant trails to find where they enter and where they are traveling.
- Inspect likely nest sites: sills, crawl spaces, tree limbs, stumps and fence posts.
- Apply baits for sugar-feeding species and nest-targeted treatments for carpenter ants.
- Treat the building perimeter where ants are entering.
- Recommend fixes for leaks and rot.
Be patient with baits. Ants may appear to increase for a few days as workers take the bait back to the colony, and that is a sign it is working.
Everyday habits that help
- Wipe down counters after cooking and clean up sticky spills.
- Store honey, sugar and cereal in sealed containers.
- Clear gutters and shrink the mulch layer around the foundation.
- Prune tree limbs that touch the roof.
- Caulk gaps around window frames and utility lines.
Ants in apartments and commercial spaces
Detroit has a growing number of converted lofts, restaurants and shops in Midtown, Corktown and downtown. In these buildings ants usually travel through wall voids and pipe chases from one unit to another, and a sweet spill in one kitchen can feed a colony that appears in three apartments. Property managers do best when they schedule treatments across the building rather than unit by unit, keep dumpster areas clean, and ask tenants to report ant trails early, before the colony has time to establish multiple satellite nests.
Contact us
For ants that keep coming back, call (844) 725-1661. We will connect you with a licensed provider in our network serving Detroit.
Detroit ant FAQs
Why are ants invading my house after rain?
Heavy rain floods ground nests, so colonies move to drier spots, often inside your home.
Do I need to treat an ant mound in my lawn?
Only if the ants are entering the house or are numerous in play areas. Otherwise they are largely harmless.
Can carpenter ants really harm a house?
Yes, over time. They hollow out wood to nest, and an established colony can weaken framing, especially where moisture persists.
Are natural remedies enough?
Wiping surfaces and removing food helps, but it rarely solves a colony problem by itself.