Start with your building type
- IfYou live in a condo or apartment with units above youThenCeiling stains and wall growth may come from the unit above. Notify the association or landlord and the upstairs occupant in writing.
- IfYou live on a ground floor or garden levelThenWatch walls along the slab and exterior, where grading and irrigation can push water in.
- IfYou own a detached homeThenThe usual suburban sources apply: bath fan ducts, water heaters, basement finishes and window wells.
- IfYour home is in a newer development areaThenCheck builder documentation and any coverage period before arranging repairs yourself.
What sets Lone Tree apart
Lone Tree incorporated as a city in the mid-1990s and runs its own building division, unlike unincorporated Highlands Ranch next door, which relies on Douglas County. If rebuilding after remediation needs a permit, the City of Lone Tree is the place to ask.
Much of the city's housing is multifamily. In stacked condominiums and apartments, plumbing for several units often runs through shared vertical chases. A leak from a toilet supply or a dishwasher on an upper floor can travel down a chase and appear as ceiling or wall growth one or two floors below, sometimes far from where the leak started.
Single-family neighborhoods in Lone Tree are a mix of 1980s and 1990s subdivisions and more recent construction. Their issues resemble those in Highlands Ranch, with attics, finished basements and bathrooms leading the list.
Condo and apartment sources
| Source | How it shows up | Who to notify |
|---|---|---|
| Upstairs bathroom or kitchen leak | Stains and spotting on your ceiling | The upstairs owner or tenant, and the association or landlord |
| Shared plumbing stack | Damp wall in a closet or bathroom with no fixture of your own | Association or property management |
| Balcony or deck drainage | Staining on the wall or ceiling beside a sliding door | Association, where it maintains exteriors |
| Shared HVAC or dryer chases | Musty air at vents or closets | Association or property management |
If water is coming from another unit
Stop the flow if you can
Knock on the upstairs door, and contact building management. If nobody responds and water is pouring, the building may have an emergency maintenance line.
Document
Photograph the ceiling, walls and anything damaged, with dates.
Give written notice
Email the association or landlord and keep a copy.
Call your insurer
Report it under your own condo or renters policy, even if another unit caused it.
General information for Highlands Ranch, not a quote or professional advice. In an emergency, call 911.