Multi-Tenant Property Leak Detection in the Greater Seattle Area
Identify the responsible unit fast - limit damage, limit disputes, limit tenant disruption.
When water shows up in one unit, the source is often in another. Multi-tenant leaks are equal parts technical problem and political problem: the longer you spend identifying the responsible unit, the more units you have to disturb. Simply Leak Detection works with property managers, HOAs, and owners across the Greater Seattle Area to find the source the first time and document it clearly.

How multi-tenant locates are different
Water doesn't respect unit lines. A leak two floors up can surface in a ceiling on the ground floor; a slab leak in one unit can soak the wall of its neighbor. The locate has to account for the building's actual plumbing topology - risers, branch lines, recirculation, and the way finishes channel water along structural framing.
We start by reviewing plans where available, then isolate risers and branches to confirm the affected system before we start opening anything in occupied units.
Apartments, condos, and HOA properties
We routinely work on garden-style apartments, mid-rise condos, townhomes, and mixed-use buildings. Once the source unit is identified, we mark the exact location of the leak and provide a written summary included with the invoice - both the locate and the documentation matter for assigning repair responsibility and for insurance.
Recommended first steps to identify hidden leaks
- Inspect all units for running toilets, running sinks and that all appliances are working properly.
- Inspect meter for movement during inspections for movement while tenants are not using water.
- Turn off all units at the building shutoff and inspect meter for movement (to confirm if leak is inside or outside).
- Inspect all hot water tank relief valves
- Turn off any irrigation watering systems that might be supplied by a meter showing movement and recheck for meter movement.
If a leak exists and cannot be found with these simple steps, Simply Leak Detection will help you find it without need to unearth or dismantle your property in search of it. Our leak detection process is non-invasive and safe to existing landscapes and structures.
Why fast identification limits damage
Multi-tenant water damage compounds. Every hour the source is unknown, finishes in more units soak, more drywall comes off, and more tenants need accommodation. A prompt locate is the cheapest part of the whole event.
- ◆Outdoor underground water main or irrigation leaks
- ◆Slab and inter-floor leaks affecting adjacent tenants
- ◆Concealed leaks behind tubs, showers, and laundry stacks
- ◆Riser and branch leaks between units and floors
- Isolate leak area (outdoor, indoor, suspect units)
- Coordinate access to affected and adjacent units
- Pinpoint with acoustic, thermal, and moisture instruments
- Document with photos and a written summary included with the invoice for the property file
We've spent more than a decade working with property managers across the Greater Seattle Area. We know how to walk into an occupied building, get the right access without disrupting other tenants, and leave a clean paper trail - locate, photos, and summary - that the manager and insurer can both act on.
Simply Leak Detection can successfully locate hidden water pipe leaks whether deep underground, under parking lots, under concrete slabs or within the walls of your multi-tenant property. We can often save you thousands by locating the leak for repair without creating needless additional damage to your property.
Three steps. No guessing.
Schedule
Call or message to book a time. We gather details so we arrive ready.
Non-invasive inspection
Acoustic sensors, tracer gas, and other non-invasive techniques - no jackhammers, no guesswork.
Clear written summary
Exact location and photos in a summary of findings included with every invoice.
Other ways we help

Commercial Leak Detection
Locate leaks in commercial buildings without shutting down tenants or operations.
Explore service →
Slab Leak Detection
Pinpoint under-slab leaks without jackhammering your floor.
Explore service →Fire Suppression Leak Detection
Locate leaks in fire sprinkler and suppression lines without unnecessarily disabling the system.
Explore service →Have a leak across multiple units? Let's locate the source - fast and discreetly.
Get your FREE quote today
Suspect a multi-tenant property leak detection issue? Call now or send a quick message. We respond fast and provide clear pricing before any work begins.