Is leak detection worth it in a multifamily building?

The short answer

For most buildings, yes, but the value shows up as avoided loss rather than new income. Water damage and freezing caused 22.6% of homeowners insurance losses in 2023, with an average claim of about $15,400 over 2019-2023, according to the Insurance Information Institute. Leak detection catches water early, before a slow leak becomes a claim. PropertyAlpha does not put a national dollar figure on it, because the value depends on each building's own claims history, deductible and insurance terms.

Updated October 2026 · PropertyAlpha benchmarks (engine 2026.11-v3) · Figures are modeled

22.6%
Of homeowners insurance losses from water damage and freezing (2023, Triple-I)
$15,400
Average water damage and freezing claim, 2019-2023 (Triple-I)

Why there is no national dollar figure

A dollar figure for leak detection would need your claims history, your deductible, your plumbing and your insurer's terms. A national average would be precise-looking and wrong for most buildings. So the free Property Impact Report describes leak detection and the full Impact Model quantifies it with your building's data.

The Insurance Information Institute figures above are national homeowners data. They are the clearest public gauge of how much water loss costs, and PropertyAlpha uses them as context, not as a projection for any building.

What it protects

  • The units below and beside a leak, not just the one where it starts.
  • Common areas, mechanical rooms and risers.
  • Rent and residents. A water event can take units offline and disrupt the people who live there.
  • The deductible. Many water losses fall partly or entirely below it, so the owner pays directly.

What changes the value

  • Claims history and deductible size.
  • Building age and plumbing.
  • Coverage: sensors at water heaters, under sinks, at washers and in risers, and whether automatic shutoff valves are installed.
  • Response. Alerts only help if someone acts on them.

Insurance and financing

Some insurers recognize water protection in their terms. Those terms vary by carrier, and PropertyAlpha does not publish premium savings percentages.

Water savings can also count toward green financing thresholds:

  • Fannie Mae Green Rewards: preferential loan pricing and up to 5% additional loan proceeds for improvements projected to cut a property's energy and water use by at least 30% combined, with at least 15% from energy.
  • Freddie Mac Green Advantage offers a parallel pricing path.
  • Program terms change. Treat this as a reason to screen your building, not as a loan commitment or eligibility decision.

What is it worth to your building?

The free Property Impact Report applies these benchmarks to your property, by class and unit count, and shows the method behind every number.

Run your Impact Analysis

Sources

Related questions

Figures are modeled decision-support: not a guarantee, not an appraisal, not investment advice. Third-party figures are national context, not projections for any one property.