Expected Useful Life (EUL)
The average years a building component is estimated to function when new and maintained; taken from a published table such as HUD's.
By Nicolas Reimer, Founder, Baseline PCR · E2018-24 s3.2 · Published September 18, 2026
Expected useful life is the starting point of every reserve line. E2018 defines it as the average period a component is estimated to function without material repair when new and properly maintained. The guide does not supply values; consultants take them from a published table. The HUD CNA e-Tool table is public domain and organised by the E2018 outline; Fannie Mae's Form 4099.F table is the source on agency multifamily work. The two differ for some components, and the report should cite which it used, ideally by table and row.
EUL is a table value, not an observation. The observation enters through remaining useful life, which is the field observer's opinion, and effective age, which is EUL minus RUL. See the HUD table and the reserve table explained.
Related: remaining useful life, effective age, long-term costs.
Sources
- ASTM E2018-24, Standard Guide for Property Condition Assessments (ASTM International)
- HUD, Estimated Useful Life Table for the CNA e-Tool
ASTM E2018-24 is copyrighted by ASTM International and is paraphrased here, never reproduced; buy the guide from ASTM to read the text. This page is general information for practitioners, not engineering, legal or lending advice.