How Long Do Condo Building Components Last?

Last updated November 5, 2026. General information, not legal or financial advice.

Every number in a condo reserve study rests on two guesses for each component: how long that kind of thing usually lasts, and how much life this one has left. The first is called useful life. The second is remaining life. California’s reserve summary asks for both, along with the replacement cost, for each major component.

Where useful lives come from

There’s no single official list for condos. One public source is HUD’s useful-life table for the capital needs assessments it requires on multifamily buildings it insures. HUD calls these standard lives and lets the person preparing the assessment set a different remaining life if they explain why. That’s a sound way to read any list like this.

The figures below are from HUD’s “Family” column. HUD gives longer lives for some items in elderly housing.

Roofs, walls and balconies

Component	HUD standard useful life
Asphalt shingle roof	20 years
Built-up roof with gravel	20 years
Rubber membrane roof (EPDM)	15 years
Thermoplastic membrane roof (TPO)	15 years
Vinyl siding	25 years
Metal and glass curtain wall	40 years
Caulking and sealing	15 years
Balcony, wood frame	25 years
Balcony, wood decking	20 years
Balcony, steel frame or concrete	40 years

Sealants are easy to miss. They’re cheap per foot, but a building has a lot of feet, and the work often needs lifts or scaffolding.

Elevators

Component	HUD standard useful life
Controller, call and dispatch	10 years
Cab interior finish	10 years
Shaftway doors	10 years
Machinery	20 years
Hoist rails and cables	20 years
Cab frame	35 years

Elevators are replaced in parts. An elevator modernization usually bundles several of these into one project, so a study may group them.

Heating, cooling and plumbing

Component	HUD standard useful life
Chilling plant	20 years
Cooling tower	25 years
Hydronic pumps	20 years
Domestic hot water circulating pumps	15 years
Cast iron waste piping	75 years
Copper supply pipe, hard	75 years

Fire and life safety

Component	HUD standard useful life
Sprinklers and standpipes	50 years
Fire pumps	20 years
Smoke and fire detection central panel	15 years
Emergency generator	25 years
Emergency lights and lit signs	5 years

Common interiors and site

Component	HUD standard useful life
Carpet in common areas	6 years
Interior paint in common areas	15 years
Exterior paints and stains	8 years
Asphalt pavement	25 years
Asphalt seal coat	5 years
Pool deck	15 years
Pool pumps and equipment	10 years

Why your study may say something else

A standard life is an average for a type of item. Your building’s numbers can be shorter or longer, and a good study says why:

Condition on the site visit. A roof that leaks today has little life left, whatever its age.
Upkeep. Regular sealing, coating and service stretch lives. Skipped upkeep shortens them.
Climate and exposure. Sun, salt air, freeze-thaw cycles and heavy use all count.
Reports from specialists. Elevator, facade or garage reports may set the timing better than any table.
Grouped projects. Items replaced together, such as a roof and its flashing, may share one date.

If a study’s remaining lives all moved later since the last one, with no work done and no reason given, ask why. Our guide to reading a condo reserve study lists other things to check.

Taller buildings

Elevators, curtain walls, central plants and fire pumps mostly show up in mid-rise and high-rise buildings. See what our condo reserve studies cover. We quote mid-rise and high-rise buildings in writing.