Flooring across Utah
Nine cities, nine different housing stocks, and nine different answers to the same question. Every figure here is that city's own Census number.
Oldest housing stock first
Median year built and the share of homes predating 1940, by city, alongside the surrounding county. The gap between the two columns on the right is the story in half these places.
| City | Median year built | Built before 1940 | County median |
|---|---|---|---|
| Salt Lake City | 1965 | 33.7% | Salt Lake County — 1986 |
| Ogden | 1966 | 27.8% | Weber County — 1984 |
| Provo | 1983 | 11.9% | Utah County — 2001 |
| West Valley City | 1985 | 1.8% | Salt Lake County — 1986 |
| Sandy | 1985 | 2.2% | Salt Lake County — 1986 |
| Orem | 1989 | 3.1% | Utah County — 2001 |
| Layton | 1993 | 1.4% | Davis County — 1993 |
| West Jordan | 1995 | 0.7% | Salt Lake County — 1986 |
| St. George | 2007 | 0.8% | Washington County — 2003 |
| Lehi | 2007 | 3.0% | Utah County — 2001 |
Housing figures for this page: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, tables B25034 and B25035.
Pick your city
Each page covers that city's housing stock, what it does to a floor, and installed cost ranges adjusted for regional labor.
Why the city matters more than you would think
Salt Lake City’s median house was built in 1965 with 33.7% predating 1940. Lehi’s was built in 2007, with 76.1% of it going up since 2000. Those are the same state and a twenty-eight-year gap, and they are not the same job.
Lehi splits the other way from the state as a whole: 76.1% of its housing has gone up since 2000 against 38.6% statewide, and 3.0% predates 1940 against 9.1%. It is the newest housing in Utah and it asks the newest question — what the slab reads.
Questions people actually ask
How long does a new concrete slab need before flooring goes down?
Long enough to pass a moisture test, which is not the same as a number of weeks. The rule of thumb is about thirty days per inch of thickness in good drying conditions, but the answer that matters comes from an in-situ relative humidity probe under ASTM F2170, drilled to 40% of the slab depth and left to equilibrate at least 24 hours. Most wood flooring wants 75–80% RH or below.
What happens if flooring goes down over a slab that is still wet?
The moisture has nowhere to go but up, into the adhesive and the flooring. Glued floors debond, seams peak, engineered wood cups, and organic growth can start underneath where nobody sees it until there is a smell. None of it shows up on day one, which is why the test matters more than how the slab looks.
Do I need a licensed contractor to install flooring in Utah?
It depends on the material, and the rule is unusually clear. Utah's S220 Carpentry and Flooring classification covers wood, laminate, tile, sanding and finishing, underlayment and subfloors. Carpet, vinyl sheet, vinyl tile and vinyl plank installation are expressly exempt as work that does not significantly affect public health, safety or welfare. An unlicensed carpet or LVP installer here is operating exactly as the rule intends. Insurance, references and a written contract are the checks worth making in either case.
Why do my wood floors gap in the winter in Utah?
Dry air. Indoor humidity through a Utah heating season runs very low, and wood releases moisture into dry air and shrinks across the width of each board, opening gaps at the seams. Holding the house in the 30–40% range through winter is what keeps it in check. A floor that was properly acclimated before installation gaps far less.
Is my Salt Lake City house likely to have hardwood under the carpet?
More likely than anywhere else in the state. A third of Salt Lake City's housing predates 1940 and the median home was built in 1965, so original oak under carpet is a routine find rather than a lucky one. Ogden is the other good bet at 27.8% prewar. In Lehi or St. George, where three-quarters of the housing went up this century, it is essentially never there.