ZIP-level modelled home values
Promontory’s ZIP Code, 2020 to 2026
Research question
Is Promontory in Park City a good investment, and what can public data actually answer?
Public data can answer the area question, not the club question. The ZIP that contains Promontory, 84098, rose 70.1% from February 2020 to August 2026 and 4.8% in the last year — ahead of Salt Lake City’s 50.2% but behind Old Town Park City’s 104.6%. No public index measures Promontory itself, and club membership costs sit outside every figure here.
Research by Kamee Shrope
Geography: ZIP: 84098 (Snyderville Basin, Park City), compared with 84060, 84117 and 84106
Period: February 2020 through August 2026, with August 2019, 2021, 2023 and 2025 checkpoints
+70.1%
84098 since February 2020
Salt Lake City’s 84106: +50.2%
+4.8%
Last twelve months
Old Town Park City: +7.6%
$1,382,166
Typical 84098 home value
August 2026, all home types
The area has appreciated faster than the valley, slower than Old Town
Promontory sits inside ZIP code 84098, the Snyderville Basin side of Park City. Zillow’s typical home value there rose from $812,368 in February 2020 to $1,382,166 in August 2026, a gain of 70.1%. Over the same period Salt Lake City’s 84106 rose 50.2% and Holladay’s 84117 rose 51.9%.
Old Town Park City, ZIP 84060, outran both at 104.6%, reaching $2,198,714. The two Park City ZIP codes are not one market: the scarce, walkable, ski-adjacent stock in 84060 has behaved differently from the larger-lot basin properties in 84098.
The last twelve months were calmer everywhere — 84098 up 4.8%, 84060 up 7.6%, Salt Lake City up 3.4%. The steep part of the curve was 2020 to 2021, not the period since.
Zillow Home Value Index, typical home value by ZIP code
| Month | 84098 Park City basin | 84060 Old Town | 84117 Holladay | 84106 Salt Lake City |
|---|---|---|---|---|
| August 2019 | $795,393 | $1,053,322 | $439,961 | $379,557 |
| February 2020 | $812,368 | $1,074,437 | $460,136 | $397,994 |
| August 2021 | $1,135,656 | $1,490,330 | $607,976 | $530,437 |
| August 2023 | $1,298,922 | $1,841,027 | $646,257 | $560,194 |
| August 2025 | $1,319,411 | $2,044,207 | $672,110 | $578,435 |
| August 2026 | $1,382,166 | $2,198,714 | $699,004 | $597,830 |
| Change since Feb 2020 | +70.1% | +104.6% | +51.9% | +50.2% |
| Change in last 12 months | +4.8% | +7.6% | +4.0% | +3.4% |
- Month
- August 2019
- 84098 Park City basin
- $795,393
- 84060 Old Town
- $1,053,322
- 84117 Holladay
- $439,961
- 84106 Salt Lake City
- $379,557
- Month
- February 2020
- 84098 Park City basin
- $812,368
- 84060 Old Town
- $1,074,437
- 84117 Holladay
- $460,136
- 84106 Salt Lake City
- $397,994
- Month
- August 2021
- 84098 Park City basin
- $1,135,656
- 84060 Old Town
- $1,490,330
- 84117 Holladay
- $607,976
- 84106 Salt Lake City
- $530,437
- Month
- August 2023
- 84098 Park City basin
- $1,298,922
- 84060 Old Town
- $1,841,027
- 84117 Holladay
- $646,257
- 84106 Salt Lake City
- $560,194
- Month
- August 2025
- 84098 Park City basin
- $1,319,411
- 84060 Old Town
- $2,044,207
- 84117 Holladay
- $672,110
- 84106 Salt Lake City
- $578,435
- Month
- August 2026
- 84098 Park City basin
- $1,382,166
- 84060 Old Town
- $2,198,714
- 84117 Holladay
- $699,004
- 84106 Salt Lake City
- $597,830
- Month
- Change since Feb 2020
- 84098 Park City basin
- +70.1%
- 84060 Old Town
- +104.6%
- 84117 Holladay
- +51.9%
- 84106 Salt Lake City
- +50.2%
- Month
- Change in last 12 months
- 84098 Park City basin
- +4.8%
- 84060 Old Town
- +7.6%
- 84117 Holladay
- +4.0%
- 84106 Salt Lake City
- +3.4%
Four things this data cannot tell you about Promontory
First, 84098 is a ZIP code, not a subdivision. It contains Promontory alongside much of the Snyderville Basin, and the index describes all of it. A gated golf community and a 1990s basin subdivision move the same number.
Second, Promontory is a private club community, and club membership is bought separately from the house. Those costs — the membership itself and the recurring dues — appear in no public index, and they materially change the total cost of ownership. Ask the club directly for its current membership and dues schedule before running any return calculation.
Third, a value index is not a sale price. ZHVI models the typical home in the middle of the market; it does not report what any particular property sold for, and in a community with a wide spread between cabins, homesites and estates the typical figure describes few actual homes.
Fourth, "a good investment" depends on how a property is used. A second home that is occupied six weeks a year, a home that is nightly-rented where permitted, and a primary residence have different carrying costs, tax treatment and outcomes from identical appreciation.
Methodology
- 1.Downloaded Zillow’s ZIP-code ZHVI file (all home types, smoothed and seasonally adjusted, 35th–65th percentile) on October 4, 2026, covering months through August 31, 2026.
- 2.Read the rows for 84098 and 84060 in Summit County and 84117 and 84106 in Salt Lake County without adjustment.
- 3.Used February 2020 as the pre-pandemic baseline and August of each year as the comparison point, so no comparison spans a partial month.
- 4.Calculated percentage changes from the unrounded index values and rounded only for display.
Limits
- ZIP 84098 covers far more than Promontory. No public index measures a single club community, and this report should not be read as a Promontory-specific valuation.
- ZHVI is a modelled typical value, not a median sale price or an appraisal, and Zillow revises its history.
- Club membership and dues, nightly-rental rules, HOA obligations and transfer fees are outside every figure here and can dominate the economics of a purchase in a community of this type.
- Past appreciation does not forecast future appreciation.
Sources and provenance
Retrieved: October 4, 2026; ZIP-level smoothed, seasonally adjusted file through August 31, 2026
Modelled estimate of the typical value for homes in the 35th to 65th percentile of a ZIP code. It is not a median sale price, an appraisal, or a subdivision-level figure.
Companion article