Overall
- Santa Rosa-Petaluma
- 107.8
- Lancaster
- 98.3
Diff -9.5 RPP
Santa Rosa-Petaluma vs Lancaster
Cost of living comparison based on BEA Regional Price Parities. Lancaster is 8.8% less expensive than Santa Rosa-Petaluma.
8.8% less expensive
Lancaster, PA is 8.8% less expensive than Santa Rosa-Petaluma, CA on BEA Regional Price Parities (overall RPP 98.3 vs 107.8). A $100,000 salary in Santa Rosa-Petaluma buys about the same as $91,161 in Lancaster; the largest component gap is services.
- Overall RPP 107.8 (Santa Rosa-Petaluma) vs 98.3 (Lancaster)
- $100k in Santa Rosa-Petaluma ≈ $91,161 purchasing power in Lancaster
- Services drives the gap (-47.5 RPP points)
RPP parity plate
Pair CA:PA 107.8→98.3
TIER-GAP · CROSS-STATE · SERVICES-LED · BENCH-CROSS · PP-SHIFT
- TIER-GAP Clear tier gap
- CROSS-STATE CA × PA
- SERVICES-LED Services-led gap
- BENCH-CROSS Benchmark cross
- PP-SHIFT PP shift
Instrument codes from this pair's BEA Regional Price Parities (overall · goods · services · rents · national benchmark 100 · purchasing-power conversion), not a ranking or recommendation.
What This Comparison Actually Tells You
Santa Rosa-Petaluma, CA and Lancaster, PA sit in clearly different price tiers, separated by 9.5 RPP points. At this distance, treating the same nominal salary as equivalent would materially change purchasing power.
This route crosses the national benchmark: Santa Rosa-Petaluma is above 100 while Lancaster is below it. That makes the move a change of price regime, not merely a rank swap.
Services leads the difference, with Lancaster 47.5 points lower than Santa Rosa-Petaluma. Goods, services, and rents all point in the same broad direction, making the headline comparison more transferable across household types.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
For a service-heavy household, test childcare, health, and other locally supplied costs before relying on rent alone. The BEA ratio converts $100,000 in Santa Rosa-Petaluma to $91,161 in Lancaster, but it is not a personal spending weight.
How the Price Gap Changed
Santa Rosa-Petaluma and Lancaster share 17 published annual releases from 2008 through 2024. Their overall gap narrowed, moving from 17.9 to 9.5 RPP points. Santa Rosa-Petaluma remained the higher-index metro in the latest release.
Services changed the most within this pair: its gap moved 41.5 points between the first and latest shared releases (6.1 to 47.5 points). This describes a relative price-index history, not a forecast or a household budget.
| Release Year | Santa Rosa-Petaluma RPP | Lancaster RPP | Relative Gap |
|---|---|---|---|
| 2008 | 118.1 | 100.2 | 17.9 points Santa Rosa-Petaluma higher |
| 2012 | 112.3 | 97.8 | 14.5 points Santa Rosa-Petaluma higher |
| 2016 | 115.1 | 99.4 | 15.7 points Santa Rosa-Petaluma higher |
| 2020 | 111.4 | 97.9 | 13.5 points Santa Rosa-Petaluma higher |
| 2024 | 107.8 | 98.3 | 9.5 points Santa Rosa-Petaluma higher |
Annual BEA Regional Price Parity releases; a higher index means a higher price level relative to the national average of 100. Selected years shown from the full shared series.
Category Breakdown
Goods
- Santa Rosa-Petaluma
- 105.2
- Lancaster
- 100.7
Diff -4.5 RPP
Services
- Santa Rosa-Petaluma
- 154.8
- Lancaster
- 107.3
Diff -47.5 RPP
Rents
- Santa Rosa-Petaluma
- 139.6
- Lancaster
- 93.8
Diff -45.8 RPP
| Category | Santa Rosa-Petaluma | Lancaster | Difference |
|---|---|---|---|
| Overall | 107.8 | 98.3 | -9.5 |
| Goods | 105.2 | 100.7 | -4.5 |
| Services | 154.8 | 107.3 | -47.5 |
| Rents | 139.6 | 93.8 | -45.8 |
Visual Comparison
Overall
Santa Rosa-Petaluma 107.8
Lancaster 98.3
Goods
Santa Rosa-Petaluma 105.2
Lancaster 100.7
Services
Santa Rosa-Petaluma 154.8
Lancaster 107.3
Rents
Santa Rosa-Petaluma 139.6
Lancaster 93.8
Vertical line = national average (100)
Salary Equivalents
What a salary in Santa Rosa-Petaluma would need to be in Lancaster for the same purchasing power:
| In Santa Rosa-Petaluma | In Lancaster | Difference |
|---|---|---|
| $50,000 | $45,581 | $-4,419 |
| $75,000 | $68,371 | $-6,629 |
| $100,000 | $91,161 | $-8,839 |
| $150,000 | $136,742 | $-13,258 |
$ in Santa Rosa-Petaluma = in Lancaster
Same BEA Regional Price Parity ratio as the table above (107.8 → 98.3), computed live from your number, nothing is sent anywhere.
Santa Rosa-Petaluma
107.8
Cost Index
Lancaster
98.3
Cost Index
Frequently Asked Questions
Is Lancaster more expensive than Santa Rosa-Petaluma?
Lancaster is 8.8% less expensive than Santa Rosa-Petaluma. The overall cost index is 98.3 vs 107.8 (national average = 100).
What salary in Lancaster equals $100K in Santa Rosa-Petaluma?
A $100,000 salary in Santa Rosa-Petaluma has the same purchasing power as $91,161 in Lancaster. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Santa Rosa-Petaluma and Lancaster?
Rents in Santa Rosa-Petaluma are indexed at 139.6 while Lancaster is at 93.8 (national average = 100). Santa Rosa-Petaluma has higher rents.
Data sources
- BEA Regional Price Parities (RPP), the cost-of-living indices shown on this page
- U.S. Census Bureau, American Community Survey (ACS), gross-rent observations behind the rents component
- BLS Consumer Price Index (CPI), goods and services price relatives
- BLS Occupational Employment and Wage Statistics (OEWS), labor-driven services component
- HUD Fair Market Rents (FMR), 40th-percentile rent cross-reference
Every figure on PlainCost is rendered directly from BEA Regional Price Parity source data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, our changelog, or report a data error. Data current as of 2026-08-11. Rankings measure the published cost-of-living index only; we don't recommend where to live or rate any metro's quality of life.