King County’s median single-family home closed at $887,300 in late 2025. Surprise’s 2025 year-to-date median sold price came in at approximately $430,000. Goodyear’s tracked at approximately $475,000. No destination in the Phoenix Valley produces a larger gap between King County proceeds and purchase price than the West Valley. This page is for King County sellers who want to understand what the maximum equity-extraction scenario actually looks like in dollar terms and what that retained capital can be redeployed into.
A King County homeowner selling at the October 2025 NWMLS-reported median of $887,300 nets approximately $834,000 to $838,000 in estimated proceeds after standard transaction costs of roughly 6%. The arithmetic from there depends on which West Valley city the purchase lands in.
Purchasing in Surprise at the 2025 YTD median of approximately $430,000 — including standard Arizona closing costs of $8,000 to $12,000 — leaves an estimated $392,000 to $400,000 in retained equity. Purchasing in Goodyear at the 2025 YTD median of approximately $475,000 leaves an estimated $347,000 to $355,000 in retained equity. Either figure represents a financial restructuring of a scope that is simply not achievable in other Valley markets at comparable price points. At the Surprise median, a King County seller walks away from the transaction with a retained cash position roughly equivalent to a full additional down payment on a second property, a mortgage elimination on the new home, or a decade of maximally funded retirement contributions.
The property tax dimension adds a further annual advantage. King County’s effective property tax rate is approximately 0.92% (Washington State Department of Revenue, 2025). Maricopa County’s effective rate runs approximately 0.52% (Maricopa County Treasurer, 2025). On a Surprise purchase at $430,000, the annual Maricopa County property tax bill runs approximately $2,236 — compared to approximately $8,163 on the King County home. That is an annual savings of approximately $5,927. On a Goodyear purchase at $475,000, the annual bill runs approximately $2,470, yielding an annual savings of approximately $5,693. Over a ten-year holding period, either scenario produces more than $56,000 in cumulative property tax savings before accounting for assessed-value changes on either side.
Estimated retained equity for a King County seller purchasing at the Surprise 2025 YTD median (~$430,000), after standard transaction costs on both sides — the highest equity-retention figure of any primary Phoenix Valley destination market.
Sources: NWMLS, October 2025; Phoenix REALTORS / ARMLS, 2025 year-to-date data through October
Surprise and Goodyear 2025 year-to-date median sold prices for single-family homes, respectively. Both represent the lowest price tiers among the primary Phoenix Valley destination markets for King County relocators.
Source: Phoenix REALTORS / ARMLS, 2025 year-to-date data through October 2025 (AZ Big Media / Phoenix REALTORS annual report)
No single destination in the Seattle-to-Phoenix silo is right for every King County seller. The table below maps the primary destinations against estimated equity-retention outcomes at the King County median of $887,300 (est. net proceeds: ~$834,000).
The pattern is clear: the West Valley delivers the highest retained equity per dollar of King County proceeds. The tradeoff is commute distance. Surprise sits approximately 37 to 40 miles northwest of Sky Harbor International Airport and approximately 30 miles northwest of central Phoenix employment nodes. Goodyear sits approximately 20 to 25 miles west of central Phoenix via the I-10 corridor. For King County sellers whose financial objective is to maximize the cash extracted from the sale while purchasing a significantly larger physical asset, no destination in the Phoenix Valley matches what the West Valley produces.
| Destination | 2025 Median Price | Est. Equity Retained | Profile |
|---|---|---|---|
| Surprise | ~$430,000 | ~$392,000–$400,000 | Max equity retention; newest inventory corridors; largest lots per dollar |
| Goodyear | ~$475,000 | ~$347,000–$355,000 | Strong transaction volume; growing infrastructure build-out; I-10 access |
| Chandler | ~$565,000 | ~$255,000–$265,000 | Established East Valley grid; Loop 202 corridor access |
| North Phoenix | ~$630,000 | ~$190,000–$214,000 | Newer builds; Loop 101/I-17 freeway position; premium construction tier |
| Scottsdale | ~$1,180,000 | Proceeds stretch or deficit | Valley's premium positioning; closest analog to upper King County tier |
Price data: Phoenix REALTORS / ARMLS 2025 YTD. Equity retention estimates assume ~$834,000 net proceeds and standard AZ closing costs. Scottsdale figure per Phoenix REALTORS / ARMLS 2025 YTD.
The West Valley encompasses a broad arc of development running along the I-10 and US-60 corridors west of Loop 303, anchored by Goodyear to the south and Surprise to the north. Both cities are among the fastest-growing municipalities in Maricopa County by transaction volume and new-construction permitting, and both offer a different value proposition for a King County buyer arriving with strong cash proceeds.
Goodyear (2025 YTD through October) Median sold price: approximately $475,000 (slight decline of ~1.2% year-over-year from $481,000) Closed sales growth: +27.2% year-over-year Pending sales growth: +24.4% year-over-year New listings growth: +16.9% year-over-year Months supply of inventory: 4.1 months (below the Greater Phoenix metro average of 4.4 months) Average days on market: approximately 75 days Primary freeway access: I-10 (direct east-west connection to central Phoenix); Loop 303 (north-south connector) HOA infrastructure: Present across the majority of master-planned inventory; documented amenities in active communities include community pools, parks, and trail access Build-out status: Active new construction alongside established 2000s–2015 resale inventory
Surprise (2025 YTD through October) Median sold price: approximately $430,000 (declined ~1.4% year-over-year from $436,000) Closed sales growth: +6.1% year-over-year Pending sales growth: +3.7% year-over-year New listings growth: +14.1% year-over-year Months supply of inventory: 4.8 months Average days on market: approximately 80 days Primary freeway access: US-60 (Grand Avenue); Loop 303 (primary north-south connector); SR-303L to I-10 Build-out status: Active new construction in outer corridors; mix with resale inventory in established grid
The transaction volume story in both cities merits emphasis: Goodyear’s 27.2% year-over-year increase in closed sales was the largest growth figure of any primary Phoenix Valley destination city tracked by Phoenix REALTORS in 2025 year-to-date data. That figure reflects the durable demand pull of a market where price points remain accessible to equity-rich buyers and lot sizes remain significantly larger than what equivalent dollars produce in the East Valley.
Year-over-year increase in closed sales volume for Goodyear and Surprise, respectively, in 2025 year-to-date data through October 2025. Both cities outpaced the Greater Phoenix metro closed sales growth rate of 3.8% for the same period.
Source: Phoenix REALTORS, 2025 year-to-date market data through October (AZ Big Media, January 2026)
The West Valley’s core equity proposition is not just about retained cash. It is about what the same dollar produces in physical terms. A King County homeowner currently occupying 1,600 to 1,900 square feet on a 5,000-square-foot lot at the King County median can purchase a home in the 2,400 to 3,200 square foot range on a 7,500 to 10,000-square-foot lot in Surprise at the $430,000 median and retain $370,000 to $400,000 in net cash alongside it.
At Surprise’s $500,000 to $550,000 tier well within reach of a King County seller at the median inventory in the 2,800 to 3,600 square foot range on lots approaching 10,000 to 12,000 square feet is broadly available. At $550,000 to $650,000 in Goodyear, 3,200 to 4,200 square foot homes on lots of 10,000 square feet and above represent a significant share of available inventory. A King County seller at $1.0M to $1.1M common in Bellevue, Kirkland, or Redmond enters the West Valley with approximately $940,000 to $1,034,000 in estimated net proceeds and can access inventory in the 3,800 to 5,000 square foot range on oversized lots while retaining $350,000 to $500,000 in net capital.
That output ratio square footage delivered per dollar of King County proceeds is the defining financial characteristic of the West Valley relative to every other destination market in this silo.
| King County Proceeds Tier | Surprise Purchase Tier | Est. Sq Footage | Est. Equity Retained |
|---|---|---|---|
| ~$834,000 (KC median) | $430,000–$450,000 | 2,400–3,200 sf | ~$370,000–$400,000 |
| ~$834,000 (KC median) | $500,000–$575,000 | 2,800–3,600 sf | ~$245,000–$325,000 |
| ~$940,000 ($1.0M KC sale) | $550,000–$650,000 | 3,200–4,200 sf | ~$275,000–$375,000 |
| ~$1,034,000 ($1.1M KC) | $600,000–$700,000 | 3,600–5,000 sf | ~$320,000–$420,000 |
Price and square footage ranges: ARMLS / Phoenix REALTORS West Valley 2025 data. Equity retained estimates assume standard AZ closing costs of $8,000–$12,000 and respective King County transaction costs at ~6%.
Washington levies no state income tax on wages, which can lead King County homeowners to underestimate how much of their net worth is eroded annually by property taxes on mid-to-upper-tier King County homes. At the King County effective rate of approximately 0.92% (Washington State Department of Revenue, 2025), the annual property tax bill on an $887,300 home runs approximately $8,163. In Maricopa County at an effective rate of approximately 0.52% (Maricopa County Treasurer, 2025), the annual bill on a West Valley purchase is substantially lower.
Washington’s capital gains excise tax (7% on long-term gains exceeding $250,000 annually, enacted 2021) is a second tax variable for King County homeowners with material investment portfolios. A household realizing $400,000 in brokerage capital gains in the same year as their home sale faces an approximately $10,500 Washington capital gains liability on the amount above the $250,000 threshold. Establishing Arizona residency before triggering those gains eliminates that liability, since Arizona taxes capital gains as ordinary income at the 2.5% flat rate. For households coordinating a home sale with investment account liquidations, this timing consideration can add five to six figures to the effective value of the move. A tax advisor should be consulted before finalizing the sequencing.
| Scenario | Annual Property Tax | 10-Year Cumulative |
|---|---|---|
| King County ($887,300 @ 0.92%) | ~$8,163/yr | ~$81,630 |
| Surprise purchase ($430K @ 0.52%) | ~$2,236/yr | ~$22,360 |
| Annual savings — Surprise | ~$5,927/yr | ~$59,270 |
| Goodyear purchase ($475K @ 0.52%) | ~$2,470/yr | ~$24,700 |
| Annual savings — Goodyear | ~$5,693/yr | ~$56,930 |
Sources: Washington State Department of Revenue, 2025; Maricopa County Treasurer, 2025. 10-year figures assume flat assessed value for illustrative purposes; actual savings will vary based on assessed value changes in both markets.
Washington state is the second-largest origin state for Arizona-bound migration in IRS Statistics of Income data. In the 2021–2022 filing year, 16,600 Washington state tax filers relocated to Arizona — ranking Washington behind only California among all states as a source of new Arizona residents. The net domestic migration gain for Arizona in that filing year was 36,714, placing the state seventh nationally.
The income bracket structure of this migration is particularly relevant to the West Valley’s value proposition. According to analysis of IRS SOI data, Arizona’s net inflow in the $100,000 to $200,000 AGI bracket has accelerated faster than any lower bracket in recent years — a pattern consistent with equity-driven relocation decisions made by homeowning households with substantial accumulated property value. The West Valley’s price tier is the direct financial expression of what those households do with their King County proceeds when they elect to maximize retained capital over proximity to central Phoenix employment centers.
Phoenix REALTORS data confirm the West Valley’s standing as an accelerating destination within the Valley itself. Goodyear’s 27.2% year-over-year increase in closed sales in 2025 was the strongest growth rate of any primary Phoenix Valley city tracked through October 2025. That figure is not driven by distressed inventory or price collapse — Goodyear’s median declined only 1.2% year-over-year while transaction volume surged. It reflects buyer demand concentrated in a price tier accessible to equity-rich in-migrants who are optimizing the conversion of out-of-state proceeds into Arizona real estate.
Washington state residents relocated to Arizona in the 2021–2022 IRS filing year — the second-largest state-to-state migration corridor into Arizona that year.
Source: IRS Statistics of Income, State-to-State Migration Data, 2021–2022