Comps for 20506 Old Mill Rd SW
Vashon sales and listings, roughly April 2025 to October 2026, that share Old Mill's shape: a 1,300 to 2,700 sq ft house on land with a shop or finished outbuilding. Prices from NWMLS via Estately, Redfin, Windermere Vashon, Orchard, and Krishna. "Recent (date unconfirmed)" means it appears on Windermere's current sold list, which isn't dated. Compiled Oct 5, 2026.
| Fit | Address | Status | Price | House sq ft bed/bath · built | Acres | Shop / outbuildings | Notes | Links |
|---|---|---|---|---|---|---|---|---|
| Subject | 20506 Old Mill Rd SW West-central, Misty Isle | Active, listed Sep 28, 2026 | $917,000 ask | 2,143 3/3 · 1983 | 4.72 | 24x36 shop + 24x24 tall garage, ~1,674 sf (county shows 770) | Wall furnace, shared Group B well, septic, Open Space on ~3.7 ac. Studio + flex behind garage not on county record. | Listing · Zillow · Redfin · County |
| Closest match | 10519 SW 188th St Center, borders Island Center Forest | Sold, past 12 months | $981,500 | 2,040 3/2 | 5 | 3-car garage w/ 1,000+ sf shop; detached studio with water | Metal roof, solar, Generac, new panel, on sewer. One level. Best comp. | Listing · Zillow · Redfin · County |
| Closest match | 19840 Vashon Hwy SW Center | Sold, past 12 months | $1,275,000 | 2,258 2/2 | 5 | Oversize 2-car garage + shop, 650 sf; matching outbuilding; studio | Craftsman, high finish, one level, Generac. The ceiling. | Listing · Zillow · Redfin · County |
| Closest match | 28526 143rd Ave SW Tahlequah, south end | Sold, recent (date unconfirmed) | $934,000 | 2,690 3/2 | 10 | Garage + shop, other outbuildings | Open Space enrolled, potential second home site. Stone, hardwood, CVG fir. | Listing · Zillow · Redfin · County |
| Closest match | 13205 SW 196th St West side | Sold, recent (date unconfirmed) | $773,000 | 2,650 4/3 | — | Two substantial outbuildings for shop/storage; 3-car carport; 2-car attached | Needs updating. Heat pump + AC, generator, possible lower-level apartment. The floor. | Listing · Zillow · Redfin · County |
| Closest match | 18710 Vashon Hwy SW Center | Sold, recent (date unconfirmed) | $850,000 | 2,410 3/1 · 1930 | 6 | Detached garage with workshop | 1930s farmhouse, renovated kitchen, on sewer, approved CAD for ADU, R4P. | Listing · Zillow · Redfin · County |
| Closest match | 13702 SW 240th St Reddings Beach, south | Sold May 22, 2025 | $1,295,000 (last list) | 1,850 4/2 · 1973 | 11.09 | 1,050 sf shop: two cars + heated office | Fully remodeled, heat pump, ironwood decks. Small house, big shop, lots of land. | Listing · Zillow · Redfin · County |
| Closest match | 25922 99th Ave SW Dockton, Maury | Sold, recent (date unconfirmed) | $600,000 | 1,760 3/2 · 1999 | 1.5 | 30x40 heated shop, upgraded electric, EV charger, RV hookup | Manufactured home. Cheapest big shop on the island. | Listing · Zillow · Redfin · County |
| Closest match | 13808 SW 216th St Lisabeula, west | Sold Sep 28, 2026 | $715,000 (listed $800K) | 1,358 3/2 | 9.46 | Detached 2-car garage | Manufactured, new roof, rebuilt crawl space, own well. Land value. | Listing · Zillow · Redfin · County |
| Similar house, less shop | 23423 80th Ave SW Maury | Sold Oct 2, 2026 | $990,000 | 2,570 4/3 | — | Unknown | Compass listing; shop not confirmed. | Zillow · Redfin · County |
| Similar house, less shop | 11617 SW 156th St West side | Sold, recent (date unconfirmed) | $850,000 | 2,180 3/3 | 1 | 3-car garage | Pond, metal roof, daylight basement apartment. | Listing · Zillow · Redfin · County |
| Similar house, less shop | 8829 SW 198th St Center | Sold, recent (date unconfirmed) | $745,000 | 2,490 4/2 | 2 | Attached garage only | Newly remodeled, level open land. | Listing · Zillow · Redfin · County |
| Similar house, less shop | 22604 Deppman Rd SW Portage, central | Sold, recent (date unconfirmed) | $860,000 | 1,675 2/3 | — | 900 sf garage w/ powder room, sink, wood stove | Radiant floors, heat pump, mini splits, deeded beach access. | Listing · Zillow · Redfin · County |
| Similar house, less shop | 24314 75th Ave SW Maury | Sold Dec 3, 2025 | $975,000 | 1,851 3/2 | 2 | Unknown | Zillow · Redfin · County | |
| Similar house, less shop | 21926 Vashon Hwy SW Center, on the highway | Sold Dec 5, 2025 | $620,000 | 2,094 3/2 | 2 | Unknown | Zillow · Redfin · County | |
| Similar house, less shop | 16832 McIntyre Rd SW West-central | Sold Jan 2, 2026 | $1,300,000 | 2,170 4/2 | 9 | Unknown | Nine acres carrying the price. | Zillow · Redfin · County |
| Similar house, less shop | 9326 SW 216th St Center | Sold Dec 9, 2025 | $1,525,000 | 2,280 3/3 | 14 | 3-car garage + studio; woodland cottage | High finish, 14 acres. | Listing · Zillow · Redfin · County |
| Similar house, less shop | 10504 SW 216th St Morgan Hill | Sold, recent (date unconfirmed) | $1,300,000 | 1,944 2/2 | 7 | Second building: guest apartment up, guest suite + garage down; storage buildings | Paradise Hollow. Gardens, trails. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 11828 Cove Rd SW West side | Sold, recent (date unconfirmed) | $835,000 | 1,340 4/1 | 2 | Finished outbuilding w/ electric and heat; RV pad w/ hookups | Fully remodeled, mini split in every bedroom. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 22501 100th Pl SW Burton, harbor view | Sold, recent (date unconfirmed) | $950,000 | 1,690 2/2 | — | Studio/shop | View is the price. Single level + basement. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 26030 Wax Orchard Rd SW West side | Sold, recent (date unconfirmed) | $950,000 | 1,370 1/1 · 2009 | 4 | Secondary apartment | Steel-framed, radiant concrete, Innotech windows, heat pump. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 9926 SW 184th Way Near town | Sold ~Mar 2026 | $780,000 | 1,950 4/3 · 1950 | 0.31 | 667 sf finished garage/shop with windows | 2005 remodel, public water and sewer, gas. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 20403 87th Ave SW Tramp Harbor | Sold, recent (date unconfirmed) | $543,000 | 1,512 3/2 | 0.5 | 320 sf studio + second outbuilding | Manufactured. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 14634 Bethel Ln SW West side | Sold, recent (date unconfirmed) | $575,000 | 1,180 2/2 | — | ~200 sf studio | High-finish remodel, fully fenced. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 23808 71st Ave SW Maury | Sold, recent (date unconfirmed) | $550,000 | 750 1/1 | 5.2 | Outbuilding w/ 3/4 bath + laundry, greenhouse | Loft cabin, wood stove. A project. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 14274 Olympic Dr SW West side, 90 ft waterfront | Sold May 21, 2026 | $710,000 (listed $799K) | 792 1/1 | 0.73 | Bunkhouse + workshop | Septic sale inspection Jan 13 → listed March → sold May. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 20412 Chautauqua Beach Rd Ellisport | Sold, recent (date unconfirmed) | $640,000 | 870 2/1 | — | Outbuilding with power | Steps to KVI beach. | Listing · Zillow · Redfin · County |
| Smaller house with shop | 10006 SW 188th St Near town | Listed ~Mar 2026 (sold per Movoto) | Price not found | 1,410 2/1 | 0.45 | Shop + separate storage building; two unheated finished bonus rooms | Half mile to Island Center Forest. Ask Jordan for the sold price. | Listing · Zillow · Redfin · County |
| Same road | 23603 Old Mill Rd SW Old Mill Rd | Sold, recent (date unconfirmed) | $1,550,000 | 3,470 4/3 | — | Unknown | Mary Margaret's listing. Same road, bigger house. | Listing · Zillow · Redfin · County |
| Same road | 22602 Old Mill Rd SW Old Mill Rd, Misty Isle, across from county parkland | Listed Mar 20, 2026; sold | $1,600,000 (listed $1.175M) | 1,990 3/2 | 2.7 | Unknown | Design-forward remodel, bid up $425K over list. The outlier. | Listing · Zillow · Redfin · County |
| On the market now | 20825 Old Mill Rd SW Old Mill Rd | Active | Not pulled | — | — | Unknown | The direct neighbor comp. Look this one up. | Zillow · Redfin · County |
| On the market now | 16526 128th Ave SW Near Island Center Forest | Active | $900,000 | 2,700 4/3.5 | 1 | Not stated | Heat pump, primary suite, park-like acre. The house buyers compare Old Mill to this month. | Zillow · Redfin · County |
| On the market now | 22516 100th Pl SW Burton | Active | Not pulled | — | — | Large studio/shop, exposed beams | Per Redfin teaser. | Zillow · Redfin · County |
| On the market now | 28525 143rd Ave SW Tahlequah | Active | Not pulled | — | — | Detached 2-car garage, barn, garden shed, heated storage building | Acreage. Next door to the 28526 sale. | Zillow · Redfin · County |
| On the market now | 27428 97th Ave SW Maury | Active | Under $1M | 3,580 | 4.9 | Not stated | One-owner home on nearly 5 acres. | Zillow · Redfin · County |