Neighborhoods / Newcastle
Greater Seattle Community Guide
Newcastle
Small, quiet, and tucked between three bigger cities.
Newcastle is one of King County's smallest incorporated cities, occupying a wooded ridge between Bellevue, Renton, and Issaquah. It didn't become its own city until 1994, and it has never had a dedicated ZIP code of its own — addresses here use 98056 or 98059, shared with neighboring Renton, which makes Newcastle easy to overlook in city-level data even though it functions as its own distinct, notably affluent community.
Housing skews newer and more uniform than its older neighbors, built up mostly from the 1990s onward around the Newcastle Golf Club and the wooded terrain of Cougar Mountain's lower slopes. It's a quiet, low-turnover market with limited commercial development of its own — most daily errands happen in Bellevue, Factoria, or Renton, a few minutes in any direction.
On the map
Where Newcastle sits
Get your bearings — explore the area, then dig into commute times and the current market below.
King County context · 2026
County-level NWMLS figures for July 2026 — Newcastle has no ZIP-level report of its own since it shares postal codes with Renton. Ask us for a street-level read.
Getting around
Commute times
| Destination | Typical drive | Via |
|---|---|---|
| Bellevue (Factoria) | 8–12 min | Coal Creek Pkwy / I-405 |
| Renton | 10–15 min | I-405 |
| Issaquah | 10–15 min | I-90 |
| Downtown Seattle | 20–30 min | I-405 / I-90 |
Estimated off-peak driving times; rush hour and transit will vary.
The feel of the place
Lifestyle & vibe
Quiet and residential, with almost no commercial center of its own — most owners treat Newcastle as a wooded, golf-adjacent retreat that happens to sit within minutes of three larger job centers. Low turnover and limited new supply keep it a genuinely small market.
Before you buy
Good to know about Newcastle
The local nuances that shape day-to-day life and long-term value.
- Newcastle shares ZIP codes with Renton, so city-level or ZIP-level market data usually describes a wider area than the city itself — ask for Newcastle-specific comparables.
- Housing stock is newer on average than Bellevue or Renton, mostly built from the 1990s onward.
- Limited local commercial development means most daily errands happen in neighboring Bellevue, Factoria, or Renton.
- Cougar Mountain Regional Wildland Park and the Coal Creek corridor border the city and are a genuine lifestyle draw for buyers who want trail access without an Eastside price tag.
What buyers want to know
Living in Newcastle
Schools, healthcare, groceries, and recreation — researched for the way buyers actually decide.
🏫 Schools
- Renton School District
- Newcastle Elementary
- Hazen High School
🏥 Hospitals & Healthcare
- Overlake Medical Center
- Valley Medical Center
🛒 Groceries & Markets
- Newcastle Commons
- Factoria Mall & grocers (Bellevue)
🌳 Parks & Recreation
- Newcastle Golf Club
- Cougar Mountain Regional Wildland Park
- Coal Creek Natural Area
Your Newcastle Realtor
Newcastle real estate: buying, selling, and homes for sale
PNW Pinnacle Group, led by brokers Deepak Singh and Dr. Hind Golden of Marketplace Sotheby's International Realty, serves buyers, sellers, and investors in Newcastle and across Seattle and the Eastside. The team is backed by the Sotheby's International Realty network of 1,100 offices in 86 countries and territories.
Newcastle is one of King County's smallest and more affluent cities — under 15,000 residents, sharing ZIP codes 98056 and 98059 with neighboring Renton since it has no ZIP code of its own — served primarily by the Renton School District and sitting between Bellevue, Renton, and Issaquah.
You can search live Newcastle listings directly from this page — the search above is scoped to Newcastle and pulls current homes for sale from the Sotheby's International Realty network. For listings that haven't hit the market yet, or for help judging whether a specific home is priced correctly, contact the team directly.
Buying a home in Newcastle starts with understanding your actual negotiating position, which changes month to month and street to street. PNW Pinnacle Group tracks NWMLS showings and inventory data for Newcastle and the surrounding markets, so offers are structured around current conditions rather than last year's assumptions.
Selling a home in Newcastle comes down to pricing to today's comparable sales, preparing only the improvements that return their cost, and marketing through a network that reaches qualified buyers. The team provides a pricing analysis and an itemized net-proceeds estimate — including Washington's real estate excise tax — with no obligation to list.
No — Newcastle shares ZIP codes 98056 and 98059 with neighboring Renton, which can make it easy to overlook in city-level data even though it's its own incorporated city with a distinct, more affluent character. Confirm you're looking at Newcastle-specific listings rather than broader Renton-ZIP data when comparing prices.
Considering Newcastle?
Let's find your place here.
Search active listings or book a strategy session to talk through Newcastle specifically.
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