Chase Costello

Chase Costello
Real Estate Agent (Broker)
Sammamish WA

Broker (WA: 109015)

REALTOR® 2 Active Listings Serves King County, WA
View on Realtor.com

Contact Information

Brokerage
Real Broker Llc

Office Website
Office Address
1605 228th Pl Se
Sammamish, WA  98075
(King County)
Office Phone
360-790-1848
Office Fax
731-561-3650
Mobile
206-999-4420
Email
chase@costelloteam.com

Service Areas

Beaux Arts: WA Hunts Point: WA Bellevue: WA Yarrow Point: WA Beaux Arts Village: WA Clyde Hill: WA East Renton Highlands: WA Hobart: WA Issaquah: WA Mirrormont: WA Sammamish: WA Shadow Lake: WA Covington: WA Maple Valley: WA Ravensdale: WA Mercer Island: WA Riverbend: WA Wilderness Rim: WA North Bend: WA Tanner: WA Snoqualmie: WA Redmond: WA Union Hill-Novelty Hill: WA Ames Lake: WA Newcastle: WA Renton: WA

About Chase Costello

The Costello Team is dedicated to delivering exceptional customer service and expert guidance, empowering clients to make well-informed decisions throughout the buying and selling journey.

Chase Costello, the Broker and Team Lead, embarked on his real estate career in 2002 and brings over two decades of expertise in sales, negotiation, marketing, and business development to the table.

The team comprises adept communicators focused on client needs, as evidenced by numerous positive reviews. They take pride in their enthusiastic and energetic approach, coupled with strong negotiation skills, all while maintaining a commitment to client satisfaction. With extensive experience and in-depth knowledge of local neighborhoods, the process of buying or selling a home can be seamless.

For buyers, navigating today’s competitive market can be daunting, with fluctuating home prices, interest rates, and multiple offers to consider. The Costello Team is equipped to educate clients on how to effectively prepare for the buying process and craft compelling offers.

For sellers, the current market presents an opportune moment to sell. The team is committed to helping clients achieve the best possible sales price by accurately pricing homes, negotiating offers, and guiding them in selecting the most suitable offer. Engaging with an inexperienced Realtor can lead to unnecessary risks and costs.

In real estate, a collaborative team consistently outperforms individual efforts, underscoring the importance of choosing the right professionals to work with.

King County, WA Real Estate Market Analysis (Single Family Homes)

$1,681,188
Avg. Listing Price
From Chase's portfolio
3.8 / 3.0
Avg. Beds/Baths
Typical property size
2,703 sf
Avg. Square Footage
Interior living space
5370
Active Listings
Current inventory

If you need to reach working real estate agents in King County, Washington, this list was built for you. Mortgage lenders, title companies, PropTech platforms, insurance providers, continuing education companies, and recruiters all rely on verified agent contact data to drive outreach campaigns that actually convert. Whether you're launching a new product, filling a pipeline, or growing a brokerage, the right contact list is the foundation of everything.

This King County agent list gives you direct access to {{AGENT_COUNT}} actively licensed real estate professionals with verified email addresses, plus {{CELL_COUNT}} agents who also have cell phone numbers on file. Use it for cold email sequences through platforms like Zap Contact (zapcontact.com) or other cold-email tools, for direct mail drops, for SMS outreach, or to fuel LinkedIn audience matching. No gatekeepers, no guessing — just verified contacts ready to work.

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Our data is sourced directly from Washington State licensing board records, so every contact reflects an agent who holds an active license — not someone who let their credentials lapse three years ago. New emails are added weekly, the full list is cleaned monthly, and we perform a complete database refresh every six months. That discipline is why we can back every list with a 96% deliverability guarantee, something the cheap data vendors pushing outdated CSVs simply cannot offer.

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The most immediate use is cold email outreach. Load the list into a platform like Zap Contact (zapcontact.com), build a short sequence, and you are in front of hundreds of active agents within hours. For higher-touch campaigns, combine email with direct mail to the same contacts for a multichannel approach that dramatically increases response rates. If you have cell numbers, layering in SMS or ringless voicemail can push conversion even further.

Segmenting by broker versus sales agent is a smart move if your offer differs for team leaders versus individual producers. You can also filter by city or zip code within King County to tighten your targeting for local events, geographic promotions, or territory-based sales teams.

Why King County, Washington Agent Data Matters

King County is home to Seattle, Bellevue, Redmond, Kirkland, Renton, and dozens of other active real estate markets that together represent one of the most productive agent communities in the Pacific Northwest. With {{AGENT_COUNT}} licensed agents operating across this county, a targeted list here puts your message in front of a dense, high-activity professional audience. Sending a statewide blast means your offer gets diluted across rural markets that may have no relevance to your business — local targeting changes that entirely.

We are the only vendor that delivers King County agent data segmented down to the zip code level, giving you surgical precision no other source can match. Whether you need agents in a single neighborhood or every zip in the county, the data is ready to deploy exactly how your campaign requires it.

Current Property Listings

As of 6/15/2026, Chase Costello has 2 properties for sale in Sammamish and surrounding areas.

$529,000

Listed 2026-04-24

3770 Suncadia Trl Unit 102
Cle Elum, WA  98922

Beds: 2.0
Baths: 2.0
Sq Ft: 1,290
Condo Map
View Full Details

$1,125,708

Listed 2026-05-20

964 7th Ave NE Unit 24
Issaquah, WA  98029

Beds: 4.0
Baths: 3.5
Sq Ft: 2,191
View Full Details

Current Property Rentals

Chase Costello currently has no rental properties available in Sammamish and surrounding areas. Check back later.