About Northwest MLS
Northwest MLS (NWMLS) is the odd one out among big American MLSs, and Washington agents tend to like it that way. It is owned by its member brokers rather than a REALTOR association, an independence it has kept since 1984. For your website, NWMLS IDX access works much like anywhere else, with paperwork that runs through your broker and a feed that covers most of Washington state.
The NWMLS story in brief:
- Formed in 1984 as the Puget Sound Multiple Listing Association, a merger of four broker cooperatives: Eastside Brokers Association, North End Brokers Association, South West Multiple Listing Service, and Real Estate Multiple Inc.
- Renamed Northwest Multiple Listing Service in 1996 as coverage spread beyond Puget Sound
- Broker-owned and independent from day one, while most MLSs nationwide are association-owned
- Headquartered in Kirkland, Washington
- Serves brokers across 26 Washington counties
- Marked its 40th anniversary in 2024
That broker ownership shows up in practice. NWMLS sets its own rules, publishes them plainly, and answers to its brokers rather than to a parent association.
Coverage area
Northwest MLS serves agents and brokers across:
- Washington - most of the state, centered on the Puget Sound region
Markets inside the footprint:
- King County: Seattle, Bellevue, Kirkland, Redmond, and the Eastside tech corridor
- Snohomish County: Everett, Lynnwood, and Marysville
- Pierce County: Tacoma, Puyallup, and Gig Harbor
- Kitsap County: Bremerton, Silverdale, and Bainbridge Island
- Thurston County: Olympia and Lacey
- North Sound: Skagit, Whatcom (Bellingham), and Island counties
- Central and coastal counties reaching well beyond the Sound
Two notable exceptions: Spokane and much of eastern Washington run on their own system, and some southwest Washington markets near Portland list through Oregon's RMLS. Both are covered on separate pages here.
How to get Northwest MLS listings on your website
NWMLS manages IDX access directly, and the process is documented and predictable:
- Be an active NWMLS member broker or a broker's licensee. IDX rights attach to the brokerage, so your access rides on your broker of record.
- Request and sign the IDX agreement. Request the IDX agreement through the NWMLS website. Your broker of record signs it, and the agreement lists the specific website URLs that will display listings.
- Wait out processing. NWMLS takes roughly two weeks to process applications and often asks follow-up questions about how the data will be used. Answer quickly and the clock keeps moving.
- Launch with your provider. Once credentials are issued, your IDX provider maps the feed, applies NWMLS display rules, and turns on search, listing pages, and alerts.
The URL listing requirement matters: if you launch a second site later, it needs to be added to the agreement. Plan your domains before you file rather than amending after.
CloseDaily and Northwest MLS
CloseDaily supports IDX integration for Northwest MLS. Your site carries NWMLS-fed map search, listing detail pages, and saved-search alerts, and the CRM behind it captures every inquiry with follow-up already scheduled.
Seattle buyers are some of the most research-heavy in the country, comparing commute times and school data long before calling anyone. A complete, fast NWMLS search on your own domain keeps that research happening on your site instead of a portal's.
Plans start at $299 per month, and the 7-day free trial requires a credit card. Onboarding handles the feed work, typically a few business days after NWMLS issues credentials.
Start your 7-day free trial or Book a demo to run NWMLS home search on your own site.
Frequently asked questions
Does CloseDaily support Northwest MLS IDX?
Yes. CloseDaily supports IDX integration for Northwest MLS across its Washington footprint. We handle feed provisioning and launch during onboarding once your NWMLS IDX agreement and credentials are in place.
How do I add Northwest MLS home search to my website?
Request the IDX agreement from NWMLS, have your broker of record sign it with your website URL listed, and wait for processing, which runs about two weeks. After credentials arrive, CloseDaily builds and launches the search experience during onboarding.
What areas does Northwest MLS cover?
NWMLS covers 26 Washington counties, including the entire Puget Sound region: Seattle and King County, Snohomish, Pierce, Kitsap, Thurston, Skagit, Whatcom, and Island counties among them. Spokane and some markets near the Oregon border use different systems.
How long does Northwest MLS IDX setup take?
Budget about two weeks for NWMLS application processing, plus time for any follow-up questions they send. On our end, the feed goes live during onboarding, a few business days of work after NWMLS hands over credentials.
Is Northwest MLS part of a REALTOR association?
No, and that is its defining trait. NWMLS has been broker-owned and independent since 1984, while most MLSs are owned by REALTOR associations. Membership and rules run through the brokerage rather than an association.
Why does the NWMLS IDX agreement list specific website URLs?
NWMLS authorizes IDX display per URL, so the agreement names every site that will show listings. Adding a new site later means updating the agreement, which is why it pays to list all planned domains up front.
Related MLS coverage
- Spokane MLS - Washington
- Regional Multiple Listing Service - Oregon
- North Central Washington MLS - Washington
- Olympic MLS - Washington
- Yakima AOR MLS - Washington
Northwest MLS is a trademark of its respective owner. CloseDaily is an independent IDX and CRM provider. CloseDaily is not affiliated with, endorsed by, or sponsored by Northwest MLS or its parent organization.