IDX Integration for California Regional MLS (CRMLS)

About California Regional MLS

California Regional MLS (CRMLS) is the largest multiple listing service in the United States, and for most agents south of the Tehachapis it is simply where the inventory lives. Brokers from Long Beach to Palm Springs price, list, and research property through CRMLS every day, which is why a California Regional MLS IDX feed sits behind so many agent websites in Southern California. Get the feed right and your site shows the same listings your clients are texting you about, updated straight from the source.

The organization goes back further than the name. Multi-Regional Multiple Listing Service (MRMLS) was founded in Pomona in 1979 and spent three decades serving the San Gabriel Valley and Inland Empire boards. In 2010 it merged with calREDD, the California Association of REALTORS listing platform, and took the California Regional MLS name to match its growing footprint. The defining move came in 2011, when CRMLS merged with SoCalMLS, the Orange County system, a combination that created the largest MLS in the nation. CRMLS operates from San Dimas and has pursued a statewide MLS vision ever since.

Reach extends well past its own membership. CRMLS maintains data-share agreements with neighboring systems, so subscribers search listings from markets CRMLS does not directly serve, and it distributes vendor feeds through the RESO Web API under formal data licensing agreements. Agents, brokers, and appraisers across dozens of member associations rely on it, from beach cities to desert resort towns. For a website owner the practical upshot is one feed covering an enormous share of Southern California inventory, with far fewer coverage gaps to explain to clients.

Coverage area

CRMLS serves agents and brokers across:

• California - the dominant MLS across Southern California, with member associations reaching into the Central Valley and Central Coast

Recognizable markets inside the CRMLS footprint include:

• Los Angeles County communities such as Long Beach, Pasadena, and the San Gabriel Valley
• The San Fernando and Santa Clarita Valleys, served through the affiliated CRISNet system
• Orange County, the legacy SoCalMLS territory: Anaheim, Irvine, Huntington Beach, Newport Beach, and Costa Mesa
• The Inland Empire, including Riverside, Corona, Ontario, Rancho Cucamonga, and Temecula
• The Coachella Valley: Palm Springs, Palm Desert, and La Quinta

Some major California markets run on separate systems (San Diego, Silicon Valley, and Sacramento among them), and CRMLS data shares mean many of those listings still reach CRMLS subscribers. If your farm area is anywhere in the greater Los Angeles, Orange County, or Inland Empire region, CRMLS is almost certainly your MLS. If you are not sure which system your board runs on, a two-minute call to your association settles it and saves you from provisioning the wrong feed.

How to get California Regional MLS listings on your website

CRMLS is unusually open about its IDX program. Its rules and vendor lists are published for anyone to read, part of what it calls the IDX Transparency Initiative. The practical path looks like this:

1. Sign the CRMLS IDX agreement. Every participant or subscriber displaying CRMLS listings on a website needs a signed IDX agreement in place first. Your broker participates in this step, since IDX rights flow through the brokerage.
2. Pick how the data reaches your site. Most agents use an approved IDX vendor that already holds a CRMLS data license. CloseDaily carries that license and handles the vendor-side paperwork.
3. Complete data licensing and provisioning. Vendor-hosted setups move quickly because CloseDaily already holds the CRMLS data relationship. We request the feed once your IDX agreement is in place.
4. Launch search under your domain. Your provider handles field mapping, required attribution, and CRMLS display rules, then turns on search, listing pages, and alerts.

Direct-feed setups put compliance with CRMLS Rules and Regulations on you. A vendor-hosted feed keeps that responsibility with the vendor, which is the sensible default for most agents.

CloseDaily and California Regional MLS

CloseDaily supports IDX integration for California Regional MLS. Your site runs map search, listing detail pages, and saved-search alerts on CRMLS data, with every lead flowing into the built-in CRM for follow-up. In a market this size, speed decides who wins the client: a Corona buyer browsing at midnight expects a response before breakfast, and automated follow-up is how solo agents keep pace with the mega-teams.

Onboarding covers the full setup and typically takes a few business days once your CRMLS IDX agreement is approved. Pricing starts at $299 per month. A 7-day free trial is available, and a credit card is required to start it.

Start your 7-day free trial or Book a demo to see CRMLS home search on your own domain.

Related MLS coverage

• CRISNet MLS - California
• California Real Estate Technology Services - California
• MLSListings Inc. - California
• MetroList - California
• San Diego Multiple Listing Service - California