Short answer: An IDX (Internet Data Exchange) website pulls live listing data from your local MLS and displays it on your own domain, so buyers search *your* site instead of Zillow. A basic IDX website costs $500–$1,000; a custom one that actually converts costs $3,000–$9,000 plus a monthly IDX feed fee of roughly $25–$60. Whether it generates leads comes down to search UX, page speed, lead-capture rules, and local SEO — not the feed itself.
IDX vs MLS
- MLS (Multiple Listing Service): the regional database agents use to share listings.
- IDX: the agreement and technology that lets you display MLS listings on a public website.
- VOW: a login-gated version with more data. Most agent sites use IDX, not VOW.
You need to be an MLS member (or partnered with one) and sign an IDX agreement. A provider like IDX Broker, iHomefinder, or a RESO Web API integration then feeds listings to your site.
What an IDX website costs in 2026
| Setup | One-time | Monthly feed |
|---|---|---|
| Plugin on a template | $500–$1,000 | $25–$60 |
| Semi-custom search + branding | $2,000–$4,000 | $25–$60 |
| Custom map search, saved searches, multi-feed | $4,000–$9,000 | $50–$100 |
| Portal / multi-office / multi-country | $9,000+ | varies |
Platform bundles (kvCORE, Real Geeks, Sierra) roll the IDX into a $300–$500/mo subscription — convenient, but you rent it and the design is shared with thousands of agents.
For a fuller cost picture see Real Estate Website Cost in 2026.
Why most IDX sites don't generate leads
Industry coverage is blunt about it: the large majority of template IDX sites produce few or no leads. The feed works; the setup around it doesn't. The usual failures:
- Slow listing pages. IDX results and detail pages are image-heavy. If they load in five seconds, the visitor is gone.
- Clunky search. No map draw, weak filters, results that reload the whole page.
- No reason to register. Forced registration too early kills trust; no registration prompt at all means no lead.
- Leads go nowhere. No CRM routing, no instant notification, no follow-up.
- No SEO around the listings. Neighbourhood guides, school pages and market updates are what rank — bare IDX results don't.
How to set up IDX so it converts
- Speed first. Listing and detail pages under two seconds. Lazy-load galleries, cache aggressively.
- Map-based search with draw-a-boundary, saved searches and email alerts.
- Progressive registration. Let people browse; ask for details after a few detail-page views or when they save a search.
- Instant lead routing to your CRM (Follow Up Boss, kvCORE, HubSpot) with a mobile notification.
- Content around the listings. Neighbourhood pages, "homes under $X in [area]", market reports — this is your organic channel.
- Schema markup on listing pages so they're eligible for rich results.
Key takeaways
- IDX shows live MLS listings on your own domain; you need MLS membership and an IDX agreement.
- Basic IDX site: $500–$1,000 + ~$25–$60/mo feed. Custom that converts: $3,000–$9,000.
- The feed isn't the problem — slow pages, weak search, no CRM routing, and no surrounding SEO are.
- Fix speed, add map search and progressive registration, route leads instantly, and build content around the listings.
FAQ
Do I need to be an MLS member for IDX?
Which IDX provider is best?
Can an IDX site rank against Zillow?
Why does my IDX site get traffic but no leads?
Alamin Sultan
Web developer for real estate and e‑commerce. WordPress · Next.js · MERN.