What is the difference between IDX and MLS?

An MLS (multiple listing service) is the database where member brokers share listings. IDX is the policy and data arrangement that lets a broker display other members' listings on their own website. You join the MLS through your brokerage, then sign an IDX agreement and use an approved provider to get the listing feed onto your site.

Do I need IDX if I only sell my own listings?

Not necessarily. If you only want to show your own listings, you can add them as CMS pages yourself, which gives you full design control and indexable pages. IDX becomes worth it when you want buyers to search the whole market on your site, so they stay with you instead of going to a portal.

How much do IDX providers charge?

IDX providers usually charge a recurring monthly or annual fee, and some charge setup fees or more for API access. Your MLS may also charge for IDX data. Prices vary by provider, MLS and feature set, so check current pricing pages and ask about API access before you choose a platform or design approach.

Is a mortgage calculator worth adding to a real estate website?

It can help buyers early in their search, but it rarely produces leads on its own, and many portals already offer one. Add it to listing pages if your IDX provider includes it, and avoid building a custom one unless you work with a lender partner who wants the leads. Local content usually earns more attention.

Should listing pages include a map?

Yes, a map is one of the first things buyers look for on a listing. Use a lightweight embed that loads only when needed, so it doesn't slow the page, and check your MLS rules on how exact addresses can be shown. Add nearby schools, transit or amenities when your data source supports it and the information is accurate.

All posts

Industries

Real Estate Website Must-Have Features: IDX, Search, Lead Capture

Real estate website features checklist: IDX and MLS rules, framed vs API listings for SEO, IDX options on Webflow and Framer, lead capture and launch priorities.

By Mehdi HassanOct 29, 20268 min read

The short answer

The essential real estate website features are an IDX listing search that follows your MLS rules, indexable neighborhood and listing pages on your own domain, a seller lead path such as a valuation request, agent profiles, required broker and fair housing disclosures, and fast mobile pages. How you connect IDX decides how much search traffic you keep.

Key takeaways

IDX gets MLS listings onto your site; how it's delivered (framed or API) decides who gets the SEO credit.
Webflow and Framer have no native IDX. You embed a vendor widget, use a subdomain or sync a feed.
Neighborhood pages often do more for organic search than the listing search itself.
Don't force registration before buyers can see a listing. Gate saved searches and alerts instead.
Disclosures, MLS attribution and accessibility belong on the launch checklist, not the backlog.

Part of Real Estate Website Design: The Guide for Brokerages, Developers and Proptech

What features does a real estate website need?

A real estate website needs listing search, local content, lead capture, agent information, compliance disclosures and fast mobile performance. Those six cover what buyers, sellers and regulators expect. Everything else, from mortgage calculators to virtual tours, is useful only once those are in place.

This checklist is for agents, teams and brokerages. Developers selling a single project need a different set, covered in our guide to the real estate development website. For how features fit into the wider site strategy, see our real estate website design guide.

IDX listing search with filters that match your market: area, school district, price, property type, beds and baths.
Listing detail pages with photos, key facts, map, required MLS attribution and one clear contact or tour action.
Neighborhood and area pages written with real local detail, linked to filtered searches.
Seller lead path: a valuation request or listing consultation booking.
Agent profiles for teams and brokerages, with areas served and direct contact.
Saved searches and alerts for registered users.
Disclosures: brokerage name and license details, fair housing notice, MLS disclaimers, privacy policy.
Accessibility and speed: keyboard-usable search, readable contrast, compressed images, fast mobile load.
Lead routing and tracking: forms that reach the right agent quickly, with source tracking.

How does IDX integration work on a real estate website?

IDX integration works by pulling listing data from your MLS through an approved IDX provider, then displaying it on your site under that MLS's rules. IDX (Internet Data Exchange) is the arrangement that lets participating brokers show each other's listings, and your broker typically has to sign an IDX agreement with the MLS before a provider can turn the feed on.

Providers deliver the data in different ways. Some give you hosted search pages or embeddable widgets. Others give you an API or data feed, often based on the RESO Web API standard, which a developer can use to build listing pages on your own domain. The delivery method is the most important technical decision on a real estate website, because it decides what search engines see.

MLS display rules you'll usually need to follow

Each MLS sets its own IDX rules, so check your MLS's current policy, but the same themes come up again and again. Listing pages usually need to show the listing brokerage, and sometimes the listing agent, near the listing. Most MLSs require a disclaimer about data accuracy and the source, plus the date the data was last updated.

There are usually limits on which fields can be shown publicly, rules about how quickly sold or withdrawn listings must be removed, and restrictions on modifying listing content. Some MLSs also require their logo or an IDX icon. A good IDX provider handles most of this in its templates, but if you build custom listing pages, your developer has to implement each rule.

Framed IDX vs API IDX: which is better for SEO?

API-based IDX is better for SEO because the listing pages live on your domain as normal, indexable pages. Framed or iframe IDX is faster and cheaper to install, but the content usually belongs to the vendor's domain or isn't indexed as part of your site, so your pages get little search credit for the listings shown on them.

Approach	SEO value	Effort and cost	Best for
Iframe or framed widget	Low: content not on your pages	Lowest	New agents, brand-first sites
Hosted IDX on a subdomain	Some, but split from your main domain	Low to medium	Agents wanting full search quickly
Plugin-based IDX (WordPress)	Medium to high, depends on plugin	Medium	WordPress sites
API feed into custom pages	High: pages on your domain	Highest	Brokerages competing on search

Indexable listing pages aren't automatically a win. Thousands of listings appear on portals with far more authority, so your copies rarely outrank them. Where you can win is the long tail of local intent: neighborhood pages, building pages, school-area searches and featured listings with original writing. That's why many brokerages use a hosted IDX for browsing and put their SEO effort into area pages.

Can you add IDX to a Webflow or Framer website?

Yes, but neither Webflow nor Framer has native IDX, so you add it through a provider. The common routes are an embedded search widget, a hosted search on a subdomain, or a custom sync that pushes listing data from an API into the CMS. Each trades setup effort against SEO value and design control.

Embed a widget. Most IDX providers offer script or iframe embeds. Fastest to set up, limited styling, low SEO value.
Link to a hosted search. Put full search on a subdomain run by the provider and keep the main site for brand and area pages.
Sync a feed into the CMS. A small service pulls listings from the provider's API and writes them as CMS items. You get styled, indexable pages, but CMS item limits, sync reliability and MLS removal rules need care.
Go hybrid with Next.js. Keep marketing pages in a CMS and build listing pages in code against the API. Most control, most build effort.

If your current site is a one-page builder you've outgrown, our guide to upgrading from Carrd or Notion to a real website covers when the move is worth it. If you're moving off an old WordPress IDX setup, our website migration SEO checklist covers redirects for old listing and area URLs.

Which lead capture features belong on a realtor website?

A realtor website needs lead capture that gives something real in exchange: a tour booking, a valuation consultation, saved searches or listing alerts. Visitors share details when the value is obvious and the timing makes sense, not when a pop-up blocks the page.

Tour or showing request on every listing, with time preferences.
Valuation request for sellers, framed as a consultation with a named agent.
Saved searches and new-listing alerts, which justify registration.
Area guide or market report downloads for people early in their search.
Click-to-call and text on mobile, tracked as conversions.

What else belongs on a realtor website checklist?

Beyond search and lead capture, a realtor website checklist should cover local content, trust signals, compliance and measurement. These are the features that separate your site from the portals and protect you from avoidable problems.

Neighborhood pages with original writing, photos you own and links to filtered searches.
Recent sales or testimonials, shown within your MLS and brokerage rules and with client permission.
Brokerage and license disclosures in the footer and on agent pages, per your state's requirements.
Fair housing language reviewed in all neighborhood and listing copy.
An accessible search experience: labeled filters, keyboard support and readable contrast.
Analytics and call tracking so you know which pages produce leads.

To see how leading brokerages and portals handle these, browse our real estate website examples. For campaign pages such as a single-property site or an open-house sign-up, use our real estate landing page templates.

How do you prioritize real estate website features for launch?

Prioritize the features that produce leads and keep you compliant, launch with those, and add the rest once you can see what visitors use. A smaller site that works beats a feature-heavy one stuck in development.

Confirm your IDX agreement and provider
Check MLS approval, the provider's delivery options and its compatibility with your platform before designing anything.
Choose the listings approach
Widget, subdomain, CMS sync or custom pages, based on how much you plan to compete in search.
Write your top area pages
Start with the five to ten neighborhoods you sell most. These carry your local search and your expertise.
Build the seller path
One valuation or listing consultation page with a short form and a named agent.
Add disclosures and accessibility checks
Review license details, fair housing language and keyboard access before launch.
Launch, then add features by evidence
Add alerts, calculators or tours once analytics show where visitors drop off.

For budgeting, including recurring IDX and MLS fees, see our real estate website cost guide.

Frequently asked questions

What is the difference between IDX and MLS?: An MLS (multiple listing service) is the database where member brokers share listings. IDX is the policy and data arrangement that lets a broker display other members' listings on their own website. You join the MLS through your brokerage, then sign an IDX agreement and use an approved provider to get the listing feed onto your site.
Do I need IDX if I only sell my own listings?: Not necessarily. If you only want to show your own listings, you can add them as CMS pages yourself, which gives you full design control and indexable pages. IDX becomes worth it when you want buyers to search the whole market on your site, so they stay with you instead of going to a portal.
How much do IDX providers charge?: IDX providers usually charge a recurring monthly or annual fee, and some charge setup fees or more for API access. Your MLS may also charge for IDX data. Prices vary by provider, MLS and feature set, so check current pricing pages and ask about API access before you choose a platform or design approach.
Is a mortgage calculator worth adding to a real estate website?: It can help buyers early in their search, but it rarely produces leads on its own, and many portals already offer one. Add it to listing pages if your IDX provider includes it, and avoid building a custom one unless you work with a lender partner who wants the leads. Local content usually earns more attention.
Should listing pages include a map?: Yes, a map is one of the first things buyers look for on a listing. Use a lightweight embed that loads only when needed, so it doesn't slow the page, and check your MLS rules on how exact addresses can be shown. Add nearby schools, transit or amenities when your data source supports it and the information is accurate.

Mehdi Hassan · CEO & Design Director

Copywriter, designer and developer, and founder of Designify Studio. Over five years, 60+ projects across 14+ industries, for startups that have raised $300M+.

Want this done for you? Website, $8,000.

A multi-page marketing site, written and designed by us, developed in Next.js and animated. $8,000, one-time, up to 6 pages. Book a free 30-minute call to see if it fits.

Schedule Call