US Real Estate Technology
Real Estate Portal Development for the US Market
We build custom real estate portals — MLS and IDX-integrated search, agent accounts, and lead routing — for US startups, brokerages, and PropTech companies. 16+ years, 1600+ projects delivered, with 4+ hours of daily overlap with US Eastern time.
16+ Years • 1600+ Projects • 30+ In-House Team • ADA-Conscious • Fixed Pricing
Know What You’re Building
Real Estate Portal or Brokerage Website? They’re Not the Same Build
Most inquiries we get start with “I want a real estate portal” — and about half of them actually need a brokerage website. They’re very different products with very different MLS obligations, and confusing them is the most expensive mistake you can make early on.
A Real Estate Portal
A marketplace. Listings from many brokerages or owners in one place, consumers search across all of them, and you monetize through leads, advertising, or subscriptions. Think Zillow, Realtor.com, Redfin. The hard parts are data access, search performance at scale, and MLS display compliance.
A Brokerage Website
Showcases one brokerage’s listings plus IDX inventory from the wider MLS. It syncs from your MLS feed and converts visitors into showing requests and CMA leads. The hard parts are IDX setup, display rules, and CRM lead routing.
A Rental or Management Platform
Different again — leases, rent collection, maintenance requests, and owner reporting rather than public search. Often the right answer when the business manages property rather than advertising it.
Not certain which one you need? That’s normal. Tell us what you’re trying to achieve commercially and we’ll tell you which build actually gets you there — before you spend anything. Book a free 30-minute scoping call →
The Question That Decides Everything
How Will You Get MLS Listing Data?
In the US, listing data comes through the MLS system, and access is governed by rules rather than commercial negotiation. Getting this wrong means a portal that either launches empty or gets its feed pulled. There are four routes, and most successful portals combine more than one.
IDX feeds
The standard route for brokerages and agents. Requires MLS membership and an IDX agreement, and each MLS sets its own display rules — what you must show, what you cannot cache, and how often you refresh. We build to those rules so your feed does not get pulled after launch.
RESO Web API
The modern standard replacing RETS — cleaner data, better performance, and what any new build should target. Most MLSs have migrated or are migrating, and the specification is published by RESO. Building on RESO now saves an expensive rewrite in two years.
MLS Grid and aggregators
One integration covering many MLSs, with normalized data and a single agreement — MLS Grid is the most widely used. Far faster to launch across multiple markets than negotiating each MLS separately — usually the right first move for a multi-market portal.
Direct and off-MLS listings
FSBO, new construction, rentals, and off-market inventory you source yourself — a self-serve listing flow with verification and moderation. Different product problem, but data you own outright and can differentiate on.
We’ll map your data strategy and MLS obligations before we write a line of code. A portal with beautiful search and no listings — or one that loses its feed for a compliance breach — is the most common way this project fails.
What We Build
What Goes Into a US Real Estate Portal
Six systems that have to work together. Each one is where a portal either scales or stalls.
MLS & IDX Integration
RESO Web API and RETS ingestion, scheduled refreshes within each MLS’s required window, error handling, and de-duplication across overlapping MLSs.
Search That Stays Fast
ZIP, radius, price, beds, school district, and property-type filters with map and draw-a-boundary search — built on Elasticsearch so results stay instant at 500,000+ listings, not just at launch.
Agent & Broker Accounts
Self-serve dashboards for managing listings, office and team hierarchies for multi-market brokerages, lead inboxes, and performance stats agents will actually log in to see.
Lead Capture & Routing
Showing requests, CMA and home-valuation leads routed to the right agent or team, with CRM sync (Follow Up Boss, kvCORE, Salesforce) and attribution that proves ROI at renewal time.
Monetization
Zip-code lead exclusivity, featured and premium placement, subscription tiers, and pay-per-lead billing with Stripe — including the reporting your agents will ask for.
Admin & Compliance Tools
Listing approval queues, agent onboarding, content moderation, and MLS compliance logging — the tools that get scoped last and matter most once you’re live.
Compliance
Built for US Compliance From Day One
MLS & IDX Display Rules
Every MLS sets its own rules: required attribution, what you may cache and for how long, refresh frequency, and which fields you can show. We build to your MLS’s ruleset so your feed stays live.
Fair Housing
Fair Housing rules shape what your search filters, recommendations, and ad targeting are allowed to do. We flag the patterns that create exposure — demographic proxies in filters, steering in recommendations — before they ship.
ADA Accessibility
Real estate sites are a frequent ADA lawsuit target, and settlements routinely cost more than building it right. We build to WCAG 2.1 AA — which also makes the site work better for everyone.
How We Work
How We Keep Projects On Track
Offshore rates with onshore process discipline. Here’s exactly what working with us looks like.
Free scoping session
A 30-minute call to map your features, pressure-test your listing supply plan, and give you an honest timeline and fixed cost — useful even if you build elsewhere.
Fixed price, milestone payments
You know the total before we start and pay as milestones land. No hourly billing, no moving numbers mid-project.
Weekly working demos
Every week you see the product running, not a status report. Corrections happen early, not at handover.
Real US-hours overlap
Our day overlaps 4+ hours with US Eastern time, and we staff later coverage on active projects. Questions asked in your morning get answered the same day — not tomorrow.
You own everything
Source code, documentation, and infrastructure access are yours from day one. No lock-in, ever.
Transparent Scoping
What Drives the Cost of a Real Estate Portal
Every portal is quoted differently, and any figure quoted before someone understands your requirements is a guess. What we can do is be transparent about what actually moves the number — so you know what you’re deciding.
Scope of search
A ZIP-and-price filter is straightforward. Map search, draw-a-boundary, school-district and commute-time filters, and saved-search alerts each add real engineering — and each changes how the data layer has to be built.
Number of MLS integrations
One MLS on RESO Web API is quick. Five MLSs with different rulesets, field mappings, and legacy RETS feeds is where portal budgets quietly grow — and why aggregators are often worth their fee.
Monetization complexity
Free listings cost nothing to build. Lead exclusivity by ZIP, featured placement, subscription tiers, pay-per-lead billing, proration, and invoicing are effectively a second product inside the first.
Scale from day one
A single-market portal and a 20-market national portal need different search infrastructure. Building for the wrong one is expensive either way — we’ll ask before we architect.
Admin and compliance depth
Approval queues, agent onboarding, and MLS compliance logging get scoped last and used most. Skimping here is the most common regret we see — and the fastest way to a feed violation.
What you’ll get from us
Send us your feature list and within 48 hours you’ll have a fixed quote with the breakdown behind it — hours, roles, and what each feature contributes.
Answers
Real Estate Portal Development FAQs
It depends mainly on your search complexity, how many MLS integrations you need, and whether you’re monetizing through lead sales or subscriptions from day one. Rather than quote a range that could be off by a factor of five, we give you a fixed quote within 48 hours of seeing your feature list — with the breakdown of what drives it, so you can adjust scope if you want to.
An MVP with one MLS integration takes 10–14 weeks; a multi-market platform 4–7 months. You see a working demo every week from week two.
Yes — RESO Web API, legacy RETS, and aggregators such as MLS Grid, plus CRM sync with Follow Up Boss, kvCORE, and Salesforce. We handle field mapping, refresh scheduling, and each MLS’s display requirements.
A portal aggregates listings from many sources and monetizes through leads or advertising. A brokerage website showcases one brokerage’s listings plus IDX inventory and converts visitors into showings and CMA requests. Different products, different MLS obligations, different budgets.
RESO Web API is the modern MLS data standard replacing RETS. If you’re building new, target RESO — it is cleaner, faster, and increasingly the only option as MLSs retire RETS. Building on legacy RETS today usually means paying for a rewrite within a couple of years.
Yes. We audit the existing codebase and MLS integration for free, and give you an honest fix-versus-rebuild recommendation with real numbers before you commit to anything.
Yes. We flag Fair Housing exposure in search filters and recommendation logic before it ships, and build to WCAG 2.1 AA for ADA accessibility — a frequent source of demand letters against real estate sites.
Most of our clients are in the US. We’re based in Jodhpur, India, with 4+ hours of daily overlap with US Eastern time and later coverage on active projects. We work over Slack, Zoom, and shared boards, with weekly demos.
Planning a Real Estate Portal? Start With a Free Scoping Call
Tell us what you’re building. In 30 minutes we’ll map the features, pressure-test your MLS data strategy, and give you an honest cost and timeline — whether or not you work with us.