Real Estate Marketplace Software Development Services

The whole two-sided product: listing ingestion from MLS feeds, broker uploads and owner or landlord listings; a search experience with map, draw-on-map and commute or school filters; listing pages, saved searches and alerts; lead capture and routing to the right agent or landlord; tour and viewing booking; agent, broker and landlord dashboards; moderation and fraud checks; and the billing behind your revenue model. We also design it, since most of the value is in the search and enquiry flows. On AgentScout, a US platform that matches buyers and sellers with local agents, the work ran from research and personas through a tested prototype to development.

An IDX plugin puts one MLS's listings on one brokerage's site under that brokerage's licence. A marketplace aggregates supply from many agents, brokerages or owners, often across several MLSs or markets, and makes money from both sides: buyers and renters get search, agents or landlords pay for leads, placement or subscriptions. That means its own data model, de-duplication across sources, a lead-routing engine, accounts for every role and a billing system. If you are one brokerage in one market, a good IDX product is usually the better buy, and we'll tell you so.

Only through a licence. MLS data is accessed with the agreement of each MLS, usually as an IDX or VOW feed for a participating broker, or under a separate data licence, and is commonly delivered through the RESO Web API by the MLS itself or a distributor such as MLS Grid, Bridge Interactive, Trestle or the Spark API. Display rules (broker attribution, refresh frequency, which fields may be shown, which listings are excluded) come with that licence and differ by MLS. Northell Design maps the access route and rules for each target market during discovery, and builds the ingestion layer so new MLSs can be added without changing the product.

Agent and broker subscriptions, featured or boosted listings, pay-per-lead, pay-at-closing referral fees, landlord listing fees, and transaction add-ons such as mortgage, insurance or moving partners. Each one changes the build: pay-per-lead needs lead quality scoring and dispute handling; pay-at-closing referrals usually need a licensed brokerage in each state and a way to track deals to close; partner offers can fall under RESPA Section 8 if they touch settlement services. We model the revenue flows early and recommend you confirm the licensing side with a real estate attorney.

We treat the Fair Housing Act as a design input. Search filters and listing fields avoid proxies for protected characteristics, listing text is screened for discriminatory language before it goes live, recommendation and ranking logic is reviewed for steering, and paid ad audiences are not built around protected classes. Rental marketplaces with screening add adverse-action and dispute flows under the Fair Credit Reporting Act. We document these decisions so your compliance counsel can review them.

With layered checks rather than one filter: identity and licence verification for agents and landlords, duplicate and photo-reuse detection against existing listings, price and location anomaly flags, a moderation queue for new or edited listings, in-platform messaging so contact details are not exposed to scrapers, and clear reporting tools for users. Payments such as deposits or application fees go through a provider like Stripe Connect so money only moves to verified accounts.

You do: source code, cloud accounts, your own listing and user data, and the integration credentials belong to you. MLS data remains governed by each MLS licence, so we keep it separate from your first-party data, and Northell Design documents the system so your team or another vendor can run and extend it.