How Much Does It Cost to Build a Real Estate Platform?

The listings themselves are cheap. What spreads a quote across the €6,500–22,000 band is everything that wraps around them:

• Search and filter performance. A simple keyword box is trivial. Geolocation search, combined price-range + property-type + bedroom filters, and viewport-based map loading that stays fast at thousands of listings is where the hours go. This is the single biggest line item on most real estate builds.
• Media volume. Twenty listings with five photos each is nothing. A few hundred listings with bulk uploads, automatic optimisation, and gallery management is a real subsystem.
• The agent portal. A public-facing site is one surface. The moment agents or developers manage their own listings, you are building a second authenticated app with its own UX, permissions, and edit flows.

If your build needs all three at once, you are at the top of the range, not the bottom.

Landing near €6.5k means a focused build: listings with search and filters, detail pages, agent profiles, inquiry forms with email notification, and an admin CMS where you manage listings. One map provider, sensible filter set, a clean image pipeline.

Pushing toward €22k usually comes from:

• A full self-service agent/developer portal instead of a single admin panel
• Map clustering and viewport loading tuned for large inventories
• Bulk media tooling and per-listing gallery management at scale
• Heavier filter logic (saved searches, multi-criteria, fast queries over big datasets)

The honest move is to cut the portal in v1 and run admin-managed listings first. You ship faster, validate demand, and add the portal once real agents are asking for it. Pizzeria Bestek (React + Supabase) shipped exactly this way — a tight CMS-backed site first, scope added only when it earned its place.

The build quote is not the total cost of ownership. Budget for these separately:

• Maps. Google Maps or Mapbox bill per load above a free tier. A busy listings site with map views can move from free to a monthly bill faster than expected — plan for it.
• Image hosting and delivery. Property photos are heavy. Storage plus CDN bandwidth is an ongoing cost that grows with your inventory.
• Email. Inquiry notifications run through a provider like Resend — cheap, but a real recurring line.
• Hosting + database. The platform itself needs hosting and a managed database. Modest at launch, scales with traffic.
• Maintenance. Dependency updates, security patches, and small fixes. Budget a realistic monthly or per-incident amount rather than assuming the site is "done" at launch.

Note the quoted range excludes MLS/third-party feed integration, mortgage calculators, virtual tours, and a mobile app. Each is a separate scope and a separate cost.

For a real estate platform, fixed-milestone billing is the better fit. The feature set is knowable upfront, and the genuine risk — image volume, map performance, and the portal hitting at the same time — is something to resolve in scoping, not discover hourly. Fixed milestones keep both sides honest: you know the price, I carry the estimation risk.

Hourly only makes sense for genuinely open-ended work (ongoing feature work after launch, or an exploratory portal where requirements are still moving).

Timeline: 7–14 weeks. A focused, admin-managed build lands near the low end. Add a self-service agent portal, large-inventory map tuning, and heavy media handling and you are in the 12–14 week range. Working solo, this runs leaner than an agency quoting the same scope — fewer handoffs, one person who holds the whole picture from search architecture to deploy.