What does it cost to build an app like Zillow?
Sample range · freelance
$31k–$71k
An agency would be $56k–$156k for the same scope. This is a pre-computed sample, not your estimate. Your version is probably smaller.
Where the money goes
Why this kind of app is expensive
A valuation model for every address is a real data-science system trained on sale history, not a formula in a spreadsheet.
Ingesting and de-duplicating listing data from multiple feeds is an ongoing pipeline, not a one-time import.
Map-based search at scale needs real geospatial indexing to stay fast past a few thousand listings, and agent lead capture turns the app into a two-sided product even though only one side is visible.
The cheapest honest version of this idea is manual listing entry, no automated value estimates, email alerts instead of push. That lands nearer $22k–$49k.
Your app is not Zillow. Get the range for what you are actually building.
Not open yet
Launching this weekend.
The free range, the $79 spec and the $199 execution pack all open then. Nothing to sign up for — come back and paste your idea.
Same maths, other archetypes