Build a proptech app — real estate technology for modern property transactions.
Property search, transaction management, and investment tools are moving digital. Proptech applications built on MLS data, property records, and transaction APIs unlock new real estate business models.
Real estate entrepreneur or broker who needs a custom proptech application — not a generic IDX site but a platform that creates a specific transaction or investment experience
The real estate industry has fragmented data sources and legacy technology. Proptech opportunities emerge from connecting data sources in new ways or creating a better transaction experience.
Proptech data sources:
MLS data: Residential listing data. RESO Web API (the modern standard replacing RETS). Local MLS membership required to access data. REACH and Spark Platform APIs aggregate multi-MLS data.
Property records: County assessor records, deed data, mortgage data, tax records. ATTOM Data Solutions, CoreLogic, or Regrid APIs for national coverage.
AVM (Automated Valuation Model): Zillow Zestimate API (limited), Quantarium, or CoreLogic AVM for estimated property values.
Proptech business models:
- Search + lead capture (traditional IDX, improved UX)
- Investment analysis (underwriting tools, deal analysis)
- Transaction management (offer management, document workflow)
- Property management (tenant portal, maintenance, lease management)
- Short-term rental (direct booking, dynamic pricing)
Proptech application deployed — MLS or property data integration, transaction workflow, and the specific features that create value in the real estate niche
MLS integration
RESO Web API listing search and display
Property search
map-based search with filters
Investment analysis
cash flow projections, cap rate, ROI calculators
Transaction workflow
offer management, document collection, timeline
Market data
comparable sales, price trends, neighborhood data
Lead management
buyer/seller lead capture and CRM
One honest number to start.
Fixed-scope, fixed-price. The number below is the starting point — final scope is built from your brief.
Proptech application deployed — MLS or property data integration, transaction workflow, and the specific features that create value in the real estate niche
Three steps, every time.
The same repeatable engagement on every project. No surprises, no mystery, no billable ambiguity.
Brief & discovery.
We send you questions, then get on a call. Output: a written scope with every step, feature, and integration listed.
Build & ship.
Fixed schedule, weekly reviews. No scope creep unless you change the scope — and if you do, we reprice it transparently.
Warranty & retainer.
30-day warranty on every launch. Most clients stay on a monthly retainer for ongoing features and maintenance.
Why Fixed-Price Matters Here
Proptech applications have defined data integration and transaction workflow patterns. Fixed-price from the spec.
Related engagements.
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Read more02Build a property management system — custom, not another subscription.
Read more03Marketplaces are harder to build than most applications. The complexity is in the transaction layer.
Read moreQuestions, answered.
MLS data requires membership in the local MLS or access via a licensed data aggregator. For national coverage, companies like Spark Platform or Estated aggregate multiple MLSs. Data access agreement and licensing required before development.
Local MLS access: 2-4 weeks for application and approval. Aggregator APIs: 1-2 weeks. Data access timeline is parallel to development — start the application early.
Tell Ryel about your project.
Describe what you’re building and what outcome you need. You’ll have a written, fixed-price scope within the week.