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Property Listing Platform Specification Template

Free property listing spec template for PropTech product teams. Covers listing creation, search indexing, media management, agent workflows, and...

Updated 2026-03-04
Property Listing Platform Specification
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Frequently Asked Questions

What MLS data standards should we follow?+
The [Real Estate Standards Organization (RESO)](https://www.reso.org/) maintains the Data Dictionary, which defines standard field names, enumerations, and data types for real estate listings. Following RESO standards simplifies MLS integration and portal syndication. Most modern MLS systems support the RESO Web API. If you are working with older systems, you may need RETS (Real Estate Transaction Standard) support as a fallback.
How do we handle listing photos at scale?+
Use a dedicated media pipeline. Upload to cloud storage (S3 or GCS), process asynchronously (resize to standard dimensions, compress, generate thumbnails), and serve through a CDN. Set a minimum of 5 photos for published listings and a maximum of 50. Enforce a primary photo selection so search results and cards always show the best image.
How should we structure property search for fast results?+
Use a search engine like Elasticsearch or Typesense rather than database queries. Index listing fields as structured data (not just full-text) so filters and facets are fast. Geo-search with geo_point fields enables radius and map-based discovery. Keep the search index updated within 5 minutes of listing changes using a change data capture pipeline or event-driven sync.
What compliance rules affect listing content?+
Fair Housing Act rules prohibit discriminatory language in listing descriptions (references to race, religion, familial status, disability, etc.). Many MLS organizations have additional rules about required disclosures, photo standards, and listing data accuracy. Build a content moderation layer that flags prohibited terms before listing publication. Review the [Product Strategy Handbook](/strategy-guide) for guidance on building compliant product features into your roadmap.
How do we handle listing deduplication across sources?+
Listings can enter your system from agent input, MLS feeds, and portal APIs. Deduplicate using a combination of address normalization (standardize street abbreviations, unit formats) and MLS number matching. When duplicates are detected, keep the most recently updated version and merge supplementary data (extra photos, descriptions) from secondary sources. Track the canonical source for each listing. ---

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