Real estate app development for brokerages, portals and property managers.
We build listing and search platforms, property management systems, and agent and tenant portals.
For listing products, we establish the data route and display permissions before the build.
- 120+Projects delivered across 12 countries since 2012
- 100+Senior in-house engineers, six countries
- 2 to 4 weeksTypical time from signature to start
- ISTQBISTQB-certified QA engineers
- ISO 27001Certified security practice, audited by Quay Audit UK
01Overview
Choose the first scope for your property platform
We recommend a new platform, an extension or a focused integration around your priority workflow and existing systems. For a listing product, we review a feed sample and display agreement as part of that decision.
- Find and matchHelp buyers find the right property and follow changes.
- Map and criteria search
- Saved searches and alerts
- Listing detail and media
- List and syndicateConnect the app to the listing sources your market supports.
- MLS, RETS and IDX feeds
- Portal and partner APIs
- Photos, plans and tours
- Manage and operateGive property managers one workflow for the tenancy lifecycle.
- Units, tenants and leases
- Maintenance and requests
- Rent and payment flows
- Property integration and QATwo verified property-client reviews cover listing integration and independent property QA.
02Compare
Choose the listing data route for your property app
The listing source sets the refresh and display conditions for your app. We choose the integration route around the access you hold and the listing workflow you want to support.
| How the data arrives | What stale data costs you | What it means for the build |
|---|---|---|
| Direct MLS access over a modern web APIRESO Web API | Changes missed between refreshes | Use incremental pulls where the API supports a timestamp field. The board’s agreement sets caching and display permissions, alongside the refresh schedule.Platform and integration workOr book a meeting |
| A legacy RETS feed, delivered as XMLRETS / custom XML | Incomplete listings after a partial pull | Stage incoming records and reconcile the pull before updating live listings, so a truncated XML load does not become a set of withdrawals.Data engineering and pipelinesOr book a meeting |
| An IDX feed from your board or a vendorIDX display | Withdrawn or changed listings still on display | Extend a brokerage site with the IDX listings your agreement permits, including required attribution, refresh frequency and restrictions on display.Web developmentOr book a meeting |
| A direct portal or vendor APIfor example Spark API | Search and alerts using outdated records | Build around the API’s supported fields and update limits. Spark API can drive map search and listings alongside a RETS feed for listing reception.What that client wrote about itOr book a meeting |
| Your agents type the listings inmanual entry | Agent time to update and reconcile listings | Keep agent-entered listings when that fits the catalogue. Build the website and alert emails around that workflow, then assess a feed as listing volumes and update needs grow.The problems worth fixing firstOr book a meeting |
03Solutions
Property software for buyers, agents and managers
Build a complete property platform or extend the listing and tenancy workflows your users already rely on.
Map and criteria search over a live listing feed, with filters, saved searches and email alerts that reflect updates to the property record.
- Right for
- Brokerages and portals with a feed
Units, tenants, leases, maintenance requests and payment flows, built around your property-management workflow and connected to the systems you retain.
- Right for
- Landlords and managing agents
MLS, RETS, IDX and direct portal APIs, with staging and reconciliation for late or partial pulls.
- Right for
- Products using third-party listing data
Role-based access to a shared property record, with the relevant information and actions for agents, buyers and tenants. We scope offers, negotiation, documents and e-signature around those roles.
- Right for
- Shared agent, buyer and tenant workflows
iOS and Android apps connected to your existing property platform, sharing listing records, saved searches and alerts.
- Right for
- Mobile access for agents and buyers
Document handling, image processing and retrieval across the property paperwork you hold, with QA for the resulting workflow.
- Right for
- Document workflows in property products
04Rules
Requirements for a property platform
We turn the listing agreement and the requirements for your markets into implementation decisions before the build.
MLS and IDX display rules
The feed agreement sets what you may display, how you attribute it, how often you refresh, and what disappears when a listing is withdrawn.
- In a build
- Refresh, attribution and withdrawal handling
Fair housing and advertising
We scope how US fair-housing and advertising requirements affect listing descriptions, targeting and ranking.
- In a build
- Ranking logic you can explain
Personal data on buyers and tenants
Saved searches, viewing history, tenancy applications and identity documents shape the access controls and retention rules for buyer and tenant data.
- In a build
- Retention decided in the data model
Rent, deposits and card data
Rent and deposit flows need a defined payment-provider boundary and market-specific rules for holding client money. We scope which systems handle card data.
- In a build
- Payment and card-data boundaries agreed
Documents and the audit trail
Record who saw which version of an offer, contract or disclosure, and when. The event history and retention model are part of the design.
- In a build
- Document versions and event history
Accessibility of a public listing site
We scope WCAG 2.2 AA for public listing pages and map search during design, so accessibility informs the interaction and testing requirements.
- In a build
- Accessibility designed and tested
Certified management systems and agreed access
Our information security and quality management systems are certified to ISO 27001:2022 and ISO 9001:2015, renewed through a multi-stage audit with Quay Audit UK. unicrew has ISTQB-certified QA engineers. On build engagements, contracts and NDAs come first; access is least-privilege and agreed with your technical contact.
In a property app, how fresh the listings stay decides whether buyers trust the product. So we prove the data route with a real feed sample first. Then we design search, detail and alerts to handle a late or partial feed.
Andrii BurdaSenior Engineering Manager, unicrew05Delivery
From property workflow to a working release
We establish the data inputs before designing the property workflow, then deliver a release your agents or property managers can use.
- Prove the data routeWe inspect the property records and system connections the workflow needs. For listings, we test a real feed sample for refresh timing and missing records, then check display and caching permissions.You getA written data route, with the relevant refresh and display rules
- Design the workflow and data statesWe design the property workflow around the records it uses. Listing search, detail and alerts include states for a late pull, an incomplete load or a status change between syncs.You getScreens and states, including what shows when data is stale
- Release the priority workflowWe put the priority workflow in front of agents or property managers using your own records, then use that working release to guide the remaining scope.You getWorking software with your own property records
- Operate and hand overWe maintain the sync, alerts and integrations, and document their operation for the team taking ownership of the platform.You getMonitoring, documentation, and a system your team can run
06Proof
Listing integrations and independent property QA
Our property work connects listing data to buyer-facing search and tests workflows on an AI property platform.
- Listing search for a Florida brokerageWe rebuilt Matok Realty's site in Ormond Beach, Florida, around Spark API listings and a RETS/MLS XML feed. In his 2017 Clutch review, the owner says "We started working with them in 2015 and have been working together since" and "I was really happy that I didn't really have to do any revisions or anything like that". Delivered under our former Artelogic brand.2015the year this client started with us
- An AI property platform, tested independentlyWe provided independent QA for Open Room Inc.'s Forest project, an agent and buyer platform using image processing and AI to handle Japanese property paperwork. The work covered a QA process, a tailored test-case system, TestCafe automation and a testing roadmap. The CTO's review says "We really appreciated the fact that Artelogic was very autonomous and explored the product on their own".QAindependent, on a live proptech product
- Feed integration in adjacent marketsOur adjacent work connects carrier and hotel-content APIs to the workflows people use. Explore logistics and hospitality, including the web GUI over an API-first hotel-content platform for a German hotel-content company.
07Client voices
What property clients say
I was really happy that I didn’t really have to do any revisions or anything like that. I think they were pretty good at gauging my needs. They definitely gathered enough information during the QA phase, which was very good. I’m very happy with the communication. They were able to figure out what I wanted quickly, to meet my needs, and envision what I would have wanted.
Artelogic’s work had a very positive impact on our team’s morale. As our development quality was improving, our engineers were more confident in what they were doing, allowing them to work faster and with more confidence. As a result, our releases took less time and were less stressful.
08Case studies
Property QA, API interfaces and mobile delivery
Explore independent QA for a property platform alongside hotel-content interface work and mobile apps for building-security software.
See all case studies
Real EstateQuality Assurance service for Japanese real estate platformunicrew provided QA consultancy for a leading Japanese real estate platform, which resulted in a tuned QA workflow and test automation.- HospitalityA shippable web GUI over an API-only hotel-content applicationunicrew produced a shippable, well-received web GUI over an API-only application.
- SecurityiOS and Android apps for a building-security software companyunicrew contributed to the iOS and Android apps of a security software company, built on its existing web client, through to the production release.
09Questions
Real estate app development: frequently asked questions
Yes. We scope MLS, RETS, IDX and direct portal integrations against the feed you can access and its display agreement.
Send a feed sample and agreement. We assess freshness, supported fields, staging and reconciliation, including what the app should show when a pull is late or partial and what may be cached.
We quote real estate app development against the agreed scope and recommend the commercial model after discovery.
- Time and materials: billed hourly, quoted per project.
- Fixed price: quoted per project against an agreed outcome.
- Team extension: billed monthly per team member.
A saved-search alert and a property management system that handles rent require different scopes. A post-launch warranty is standard on fixed-scope work, with the length agreed per contract.
Most engagements start within two to four weeks of signature. We set the delivery schedule after reviewing your priority workflow, existing systems and product scope.
For listing products, feed access, board approval and display permissions affect the sequence. A legacy RETS integration can also require staging and reconciliation before search, detail and alerts are ready for release.
We build both web platforms and iOS and Android apps for agents and buyers.
Where you already have a property platform, the mobile apps share its listing records, saved searches and alerts. We assess the underlying data and integration layer before extending it to another interface.
In adjacent building-security work, we contributed features to existing iOS and Android apps built on a web client, including layout, theming and video streaming improvements.
Yes. We add document handling, image processing and retrieval to existing property products, with the scope based on the records and workflows you hold.
Disclosures, tenancy applications, floor plans, inspection reports and contracts give discovery a concrete starting point. We assess your data before scoping automated valuation.
We agree the security and data requirements for your property platform during discovery, including GDPR, card-data scope and listing display obligations.
On build engagements, contracts and NDAs come first. Access is least-privilege and agreed with your technical contact, read-only wherever the work allows, with no production write access during discovery.
Our ISO 27001:2022 and ISO 9001:2015 certifications cover information security and quality management systems, renewed through a multi-stage audit with Quay Audit UK. unicrew has ISTQB-certified QA engineers.
Plan the next release for your property platform
Bring the workflow you want to build and the systems you use. For a listing product, include a feed sample and display agreement so we can assess the data route.
What happens after you contact us
- We reply within one business dayTell us about your property product and existing systems.
- A call about the data firstWe review your property workflow, data sources and relevant permissions.
- Route and engagement model, in writingPriced as time and materials, fixed price, or team extension.
- NDA, then discoveryMost engagements start within two to four weeks of signature.