LandlordOS

A property management platform built for small landlords, covering properties, leases, rent, maintenance and tenant communication in one dashboard — scoped deliberately below the enterprise systems aimed at large portfolios.

A portfolio dashboard surfacing revenue, rent collection rate, open maintenance and expiring leases; property and unit management with drill-down views and occupancy status (occupied/vacant/maintenance); lease records with dates, amounts and 90-day renewal alerts; rent tracking that models partial payments alongside paid, pending and overdue states; expense tracking by property, category and vendor; a maintenance request queue with priority levels and resolution tracking; bulk data import; automated alerts for lease expiry, overdue rent and ageing repairs; WhatsApp tenant messaging.

A Next.js App Router application organised by route groups — landing, auth, password reset and an authenticated (protected) area containing dashboard, properties, leases, finances, maintenance, import, WhatsApp and settings. Supabase provides Postgres, authentication and row-level access control, with Zod validating input at the boundary and TypeScript enforcing the domain model end to end.

Tenant messaging is implemented as a deep link rather than a WhatsApp Business API integration: one tap composes a pre-written message and opens it in the landlord's own WhatsApp, from their own number. This avoids API approval, per-message costs and number migration.