Project Overview

Nexa AI: Transforming Legal Rental Assistance with Intelligent RAG Technology

Beyond Himalaya Tech successfully developed and deployed Nexa AI, an intelligent legal assistant that revolutionizes how tenants, landlords, and property managers access information about residential tenancy law in the Australian Capital Territory (ACT). Built on cutting-edge Retrieval-Augmented Generation (RAG) technology, Nexa AI provides instant, accurate, and cited responses to complex legal questions based on the official ACT Residential Tenancies Act 1997.

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The Challenge

Real Estate Customer Enquiry - Problem Statement.

Tenants, landlords, and property managers in the Australia face significant challenges. Some of the challenges are listed below:

Time-Consuming Research

Finding specific information in the 200+ page Residential Tenancies Act required extensive manual searching.

Inconsistent Information

Different sources provided conflicting interpretations of legal requirements.

High Consultation Costs

Legal advice for routine tenancy questions was expensive and often unnecessary.

Accessibility Barriers

Complex legal language made the Act difficult for non-lawyers to understand.

Outdated Information

Static resources couldn’t keep pace with legislative updates.

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The Solution: Nexa AI Platform

One Smart Platform for Every Legal Stakeholder - Now for Real estate.

Nexa AI serves as a comprehensive legal assistant platform designed specifically for the Australian Capital Territory residential tenancy ecosystem, providing tailored experiences for each user type while maintaining a unified knowledge base grounded in ACT legislation.

Technical Architecture

Beyond Himalaya Tech designed and implemented a sophisticated AI-powered legal assistant using state-of-the-art technologies.

Backend Infrastructure

The backend was built with FastAPI in Python, ensuring high-performance API development and seamless scalability. The AI engine leveraged LlamaIndex integrated with OpenAI’s GPT-4, enabling intelligent document understanding and contextual reasoning. A PostgreSQL database enhanced with the pgvector extension powered semantic search, using OpenAI’s text-embedding-3-large model for precise data representation. To further improve accuracy, Cohere’s reranking API refined search relevance. Secure user authentication and management were handled through Supabase, maintaining both reliability and compliance.

Frontend Infrastructure

The frontend was developed using React 18 with TypeScript, providing a robust and type-safe environment for building scalable interfaces. The design combined Radix UI components with Tailwind CSS, resulting in a clean, accessible, and modern user experience. React Query managed data fetching and synchronization efficiently, while Supabase Auth supported seamless authentication, including social logins. The application was deployed on AWS App Runner, ensuring reliable performance and effortless scalability in production.

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Core Features and System Capabilities

Key Features That Power Nexa AI

Nexa AI combines intelligent document processing, advanced RAG-powered retrieval, and a seamless multi-user experience, all built on enterprise-grade security. It delivers accurate legal guidance, role-specific insights, and real-time responses, ensuring scalable, secure, and user-friendly access for tenants, landlords, and property managers.

Intelligent Document Processing

Nexa AI automates the parsing of the ACT Residential Tenancies Act 1997, transforming dense legal text into searchable, structured data. Through semantic chunking of 900-character segments and hierarchical section mapping, the system ensures precise legal citations. Enriched metadata improves discoverability, while ACT-specific terminology and context understanding enable highly accurate, localized legal insights.

Advanced RAG Implementation

The platform employs a robust Retrieval-Augmented Generation (RAG) pipeline that combines vector similarity search with intelligent reranking. Using pgvector, Nexa AI retrieves the top 12 relevant sections before Cohere’s reranking identifies the best five matches. A custom citation synthesizer ensures every answer includes accurate legal references, while context-aware generation keeps responses relevant and compliant.

Multi-User Experience Excellence

Built to serve tenants, landlords, and property managers, Nexa AI offers a unified platform with role-based interfaces for personalized experiences. Users benefit from real-time chat, persistent history, and smart suggestions tailored to ACT law. The mobile-first design ensures accessibility from any device, while dark and light themes enhance usability and comfort.

Enterprise-Grade Security & Compliance

Security and compliance are central to Nexa AI’s architecture. The platform features authenticated user sessions, secure APIs, and adherence to GDPR and the Australian Privacy Act. With audit logging, role-based access controls, and strict privacy measures, every interaction remains safe, transparent, and accountable.

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Smart, secure, and designed for everyone.

The Imapct - What Makes Nexa AI Exceptional

Nexa AI addresses the challenges faced by all stakeholders in the tenancy ecosystem. Property managers, landlords, and tenants gain instant, reliable legal guidance, reducing time spent on routine questions and minimizing compliance risks, while legal professionals can focus on complex matters instead of repetitive inquiries.

For Property Managers

With Nexa AI, routine legal research that once took hours is now instant, compliance risks are minimized, and guidance for tenants and landlords is consistent and reliable.

For Landlords

Nexa AI reduces legal consultation costs, empowers informed property management decisions, and provides easy access to clear, accurate information about rights and obligations.

For Tenants

Tenants can make confident, well-informed decisions with accessible legal guidance, clear explanations of complex requirements, and reliable, up-to-date information about their rights.

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Tech Stack

Tools we Used

React 18, Tailwind, Supabase Auth
Frontend
FastAPI, Python, PostgreSQL with pgvector, Supabase
Backend
LlamaIndex + OpenAI GPT-4
AI Engine
AWS App Runner for seamless cloud scalability
Deployment

Delivering measurable, scalable transformation in real estate.

Key Results That Redefined Legal Rental Assistance

The project delivered instant, reliable, and cost-effective legal assistance for real estate powered by AI. It provided sub-second responses for complex legal queries with 100% accurate citations, wrapped in a modern, intuitive interface. Designed with enterprise-grade scalability, the solution significantly reduced consultation costs, cutting expenses by up to 80% while maintaining accuracy and trust.

Contact Us

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What's happens Next?

Upon form submission, we promptly process your request. Our team then prepares to reach out to you for the next steps.

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We will contact you to discuss your project needs in detail and sign an NDA to ensure confidentiality. This ensures we fully understand your requirements and can protect your information.

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Our analysts and developers create a comprehensive project proposal, including scope, team size, timeline, and cost estimates. We then schedule a meeting with you to review and refine the proposal as needed.

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Once the proposal is approved, we finalize the contract and begin working on your project. Throughout the project, we provide regular updates to keep you informed of our progress.

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