Promodomo / ALTUM AI

AI-driven real estate valuations at scale

Core Idea Discovery

User Stories / Journey Mapping

Graphic Interface

MVP Build

COUNTRY Netherlands
INDUSTRY Real Estate
PEOPLE INVOLVED 5

The Problem

The Dutch real estate market is complex, fragmented, and fast-moving. Buyers, agents, and investors often rely on outdated, manual methods for valuing properties—slowing down transactions and leaving room for error.

Databases are siloed, valuations take days, and accessing full property histories is difficult. In a market where speed and accuracy matter most, this gap was costing both professionals and consumers time and money.

Altum AI (formerly Promodomo) set out to fix this: an automated valuation model (AVM) that could process millions of records and return an accurate property value in seconds. But after an initial failed attempt with another agency that left behind tech debt and delays, they needed a new partner to bring the vision to life.

The Solution

Promodomo / ALTUM AI teamed up with ASPER BROTHERS to rebuild the platform from the ground up. Starting with a proof of concept, we demonstrated scalability, performance, and a clear path beyond the legacy debt.

Using our 4-Step MVP Framework, we created a cloud-based architecture capable of aggregating 7 million+ property records into a single system. With machine learning models layered on top, the platform now delivers instant, AI-powered valuations—making property insights accessible to everyone, from consumers browsing homes to agents closing deals.

The stack combined Python, FastAPI, PostgreSQL, Elasticsearch, and AWS, optimized for speed and scale.

Key Features

Automated Valuation Model (AVM)
➔ Property valuations delivered in under 5 seconds
➔ Models trained on millions of historical transactions
➔ Confidence scores to guide decisions

Unified Property Database
➔ Over 7 million records aggregated from national sources
➔ Cleaned, standardized, and queryable in real time
➔ Scalable to support constant data refresh

Real-Time Cloud Architecture
➔ High-performance API layer (FastAPI + Elastic)
➔ Fully hosted and managed on AWS
➔ Designed to integrate with future data sources and services

Feedback from the founder

Founder feedback speaks louder than any case study

ASPER BROTHERS creates value for our growing customer base. Since the platform is our core, the team’s improvements and added features have greatly benefited our company. The team is a highly responsible and reliable partner.

Jorik Jol, Founder, Promodomo

TALK WITH US

Impact

Promodomo’s MVP has transformed real estate data access in the Netherlands. What was once slow and fragmented is now instant, accurate, and centralized.

➔ 7M+ properties indexed in a single platform
➔ Valuations generated in under 5 seconds
➔ Significant improvements in performance and reliability
➔ Early adopters report faster decision-making and stronger customer engagement

For agents and investors ➔ Data-driven valuations improve deal confidence and shorten transaction times
For consumers ➔ Transparent, easy-to-access information builds trust in the buying process
For the market ➔ Sets a new benchmark for real estate intelligence in Europe

ALTUM AI is now positioned as a leader in AI-driven real estate solutions, with a platform built for growth and innovation.