Custom real estate
infrastructure
for firms operating
above the standard.
A unified system for listings, leads, documents, and client communication, designed around how real estate actually works. Compliance built in. AI-augmented operations. The brand experience your asset class deserves. Fourteen days to productive launch.
Where the standard tools fall short.
Real estate runs on systems that were not designed for real estate.
Your CRM was built for sales teams in software companies. Your document workflow is a manual relay between identity checks, contracts, and signatures. Your client portal, if you have one, looks like it was built a decade ago. Your most important channel, Funda, sets the rules and changes them at will.
Below the surface, your operation runs on five disconnected systems with no single source of truth. Compliance is technically handled; in practice, an audit would take days. Differentiation from competitors is hard when everyone uses the same templated tools.
Listings, leads, viewings, documents, client communications, analytics — in one custom-built system designed for your workflow. Not generic CRM modules or a patchwork of integrations. Built for how your firm actually operates.
Identity verification (iDIN, DigiD, ValidSign), AML screening, document audit trails, and GDPR-compliant data handling built into the system. Not bolted on or external. When an audit comes, the evidence is one query away.
Lead scoring based on actual signals. Property descriptions drafted in your firm’s voice. Document generation from templates. Client follow-up suggestions based on conversation history. AI doing the work that humans should not have to.
Custom client portals for buyers, sellers, tenants, and investors. Branded sales sites for individual developments. Investor communications that look like the financial commitment they represent. Differentiation built into every surface.
The engagement.
Every engagement begins with an application. We respond within three business days with an invitation to conversation or a considered decline.
The build takes fourteen days from kickoff to productive launch. Your CRM operational, listing distribution live, and the first compliance layer (iDIN, DigiD, or comparable) in place. Deeper compliance automation, full audit-trail implementation, and broader data migration continue as partnership work in the weeks that follow. That is how serious infrastructure comes to maturity, not as scope creep.
The fourteen days after launch carry an included stabilization period. Fixes, refinements, and adjustments grounded in real client interactions and real compliance flows, at no additional cost. Day fourteen is a productive base; day twenty-eight is a validated system.
After that, you enter an ongoing partnership at one of two tiers. Most engagements begin with a setup investment between €10,000 and €15,000, slightly above the standard range due to compliance complexity. Specific pricing is discussed in the intake conversation.
The ecosystem.
Altum integrates with the systems you depend on and replaces the ones holding you back. Common integrations include:
- Listings
- Funda API, Realworks, Pararius, JAAP, international portals on request.
- Identity & signing
- iDIN, DigiD, ValidSign, DocuSign, Signhost.
- Property data
- Calcasa, Brainbay, kadaster integrations.
- Accounting
- Exact Online, AFAS, Twinfield, Yuki.
- Communication
- SendGrid, Postmark, WhatsApp Business API.
- Calendar
- Outlook, Google Calendar for viewing coordination.
- Vacation rental specific
- Channel manager integration or replacement (Hostfully, Smoobu, Hostaway), smart lock systems, pricing tools.
Any system with an API can be integrated. Anything proprietary is built as part of your engagement.
Who we work with.
Altum serves three types of real estate operators: established brokerages with 5+ employees and €1M+ in annual revenue, project developers and investment firms with active portfolios, and vacation rental operators with 10+ units and a serious direct-booking ambition.
Across all three, the prerequisite is the same: an operation mature enough to justify infrastructure investment, and the recognition that current tools are limiting growth or quality.
We accept a limited number of engagements per quarter. We work primarily with firms in the Netherlands and Belgium; other European markets case by case.
If this is the operation
you are building — apply.
Applications are reviewed personally. Three business days for a response.
Apply