In heavily regulated industries, compliance can either be a safeguard or a roadblock.
For housing associations in Germany, where regulations govern everything from tenant rights to funding structures, compliance had become a constant struggle
Legal and administrative teams weren’t lacking expertise; they were lacking time.
That’s where VdW Bayern DigiSol GmbH, the digital subsidiary of Germany’s largest housing association, decided to take a bold step forward.
Instead of adding more manual processes or expanding legal headcount, they turned to artificial intelligence.
The result was WohWi AI, an AI-powered compliance assistant trained on thousands of regulatory and operational documents. Early results show significant time savings and strong user approval.
In this blog, we’ll break down how VdW Bayern launched the assistant in under 60 days, cut compliance task time by half, and built a scalable blueprint for regulated industries everywhere.
The Hidden Struggle of Compliance Burden No One Talks About
Across Germany, housing associations face an invisible but enormous challenge: compliance. Every policy update, every new regulation, every operational rule must be understood, applied, and documented correctly.
For property managers and administrative staff, this meant countless hours digging through regulations, interpreting clauses, and double-checking documents.
The burden was not simply about information overload. It was about risk.
When “good enough” isn’t good enough
In housing, mistakes in compliance are costly—both financially and reputationally. And for many organizations, the situation was getting worse:
- Fragmented knowledge access: Housing professionals were spread across thousands of regulatory documents. Even answering routine questions could take hours.
- Staffing constraints: Smaller associations lacked the legal expertise to interpret complex frameworks quickly.
- AI skepticism: Previous digital tools had promised efficiency but delivered little, leaving staff doubtful about new solutions.
- Accuracy requirements: In compliance, “close enough” is not acceptable. Teams needed answers they could trust, backed by verifiable sources.
These challenges left housing teams stuck between increasing regulatory complexity and limited resources. The pressure for modernization was growing.
Why Housing Teams Needed Answers—Not Just Documents
Traditionally, compliance AI workflows relied on document search. Teams sifted through PDFs, binders, and shared drives, cross-referencing laws and guidelines. It was slow, manual, and prone to bottlenecks.
Even when information was available, it wasn’t accessible. Staff often had to escalate questions to legal experts, who were already overburdened. This led to delays in decision-making and mounting frustration.
The gap was clear: housing professionals didn’t need more documents. They needed immediate, trustworthy answers drawn from those documents, delivered in a way that was easy to understand and act on.
Building Trustworthy AI Without Writing a Single Line of Code
Why DigiSol chose CustomGPT.ai
VdW Bayern DigiSol GmbH vision was WohWi AI, an assistant designed to modernize knowledge delivery across the housing sector.
But they faced a critical constraint: they didn’t have a large team of AI engineers. What they needed was a way to build and launch a reliable, sector-specific AI tool without writing a single line of code.
That’s where CustomGPT.ai came in. Using the no-code platform, DigiSol could configure, train, and deploy the assistant themselves. The process was fast, transparent, and allowed them to stay in control of their content.
Dr. Korbinian Weisser, Managing Director at VdW Bayern DigiSol, described the impact:
“We are very pleased that we decided on CustomGPT.ai for building WohWi AI. The platform made it straightforward to turn our vision for WohWi AI into reality, and the results have been significant. Our AI solution now enables members to make informed decisions faster and with greater confidence—saving valuable time while ensuring compliance with changing regulations.”
Training the Assistant on 3,600 Documents—Without Hallucinations
Trust was the non-negotiable factor. To succeed, WohWi AI needed to avoid the common pitfalls of generic AI: hallucinations and vague answers. DigiSol solved this by grounding the assistant in their own curated content.
- Training base: 3,620 internal regulatory and operational documents (~25 million tokens).
- Coverage: Laws, compliance guidelines, operational templates, and sector-specific policies.
- Transparency: Every response came with a direct source citation, so staff could verify instantly.
This approach built confidence among users. Instead of questioning whether the AI “made something up,” staff could click through to the original source. That shift turned skeptics into believers.
Examples of real queries WohWi AI handled included:
- “What is a §34 zone in connection with urban development plans?”
- “As a small cooperative, am I subject to CSRD?”
- “Create a letter; invoice for a key order attached.”
For housing professionals, these were everyday tasks. With WohWi AI, they could now complete them in minutes instead of hours.
From Pilot to Platform: How WohWi AI Was Deployed in 60 Days
What began as a pilot quickly scaled into a full sector-wide platform. DigiSol’s rollout followed a clear path:
- Configuration: Using CustomGPT.ai’s no-code platform, DigiSol trained the assistant on their proprietary content.
- Pilot: Early users tested the assistant, validating accuracy and transparency of responses.
- Deployment: Within 60 days, WohWi AI went live on wohwi-ki.de, a public-facing platform for housing associations.
- Adoption: Hundreds of associations began using it, embedding AI into their daily workflows.
The strategic choice to make WohWi AI public-facing was key. Rather than restricting it internally, DigiSol positioned the assistant as a shared resource across the sector, multiplying its impact.
The Business Impact You Can’t Ignore
In just six months, WohWi AI transformed compliance work across Bavaria’s housing sector. The measurable results were clear:
- 50–60% reduction in compliance task time: Routine documentation dropped from 45 minutes to 15-20 minutes.
- 84% positive feedback: Housing professionals rated the tool as a trusted part of their workflow.
- 7,000+ queries answered: Across 2,000 conversations, WohWi AI provided immediate, source-backed answers.
The qualitative impact was just as important:
- Productivity gains: Staff could focus on higher-value work instead of repetitive lookups.
- Trust restored: With transparency and citations, skepticism around AI was significantly reduced.
- Scalable efficiency: What worked in housing could serve as a model for other regulated sectors.
By embedding AI directly into workflows, DigiSol turned compliance from a burden into a competitive advantage.
👉 Read the full case study here
Frequently Asked Questions
How exactly does WohWi AI work?
WohWi AI is trained on more than 3,600 proprietary documents. Staff ask questions in plain language, and the assistant responds with answers backed by direct citations from those documents.
How reliable is it for compliance tasks?
Reliability was a top priority. Every answer comes with a source link, so users can confirm accuracy immediately. This transparency makes it safe for compliance-critical work.
How fast was implementation?
The full project—from pilot to public deployment—took less than two months. No coding was required, and DigiSol managed the rollout themselves using CustomGPT.ai.
Do staff need technical training to use it?
No. WohWi AI is designed for ease of use. Housing professionals simply ask questions in natural language and receive verifiable answers.
Can this scale beyond housing?
Yes. The same model can apply to any compliance-heavy industry. Finance, healthcare, and legal teams face similar challenges and can benefit from sector-specific AI assistants.
What about privacy and data control?
All training data came from DigiSol’s curated internal documents. WohWi AI does not pull from uncontrolled external sources, ensuring privacy and security.
Does this replace legal experts?
Not at all. WohWi AI handles routine queries, freeing experts to focus on complex, high-value issues. It’s an assistant, not a replacement.
How can other organizations replicate this success?
By working with CustomGPT.ai, organizations can train their own assistant on their sector-specific knowledge—quickly, securely, and without code.
Conclusion: A Blueprint for Compliance at Scale
VdW Bayern DigiSol’s WohWi AI is proof that AI can deliver real results in compliance-heavy industries. In just six months, they cut compliance task time in half, restored trust in digital tools, and gave housing associations a faster, safer way to operate in a regulated environment.
The lesson is clear: when AI is grounded in curated content, delivered transparently, and deployed with speed, it becomes more than a productivity booster—it becomes a compliance blueprint.
Ready to Build Yours?
Housing is just the beginning. Any sector weighed down by regulation can replicate this model.
Whether you’re in finance, healthcare, or government, AI assistants built with CustomGPT.ai can reduce compliance burdens, accelerate decisions, and increase trust.
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