Denver Deploys PermitFlow AI to Process 73% of Residential Permits

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Denver Deploys PermitFlow AI to Process 73% of Residential Permits

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The City of Denver has deployed PermitFlow AI, a document understanding engine fine-tuned on Denver municipal code, to process 73% of residential permit applications with sub-90-second turnaround times. The system uses a fine-tuned Llama 3 70B base model augmented with RAG pipeline pulling from official building code API and geospatial zoning layers. YOLOv8 object detection extracts structural elements from site plans before feeding into the LLM for code compliance reasoning. Median end-to-end processing takes 1.8 seconds per application on NVIDIA L40S GPU. The system achieves 89.4% F1-score on variance detection tasks, outperforming legacy rule-based engines by 22 points in blind audits. When Denver updated its ADU ordinance in March 2026, the system required only 4 hours of retraining versus 200+ hours for traditional platforms.

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