AI Planning & Zoning Platform — Real Questions, Cited Answers, Live GIS Mapping
24/7
immediate, accurate, always available
100%
answers from adopted plans and ordinances
30%+
increase in staff productivity
Euclid HL turns a community's adopted plans and ordinances — documents that span hundreds of pages of text, maps, and technical diagrams — into a living layer residents and staff can simply ask. Every answer is grounded in the adopted code, cited to the governing section, and linked to the parcel on the map; when a diagram answers better than text, the relevant figure comes back with the response.
Built at Houseal Lavigne by combining GIS technology with large language models, it's a platform, not a chatbot: staff interpretations accrue on the code itself as institutional memory, and it's now live in communities across North America.
Rebuilt here in code, not a screenshot: the Cornwall, Ontario deployment — a cited answer on the left, the live zoning map with the parcel highlighted on the right.
Cornwall
ONTARIO · CANADA
Hi, I'm Euclid HL for Cornwall, your planning and zoning assistant.
Euclid HL can make mistakes. Check important info.
Cornwall Zoning
Zoning, comprehensive plans, by-laws, process and procedure — answered from each community's adopted documents and cited to the section.
“I have property at 923 Main Street. Can I open a restaurant here?”
Yes — if your parcel is in the GC, General Commercial district, a sit-down restaurant is permitted by right. You'll still need a building permit for tenant improvements and a county retail food license.
“How tall can my fence be on a corner lot?”
On a corner lot, the Zoning By-law adds the rule that matters most: a 6 m sight triangle must be kept clear at the intersection so sightlines stay open. Where a yard abuts a Residential Zone, a 1.86 m screening fence is required.
Figure returned with the answer · 6 m sight triangle
“Can I build an ADU behind my house?”
Yes — a detached ADU is capped at 850 sq ft (one bedroom) with a 4-ft rear and side setback. ADUs are exempt from the usual FAR, lot-coverage and open-space limits, and no extra parking is required when the lot is near transit.
Conversations are illustrative of production behavior; answers in deployment are grounded in each community's adopted code.
From its first deployment in Cañon City, Colorado, Euclid HL has grown to communities across the United States and Canada.
The conversational layer is the front door. Behind it, Euclid HL builds the institutional memory of how a city plans and governs itself.
Every response traces to the adopted code section that governs it. Residents see the source, not a summary of one.
Ask about an address, see the parcel. Zoning, planning designation, overlays, and boundaries rendered live alongside the conversation.
Setback figures, build-to illustrations, encroachment graphics, and renderings — included when a picture answers the question better.
Planning policy and zoning regulations are related, but very different. Euclid HL knows the difference and accurately answers questions about both.
Staff interpretations and annotations accrue in the platform. When a senior planner retires, the knowledge stays.
Track what issues are neighborhood-specific or common city-wide, so staff know what matters most where — and can act on it.
Explore the product site, or try the live Cornwall, Ontario deployment and ask it a real planning question.