Weighing of Interests AI
AI-assisted weighing of interests under Art. 3 of the Spatial Planning Ordinance with five specialised AI agents (FACTS, PRO, CONTRA, LAW, MODERATOR). Court-proof along eight Federal Supreme Court criteria, Word export.
AI tools for municipalities, cantons and planning firms. Tested on real building zones, weighing of interests and value capture cases, and developed further all the time.
SPEKTRUM LAB is the AI lab of SPEKTRUM Partner GmbH in Zurich. It develops and operates AI tools for Swiss spatial planning: building zone capacity under Art. 15 of the Spatial Planning Act, weighing of interests under Art. 3 of the Spatial Planning Ordinance, EIA screening, case law search, swept path analysis, value capture levies and AI meeting minutes. Six tools are available online, six services are offered as MCP servers for Claude, ChatGPT and other AI assistants (SPEKT-AI free, full subscription CHF 98 per month). Target groups are municipalities, cantons and planning firms. Founder and head is Andreas Rupf, spatial and urban planner and lecturer in the MAS and CAS in Spatial Development at ETH Zurich.
Ready to use or explained in detail. This is what came out of the lab. Connect all tools directly to your AI assistant via MCP server. Learn more
AI-assisted weighing of interests under Art. 3 of the Spatial Planning Ordinance with five specialised AI agents (FACTS, PRO, CONTRA, LAW, MODERATOR). Court-proof along eight Federal Supreme Court criteria, Word export.
AI-assisted screening of whether a project is subject to an environmental impact assessment (EIA). Checked against the Environmental Protection Act and the EIA Ordinance by facility type, thresholds and site factors, with a traceable justification.
Swiss court rulings on spatial planning and building law in five fields: weighing of interests, building outside the building zone, building permits and environment, land-use planning and second homes, protection, expropriation and value capture. Indexed by field, planning trigger, affected interest and outcome; search free of charge, read the headnote, copy the citation in the court’s own format and open the full text at the court.
AI-assisted calculation of building zone capacity for municipalities. Population forecasts (STATPOP), land reserves, densification potential and scenarios according to cantonal structure plan requirements.
Swept paths without a CAD licence: load the base plan as DXF or DWG, click the carriageway centreline, calculate the swept path with the tractrix model (based on VSS SN 640 271a). With VSS standard vehicles, conflict checking against the plan geometry and export as DXF, PDF or PNG.
Automatic meeting minutes by AI. Upload an audio recording and receive structured minutes – ideal for municipal assemblies, meetings and workshops. GDPR-compliant, hosted in the EU.
Digital calculation of the value capture levy for municipalities (Canton of Zurich). Cantonal levy (rezoning into building zones: 20%) and municipal levy (upzoning and rezoning: 0–40%).
Site assessment of a parcel as an MCP tool in the building zone service: an address or coordinate is enough. Links the PLR cadastre, federal geodata and cantonal thematic maps into a traffic light per topic, with findings and sources, an overall picture and a report. A working aid, not official information.
AI assistant for Swiss planning law. Ask questions in natural language and receive traceable answers on the Spatial Planning Act, the ordinance, cantonal requirements and case law.
Professional planning reports at the push of a button. Generates canton-compliant, traceable and exportable reports from planning data, from the baseline analysis to the finished document.
Quantitative comparison of development variants for inward development, as an MCP tool in the building zone service. Compare densification options, use mix and land efficiency in a structured way, with a zero variant, demand coverage and conformity with the building regulations.
Pre-check of a building application as an MCP tool in the building zone service: zone and use, standard building rules under the building regulations, PLR restrictions, cantonal thematic maps, noise against the sensitivity level, federal inventories and procedural steps. A finding per check item with its source, as a checklist to work from. A working aid, not a building decision.
An AI agent that makes planning and administrative archives searchable. Finds decisions, reports, plans and case files in natural language, with source references, instead of digging through folders and PDFs.
An AI agent for proposals and offers. Searches previous proposals, fee rates and text modules in the company archive and supports the drafting of new offers, consistently and in minutes instead of hours.
Experiments, not promises
SPEKTRUM LAB is not a product, it is a place to think. We develop AI tools at the intersection of spatial planning, public administration and new technologies. Not everything will work. Some of it surprises us, too.
What emerges here is born from practice and teaching: from municipalities that have to calculate their building zones, from planning firms that document the weighing of interests, from authorities that compute value capture levies. Real problems, real experiments.
Four principles from the lab
Every tool starts with a real problem from a municipality, a canton or a planning firm. Not with a technology looking for a use case.
Every statement can be traced to a source: a legal article, a Federal Supreme Court ruling, a geodata set. Results that hold up before authorities and courts.
AI prepares, structures and calculates. The weighing, the zoning decision and the signature stay with the professionals.
EU hosting, open interfaces, data portability. Solutions without lock-in and without dependence on any single provider.
Through the Model Context Protocol, your AI assistant accesses the services itself. Connect once, then use them in the chat.
Query addresses, parcels, EGRID and PLR cadastre extracts right in the chat.
4 tools · subscriptionAssess a parcel, pre-check a building application, calculate capacity, compare variants, generate reports and proposals.
21 tools · subscriptionDirect access to the Zurich GIS: land-use zones, parcels, neighbourhood analysis, natural hazards and more. Other cantons via federal geodata and building zone capacity.
12 tools · subscriptionThematic maps of the Canton of Lucerne across the whole parcel: zoning, hazards, groundwater, noise, heritage, energy, structure plan.
12 tools · subscriptionThematic maps of the Canton of Graubünden across the whole parcel: zoning, design plan, hazards, groundwater, noise, heritage, structure plan, land-use reserves.
14 tools · subscriptionThematic maps of 24 cantons (ZH, SG, AG, BE, VS and BL, BS, ZG, UR, OW, NW, SH, AR, AI, SO, FR, TG, SZ, NE, JU, GE, VD, TI, GL) across the whole parcel: zoning with density figures, hazards, groundwater, environment, heritage and nature, structure plan; more cantons to follow.
31 tools · subscriptionZone factors, value capture calculations and batch assessments for Zurich municipalities.
6 tools · subscriptionStart weighing processes, upload documents, run EIA screenings and search case law.
18 tools · subscriptionProducts, prices and a solution finder. Answers everything about what the lab offers.
5 tools · freeWe are here. Write to info@spekt.ch or use the contact form on spekt.ch. Collaborations, new people and ideas are always welcome.