Okay, let me tackle this request. The user wants a concise French summary of parcel data, max 250 words, written like a real estate pro. No markdown, just plain text in one or two paragraphs. Need to avoid any AI-sounding phrases, keep it natural.
First, I'll scan the parcel data. Key elements: location in Avenches, Avenue Général Guisan 2, postal code 1580. Building constructed in 1973, 111 sqm, two stories. Land area 1200 sqm. Zone designation "Zone de villas" for residential use. Development capacity has a COS of 0.2, max stages 3. There are some plans linked, like the municipal ordinance. Also mentions estimated construction details and price estimates around 7.8 million CHF.
Wait, need to check which parts are essential. As a real estate agent, focus on address, property type, key stats (size, year built), zoning info that affects value/use, maybe the development potential. Avoid too much technical jargon but include relevant specifics like COS and land area since they're standard in Swiss real estate docs.
The data also has things like heating system (mazout) but maybe that's less critical unless specified. User says to write naturally without saying "according to data". So must phrase as knowledge from experience.
Watch out for forbidden elements: no bullet points, headings, bolding. Keep under 250 words. Must flow as human-written.
Let me structure:
Start with location and building specs: street, town, size, age, status (existing). Then land details. Mention zoning rules affecting potential. Add brief note on development capacity (like how many units possible). Maybe mention the land registry number for reference. Avoid financial figures unless necessary; the problem includes sales prices but might be better left out since the user said "concise summary".
Check word count as I draft. Don't use numbers explicitly where possible. Instead of "the land measures 1200 square meters", say "terrain de 1200 m²".
Hmm, the user example response included pricing but didn't specify. Wait the original task says to summarize the given data. The price section is part of the data. But should we include it? It says "do not use meta-commentary" and the example did have it. Since the instructions ask to summarize the provided data, yes, must include price aspects even if abbreviated.
Wait, looking at the sample reply: "Les estimations financières suggèrent un projet valorisé à environ 7,8 millions..." So probably yes. However, the challenge here is condensing everything into <250 words.
Also need to confirm language: strictly French. Make sure verbs agree, proper terms like "surface utile" instead of floor area.
Avoid technical terms where possible but some are necessary (like COS). Use common real estate phrasing in Switzerland.
Important: don't include source references like Geoplanet API – omit those. Just present facts as known.
Now start drafting mentally:
Propriété à Avenches, Avenue Général Guisan 2, 1580. Maison individuelle de 111 m², 2 étages, construite en 1973. Terrain de 1200 m², catégorie "parcelle privée", sous la zone de villas. Permis existants pour une densité limitée (COS 0,2), possibilité d'un lotissement. Zonage adapté à l'habitation exclusive. Environnement stable avec accès facile. Prix indicatif : 7,8 Mio CHF. Détails techniques disponibles via documents officiels...
But wait, checking exact required content. The user provided more info on the building characteristics (heating, roof form etc.), but as a professional summary, maybe skip minor details unless critical.
Focus on what matters to buyers: location, building quality/size, land availability for future projects.
In France/Switzerland, the cos (coefficient d'occupation du sol) is crucial, same with land area. So include those.
Wait the sample response mentioned "un projet valorisé à environ 7,8 millions". So perhaps retain specific numbers when relevant.
Word count needs tight control. Let's estimate each sentence.
Final check: ensure absolutely no markdown, no bullet points, smooth transitions. Maybe two short paragraphs if over 100-150 words. Try to mimic casual yet knowledgeable tone, e.g., "il est intéressant de noter...", not robotic.
I think the main sections should be: location + property description → zoning & legal context → development potential + market value.
No extra commentary after. Start directly with the first sentence about the property's location and features.
</think>
Propriété située à Avenches, avenue Général Guisan 2 (1580), composée d’une maison individuelle de 111 m² sur deux niveaux, construite en 1973 et fonctionnelle. Le terrain de 1 200 m², classé « parcelle privée » selon le registre foncier, appartient à la zone de villas réservée à l’habitation. La construction bénéfice d’un taux de construction maximal (COS) de 0,2, autorisant jusqu’à trois étages, avec une surface totale prévue autour de 708 m² pour un éventuel lotissement. Les plans municipaux et réglementaires en vigueur confirment l’admissibilité du projet, tandis qu’un dénivelé modéré (déclivité moyenne de 8,56 %) et une altitude élevée (jusqu’à 460,5 m) offrent un emplacement avantageux. Un prix commercial estimé à près de 7,8 millions de francs suisses inclut tous les coûts associés, reflétant une opportunité d’investissement structuré avec potentiel de développement. Documents techniques complets disponibles sur demande, notamment les règlements communaux et les cartographies précises.
