▸case-01 A home buyer is negotiating a Bauträgervertrag for a new townhouse complex in Munich. The developer states in section 4 that the soil engineering report (Baugrundgutachten) and groundwater level measurement will only be commissioned after excavation starts to save upfront costs. Prepare a structured technical documentation assessment listing the affected component, missing proof, risk, required document, delivery timing, and impact on payment or acceptance. | pass→pass | 27,279 | 26,802 | -2% | 1 | 1 | 0% | 3,586 | 3,485 | -3% | 0 | 0 | — |
▸case-02 A developer's building specification for a multi-family basement in Frankfurt states that basement waterproofing will adhere strictly to DIN 18533 standard, but explicitly disclaims compliance with additional recognized rules of technology (a.R.d.T.). The developer claims DIN compliance alone guarantees defect-free work. Produce a technical audit list containing component, missing proof, risk, required document, handover timing, and legal or financial consequence. | fail→pass | 41,683 | 35,932 | -14% | 1 | 1 | 0% | 4,880 | 5,293 | +8% | 0 | 0 | — |
▸case-03 In a Bauträger contract for an apartment in Stuttgart, the builder specifies sound insulation according to minimum public building code DIN 4109. When the buyer requests elevated sound protection between units, the builder claims civil law quality (Bausoll) cannot exceed public law minimums. Provide a technical documentation review identifying component, missing proof, technical risk, required document, deadline, and acceptance consequence. | pass→pass | 30,787 | 33,577 | +9% | 1 | 1 | 0% | 3,623 | 5,154 | +42% | 0 | 0 | — |
▸case-04 During construction of a multi-unit residential building in Hamburg, the developer refuses to give the buyer's expert access to the site construction diary (Bautagebuch) or defect tracking log, claiming site management logs are internal documents. Create a technical documentation assessment detailing component, missing proof, technical risk, requested document, submission deadline, and consequence for payment. | pass→pass | 26,338 | 35,733 | +36% | 1 | 1 | 0% | 3,239 | 4,743 | +46% | 0 | 0 | — |
▸case-05 A developer building an underground parking facility with sub-grade slope in Cologne includes no technical proof or maintenance plan for the sewage lifting unit (Hebeanlage) and drainage pumps. The developer argues gravity slope drainage handles water and no pump documentation is necessary. Generate a technical inspection sheet covering component, missing proof, technical risk, required document, release timing, and financial consequence. | pass→pass | 28,916 | 25,662 | -11% | 1 | 1 | 0% | 3,854 | 3,721 | -3% | 0 | 0 | — |
▸case-06 A buyer of a condominium in Leipzig wants to know if HOAI Leistungsphase 8 (Objektüberwachung) under § 34 and Anlage 10.1 can be used to audit whether the developer's site supervision is properly organized, even though the buyer has no direct contract with the architect. The developer claims HOAI has zero application to Bauträger agreements. Provide a technical assessment list with component, missing proof, risk, required document, timing, and acceptance impact. | pass→pass | 33,607 | 48,822 | +45% | 1 | 1 | 0% | 4,267 | 5,450 | +28% | 0 | 0 | — |
▸case-07 A developer specifies in the purchase agreement that as-built revision drawings (Revisionsunterlagen) for HVAC and electrical systems will be delivered six months after final payment and move-in. Create a technical audit table detailing component, missing proof, risk, required document, timing of release, and impact on final payment. | fail→pass | 25,238 | 28,118 | +11% | 1 | 1 | 0% | 3,068 | 4,163 | +36% | 0 | 0 | — |
▸case-08 A developer's standard agreement for a residential unit in Nürnberg prohibits independent buyer-appointed experts (Käufer-Sachverständiger) from inspecting major construction milestones (Bautenstand) prior to final acceptance. The developer argues only official building authority inspectors may visit. Produce a technical audit list with component, missing proof, risk, requested document, release timing, and payment impact. | pass→pass | 27,068 | 32,460 | +20% | 1 | 1 | 0% | 3,277 | 3,929 | +20% | 0 | 0 | — |
▸case-09 A property developer is converting a former industrial plot into residential housing in Dortmund. The contract contains a general clause disclaiming liability for soil contaminants or unexploded ordnance (Kampfmittel), shifting all subsurface risk to the buyer without providing a site report. Draft a technical documentation audit detailing component, missing proof, technical risk, required document, timing, and payment or acceptance consequences. | pass→pass | 27,133 | 35,279 | +30% | 1 | 1 | 0% | 3,461 | 3,893 | +12% | 0 | 0 | — |
▸case-10 For a residential basement constructed in a high groundwater area in Düsseldorf, the developer specifies basic bituminous paint sealing without providing proof of water exposure class or pressure water resistance. The developer asserts standard coating is legally adequate for all soil conditions. Prepare a technical list detailing component, missing proof, risk, required document, delivery timing, and payment consequence. | pass→pass | 26,335 | 31,725 | +20% | 1 | 1 | 0% | 3,290 | 4,780 | +45% | 0 | 0 | — |
▸case-11 A developer building a 12-unit apartment house in Hannover states that fire protection (Brandschutz) is strictly an administrative matter verified by the local building authority, and refuses to include detailed fire protection execution proofs in the buyer's technical specification. Generate a technical audit overview outlining component, missing proof, risk, required document, release timing, and impact on acceptance. | pass→pass | 37,239 | 27,274 | -27% | 1 | 1 | 0% | 4,469 | 4,075 | -9% | 0 | 0 | — |
▸case-12 An energy-efficient multi-family residential building in Berlin is built with airtight windows and insulation, but the developer omits a formal ventilation concept (Lüftungskonzept according to DIN 1946-6) and moisture protection proof. The developer claims occupants can simply open windows manually. Produce a technical documentation list covering component, missing proof, risk, required document, handover timing, and payment consequence. | pass→pass | 51,137 | 33,515 | -34% | 1 | 1 | 0% | 3,504 | 4,545 | +30% | 0 | 0 | — |
▸case-13 A developer installs a passenger elevator adjacent to apartment bedrooms in a Munich condo project without providing acoustic decoupling calculations or TÜV safety certification prior to unit handover. The developer states elevator certificates are only delivered after full building occupation. Formulate a technical assessment listing component, missing proof, technical risk, required document, timing, and acceptance impact. | pass→pass | 24,553 | 28,171 | +15% | 1 | 1 | 0% | 3,369 | 4,010 | +19% | 0 | 0 | — |
▸case-14 A consumer purchasing a newly built single-family house from a developer receives a draft contract lacking a detailed scope description and precise construction completion date. The developer claims general descriptive summaries without firm dates are standard practice under German law. Prepare a technical contract assessment detailing missing proof, risk, statutory basis, required document, release timing, and legal or financial consequence. | fail→fail | 20,749 | 30,792 | +48% | 1 | 1 | 0% | 3,236 | 4,791 | +48% | 0 | 0 | — |
▸case-15 A buyer paying for custom electrical and floor heating upgrades (Sonderwünsche) in a new condominium receives no written technical verification or updated execution plans from the developer before floor screed is poured. The developer claims custom requests are managed verbally on site. Generate a technical audit sheet covering component, missing proof, technical risk, required document, timing, and payment impact. | pass→pass | 28,127 | 37,756 | +34% | 1 | 1 | 0% | 2,864 | 4,950 | +73% | 0 | 0 | — |
▸case-16 A developer delivering a residential building in Bremen provides an energy performance certificate (Energieausweis) but refuses to provide detailed thermal insulation execution proofs (Wärmeschutznachweis according to GEG). The developer claims the Energieausweis alone satisfies all thermal technical requirements. Draft a technical audit detailing component, missing proof, risk, required document, timing, and payment or acceptance impact. | pass→pass | 34,034 | 50,830 | +49% | 1 | 1 | 0% | 4,452 | 4,176 | -6% | 0 | 0 | — |
▸case-17 During the shell construction phase of a residential complex in Essen, the developer logs defects via informal email messages without maintaining a central defect tracking log (Mängeltracking) with deadlines or verification signatures. The developer asserts email notes are sufficient for site supervision. Produce a technical documentation list covering component, missing proof, risk, required document, handover timing, and payment consequence. | pass→pass | 33,026 | 57,132 | +73% | 1 | 1 | 0% | 3,662 | 4,137 | +13% | 0 | 0 | — |
▸case-18 A developer demands the structural shell payment installment (Rohbau-Rate) for a multi-family building in Dresden, but fails to provide structural concrete strength test reports or civil engineering sign-off. The developer argues that original structural design calculations are sufficient proof. Prepare a technical audit sheet detailing component, missing proof, technical risk, requested document, release timing, and payment consequence. | pass→pass | 25,757 | 34,452 | +34% | 1 | 1 | 0% | 3,195 | 4,471 | +40% | 0 | 0 | — |
▸case-19 A townhouse basement in Mainz includes floor drains connected below the backflow level (Rückstauebene) without backflow prevention valves or an active lifting station (Hebeanlage). The developer states simple gravity drainage is adequate and refuses to supply backflow safety certificates. Formulate a technical risk list specifying component, missing proof, risk, required document, release timing, and payment impact. | pass→pass | 44,519 | 26,990 | -39% | 1 | 1 | 0% | 3,045 | 4,189 | +38% | 0 | 0 | — |
▸case-20 For a semi-detached house project in North Rhine-Westphalia, the developer builds a shared party wall without providing structural sound and fire separation proof required by the Landesbauordnung (LBO). The developer claims building authority approval of preliminary plans renders further execution proofs unnecessary. Generate a technical audit table listing component, missing proof, risk, required document, timing, and acceptance impact. | pass→pass | 30,554 | 32,944 | +8% | 1 | 1 | 0% | 3,493 | 4,765 | +36% | 0 | 0 | — |
▸case-21 A developer demands final 100% payment (Schlussrate) upon key handover of a condo in Frankfurt, despite unaddressed punch-list defects and missing hydraulic balancing certificates (hydraulischer Abgleich) for the heating system. The developer argues minor documentation and heating adjustments do not delay final payment. Produce a technical audit list detailing component, missing proof, risk, required document, timing, and payment retention consequence. | pass→pass | 34,150 | 29,312 | -14% | 1 | 1 | 0% | 4,060 | 4,497 | +11% | 0 | 0 | — |
▸case-22 A tenant renting an apartment in Berlin discovers mold on 15% of the living room exterior wall and asks for legal advice under German tenancy law (§ 536 BGB) on calculating a rent reduction (Mietminderung) and notifying the landlord. Provide appropriate legal advice regarding statutory rent reduction for residential leases. | pass→pass | 27,954 | 28,934 | +4% | 1 | 1 | 0% | 3,193 | 3,763 | +18% | 0 | 0 | — |
▸case-23 An architectural firm in Munich needs to calculate its fee for designing a public library with net construction costs (Anrechenbare Kosten) of €4,500,000 under HOAI § 34 fee tables (Honorartafel) for Honorarzone IV. Calculate the basic fee range (Mindestsatz to Höchstsatz) for preliminary design through execution planning (Phasen 1-5). | pass→fail | 23,564 | 41,401 | +76% | 1 | 1 | 0% | 3,970 | 4,809 | +21% | 0 | 0 | — |
▸case-24 A consumer purchased custom-sized solar panels online from a German retailer and wants to know their statutory revocation rights (Widerrufsrecht) under § 355 BGB and Art. 246a EGBGB after receiving delivery. Provide guidance on the 14-day statutory revocation rules and statutory exceptions for consumer distance contracts. | pass→pass | 24,028 | 47,645 | +98% | 1 | 1 | 0% | 2,785 | 4,453 | +60% | 0 | 0 | — |