Hedonic Gradient Boosted Decision Tree ensembles trained on official Land Register closing transactions (VZD NĪTIS) and calibrated for bailiff liquidation discount spreads.
Relative econometric influence of engineered property features on valuation error (out-of-sample permutation loss). Micro-neighborhood location and floor area explain over 48% of cross-sectional property price variance in Latvia.
The valuation engine uses dual-quantile Gradient Boosted Decision Trees (HistGradientBoostingRegressor) to model non-linear price elasticity while providing robust, distribution-free confidence intervals.
Latvian judicial auctions (izsoles.ta.gov.lv) operate under statutory discount rules that create substantial arbitrage spreads:
Statutory opening bid begins at exactly 70% of certified bailiff appraisal value.
Statutory opening bid drops to 75% of 1st round (= 52.5% of original certified appraisal).
Average hammer premium over opening bid for contested suburban lots; rural land often closes at starting bid.
Latvia experienced profound macroeconomic shifts over recent cycles, including a ~30% cumulative surge in replacement costs following the 2021–2023 inflationary spike. Treating historical transactions from 2023 or 2024 as identical to 2026 would severely penalize current fair-market valuations.
Transactions encoded as continuous floats (year + (month-1)/12 + day/365), capturing month-by-month appreciation trends.
Enforces monotonic_cst = +1 on time, preventing isolated low-priced sales in small samples from artificially dragging down future valuations.
All active listings and auctions evaluate at today's replacement cost level rather than depressed historical benchmarks.
In real estate econometrics, auctions that conclude with zero bids (auction_status == "NENOTIKUSI") provide empirical right-censored valuation ceilings: fair market clearing value is strictly lower than the opening price (P_FMV < P_start). When no market participant is willing to bid at the starting price, that price acts as a definitive resistance ceiling for that property series and micro-location.
Properties where buyers refused to bid at initial appraiser appraisals, setting local micro-location market limits.
By statutory law, failed 1st round auctions must drop by 25%. AVM incorporates this discounted proxy into the training pool.
Hedonic predictions are calibrated against local zero-bid thresholds to penalize listings priced above failed auction levels.
Test property attributes live against model coefficients and neighborhood baselines.
For properties combining living space, land plots, and forest parcels, intrinsic value is the sum of component parts benchmarked against local comps.
Points below the dashed diagonal equilibrium line represent undervalued assets trading at a discount. Click any point to inspect and locate on the GIS map.
Complete audit log of ingested open data sources, bronze partitions, silver normalization tables, scheduled cadences, and gold GIS deliverables across Latvia.
Immutable raw ingestions partitioned by reference_date=YYYY-MM-DD/ with cryptographic SHA-256 manifests. Zero history mutation.
Schema-validated, deduplicated tables in Apache Parquet. Reprojected to official metric CRS EPSG:3059 (LKS-92) with offline address geocoding.
Feature-engineered deal opportunities, ML AVM valuation models, pre-styled OGC GeoPackage (latvia_real_estate.gpkg), and Leaflet Web GIS.
Click any dataset row to inspect partition history, record growth chart, documents, and reingestion cadence.
| Dataset Identifier / Name | Source Portal | Records Ingested | Documents / PDFs | Last Ingested | Scheduled Check | Next Reingestion | Status |
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Automated detection and AI diagnostic review of significant price deviations, parsing errors, decimal comma artifacts, and undivided co-ownership.
| Deal ID / Source | Title / Subject | Anomaly Category | Original → Corrected | AI Diagnostic Explanation | Rule Fix & IDE Prompt | Status |
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Chronological history of automated lakehouse tasks and stage completions.
| Reference Date | Records | Docs / PDFs | Size | Status |
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Configure price, commute distance, asset categories, legal parameters & Boolean logic