diff --git a/tradein-mvp/backend/app/services/estimator.py b/tradein-mvp/backend/app/services/estimator.py
index aa6257e3..1073534a 100644
--- a/tradein-mvp/backend/app/services/estimator.py
+++ b/tradein-mvp/backend/app/services/estimator.py
@@ -347,10 +347,13 @@ def _fetch_analogs(
                 -- термом) PostgreSQL трактует имя как входную колонку listings,
                 -- которой нет → "column distance_m does not exist". Инлайним ST_Distance.
                 ST_Distance(geom::geography, ST_MakePoint(:lon, :lat)::geography) / 1000.0
-                + CASE WHEN :target_year IS NOT NULL AND year_built IS NOT NULL
-                       THEN abs(year_built - :target_year) / 12.0 ELSE 0 END
-                + CASE WHEN :target_house_type IS NOT NULL AND house_type IS NOT NULL
-                            AND house_type <> :target_house_type
+                -- CAST обязателен: target_year / target_house_type приходят NULL
+                -- без типа → PostgreSQL "could not determine data type of parameter"
+                -- (AmbiguousParameter). Явный тип снимает неоднозначность.
+                + CASE WHEN CAST(:target_year AS integer) IS NOT NULL AND year_built IS NOT NULL
+                       THEN abs(year_built - CAST(:target_year AS integer)) / 12.0 ELSE 0 END
+                + CASE WHEN CAST(:target_house_type AS text) IS NOT NULL AND house_type IS NOT NULL
+                            AND house_type <> CAST(:target_house_type AS text)
                        THEN 1.5 ELSE 0 END
             )
             LIMIT 50