diff --git a/backend/pashub_fetcher/pashub_client.py b/backend/pashub_fetcher/pashub_client.py
index e10fbec7b..a3fa07714 100644
--- a/backend/pashub_fetcher/pashub_client.py
+++ b/backend/pashub_fetcher/pashub_client.py
@@ -29,6 +29,12 @@ class DownloadedFiles(NamedTuple):
     other: List[DownloadedFile]
 
 
+class RdSapSummary(NamedTuple):
+    pre_sap_rating: Optional[float]
+    pre_current_co2_emissions: Optional[float]
+    pre_current_energy_consumption: Optional[float]
+
+
 class UnauthorizedError(Exception):
     pass
 
@@ -126,6 +132,9 @@ class PashubClient:
             )
             return None
 
+    def get_rdsap_summary_by_job_id(self, job_id: str) -> RdSapSummary:
+        raise NotImplementedError
+
     def _group_into_core_and_other_files(
         self,
         files: List[EvidenceFileData],
diff --git a/backend/pashub_fetcher/tests/test_pashub_client.py b/backend/pashub_fetcher/tests/test_pashub_client.py
index 214a14a6a..4f6139530 100644
--- a/backend/pashub_fetcher/tests/test_pashub_client.py
+++ b/backend/pashub_fetcher/tests/test_pashub_client.py
@@ -1,6 +1,9 @@
 # pyright: reportPrivateUsage=false
-from typing import Optional
-from unittest.mock import patch
+from typing import Any, Optional
+from unittest.mock import MagicMock, patch
+
+import pytest
+import requests
 
 from backend.pashub_fetcher.core_files import CoreFiles
 from backend.pashub_fetcher.evidence_file_data import EvidenceFileData
@@ -9,6 +12,8 @@ from backend.pashub_fetcher.pashub_client import (
     DownloadedFile,
     DownloadedFiles,
     PashubClient,
+    RdSapSummary,
+    UnauthorizedError,
 )
 
 
@@ -278,3 +283,43 @@ def test_get_evidence_files_by_job_id_downloads_other_files_when_include_other_t
     # Assert
     assert [df.file_path for df in result.core] == ["/tmp/SiteNote_001.pdf"]
     assert [df.file_path for df in result.other] == ["/tmp/unknown_doc.pdf"]
+
+
+# ---------------------------------------------------------------------------
+# get_rdsap_summary_by_job_id
+# ---------------------------------------------------------------------------
+
+
+def make_response(
+    status_code: int = 200,
+    payload: Optional[dict[str, Any]] = None,
+    raise_on_status: Optional[Exception] = None,
+) -> MagicMock:
+    response = MagicMock()
+    response.status_code = status_code
+    response.json.return_value = payload if payload is not None else {}
+    if raise_on_status is not None:
+        response.raise_for_status.side_effect = raise_on_status
+    return response
+
+
+def test_get_rdsap_summary_maps_pre_performance_fields() -> None:
+    # Arrange
+    client = make_client()
+    payload = {
+        "preSapRating": 78.00,
+        "preSapBand": 50,
+        "preCurrentEnergyConsumption": 117.00,
+        "preCurrentCo2Emissions": 1.70,
+    }
+
+    # Act
+    client.session.get = MagicMock(return_value=make_response(payload=payload))
+    result = client.get_rdsap_summary_by_job_id("job-1")
+
+    # Assert
+    assert result == RdSapSummary(
+        pre_sap_rating=78.00,
+        pre_current_co2_emissions=1.70,
+        pre_current_energy_consumption=117.00,
+    )