diff --git a/failsafeloggers/builder.cpp b/failsafeloggers/builder.cpp
new file mode 100644
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--- /dev/null
+++ b/failsafeloggers/builder.cpp
@@ -0,0 +1,67 @@
+/**
+ * Copyright 2017 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "failsafeloggers/builder.hpp"
+
+#include "conf.hpp"
+#include "failsafeloggers/failsafe_logger.hpp"
+#include "failsafeloggers/failsafe_logger_utility.hpp"
+
+#include <algorithm>
+#include <iostream>
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+namespace pid_control
+{
+
+void buildFailsafeLoggers(
+    const std::unordered_map<int64_t, std::shared_ptr<ZoneInterface>>& zones,
+    const size_t logMaxCountPerSecond /* = 20 */)
+{
+    zoneIdToFailsafeLogger =
+        std::unordered_map<int64_t,
+                           std::shared_ptr<pid_control::FailsafeLogger>>();
+    sensorNameToZoneId =
+        std::unordered_map<std::string, std::vector<int64_t>>();
+    for (const auto& zoneIdToZone : zones)
+    {
+        int64_t zoneId = zoneIdToZone.first;
+        // Create a failsafe logger for each zone.
+        zoneIdToFailsafeLogger[zoneId] = std::make_shared<FailsafeLogger>(
+            logMaxCountPerSecond, zoneIdToZone.second->getFailSafeMode());
+        // Build the sensor-zone topology map.
+        std::vector<std::string> sensorNames =
+            zoneIdToZone.second->getSensorNames();
+        for (const std::string& sensorName : sensorNames)
+        {
+            if (std::find(sensorNameToZoneId[sensorName].begin(),
+                          sensorNameToZoneId[sensorName].end(), zoneId) ==
+                sensorNameToZoneId[sensorName].end())
+            {
+                sensorNameToZoneId[sensorName].push_back(zoneId);
+            }
+        }
+        std::cerr << "Build failsafe logger for Zone " << zoneId
+                  << " with initial "
+                  << "failsafe mode: " << zoneIdToZone.second->getFailSafeMode()
+                  << "\n";
+    }
+}
+
+} // namespace pid_control