diff --git a/phosphor-regulators/src/chassis.hpp b/phosphor-regulators/src/chassis.hpp
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+/**
+ * Copyright © 2020 IBM Corporation
+ *
+ * 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.
+ */
+#pragma once
+
+#include "device.hpp"
+
+#include <memory>
+#include <stdexcept>
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace phosphor::power::regulators
+{
+
+/**
+ * @class Chassis
+ *
+ * A chassis within the system.
+ *
+ * Chassis are large enclosures that can be independently powered off and on by
+ * the BMC.  Small and mid-sized systems may contain a single chassis.  In a
+ * large rack-mounted system, each drawer may correspond to a chassis.
+ *
+ * A C++ Chassis object only needs to be created if the physical chassis
+ * contains regulators that need to be configured or monitored.
+ */
+class Chassis
+{
+  public:
+    // Specify which compiler-generated methods we want
+    Chassis() = delete;
+    Chassis(const Chassis&) = delete;
+    Chassis(Chassis&&) = delete;
+    Chassis& operator=(const Chassis&) = delete;
+    Chassis& operator=(Chassis&&) = delete;
+    ~Chassis() = default;
+
+    /**
+     * Constructor.
+     *
+     * Throws an exception if any of the input parameters are invalid.
+     *
+     * @param number Chassis number within the system.  Chassis numbers start at
+     *               1 because chassis 0 represents the entire system.
+     * @param devices Devices within this chassis, if any.  The vector should
+     *                contain regulator devices and any related devices required
+     *                to perform regulator operations.
+     */
+    explicit Chassis(unsigned int number,
+                     std::vector<std::unique_ptr<Device>> devices =
+                         std::vector<std::unique_ptr<Device>>{}) :
+        number{number},
+        devices{std::move(devices)}
+    {
+        if (number < 1)
+        {
+            throw std::invalid_argument{"Invalid chassis number: " +
+                                        std::to_string(number)};
+        }
+    }
+
+    /**
+     * Returns the devices within this chassis, if any.
+     *
+     * The vector contains regulator devices and any related devices
+     * required to perform regulator operations.
+     *
+     * @return devices in chassis
+     */
+    const std::vector<std::unique_ptr<Device>>& getDevices() const
+    {
+        return devices;
+    }
+
+    /**
+     * Returns the chassis number within the system.
+     *
+     * @return chassis number
+     */
+    unsigned int getNumber() const
+    {
+        return number;
+    }
+
+  private:
+    /**
+     * Chassis number within the system.
+     *
+     * Chassis numbers start at 1 because chassis 0 represents the entire
+     * system.
+     */
+    const unsigned int number{};
+
+    /**
+     * Devices within this chassis, if any.
+     *
+     * The vector contains regulator devices and any related devices
+     * required to perform regulator operations.
+     */
+    std::vector<std::unique_ptr<Device>> devices{};
+};
+
+} // namespace phosphor::power::regulators