diff --git a/osu.Game/Online/Rooms/BeatmapAvailability.cs b/osu.Game/Online/Rooms/BeatmapAvailability.cs
new file mode 100644
index 0000000000..ca53cb2295
--- /dev/null
+++ b/osu.Game/Online/Rooms/BeatmapAvailability.cs
@@ -0,0 +1,56 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+
+namespace osu.Game.Online.Rooms
+{
+    /// <summary>
+    /// The local availability information about a certain beatmap for the client.
+    /// </summary>
+    public readonly struct BeatmapAvailability : IEquatable<BeatmapAvailability>
+    {
+        /// <summary>
+        /// The beatmap's availability state.
+        /// </summary>
+        public readonly DownloadState State;
+
+        /// <summary>
+        /// The beatmap's downloading progress, null when not in <see cref="DownloadState.Downloading"/> state.
+        /// </summary>
+        public readonly double? DownloadProgress;
+
+        /// <summary>
+        /// Constructs a new non-<see cref="DownloadState.Downloading"/> beatmap availability state.
+        /// </summary>
+        /// <param name="state">The beatmap availability state.</param>
+        /// <exception cref="ArgumentException">Throws if <see cref="DownloadState.Downloading"/> was specified in this constructor, as it has its own constructor (see <see cref="BeatmapAvailability(DownloadState, double)"/>.</exception>
+        public BeatmapAvailability(DownloadState state)
+        {
+            if (state == DownloadState.Downloading)
+                throw new ArgumentException($"{nameof(DownloadState.Downloading)} state has its own constructor, use it instead.");
+
+            State = state;
+            DownloadProgress = null;
+        }
+
+        /// <summary>
+        /// Constructs a new <see cref="DownloadState.Downloading"/>-specific beatmap availability state.
+        /// </summary>
+        /// <param name="state">The beatmap availability state (always <see cref="DownloadState.Downloading"/>).</param>
+        /// <param name="downloadProgress">The beatmap's downloading current progress.</param>
+        /// <exception cref="ArgumentException">Throws if non-<see cref="DownloadState.Downloading"/> was specified in this constructor, as they have their own constructor (see <see cref="BeatmapAvailability(DownloadState)"/>.</exception>
+        public BeatmapAvailability(DownloadState state, double downloadProgress)
+        {
+            if (state != DownloadState.Downloading)
+                throw new ArgumentException($"This is a constructor specific for {DownloadState.Downloading} state, use the regular one instead.");
+
+            State = DownloadState.Downloading;
+            DownloadProgress = downloadProgress;
+        }
+
+        public bool Equals(BeatmapAvailability other) => State == other.State && DownloadProgress == other.DownloadProgress;
+
+        public override string ToString() => $"{string.Join(", ", State, $"{DownloadProgress:0.00%}")}";
+    }
+}