diff --git a/src/Hy3Layout.cpp b/src/Hy3Layout.cpp
index e747037..b527cdc 100644
--- a/src/Hy3Layout.cpp
+++ b/src/Hy3Layout.cpp
@@ -1,3 +1,5 @@
+#include <regex>
+#include <set>
 #include <hyprland/src/Compositor.hpp>
 #include <hyprland/src/plugins/PluginAPI.hpp>
 
@@ -14,6 +16,30 @@ std::unique_ptr<HOOK_CALLBACK_FN> urgentHookPtr
 std::unique_ptr<HOOK_CALLBACK_FN> tickHookPtr
     = std::make_unique<HOOK_CALLBACK_FN>(Hy3Layout::tickHook);
 
+std::set<int> getAutotileWorkspaces() {
+	std::set<int> workspaces;
+	auto at_workspaces = HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:workspaces")->strValue;
+
+	if (at_workspaces == "all") {
+		return workspaces;
+	}
+
+	// split on space and comma
+	const std::regex regex { R"([\s,]+)" };
+	const auto begin = std::regex_token_iterator(at_workspaces.begin(), at_workspaces.end(), regex, -1);
+	const auto end = std::regex_token_iterator<std::string::iterator>();
+
+    for (auto s = begin; s != end; ++s) {
+        try {
+			workspaces.insert(std::stoi(*s));
+        } catch (...) {
+			hy3_log(ERR, "autotile:workspaces: invalid workspace id: {}", (std::string) *s);
+        }
+    }
+
+	return workspaces;
+}
+
 bool performContainment(Hy3Node& node, bool contained, CWindow* window) {
 	if (node.data.type == Hy3NodeType::Group) {
 		auto& group = node.data.as_group;
@@ -163,11 +189,13 @@ void Hy3Layout::onWindowCreatedTiling(CWindow* window) {
 		static const auto* at_ephemeral = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:ephemeral_groups")->intValue;
 		static const auto* at_trigger_width = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:trigger_width")->intValue;
 		static const auto* at_trigger_height = &HyprlandAPI::getConfigValue(PHANDLE, "plugin:hy3:autotile:trigger_height")->intValue;
+		static const auto at_workspaces = getAutotileWorkspaces();
 		// clang-format on
 
 		auto& target_group = opening_into->data.as_group;
 		if (*at_enable && opening_after != nullptr && target_group.children.size() > 1
-		    && target_group.layout != Hy3GroupLayout::Tabbed)
+		    && target_group.layout != Hy3GroupLayout::Tabbed &&
+			(at_workspaces.empty() || at_workspaces.contains(opening_into->workspace_id)))
 		{
 			auto is_horizontal = target_group.layout == Hy3GroupLayout::SplitH;
 			auto trigger = is_horizontal ? *at_trigger_width : *at_trigger_height;
diff --git a/src/main.cpp b/src/main.cpp
index 5185f2e..138ec7f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -43,6 +43,7 @@ APICALL EXPORT PLUGIN_DESCRIPTION_INFO PLUGIN_INIT(HANDLE handle) {
 	CONF("autotile:ephemeral_groups", int, 1);
 	CONF("autotile:trigger_height", int, 0);
 	CONF("autotile:trigger_width", int, 0);
+	CONF("autotile:workspaces", str, "all");
 
 #undef CONF