diff --git a/zarrs_metadata/CHANGELOG.md b/zarrs_metadata/CHANGELOG.md
index aa696cf9..4fcf69f3 100644
--- a/zarrs_metadata/CHANGELOG.md
+++ b/zarrs_metadata/CHANGELOG.md
@@ -8,14 +8,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Changed
- - **Breaking**: Mark `GroupMetadataV3` and `ArrayMetadataV3` as non-exhaustive
- - **Breaking**: Bump MSRV to 1.77 (21 March, 2024)
+- **Breaking**: Mark `GroupMetadataV3` and `ArrayMetadataV3` as non-exhaustive
+- **Breaking**: Bump MSRV to 1.77 (21 March, 2024)
+- Refactor `GroupMetadata{V3,V2}` constructors
+  - **Breaking**: `GroupMetadataV3::new()` is now parameter free
+  - Add `GroupMetadataV2::new()`
+  - Add `GroupMetadata{V3,V2}::with_{attributes,additional_fields}()`
 
 ## [0.1.0] - 2024-09-02
 
 ### Added
- - Initial release
- - Split from the `metadata` module of `zarrs` 0.17.0-dev
+- Initial release
+- Split from the `metadata` module of `zarrs` 0.17.0-dev
 
 [unreleased]: https://github.com/LDeakin/zarrs/compare/zarrs_metadata-v0.1.0...HEAD
 [0.1.0]: https://github.com/LDeakin/zarrs/releases/tag/zarrs_metadata-v0.1.0
diff --git a/zarrs_metadata/src/v2/group.rs b/zarrs_metadata/src/v2/group.rs
index c6f141f2..026f5cee 100644
--- a/zarrs_metadata/src/v2/group.rs
+++ b/zarrs_metadata/src/v2/group.rs
@@ -18,3 +18,38 @@ pub struct GroupMetadataV2 {
     #[serde(default, flatten)]
     pub additional_fields: AdditionalFields,
 }
+
+impl Default for GroupMetadataV2 {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl GroupMetadataV2 {
+    /// Create Zarr V2 group metadata.
+    #[must_use]
+    pub fn new() -> Self {
+        Self {
+            zarr_format: monostate::MustBe!(2u64),
+            attributes: serde_json::Map::new(),
+            additional_fields: AdditionalFields::default(),
+        }
+    }
+
+    /// Set the user attributes.
+    #[must_use]
+    pub fn with_attributes(
+        mut self,
+        attributes: serde_json::Map<String, serde_json::Value>,
+    ) -> Self {
+        self.attributes = attributes;
+        self
+    }
+
+    /// Set the additional fields.
+    #[must_use]
+    pub fn with_additional_fields(mut self, additional_fields: AdditionalFields) -> Self {
+        self.additional_fields = additional_fields;
+        self
+    }
+}
diff --git a/zarrs_metadata/src/v2_to_v3.rs b/zarrs_metadata/src/v2_to_v3.rs
index 312eaded..12448017 100644
--- a/zarrs_metadata/src/v2_to_v3.rs
+++ b/zarrs_metadata/src/v2_to_v3.rs
@@ -33,10 +33,9 @@ use super::v3::array::data_type::DataTypeMetadataV3;
 #[allow(clippy::too_many_lines)]
 #[must_use]
 pub fn group_metadata_v2_to_v3(group_metadata_v2: &GroupMetadataV2) -> GroupMetadataV3 {
-    GroupMetadataV3::new(
-        group_metadata_v2.attributes.clone(),
-        group_metadata_v2.additional_fields.clone(),
-    )
+    GroupMetadataV3::new()
+        .with_attributes(group_metadata_v2.attributes.clone())
+        .with_additional_fields(group_metadata_v2.additional_fields.clone())
 }
 
 /// An error conerting Zarr V3 array metadata to V3.
diff --git a/zarrs_metadata/src/v3/group.rs b/zarrs_metadata/src/v3/group.rs
index 2375aafd..cb5dc70f 100644
--- a/zarrs_metadata/src/v3/group.rs
+++ b/zarrs_metadata/src/v3/group.rs
@@ -35,22 +35,36 @@ pub struct GroupMetadataV3 {
 
 impl Default for GroupMetadataV3 {
     fn default() -> Self {
-        Self::new(serde_json::Map::new(), AdditionalFields::default())
+        Self::new()
     }
 }
 
 impl GroupMetadataV3 {
-    /// Create group metadata.
+    /// Create Zarr V3 group metadata.
     #[must_use]
-    pub fn new(
-        attributes: serde_json::Map<String, serde_json::Value>,
-        additional_fields: AdditionalFields,
-    ) -> Self {
+    pub fn new() -> Self {
         Self {
             zarr_format: monostate::MustBe!(3u64),
             node_type: monostate::MustBe!("group"),
-            attributes,
-            additional_fields,
+            attributes: serde_json::Map::new(),
+            additional_fields: AdditionalFields::default(),
         }
     }
+
+    /// Set the user attributes.
+    #[must_use]
+    pub fn with_attributes(
+        mut self,
+        attributes: serde_json::Map<String, serde_json::Value>,
+    ) -> Self {
+        self.attributes = attributes;
+        self
+    }
+
+    /// Set the additional fields.
+    #[must_use]
+    pub fn with_additional_fields(mut self, additional_fields: AdditionalFields) -> Self {
+        self.additional_fields = additional_fields;
+        self
+    }
 }