diff --git a/cmd/lekko/init.go b/cmd/lekko/init.go
index 7fe377e1..b756ea87 100644
--- a/cmd/lekko/init.go
+++ b/cmd/lekko/init.go
@@ -301,7 +301,6 @@ func initCmd() *cobra.Command {
 			// Codegen
 			spin.Suffix = " Running codegen..."
 			spin.Start()
-			// TODO: make sure that `default` namespace exists
 			repoPath := try.To1(repo.PrepareGithubRepo())
 			if err := gen.GenNative(cmd.Context(), nlProject, lekkoPath, repoPath, gen.GenOptions{}); err != nil {
 				return errors.Wrap(err, "codegen for default namespace")
diff --git a/pkg/gen/gen.go b/pkg/gen/gen.go
index 0ac3df6b..60e2f3f8 100644
--- a/pkg/gen/gen.go
+++ b/pkg/gen/gen.go
@@ -27,6 +27,7 @@ import (
 
 	"github.com/lekkodev/cli/pkg/dotlekko"
 	"github.com/lekkodev/cli/pkg/native"
+	"github.com/lekkodev/cli/pkg/repo"
 )
 
 type GenOptions struct {
@@ -50,9 +51,24 @@ func GenNative(ctx context.Context, project *native.Project, lekkoPath, repoPath
 	if err != nil {
 		return errors.Wrap(err, "create output dir")
 	}
+	r, err := repo.NewLocal(repoPath, nil)
+	if err != nil {
+		return errors.Wrap(err, "read local repository")
+	}
 
 	if len(opts.Namespaces) == 0 {
+		// Try to generate from only existing namespaces in code
 		opts.Namespaces = try.To1(native.ListNamespaces(absLekkoPath, project.Language))
+		// If no existing namespaces in code, generate from all namespaces in config repo
+		if len(opts.Namespaces) == 0 {
+			nsMDs, err := r.ListNamespaces(ctx)
+			if err != nil {
+				return errors.Wrap(err, "list namespaces")
+			}
+			for _, nsMD := range nsMDs {
+				opts.Namespaces = append(opts.Namespaces, nsMD.Name)
+			}
+		}
 	}
 
 	switch project.Language {