diff --git a/typescript/sdk/src/ism/multisig.ts b/typescript/sdk/src/ism/multisig.ts
new file mode 100644
index 0000000000..2846f006ce
--- /dev/null
+++ b/typescript/sdk/src/ism/multisig.ts
@@ -0,0 +1,27 @@
+import { objFilter, objMap } from '@hyperlane-xyz/utils';
+
+import { ChainMap, ChainName } from '../types';
+
+import { MultisigConfig, MultisigIsmConfig } from './types';
+
+// build multisigIsmConfig from multisigConfig
+// eg. for { sepolia (local), arbitrumsepolia, scrollsepolia }
+// arbitrumsepolia => Ism, scrollsepolia => Ism
+export const buildMultisigIsmConfigs = (
+  type: MultisigIsmConfig['type'],
+  local: ChainName,
+  chains: ChainName[],
+  multisigConfigs: ChainMap<MultisigConfig>,
+): ChainMap<MultisigIsmConfig> => {
+  return objMap(
+    objFilter(
+      multisigConfigs,
+      (chain, config): config is MultisigConfig =>
+        chain !== local && chains.includes(chain),
+    ),
+    (_, config) => ({
+      ...config,
+      type,
+    }),
+  );
+};