diff --git a/plugins/woocommerce/changelog/add-legacy-start b/plugins/woocommerce/changelog/add-legacy-start
new file mode 100644
index 00000000000..206be55753c
--- /dev/null
+++ b/plugins/woocommerce/changelog/add-legacy-start
@@ -0,0 +1,5 @@
+Significance: patch
+Type: dev
+Comment: Add start command to package.json
+
+
diff --git a/plugins/woocommerce/client/legacy/package.json b/plugins/woocommerce/client/legacy/package.json
index 58ddd7fc8c9..a5be356920a 100644
--- a/plugins/woocommerce/client/legacy/package.json
+++ b/plugins/woocommerce/client/legacy/package.json
@@ -7,7 +7,8 @@
 	"main": "Gruntfile.js",
 	"scripts": {
 		"turbo:build": "grunt assets",
-		"build": "pnpm -w exec turbo run turbo:build --filter=$npm_package_name"
+		"build": "pnpm -w exec turbo run turbo:build --filter=$npm_package_name",
+		"start": "nodemon --watch js --watch css -e js,scss --exec pnpm build"
 	},
 	"devDependencies": {
 		"@wordpress/stylelint-config": "19.1.0",
@@ -29,6 +30,7 @@
 		"grunt-sass": "3.1.0",
 		"grunt-stylelint": "0.16.0",
 		"gruntify-eslint": "5.0.0",
+		"nodemon": "^2.0.21",
 		"sass": "^1.45.0",
 		"stylelint": "13.8.0"
 	}
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 1019537f1c8..43edccf4d4f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -2056,6 +2056,7 @@ importers:
       grunt-sass: 3.1.0
       grunt-stylelint: 0.16.0
       gruntify-eslint: 5.0.0
+      nodemon: ^2.0.21
       sass: ^1.45.0
       stylelint: 13.8.0
     devDependencies:
@@ -2078,6 +2079,7 @@ importers:
       grunt-sass: 3.1.0_grunt@1.3.0
       grunt-stylelint: 0.16.0_stylelint@13.8.0
       gruntify-eslint: 5.0.0_grunt@1.3.0
+      nodemon: 2.0.21
       sass: 1.49.9
       stylelint: 13.8.0
 
@@ -24052,6 +24054,18 @@ packages:
     dependencies:
       ms: 2.1.3
 
+  /debug/3.2.7_supports-color@5.5.0:
+    resolution: {integrity: sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ==}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+    dependencies:
+      ms: 2.1.3
+      supports-color: 5.5.0
+    dev: true
+
   /debug/4.1.1:
     resolution: {integrity: sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==}
     deprecated: Debug versions >=3.2.0 <3.2.7 || >=4 <4.3.1 have a low-severity ReDos regression when used in a Node.js environment. It is recommended you upgrade to 3.2.7 or 4.3.1. (https://github.com/visionmedia/debug/issues/797)
@@ -28948,6 +28962,10 @@ packages:
     resolution: {integrity: sha1-xg7taebY/bazEEofy8ocGS3FtQE=}
     dev: true
 
+  /ignore-by-default/1.0.1:
+    resolution: {integrity: sha512-Ius2VYcGNk7T90CppJqcIkS5ooHUZyIQK+ClZfMfMNFEF9VSE73Fq+906u/CWu92x4gzZMWOwfFYckPObzdEbA==}
+    dev: true
+
   /ignore-emit-webpack-plugin/2.0.6:
     resolution: {integrity: sha512-/zC18RWCC2wz4ZwnS4UoujGWzvSKy28DLjtE+jrGBOXej6YdmityhBDzE8E0NlktEqi4tgdNbydX8B6G4haHSQ==}
     dev: true
@@ -34478,6 +34496,30 @@ packages:
       is: 3.3.0
     dev: false
 
+  /nodemon/2.0.21:
+    resolution: {integrity: sha512-djN/n2549DUtY33S7o1djRCd7dEm0kBnj9c7S9XVXqRUbuggN1MZH/Nqa+5RFQr63Fbefq37nFXAE9VU86yL1A==}
+    engines: {node: '>=8.10.0'}
+    hasBin: true
+    dependencies:
+      chokidar: 3.5.3
+      debug: 3.2.7_supports-color@5.5.0
+      ignore-by-default: 1.0.1
+      minimatch: 3.1.2
+      pstree.remy: 1.1.8
+      semver: 5.7.1
+      simple-update-notifier: 1.1.0
+      supports-color: 5.5.0
+      touch: 3.1.0
+      undefsafe: 2.0.5
+    dev: true
+
+  /nopt/1.0.10:
+    resolution: {integrity: sha512-NWmpvLSqUrgrAC9HCuxEvb+PSloHpqVu+FqcO4eeF2h5qYRhA7ev6KvelyQAKtegUbC6RypJnlEOhd8vloNKYg==}
+    hasBin: true
+    dependencies:
+      abbrev: 1.1.1
+    dev: true
+
   /nopt/3.0.6:
     resolution: {integrity: sha512-4GUt3kSEYmk4ITxzB/b9vaIDfUVWN/Ml1Fwl11IlnIG2iaJ9O6WXZ9SrYM9NLI8OCBieN2Y8SWC2oJV0RQ7qYg==}
     hasBin: true
@@ -36783,6 +36825,10 @@ packages:
   /psl/1.8.0:
     resolution: {integrity: sha512-RIdOzyoavK+hA18OGGWDqUTsCLhtA7IcZ/6NCs4fFJaHBDab+pDDmDIByWFRQJq2Cd7r1OoQxBGKOaztq+hjIQ==}
 
+  /pstree.remy/1.1.8:
+    resolution: {integrity: sha512-77DZwxQmxKnu3aR542U+X8FypNzbfJ+C5XQDk3uWjWxn6151aIMGthWYRXTqT1E5oJvg+ljaa2OJi+VfvCOQ8w==}
+    dev: true
+
   /public-encrypt/4.0.3:
     resolution: {integrity: sha512-zVpa8oKZSz5bTMTFClc1fQOnyyEzpl5ozpi1B5YcvBrdohMjH2rfsBtyXcuNuwjsDIXmBYlF2N5FlJYhR29t8Q==}
     dependencies:
@@ -39385,6 +39431,13 @@ packages:
     dependencies:
       is-arrayish: 0.3.2
 
+  /simple-update-notifier/1.1.0:
+    resolution: {integrity: sha512-VpsrsJSUcJEseSbMHkrsrAVSdvVS5I96Qo1QAQ4FxQ9wXFcB+pjj7FB7/us9+GcgfW4ziHtYMc1J0PLczb55mg==}
+    engines: {node: '>=8.10.0'}
+    dependencies:
+      semver: 7.0.0
+    dev: true
+
   /sirv/1.0.19:
     resolution: {integrity: sha512-JuLThK3TnZG1TAKDwNIqNq6QA2afLOCcm+iE8D1Kj3GA40pSPsxQjjJl0J8X3tsR7T+CP1GavpzLwYkgVLWrZQ==}
     engines: {node: '>= 10'}
@@ -41147,6 +41200,13 @@ packages:
     engines: {node: '>=6'}
     dev: true
 
+  /touch/3.1.0:
+    resolution: {integrity: sha512-WBx8Uy5TLtOSRtIq+M03/sKDrXCLHxwDcquSP2c43Le03/9serjQBIztjRz6FkJez9D/hleyAXTBGLwwZUw9lA==}
+    hasBin: true
+    dependencies:
+      nopt: 1.0.10
+    dev: true
+
   /tough-cookie/2.5.0:
     resolution: {integrity: sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==}
     engines: {node: '>=0.8'}
@@ -41757,6 +41817,10 @@ packages:
     engines: {node: '>=0.10.0'}
     dev: true
 
+  /undefsafe/2.0.5:
+    resolution: {integrity: sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==}
+    dev: true
+
   /underscore.string/3.3.6:
     resolution: {integrity: sha512-VoC83HWXmCrF6rgkyxS9GHv8W9Q5nhMKho+OadDJGzL2oDYbYEppBaCMH6pFlwLeqj2QS+hhkw2kpXkSdD1JxQ==}
     dependencies: