diff --git a/cli/core/install.go b/cli/core/install.go
index ce107ccdb41..392b81a28a5 100644
--- a/cli/core/install.go
+++ b/cli/core/install.go
@@ -33,6 +33,7 @@ import (
 
 var (
 	postInstallFlags arguments.PostInstallFlags
+	noOverwrite      bool
 )
 
 func initInstallCommand() *cobra.Command {
@@ -54,6 +55,7 @@ func initInstallCommand() *cobra.Command {
 		},
 	}
 	postInstallFlags.AddToCommand(installCommand)
+	installCommand.Flags().BoolVar(&noOverwrite, "no-overwrite", false, tr("Do not overwrite already installed platforms."))
 	return installCommand
 }
 
@@ -74,6 +76,7 @@ func runInstallCommand(cmd *cobra.Command, args []string) {
 			Architecture:    platformRef.Architecture,
 			Version:         platformRef.Version,
 			SkipPostInstall: postInstallFlags.DetectSkipPostInstallValue(),
+			NoOverwrite:     noOverwrite,
 		}
 		_, err := core.PlatformInstall(context.Background(), platformInstallRequest, output.ProgressBar(), output.TaskProgress())
 		if err != nil {
diff --git a/commands/core/install.go b/commands/core/install.go
index 4ee03deabe0..42c4db2935d 100644
--- a/commands/core/install.go
+++ b/commands/core/install.go
@@ -17,6 +17,7 @@ package core
 
 import (
 	"context"
+	"fmt"
 
 	"github.com/arduino/arduino-cli/arduino"
 	"github.com/arduino/arduino-cli/arduino/cores"
@@ -44,37 +45,43 @@ func PlatformInstall(ctx context.Context, req *rpc.PlatformInstallRequest,
 		PlatformArchitecture: req.Architecture,
 		PlatformVersion:      version,
 	}
-	platform, tools, err := pm.FindPlatformReleaseDependencies(ref)
+	platformRelease, tools, err := pm.FindPlatformReleaseDependencies(ref)
 	if err != nil {
 		return nil, &arduino.PlatformNotFoundError{Platform: ref.String(), Cause: err}
 	}
 
-	didInstall, err := installPlatform(pm, platform, tools, downloadCB, taskCB, req.GetSkipPostInstall())
-	if err != nil {
-		return nil, err
+	// Prerequisite checks before install
+	if platformRelease.IsInstalled() {
+		taskCB(&rpc.TaskProgress{Name: tr("Platform %s already installed", platformRelease), Completed: true})
+		return &rpc.PlatformInstallResponse{}, nil
 	}
 
-	if didInstall {
-		if err := commands.Init(&rpc.InitRequest{Instance: req.Instance}, nil); err != nil {
-			return nil, err
+	if req.GetNoOverwrite() {
+		if installed := pm.GetInstalledPlatformRelease(platformRelease.Platform); installed != nil {
+			return nil, fmt.Errorf("%s: %s",
+				tr("Platform %s already installed", installed),
+				tr("could not overwrite"))
 		}
 	}
 
+	if err := installPlatform(pm, platformRelease, tools, downloadCB, taskCB, req.GetSkipPostInstall()); err != nil {
+		return nil, err
+	}
+
+	if err := commands.Init(&rpc.InitRequest{Instance: req.Instance}, nil); err != nil {
+		return nil, err
+	}
+
 	return &rpc.PlatformInstallResponse{}, nil
 }
 
 func installPlatform(pm *packagemanager.PackageManager,
 	platformRelease *cores.PlatformRelease, requiredTools []*cores.ToolRelease,
 	downloadCB rpc.DownloadProgressCB, taskCB rpc.TaskProgressCB,
-	skipPostInstall bool) (bool, error) {
+	skipPostInstall bool) error {
 	log := pm.Log.WithField("platform", platformRelease)
 
 	// Prerequisite checks before install
-	if platformRelease.IsInstalled() {
-		log.Warn("Platform already installed")
-		taskCB(&rpc.TaskProgress{Name: tr("Platform %s already installed", platformRelease), Completed: true})
-		return false, nil
-	}
 	toolsToInstall := []*cores.ToolRelease{}
 	for _, tool := range requiredTools {
 		if tool.IsInstalled() {
@@ -89,18 +96,18 @@ func installPlatform(pm *packagemanager.PackageManager,
 	taskCB(&rpc.TaskProgress{Name: tr("Downloading packages")})
 	for _, tool := range toolsToInstall {
 		if err := downloadTool(pm, tool, downloadCB); err != nil {
-			return false, err
+			return err
 		}
 	}
 	if err := downloadPlatform(pm, platformRelease, downloadCB); err != nil {
-		return false, err
+		return err
 	}
 	taskCB(&rpc.TaskProgress{Completed: true})
 
 	// Install tools first
 	for _, tool := range toolsToInstall {
 		if err := commands.InstallToolRelease(pm, tool, taskCB); err != nil {
-			return false, err
+			return err
 		}
 	}
 
@@ -112,8 +119,8 @@ func installPlatform(pm *packagemanager.PackageManager,
 		taskCB(&rpc.TaskProgress{Name: tr("Installing platform %s", platformRelease)})
 	} else {
 		// A platform with a different version is already installed
-		log.Info("Upgrading platform " + installed.String())
-		taskCB(&rpc.TaskProgress{Name: tr("Upgrading platform %[1]s with %[2]s", installed, platformRelease)})
+		log.Info("Replacing platform " + installed.String())
+		taskCB(&rpc.TaskProgress{Name: tr("Replacing platform %[1]s with %[2]s", installed, platformRelease)})
 		platformRef := &packagemanager.PlatformReference{
 			Package:              platformRelease.Platform.Package.Name,
 			PlatformArchitecture: platformRelease.Platform.Architecture,
@@ -126,14 +133,14 @@ func installPlatform(pm *packagemanager.PackageManager,
 		var err error
 		_, installedTools, err = pm.FindPlatformReleaseDependencies(platformRef)
 		if err != nil {
-			return false, &arduino.NotFoundError{Message: tr("Can't find dependencies for platform %s", platformRef), Cause: err}
+			return &arduino.NotFoundError{Message: tr("Can't find dependencies for platform %s", platformRef), Cause: err}
 		}
 	}
 
 	// Install
 	if err := pm.InstallPlatform(platformRelease); err != nil {
 		log.WithError(err).Error("Cannot install platform")
-		return false, &arduino.FailedInstallError{Message: tr("Cannot install platform"), Cause: err}
+		return &arduino.FailedInstallError{Message: tr("Cannot install platform"), Cause: err}
 	}
 
 	// If upgrading remove previous release
@@ -151,7 +158,7 @@ func installPlatform(pm *packagemanager.PackageManager,
 				taskCB(&rpc.TaskProgress{Message: tr("Error rolling-back changes: %s", err)})
 			}
 
-			return false, &arduino.FailedInstallError{Message: tr("Cannot upgrade platform"), Cause: uninstallErr}
+			return &arduino.FailedInstallError{Message: tr("Cannot upgrade platform"), Cause: uninstallErr}
 		}
 
 		// Uninstall unused tools
@@ -177,5 +184,5 @@ func installPlatform(pm *packagemanager.PackageManager,
 
 	log.Info("Platform installed")
 	taskCB(&rpc.TaskProgress{Message: tr("Platform %s installed", platformRelease), Completed: true})
-	return true, nil
+	return nil
 }
diff --git a/commands/core/upgrade.go b/commands/core/upgrade.go
index a0c391bfbb5..20c88e5707b 100644
--- a/commands/core/upgrade.go
+++ b/commands/core/upgrade.go
@@ -74,7 +74,7 @@ func upgradePlatform(pm *packagemanager.PackageManager, platformRef *packagemana
 	if err != nil {
 		return &arduino.PlatformNotFoundError{Platform: platformRef.String()}
 	}
-	if _, err := installPlatform(pm, platformRelease, tools, downloadCB, taskCB, skipPostInstall); err != nil {
+	if err := installPlatform(pm, platformRelease, tools, downloadCB, taskCB, skipPostInstall); err != nil {
 		return err
 	}
 
diff --git a/rpc/cc/arduino/cli/commands/v1/core.pb.go b/rpc/cc/arduino/cli/commands/v1/core.pb.go
index 5c3c89022df..fc5844fef4f 100644
--- a/rpc/cc/arduino/cli/commands/v1/core.pb.go
+++ b/rpc/cc/arduino/cli/commands/v1/core.pb.go
@@ -51,6 +51,9 @@ type PlatformInstallRequest struct {
 	// Set to true to not run (eventual) post install scripts for trusted
 	// platforms
 	SkipPostInstall bool `protobuf:"varint,5,opt,name=skip_post_install,json=skipPostInstall,proto3" json:"skip_post_install,omitempty"`
+	// Set to true to skip installation if a different version of the platform
+	// is already installed.
+	NoOverwrite bool `protobuf:"varint,6,opt,name=no_overwrite,json=noOverwrite,proto3" json:"no_overwrite,omitempty"`
 }
 
 func (x *PlatformInstallRequest) Reset() {
@@ -120,6 +123,13 @@ func (x *PlatformInstallRequest) GetSkipPostInstall() bool {
 	return false
 }
 
+func (x *PlatformInstallRequest) GetNoOverwrite() bool {
+	if x != nil {
+		return x.NoOverwrite
+	}
+	return false
+}
+
 type PlatformInstallResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -827,7 +837,7 @@ var file_cc_arduino_cli_commands_v1_core_proto_rawDesc = []byte{
 	0x69, 0x6e, 0x6f, 0x2e, 0x63, 0x6c, 0x69, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x73,
 	0x2e, 0x76, 0x31, 0x1a, 0x27, 0x63, 0x63, 0x2f, 0x61, 0x72, 0x64, 0x75, 0x69, 0x6e, 0x6f, 0x2f,
 	0x63, 0x6c, 0x69, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x61, 0x6e, 0x64, 0x73, 0x2f, 0x76, 0x31, 0x2f,
-	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0xef, 0x01, 0x0a,
+	0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x92, 0x02, 0x0a,
 	0x16, 0x50, 0x6c, 0x61, 0x74, 0x66, 0x6f, 0x72, 0x6d, 0x49, 0x6e, 0x73, 0x74, 0x61, 0x6c, 0x6c,
 	0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x40, 0x0a, 0x08, 0x69, 0x6e, 0x73, 0x74, 0x61,
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@@ -842,72 +852,11 @@ var file_cc_arduino_cli_commands_v1_core_proto_rawDesc = []byte{
 	0x69, 0x6f, 0x6e, 0x18, 0x04, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x76, 0x65, 0x72, 0x73, 0x69,
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 }
 
 var (
diff --git a/rpc/cc/arduino/cli/commands/v1/core.proto b/rpc/cc/arduino/cli/commands/v1/core.proto
index 2b7e6a917f7..dbb086fa54b 100644
--- a/rpc/cc/arduino/cli/commands/v1/core.proto
+++ b/rpc/cc/arduino/cli/commands/v1/core.proto
@@ -33,6 +33,9 @@ message PlatformInstallRequest {
   // Set to true to not run (eventual) post install scripts for trusted
   // platforms
   bool skip_post_install = 5;
+  // Set to true to skip installation if a different version of the platform
+  // is already installed.
+  bool no_overwrite = 6;
 }
 
 message PlatformInstallResponse {
diff --git a/test/test_core.py b/test/test_core.py
index 920032f24f8..fdf8a711ff5 100644
--- a/test/test_core.py
+++ b/test/test_core.py
@@ -265,7 +265,14 @@ def test_core_install(run_command):
     assert result.ok
     assert _in(result.stdout, "arduino:avr", "1.6.16")
 
-    # Replace it with a more recent one
+    # Replace it with the same with --no-overwrite (should NOT fail)
+    assert run_command(["core", "install", "arduino:avr@1.6.16", "--no-overwrite"])
+
+    # Replace it with a more recent one with --no-overwrite (should fail)
+    result = run_command(["core", "install", "arduino:avr@1.6.17", "--no-overwrite"])
+    assert result.failed
+
+    # Replace it with a more recent one without --no-overwrite (should succeed)
     assert run_command(["core", "install", "arduino:avr@1.6.17"])
     result = run_command(["core", "list", "--format", "json"])
     assert result.ok