diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index c61d15ed446b4..0c2c21335a806 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -8,6 +8,7 @@ docs/compilers @dotnet/roslyn-compiler
 docs/ide @dotnet/roslyn-ide
 
 eng/ @dotnet/roslyn-infrastructure
+eng/SourceBuild* @dotnet/source-build-internal
 scripts/ @dotnet/roslyn-infrastructure
 
 src/Analyzers/ @dotnet/roslyn-ide
diff --git a/eng/SourceBuild.props b/eng/SourceBuild.props
index a8b55f352ade9..c0ca9b21c9bb5 100644
--- a/eng/SourceBuild.props
+++ b/eng/SourceBuild.props
@@ -1,3 +1,5 @@
+<!-- Whenever altering this or other Source Build files, please include @dotnet/source-build-internal as a reviewer. -->
+
 <Project>
 
   <PropertyGroup>
diff --git a/eng/SourceBuildPrebuiltBaseline.xml b/eng/SourceBuildPrebuiltBaseline.xml
index a6de405305083..6fc9593ba0f39 100644
--- a/eng/SourceBuildPrebuiltBaseline.xml
+++ b/eng/SourceBuildPrebuiltBaseline.xml
@@ -1,3 +1,6 @@
+<!-- Whenever altering this or other Source Build files, please include @dotnet/source-build-internal as a reviewer. -->
+<!-- See aka.ms/dotnet/prebuilts for guidance on what pre-builts are and how to eliminate them. -->
+
 <UsageData>
   <IgnorePatterns>
     <UsagePattern IdentityGlob="Microsoft.SourceBuild.Intermediate.*/*" />