diff --git a/eng/common/build.ps1 b/eng/common/build.ps1
index 813d440d2a8..67ee6d28d3f 100644
--- a/eng/common/build.ps1
+++ b/eng/common/build.ps1
@@ -20,6 +20,7 @@ Param(
   [switch] $publish,
   [switch] $clean,
   [switch][Alias('bl')]$binaryLog,
+  [switch][Alias('nobl')]$excludeCIBinarylog,
   [switch] $ci,
   [switch] $prepareMachine,
   [switch] $help,
@@ -58,6 +59,7 @@ function Print-Usage() {
   Write-Host "Advanced settings:"
   Write-Host "  -projects <value>       Semi-colon delimited list of sln/proj's to build. Globbing is supported (*.sln)"
   Write-Host "  -ci                     Set when running on CI server"
+  Write-Host "  -excludeCIBinarylog     Don't output binary log (short: -nobl)"
   Write-Host "  -prepareMachine         Prepare machine for CI run, clean up processes after build"
   Write-Host "  -warnAsError <value>    Sets warnaserror msbuild parameter ('true' or 'false')"
   Write-Host "  -msbuildEngine <value>  Msbuild engine to use to run build ('dotnet', 'vs', or unspecified)."
@@ -134,7 +136,9 @@ try {
   }
 
   if ($ci) {
-    $binaryLog = $true
+    if (-not $excludeCIBinarylog) {
+      $binaryLog = $true
+    }
     $nodeReuse = $false
   }
 
diff --git a/eng/common/build.sh b/eng/common/build.sh
index 36f9aa0462e..6d7c5a1f69c 100755
--- a/eng/common/build.sh
+++ b/eng/common/build.sh
@@ -32,6 +32,7 @@ usage()
   echo "Advanced settings:"
   echo "  --projects <value>       Project or solution file(s) to build"
   echo "  --ci                     Set when running on CI server"
+  echo "  --excludeCIBinarylog     Don't output binary log (short: -nobl)"
   echo "  --prepareMachine         Prepare machine for CI run, clean up processes after build"
   echo "  --nodeReuse <value>      Sets nodereuse msbuild parameter ('true' or 'false')"
   echo "  --warnAsError <value>    Sets warnaserror msbuild parameter ('true' or 'false')"
@@ -68,6 +69,7 @@ clean=false
 warn_as_error=true
 node_reuse=true
 binary_log=false
+exclude_ci_binary_log=false
 pipelines_log=false
 
 projects=''
@@ -98,6 +100,9 @@ while [[ $# > 0 ]]; do
     -binarylog|-bl)
       binary_log=true
       ;;
+    -excludeCIBinarylog|-nobl)
+      exclude_ci_binary_log=true
+      ;;
     -pipelineslog|-pl)
       pipelines_log=true
       ;;
@@ -156,8 +161,10 @@ done
 
 if [[ "$ci" == true ]]; then
   pipelines_log=true
-  binary_log=true
   node_reuse=false
+  if [[ "$exclude_ci_binary_log" == false ]]; then
+    binary_log=true
+  fi
 fi
 
 . "$scriptroot/tools.sh"
diff --git a/eng/common/tools.ps1 b/eng/common/tools.ps1
index f31377a6be5..d504da64857 100644
--- a/eng/common/tools.ps1
+++ b/eng/common/tools.ps1
@@ -7,9 +7,11 @@
 # Build configuration. Common values include 'Debug' and 'Release', but the repository may use other names.
 [string]$configuration = if (Test-Path variable:configuration) { $configuration } else { 'Debug' }
 
+# Set to true to opt out of outputting binary log while running in CI
+[bool]$excludeCIBinarylog = if (Test-Path variable:excludeCIBinarylog) { $excludeCIBinarylog } else { $false }
+
 # Set to true to output binary log from msbuild. Note that emitting binary log slows down the build.
-# Binary log must be enabled on CI.
-[bool]$binaryLog = if (Test-Path variable:binaryLog) { $binaryLog } else { $ci }
+[bool]$binaryLog = if (Test-Path variable:binaryLog) { $binaryLog } else { $ci -and !$excludeCIBinarylog }
 
 # Set to true to use the pipelines logger which will enable Azure logging output.
 # https://github.com/Microsoft/azure-pipelines-tasks/blob/master/docs/authoring/commands.md
@@ -605,8 +607,8 @@ function MSBuild() {
 #
 function MSBuild-Core() {
   if ($ci) {
-    if (!$binaryLog) {
-      Write-PipelineTelemetryError -Category 'Build' -Message 'Binary log must be enabled in CI build.'
+    if (!$binaryLog -and !$excludeCIBinarylog) {
+      Write-PipelineTelemetryError -Category 'Build' -Message 'Binary log must be enabled in CI build, or explicitly opted-out from with the -excludeCIBinarylog switch.'
       ExitWithExitCode 1
     }
 
diff --git a/eng/common/tools.sh b/eng/common/tools.sh
index a9dff4408c2..e94fce22ec3 100755
--- a/eng/common/tools.sh
+++ b/eng/common/tools.sh
@@ -18,9 +18,17 @@ fi
 # Build configuration. Common values include 'Debug' and 'Release', but the repository may use other names.
 configuration=${configuration:-'Debug'}
 
+# Set to true to opt out of outputting binary log while running in CI
+exclude_ci_binary_log=${exclude_ci_binary_log:-false}
+
+if [[ "$ci" == true && "$exclude_ci_binary_log" == false ]]; then
+  binary_log_default=true
+else
+  binary_log_default=false
+fi
+
 # Set to true to output binary log from msbuild. Note that emitting binary log slows down the build.
-# Binary log must be enabled on CI.
-binary_log=${binary_log:-$ci}
+binary_log=${binary_log:-$binary_log_default}
 
 # Turns on machine preparation/clean up code that changes the machine state (e.g. kills build processes).
 prepare_machine=${prepare_machine:-false}
@@ -404,8 +412,8 @@ function MSBuild {
 
 function MSBuild-Core {
   if [[ "$ci" == true ]]; then
-    if [[ "$binary_log" != true ]]; then
-      Write-PipelineTelemetryError -category 'Build'  "Binary log must be enabled in CI build."
+    if [[ "$binary_log" != true && "$exclude_ci_binary_log" != true ]]; then
+      Write-PipelineTelemetryError -category 'Build'  "Binary log must be enabled in CI build, or explicitly opted-out from with the -noBinaryLog switch."
       ExitWithExitCode 1
     fi