diff --git a/tests/toranj/build.sh b/tests/toranj/build.sh
index 907b6e45a..12b5497f2 100755
--- a/tests/toranj/build.sh
+++ b/tests/toranj/build.sh
@@ -39,6 +39,7 @@ display_usage() {
     echo "        ncp        : Build OpenThread NCP FTD mode with POSIX platform"
     echo "        rcp        : Build OpenThread RCP (NCP in radio mode) with POSIX platform"
     echo "        posix-app  : Build OpenThread POSIX App NCP"
+    echo "        cmake      : Configure and build OpenThread using cmake/ninja (RCP and NCP) only"
     echo ""
     echo "Options:"
     echo "        -c/--enable-coverage  Enable code coverage"
@@ -131,6 +132,14 @@ case ${build_config} in
         make -j 8 || die
         ;;
 
+    cmake)
+        echo "===================================================================================================="
+        echo "Building OpenThread (NCP/CLI for FTD/MTD/RCP mode) with POSIX platform using cmake"
+        echo "===================================================================================================="
+        cmake -GNinja -DOT_PLATFORM=posix -DOT_CONFIG=../tests/toranj/openthread-core-toranj-config.h . || die
+        ninja || die
+        ;;
+
     *)
       echo "Error: Unknown configuration \"$1\""
       display_usage