diff --git a/BUILD.md b/BUILD.md
index 43ca1f9..1e44145 100644
--- a/BUILD.md
+++ b/BUILD.md
@@ -135,6 +135,9 @@ ThirdParty components prior to building OpenFOAM itself.
   Automatically invoked from the ThirdParty `Allwmake`,
   but can be invoked directly to resolve possible build errors.
 
+`makeMGridGen`
+- Optional agglomeration routines.
+
 `makeCCMIO`
 - Only required for conversion to/from STARCD/STARCCM+ files.
 
diff --git a/makeMGridGen b/makeMGridGen
new file mode 100755
index 0000000..fdf395f
--- /dev/null
+++ b/makeMGridGen
@@ -0,0 +1,186 @@
+#!/bin/sh
+#------------------------------------------------------------------------------
+# =========                 |
+# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+#  \\    /   O peration     |
+#   \\  /    A nd           | Copyright (C) 2017 OpenCFD Ltd.
+#    \\/     M anipulation  |
+#------------------------------------------------------------------------------
+# License
+#     This file is part of OpenFOAM.
+#
+#     OpenFOAM is free software: you can redistribute it and/or modify it
+#     under the terms of the GNU General Public License as published by
+#     the Free Software Foundation, either version 3 of the License, or
+#     (at your option) any later version.
+#
+#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+#     for more details.
+#
+#     You should have received a copy of the GNU General Public License
+#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+#
+# Script
+#     makeMGridGen
+#
+# Description
+#     Build script for MGridGen (serial)
+#
+# ----------------------------------------------
+# NO USER-CONFIGURABLE SETTINGS WITHIN THIS FILE
+#------------------------------------------------------------------------------
+# Run from ThirdParty directory only
+wmakeCheckPwd "$WM_THIRD_PARTY_DIR" || {
+    echo "Error: Current directory is not \$WM_THIRD_PARTY_DIR"
+    echo "    The environment variables are inconsistent with the installation."
+    echo "    Check the OpenFOAM entries in your dot-files and source them."
+    exit 1
+}
+. etc/tools/ThirdPartyFunctions
+#------------------------------------------------------------------------------
+
+# mgridgen version from OpenFOAM etc/config.sh file:
+_foamEtc config.sh/mgridgen
+
+mgridgenPACKAGE=${MGRIDGEN_VERSION:-mgridgen-none}
+
+#------------------------------------------------------------------------------
+usage() {
+    exec 1>&2
+    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
+    cat<<USAGE
+
+usage: ${0##*/} [OPTION] [mgridgen-VERSION]
+options:
+  -gcc              Force gcc/g++ instead of the values from \$WM_CC, \$WM_CXX
+  -help
+
+* Build MGridGen
+      $mgridgenPACKAGE
+
+USAGE
+    exit 1
+}
+
+#------------------------------------------------------------------------------
+# Compiler settings for CMake/configure
+[ -n "$WM_CC" ]  && export CC="$WM_CC"
+[ -n "$WM_CXX" ] && export CXX="$WM_CXX"
+
+# Parse options
+while [ "$#" -gt 0 ]
+do
+    case "$1" in
+    -h | -help)
+        usage
+        ;;
+    -gcc)
+        useGcc  # Use gcc/g++
+        ;;
+    mgridgen-[1-9]* | MGridGen-[1-9]* | parmgridgen-[1-9]* | ParMGridGen-[1-9]*)
+        mgridgenPACKAGE="${1%%/}"
+        ;;
+    *)
+        die "unknown option/argument: '$1'"
+        ;;
+    esac
+    shift
+done
+
+[ -n "$mgridgenPACKAGE" ] || die "The mgridgen-VERSION was not specified"
+
+# nothing to build
+if _foamIsNone "$mgridgenPACKAGE"
+then
+    echo "Using mgridgen-none (skip ThirdParty build of MGridGen)"
+    exit 0
+elif _foamIsSystem "$mgridgenPACKAGE"
+then
+    echo "Using mgridgen-system"
+    exit 0
+fi
+
+#------------------------------------------------------------------------------
+#
+# Build MGridGen
+
+#   MGRIDGEN_SOURCE_DIR : location of the original sources
+#   MGRIDGEN_ARCH_PATH  : installation directory
+
+MGRIDGEN_SOURCE_DIR=$WM_THIRD_PARTY_DIR/$mgridgenPACKAGE
+MGRIDGEN_ARCH_PATH=$installBASE$WM_PRECISION_OPTION$WM_LABEL_OPTION/$mgridgenPACKAGE
+
+: ${FOAM_MPI:=dummy}
+
+echo
+echo ========================================
+echo "Build mgridgen library $mgridgenPACKAGE"
+echo
+
+#
+# Manual installation
+#
+install()
+{
+   echo "Install into $MGRIDGEN_ARCH_PATH"
+
+   local bindir=$MGRIDGEN_ARCH_PATH/bin
+   local incdir=$MGRIDGEN_ARCH_PATH/include
+   local libdir=$MGRIDGEN_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH
+
+   for dir in $MGRIDGEN_ARCH_PATH $bindir $incdir $libdir
+   do
+       mkdir -m 0755 -p $dir
+   done
+
+   cp -vf mgridgen.h   $incdir
+   cp -vf libmgrid.a   $libdir
+   cp -vf mgridgen     $bindir
+
+   chmod -R 0644 $incdir/* $libdir/*
+   chmod -R 0755 $bindir/*
+}
+
+
+# Needs future adjustment
+# - for shared library
+# - for mpi-specific library locations
+if [ -f $MGRIDGEN_ARCH_PATH/include/mgridgen.h \
+  -a -r $MGRIDGEN_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH/libmgrid.a ]
+then
+    echo "    MGridGen header in $MGRIDGEN_ARCH_PATH/include"
+    echo "    MGridGen libs   in $MGRIDGEN_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH" # static
+    echo
+else
+(
+    cd $MGRIDGEN_SOURCE_DIR || exit 1
+    [ -e Makefile ] && make realclean 2>/dev/null
+
+    # Remove any existing build folder and recreate
+    rm -rf $MGRIDGEN_ARCH_PATH
+
+    serial="${CC:-$WM_CC}"   # CC (serial compiler)   default=cc
+    # parallel=$(whichMpicc)   # PARCC (parallel compiler) default=mpicc
+    # PARCC=$parallel
+    # PARLD=$parallel
+    # PARLIBS="-L../.. -lparmgrid -lmgrid -lm"
+
+    make \
+        COPTIONS="-fPIC"  \
+        LDOPTIONS="-fPIC" \
+        CC=$serial \
+        LD=$serial \
+        LIBDIR="-L../.." \
+        LIBS="-L../.. -lmgrid -lm" \
+        make=make \
+        serial \
+    && install \
+    && echo "Built: $mgridgenPACKAGE"
+) || {
+    echo "Error building: $mgridgenPACKAGE"
+}
+fi
+
+#------------------------------------------------------------------------------